WO2010055929A1 - Hsp90を標的にした新規抗がんキメラペプチド - Google Patents
Hsp90を標的にした新規抗がんキメラペプチド Download PDFInfo
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- WO2010055929A1 WO2010055929A1 PCT/JP2009/069405 JP2009069405W WO2010055929A1 WO 2010055929 A1 WO2010055929 A1 WO 2010055929A1 JP 2009069405 W JP2009069405 W JP 2009069405W WO 2010055929 A1 WO2010055929 A1 WO 2010055929A1
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- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
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- A61K38/1703—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
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- A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
- A61K47/62—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being a protein, peptide or polyamino acid
- A61K47/66—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being a protein, peptide or polyamino acid the modifying agent being a pre-targeting system involving a peptide or protein for targeting specific cells
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- A61P35/00—Antineoplastic agents
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- A—HUMAN NECESSITIES
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
- A61P35/02—Antineoplastic agents specific for leukemia
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- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
- G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
- G01N33/5011—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics for testing antineoplastic activity
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/574—Immunoassay; Biospecific binding assay; Materials therefor for cancer
- G01N33/57407—Specifically defined cancers
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/574—Immunoassay; Biospecific binding assay; Materials therefor for cancer
- G01N33/57407—Specifically defined cancers
- G01N33/57426—Specifically defined cancers leukemia
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- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
- C07K2319/01—Fusion polypeptide containing a localisation/targetting motif
- C07K2319/10—Fusion polypeptide containing a localisation/targetting motif containing a tag for extracellular membrane crossing, e.g. TAT or VP22
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- C07K2319/70—Fusion polypeptide containing domain for protein-protein interaction
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Definitions
- the present invention relates to a drug targeting Hsp90.
- Immunotoxins monoclonal antibodies or ligands for proteins over-expressed on the surface of cancer cells conjugated to plant or bacterial toxins have been extensively studied for their potential use as anticancer agents (non- Patent Document 1).
- a number of immunotoxins have been tested in preclinical and clinical trials, with interleukin-2-diphtheria toxin (IL2-DT; Ontak®, Eisai) being chronic T-cell lymphocytic leukemia (CLL) Is approved by the US Food and Drug Administration (FDA) (Non-patent document 2; Non-patent document 3).
- IL2-DT interleukin-2-diphtheria toxin
- CLL chronic T-cell lymphocytic leukemia
- Pseudomonas exotoxin-based immunotoxins including interleukin-4-Pseudomonas exotoxin [IL4 (38-37) -PE38KDEL] and interleukin-13-Pseudomonas exotoxin (IL13-PE38QQR) have been tested in clinical trials.
- Non-Patent Document 4 Non-Patent Document 5
- diphtheria toxin and Pseudomonas exotoxin act by catalytically inactivating elongation factor 2 in the ribosome complex after being incorporated into the lysosome, activated, and translocated to the cytosol. . This mechanism of action allows immunotoxins to efficiently destroy dormant non-replicating tumor cells.
- Non-patent document 2 Non-patent document 4; Non-patent document 6
- the molecular size of immunotoxins is generally large compared to compound or fragment antibody drugs, which can prevent the drug from penetrating efficiently into tumor masses in the human body.
- a new generation of immunotoxins with an evolved approach is critically needed.
- Hsp90 protein which is one of heat shock proteins, is widely present in all cells and is one of important proteins indispensable for cell function regulation.
- survivin which is one of anti-apoptosis proteins (which prevent cells from undergoing apoptosis) that is highly expressed in cancer cells, is correctly folded and functions by Hsp90.
- geldanamycin a compound that exhibits anticancer activity by inhibiting its activity, have been widely published.
- inhibition of protein function by a compound is very difficult to avoid side effects due to the fact that the compound is stable in the cell and a functional disorder that the compound can give to normal cells.
- Hsp90 inhibitors may also act on normal cells, and side effects may be a problem. Since the toxicity of geldanamycin was not tolerated, 17-allylaminogeldanamycin (17-AAG) (seed) was effective as a derivative of Hsp90 in the same manner as geldanamycin and reduced kidney and liver toxicity. Spymycin (also called tanespymycin).
- Non-Patent Document 7 an anticancer drug candidate called shepherdin has been proposed (Non-Patent Document 7, Non-Patent Document 8).
- this shepherdine directly inhibits the binding between survivin and Hsp90, and due to contact with the ATP pocket, the protein to be bound is destabilized and does not perform its original function.
- in-vivo effects that are not effective.
- Pastan I.D Targeted therapy of cancer with recombinant immunotoxins.
- An object of the present invention is to provide a substance that can be used as an anticancer agent or DDS that can avoid side effects due to intracellular stability and functional impairment to normal cells.
- the challenge is to design an anticancer drug with a new structure that has selectivity against normal cells, has anticancer activity at low doses in vivo, has few side effects, and is highly efficient and effective.
- Hsp90 is not responsible for the function alone, but can function as a chaperone that assists in folding proteins such as survivin by binding to Hop, which is one of the partner proteins. It was. Therefore, in the present invention, focusing on the amino acid in the TPR (tetratricopeptide repeat) domain that is important for Hop binding to Hsp90, this amino acid and the previously reported cell-permeable peptide Antp are used. By combining and introducing this chimeric peptide into cells, the inventors invented a novel peptide capable of specifically killing only cancer cells, and proved its utility by experiments.
- the present invention has selectivity for cancer cells that could not be predicted by the knowledge of the prior art relating to Hsp90, and is anti-cancer by in vivo, particularly quantitative (1-5) mg / kg units even when administered systemically. It has been found that peptide anticancer agents that are effective can be prepared.
- the present invention is used as a drug delivery system (DDS).
- DDS drug delivery system
- An agent for delivering a target substance to cancer cells comprising an Hsp90 TPR domain-binding peptide.
- Such DDS concept is based on, for example, transfection reagents such as liposomes as a whole, and DDS can be used as an experiment using transfection reagents (liposomal introduction) and TPR peptides and scrambled peptides (“scramble (peptide ) ”) Is introduced into cells at the same concentration, and the cell killing effect is observed.
- the present invention provides the following.
- the present invention provides an agent for delivering a target substance to cancer cells and a related drug delivery technique (DDS), which includes an Hsp90 TPR domain-binding peptide.
- DDS drug delivery technique
- the Hsp90 TPR domain-binding peptide used in the present invention and the target substance are included with or without being bound to each other.
- the Hsp90 TPR domain binding peptide used in the present invention and the target substance are fusion substances bound to each other.
- the fusion substance used in the present invention is a peptide.
- the Hsp90 TPR domain-binding peptide used in the present invention and the target substance are contained without being bound to each other.
- the Hsp90 TPR domain binding peptide used in the present invention is included on a vehicle.
- the Hsp90 TPR domain binding peptide used in the present invention is contained on a vehicle, and the target substance is contained in the vehicle.
- the vehicle used in the present invention is a liposome.
- the present invention relates to a medicament for regulating cancer cells, comprising an Hsp90 TPR domain binding peptide and a target substance.
- the medicament is, in one embodiment, a composition.
- the target substance used in the present invention is an anticancer agent.
- the Hsp90 TPR domain binding peptide used in the present invention is present on a vehicle.
- the vehicle used in the present invention is a liposome.
- the present invention provides a peptide toxin comprising a target-binding peptide and a cell-killing soluble peptide component.
- the present invention provides a chimeric peptide having an Hsp90 TPR domain binding peptide and a cell-penetrating peptide.
- the Hsp90 TPR domain binding peptide used in the present invention has the amino acid sequence KAYARIGNSYFK (SEQ ID NO: 4; where the alphabet is a single letter representation of amino acids) or a modified sequence thereof. is there.
- the Hsp90 TPR domain binding peptide used in the present invention is It has the amino acid sequence X 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X 10 X 11 X 12 (SEQ ID NO: 1), wherein X 1 is K or an amino acid similar thereto Is; X 2 is A or an amino acid similar thereto; X 3 is Y or a similar amino acid; X 4 is A or an amino acid similar thereto; X 5 is R or an amino acid similar thereto; X 6 is I or an amino acid similar thereto; X 7 is G or an amino acid similar thereto; X 8 is N or an amino acid similar thereto; X 9 is S or an amino acid similar thereto; X 10 is Y or a similar amino acid; X 11 is F or an amino acid similar thereto; X 12 is either an amino acid similar K or to, or was extended TPR peptide RQIAKAYARIGNSYFKEEKY
- the Hsp90 TPR domain binding peptide used in the present invention is It has the amino acid sequence X 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X 10 X 11 X 12 (SEQ ID NO: 1), wherein X 1 is K, R or A Yes (preferably K); X 2 is A or G; X 3 is Y or L (preferably Y); X 4 is A or G; X 5 is R, A or K (preferably R); X 6 is I, A or R (preferably R); X 7 is G or A; X 8 is N or Q; X 9 is S or Y; X 10 is Y or S; X 11 is F or Y; and / or X 12 is K or R, or RQIAKAYARIGNSYFKEEKYK (SEQ ID NO: 43) with an extended TPR peptide.
- the invention relates to an Hsp90 TPR domain binding peptide, X 2 is G; X 4 is G; X 7 is A; X 4 is Q; X 9 is Y; X 10 is S; X 11 is Y; and / or X 12 is R.
- the invention relates to an Hsp90 TPR domain binding peptide, X 4 is G; X 9 is Y; X 11 is Y. Including things.
- the Hsp90 TPR domain binding peptide used in the present invention has the amino acid sequence KAYAR (SEQ ID NO: 3).
- Hsp90 TRP domain binding peptide used in the present invention include those having amino acid sequence KAYARX a X b X c X d Z 1 Z 2 Z 3 (SEQ ID NO: 2), wherein, X a, X b, X c and X d are independently any amino acid, Z 1 Z 2 Z 3 is formed a helix is an important amino acids to maintain.
- this Z 1 Z 2 Z 3 is (Y / H) (F / E / M / L / S) (K / A / L / Q / S) (ie, Z 1 is Y or H Z 2 is F, E, M, L or S, and Z 3 is K, A, L, Q or S).
- the Hsp90 TPR domain binding peptide used in the present invention is KAYAR (SEQ ID NO: 3) or KAYARIGNSYFK (SEQ ID NO: 4).
- the cell penetrating peptide used in the present invention is an antennapedia homeobox sequence (Antp) RQIKIWFQNRRMKWKK (SEQ ID NO: 5), a TAT YGRKKRRQRRR (SEQ ID NO: 6), or RRRRRRRRRRRR (SEQ ID NO: 7) or a modified sequence thereof.
- the cell-killing peptide used in the present invention is RQKIKIWFQNRRMKWKK (SEQ ID NO: 5) or a modified sequence thereof, which is the amino acid sequence Y 1 Y 2 Y 3 Y 4 Y 5 Y 6 Y 7 Y 8 Y 9 Y 10 Y 11 Y 12 Y 13 Y 14 Y 15 Y 16 (SEQ ID NO: 8), wherein Y 1 is R or an amino acid similar thereto; Y 2 is Q or an amino acid similar thereto; Y 3 is I or an amino acid similar thereto; Y 4 is K or an amino acid similar thereto; Y 5 is I or an amino acid similar thereto; Y 6 is Q or an amino acid similar thereto; Y 7 is F or an amino acid similar thereto; Y 8 is Q or an amino acid similar thereto; Y 9 is N or an amino acid similar thereto; Y 10 is R or an amino acid similar thereto; Y 11 is R or an amino acid similar thereto; Y 12 is
- the cell-killing peptide used in the present invention is RQKIKIWFQNRRMKWKK (SEQ ID NO: 5) or a modified sequence thereof, which is the amino acid sequence Y 1 Y 2 Y 3 Y 4 Y 5 Y 6 Y 7 Y 8 Y 9 Y 10 Y 11 Y 12 Y 13 Y 14 Y 15 Y 16 (SEQ ID NO: 8), wherein Y 1 is R or K; Y 2 is Q or N; Y 3 is I or L; Y 4 is K or R; Y 5 is I or L; Y 6 is W or Y; Y 7 is F or Y; Y 8 is Q or N; Y 9 is N or Q; Y 10 is R or K; Y 11 is R or K; Y 12 is M or C; Y 13 is K or R; Y 14 is W or Y; Y 15 is K or R; and / or Y 16 is K or R. It has an arrangement.
- the present invention is, Y 2 in said cell penetrating peptide, is N; Y 4 is R; Y 8 is N; Y 9 is Q; Y 10 is K; Y 11 is K; Y 12 is C; Y 13 is R; Y 14 is Y; Y 15 is R; and / or Y 16 is R; Includes those having sequences.
- the invention relates to the cell penetrating peptide of the invention, wherein Y 4 is R; Y 9 is Q; Y 12 is C; and / or Y 16 is R; Includes those having sequences.
- the chimeric peptide of the invention ArukyuaiKIWFQNRRMKWKKKAYARIGNSYFK (SEQ ID NO: 9), RQIKIWFQNRRMKWKKRAYARIGNSYFK (SEQ ID NO: 10), RQIKIWFQNRRMKWKKAAYARIGNSYFK (SEQ ID NO: 11), RQIKIWFQNRRMKWKKKGYARIGNSYFK (SEQ ID NO: 12), RQIKIWFQNRRMKWKKKALARIGNSYFK (SEQ ID NO: 13), RQIKIWFQNRRMKWKKKAYGRIGNSYFK (SEQ No.
- RQKIWFQNRRMKWKKKAYAKIGNSYFK SEQ ID NO: 15
- RQKIKIWFQNRRMKWKKKAYARRGNSYFK SEQ ID NO: 16
- RQKIKIWFQNRR KWKKKAYARIANSYFK SEQ ID NO: 17
- RQIKIWFQNRRMKWKKKAYARIGQSYFK SEQ ID NO: 18
- RQIKIWFQNRRMKWKKKAYARIGNYYFK SEQ ID NO: 19
- RQIKIWFQNRRMKWKKKAYARIGNSSFK SEQ ID NO: 20
- RQIKIWFQNRRMKWKKKAYARIGNSYYK SEQ ID NO: 21
- RQIKIWFQNRRMKWKKKAYARIGNSYFR SEQ ID NO: 22
- KQIKIWFQNRRMKWKKKAYARIGNSYFK SEQ ID NO: 23
- the present invention provides a medicament, preferably a pharmaceutical composition, comprising the chimeric peptide of the present invention.
- the present invention provides an anticancer agent comprising the chimeric peptide of the present invention.
- the present invention relates to the use of the chimeric peptide of the present invention for the production of a pharmaceutical composition.
- the present invention relates to the use of the chimeric peptide of the present invention for the production of an anticancer agent.
- the present invention relates to a therapeutic method including the step of administering the chimeric peptide of the present invention.
- the present invention relates to a method for treating cancer comprising the step of administering the chimeric peptide of the present invention.
- the present invention relates to a pharmaceutical screening method using the amino acid sequence in the TPR domain of Hsp90.
- the present invention relates to a method for screening an anticancer drug using the amino acid sequence in the TPR domain of Hsp90.
- the amino acid sequence of the TPR domain that binds to the C-terminal sequence of Hsp90 for use in the present invention is, or analogs (preferably EierukeiikeiierujienudieiwaikeikeikeidiefuditieierukeieichiwaidikeieikeiierudiPitienuemutiwaiaitienukyueieibuiwaiefuikeijidiwaienukeishiaruierushiikeieiaiibuijiaruienuaruidiwaiarukyuaieikeieiwaieiaruaijienuesuwaiefukeiiikeidieiaieichiefuwaienukeiesuerueiEHRTPDVLKKCQQAEKILKEQERLA (SEQ ID NO: 41), conserved Analog with substitution
- the present invention is effective only for cancer cells, and not very effective for normal cells, so that a novel cancer-specific drug can be provided.
- a novel cancer-specific drug can be provided.
- it can be greatly expected that the problem of side effects of anticancer drugs, which is currently a problem in clinical practice, can be solved.
- the effect of killing cancer cells with only 5 amino acids, preferably 12 amino acids, is also a remarkable effect.
- FIG. 1 shows a schematic diagram (A) of a heat shock protein (Hsp) component protein (Hop) and a three-dimensional structure diagram (B, C) of a region essential for binding of Hop to Hsp90.
- FIG. 1 (A) shows a schematic diagram of the Hop protein showing two independent TPR domains TRP1 and TPR2A, which interact with the C-terminal tail of Hsp70 and Hsp90, respectively. The arrow indicates the interaction between TPR2A and Hsp90.
- FIG. 1 (B) and FIG. 1 (C) show three-dimensional structure display software (Ras Mol ver 2.7 for Machintosh (free software, http://www.openrasmol.org) regarding the region indispensable for binding to Hsp90.
- Figure 1 (B) shows the three-dimensional structure of the complex of the TOP domain of Hop and the C-terminal sequence MEEVD (SEQ ID NO: 64) (center white) of Hsp90 that has been reported.
- this three-dimensional structure diagram (B) one of the helices important for binding to Hsp90 (arrow) is the region used for the design, and
- Fig. 1 (C) shows the predicted peptide (left) and Hsp90. It is a three-dimensional structure figure of a composite_body
- FIG. 2 shows the results of an interaction analysis between Hsp90 immobilized on a sensor chip and a newly designed Antp-TPR peptide using BIACORE (a biomolecule interaction analyzer). As shown in FIG. 2, it was found that the peptide was bound depending on the concentration of the peptide. It was also found that the affinity constant (Kd) was 2.09 ⁇ 10 ⁇ 6 .
- FIG. 3 shows the cytotoxic activity of Antp-TPR and Antp-TPR mutant peptides. 3A shows the result of Antp-KAYAR (SEQ ID NO: 42), FIG. 3B shows the result of Antp-KAYARIGNSYFK (SEQ ID NO: 9), FIG.
- FIG. 3C shows the result of KAYARIGNSYFK (SEQ ID NO: 4), and FIG. 3D shows the result of TAT-KAYARIGNSYFK.
- the result of (SEQ ID NO: 50) is shown.
- FIGS. 3E and 3F show the results of mutants 1 and 2 (Antp-KAYAAAGNNSYFK (SEQ ID NO: 44) and Antp-KAYARIGNSGGG (SEQ ID NO: 45)), respectively.
- Antp has the sequence shown in SEQ ID NO: 5.
- the vertical axis represents cell viability (%)
- the horizontal axis represents peptide concentration ( ⁇ M).
- FIG. 4 shows the results of Western blotting for cells with a high killing effect.
- Antp-TPR peptide (68 ⁇ M) The expression level of the client protein in T47D cells incubated with Antp-TPR peptide (68 ⁇ M) for 48 hours was analyzed by Western blotting using a specific antibody. From the left, the expression levels of Hsp90, CDK4, Akt, Survivin, and ⁇ -actin (control) are shown (from the top) in the absence or presence of Antp-TPR. The expression levels of Hsp90, Hsp70, survivin, and ⁇ -actin (control) from HEB, Caki-1 cells, Bxpc cells, T47D cells, and A549 cells (from the top) were confirmed by Antp-TPR peptide (from the left).
- FIG. 5 is an activity correlation diagram obtained by mutating each amino acid in the TPR to the amino acid sequence shown in the figure. The cytotoxic activity by an Antp-TPR variant peptide is shown.
- FIG. 6 shows the cytotoxic activity against Caki-1 by mutant peptides performed using TPR wild type and slung extended type and R11 instead.
- FIG. 7 shows that the TPR2A domain protein immobilized on the sensor chip is preliminarily mixed with Hsp90 and TPR peptide, TPR scramble, TPR mutant 1, or TPR mutant 2 peptide in advance and sufficiently bound to Hsp90. In this experiment, the inhibitory effect was confirmed by confirming the interaction with TPR2A.
- the TPR peptide affects the interaction between Hsp90 and TPR2A due to its increased concentration, but the TPR scramble, TPR mutant 1, or TPR mutant 2 peptide has a high concentration added beforehand. However, the complete inhibition is not seen.
- (A) shows the case where only Hsp90 is added to the immobilized TPR2A or a mixture of TPR peptides of various concentrations (1.4 ⁇ M, 14 ⁇ M, 140 ⁇ M, 280 ⁇ M, 700 ⁇ M and 1 mM) previously added is added.
- (B) is a sensorgram when the experiment of (A) was similarly performed using the TPR scramble peptide, and the sensorgram did not drop even if a high concentration of the TPR scramble peptide was added in advance. , Indicating no change in binding.
- FIG. 8A is an activity correlation diagram obtained by mutating each amino acid in the cell-penetrating peptide to the amino acid sequence shown in the figure. The cytotoxic activity by an Antp-TPR variant peptide is shown.
- FIG. 8B shows the effect on solid cancer by local administration of Antp-TPR in vivo.
- the horizontal axis indicates the number of days after transplantation, and the arrow indicates the day of administration.
- the vertical axis shows the tumor volume (mm 3 ).
- An anti-cancer effect is clearly seen in the Antp-TPR peptide administration group.
- FIG. 8C shows the effect on solid cancer by intravenous administration of Antp-TPR in vivo.
- FIG. 9 shows the examination of the cancer cell killing effect by the hybrid Antp-TPR peptide using FACS.
- Cancer cells T47D and normal cells HEK293T were cultured in 6-well dishes (Nunc TM ) for 24 hours in the respective media, and then 68 ⁇ M Antp-TPR chimeric peptide was added and further cultured for 24 hours. After the culture, propidium iodide (PI) staining (AF), annexin V labeling (AD) (all obtained from Wako), or caspase 3,7 labeling (for each cell suspension) E, F) (obtained from immunochemistry Technologies) and the results of simultaneous analysis of Annexin V labeling or caspase 3,7 activity and PI staining by multiparametric flow cytometry. The percentage of cells in each quadrant is shown.
- PI propidium iodide
- AD annexin V labeling
- E, F caspase 3,7 labeling
- A is a case where no peptide is added to normal HEK293T cells.
- B shows the case where 68 ⁇ M Antp-TPR peptide was added to normal HEK293T cells.
- C and E are cases where no peptide is added to the breast cancer cell T47D.
- D and F are the cases where 68 ⁇ M Antp-TPR peptide was added to breast cancer cell T47D.
- Addition of Antp-TPR peptide to normal cells HEK293T has no effect, but when the peptide is added to cancer cell T47D, an increase in annexin V-positive or caspase 3, 7-positive cell populations is observed. This suggests that the added peptide specifically induces cancer cell death by an apoptotic mechanism.
- FIG. 11 shows the cytotoxic activity of two Hsp90 inhibitors and the Antp-TPR chimeric peptide of the present invention.
- D is a graph of the cytocidal effect of the Antp-TPR chimeric peptide on solid cancer cell lines (BT20, OE19, MCF-7).
- FIG. 12 shows the results of Western blotting for leukemia cell lines.
- FIG. 13 shows the results of a permeation experiment using the Antp-TPR chimeric peptide using the acute myeloid leukemia cell line U937.
- A TAMRA-labeled Antp-TPR was confirmed to permeate into cells, but with TPR peptide, it was confirmed not to permeate into cells. Each arrow in the figure indicates a cell through which the peptide has permeated.
- FIG. 13 shows the results of a permeation experiment using the Antp-TPR chimeric peptide using the acute myeloid leukemia cell line U937.
- B Since the intp-TPR chimeric peptide permeated into the cells, no influx of calcein (green) was observed, and it was also found that the permeation was performed without destroying the cell membrane. Furthermore, the membrane is not broken even if the peptide permeates. Each arrow in the figure indicates a cell through which the peptide has permeated.
- FIG. 14 shows the results of examining the cancer cell killing effect in the leukemia cell line U937 by the Antp-TPR chimeric peptide.
- FIG. 15 shows the disappearance of Hsp90 client protein by the Antp-TPR chimeric peptide.
- FIG. 16 shows the effect of cell killing effect on U937 cell line due to mutation of each amino acid of Antp-TPR chimeric peptide.
- FIG. 17 shows the results of examining the cell killing effect between species.
- A Killing of an Antp-TPR chimeric peptide against peripheral blood mononuclear leukocytes (Peripheral blood mononuclear cells: PBMCs), normal human B cells, and mouse leukemia cell line EL4 containing normal lymphocytes collected from mouse peripheral blood Show the effect.
- Antp-TPR chimeric peptide has no cell-killing effect on mouse PBMCs or human normal B cells, and also has a cell-killing effect on mouse leukemia cell lines.
- B A comparison of the amino acid sequence of the Hsp90 C-terminal side of human, mouse, rat, and bovine and the TPR2A domain in HOP. Sequences important for the anti-cancer activity of the Antp-TPR chimeric peptide (Hsp90 C-terminal sequence MEEVD (SEQ ID NO: 64) and TPR2A domain sequence KAYARIGNSYFK (SEQ ID NO: 4) in HOP) are human, mouse Completely conserved among rat, bovine species.
- FIG. 18 shows the results of a permeation experiment of Antp-TPR chimeric peptide against mouse leukemia cell lines EL4 and PBMCs.
- the mouse cell line is permeated with the Antp-TPR chimeric peptide, and even when permeated, normal cell PBMCs do not show a cytocidal effect, and a mouse leukemia cell line shows a cytocidal effect. Observed.
- Hsp90 is one of heat shock proteins, and is a molecular chaperone having a molecular weight of about 90,000 (90 kDa) which is present in the largest amount in eukaryotic cells.
- the structure is represented by the sequence described in GenBank # NM_001017963 (human) or Entrez Gene ID 3320, and these homologs are also included as long as they retain the functions of a representative example of Hsp.
- Human Hsp90 was constructed by constructing a human Hsp90 gene sequence cDNA clone (AB1144_H10, ORIGENTECNOLOGIES, INC., ROCKVILLE, MD) by using the GATEWAY system (Invitrogene) and constructing an expression vector for Escherichia coli with a histidine tag (pDEST17). -Hsp90) is transformed into Escherichia coli BL21 strain, and after confirming the expression of Hsp90, Hsp90 can be purified using a nickel column (His-Trap: Amersham Pharmacia, now GE Healthcare).
- Hsp90 has a role of interacting with a large number of intracellular proteins to ensure its correct folding and function.
- proteins that interact with Hsp90 include many signaling molecules that play an important role in cell growth or differentiation, such as protein kinases and steroid hormone receptors. Expression levels increase when cells are stressed. However, not only under the stress condition of cells but also in the cytoplasm at normal times, when Hsp90 is destroyed, normal function is lost.
- Hsp90 TPR tetratricopeptide repeat
- an important peptide can be designed by elucidating the three-dimensional structure (PDB ID 1ELR) of the complex structure of the TPR2A domain and the C-terminal peptide of Hsp90.
- the present inventors do not bear the function of Hsp90 alone, but can exhibit a chaperone function that assists folding of a protein such as survivin by binding with Hop, which is one of the partner proteins. I also found out what I can do.
- the “Hsp90 TPR domain-binding peptide” is a peptide that can bind to the Hsp90 TPR domain. In the present invention, no cell killing effect was observed with the TPR peptide alone. It is thought that the TPR peptide itself enters the cell.
- a typical Hsp90 TPR domain-binding peptide has the amino acid sequence X 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X 10 X 11 X 12 (SEQ ID NO: 1), And X 1 is an amino acid such as R or A of K or the same hydrophilic amino acid similar thereto; X 2 is an amino acid such as G, V, L, or I of an aliphatic side chain similar to A or the like; X 3 is an amino acid such as Y or a similar hydrophobic amino acid L; X 4 is an amino acid such as G, V, L, or I of an aliphatic side chain similar to A or the like; X 5 is R or an amino acid similar thereto; X 6 is I or an amino acid similar thereto; X 7 is an amino acid such as A found in G or other TPR domains similar to it; X 8 is an amino acid such as Q found in N or other TPR domains similar to it; X 9 is an
- amino acid sequence found in other TPR domains refers to the following, but is not limited thereto: KALFRRAKAHEK (human Tom 70; SEQ ID NO: 46), KAFYRRAQAHAK (Tom 34; SEQ ID NO: 47), KGLFRRGEAHLA (FKBP52; SEQ ID NO: 48), KARYRRAQGWQG (CYP40; SEQ ID NO: 49) and the like.
- X 1 is , K, R or A, preferably K
- X 2 is A or G
- X 3 is Y or L, preferably Y
- X 4 is A or G
- X 5 is R, A or K, preferably R
- X 6 is I, A or R, preferably I or A
- X 7 is G or A
- X 8 is N or Q
- X 9 is S or Y
- X 10 is Y or S
- X 11 is F or Y
- X 12 is K or R, or RQIAKAYARIGNSYFKEKYKYK (SEQ ID NO: 43) obtained by extending the TPR peptide, and X 1 to X 12 can be effective in any combination.
- X 4 is G; X 9 is Y; X 11 is Y. It is understood that any combination of these preferred substitutions may be effective. This is because these substitutions have found enhanced effects.
- Antp-TPR long that is, Antp-RQIAKAYARIGNSYFKEEKYK (SEQ ID NO: 39). Since there was no reduction in the effect even when extended, the present invention can be used regardless of the length of the amino acid, and those skilled in the art will be able to use various sequences and lengths based on the description in the present specification. It is understood that can be prepared.
- Hsp90 TPR domain binding peptide can be used in the present invention even if it is not these sequences as long as it has the ability to bind to an Hsp90 TPR domain.
- Z 1 Z 2 Z 3 is (Y / H) (F / E / M / L / S) (which may be K / A / L / Q / S), where X a , X b , X c and X d is independently any amino acid, and Z 1 Z 2 Z 3 is an amino acid important for forming and maintaining a helix, KAYAR (SEQ ID NO: 3) itself or KAYARIGNSYFK (SEQ ID NO: 4) itself, And so on.
- the “cell-penetrating peptide” refers to a peptide that can penetrate the cell membrane and enter the inside of the cell. Whether a certain peptide is a “cell permeable peptide” can be evaluated by the following test.
- Antp biotinylated Antp peptide was added to cells by a known method (Derossi, et al., J. Biol. Chem. 1996, 271, 18188-18193.), And then streptavidin was added. A chemical labeling compound is added, and intracellular localization can be confirmed with a fluorescence microscope.
- cell-penetrating peptides examples include RQIKIWFQNRRMKWKK (SEQ ID NO: 5), which is an antennapedia homeobox sequence (Antp), YGRKKRRQRRR (SEQ ID NO: 6), or RRRRRRRRRRR (SEQ ID NO: 7) or a variant thereof. Can be mentioned.
- a typical example of the structure is Gene ID 155871 (TAT protein itself). In the present invention, since the cell killing effect could be demonstrated with either R11 or TAT, it is understood that any cell-penetrating peptide bound before TPR is used.
- a typical cell penetrating peptide has the following structure: RQKIKIWFQNRRMKWKK (SEQ ID NO: 5) or a modified sequence thereof, which is the amino acid sequence Y 1 Y 2 Y 3 Y 4 Y 5 Y 6 Y 7 Y 8 Y 9 Y 10 Y 11 Y 12 Y 13 Y 14 Y 15 Y 16 (SEQ ID NO: 8), wherein Y 1 is an amino acid such as R or a hydrophilic amino acid K similar thereto; Y 2 is an amino acid such as E as Q or a similar amide N, Glx (herein, “Glx” includes Gln and Glu); Y 3 is an amino acid such as I or similar aliphatic L; Y 4 is an amino acid such as K or a similar hydrophilic amino acid R; Y 5 is an amino acid such as I or similar aliphatic L; Y 6 is an amino acid such as Y having W or an aromatic similar thereto; Y 7 is an amino acid such as
- the cell-penetrating peptide according to the present invention has the above amino acid sequence, and Y 2 is N; Y 4 is R; Y 8 is N; Y 9 is Q; Y 10 is K; Y 11 is K; Y 12 is C; Y 13 is R; Y 14 is Y; Y 15 is R; and / or Y 16 is R; It will be understood that these preferred substitutions may be effective in any combination, including those having sequences. This is because these substitutions have been found to maintain or enhance the effect.
- the cell-penetrating peptide according to the present invention has the above amino acid sequence, and Y 4 is R; Y 9 is Q; Y 12 is C; or Y 16 is R, It will be understood that these preferred substitutions may be effective in any combination, including those having sequences. This is because these substitutions have found enhanced effects.
- mutations may be introduced. Without wishing to be bound by theory, it is understood that certain mutations are permissible, but retain activity in the original active conformation and interaction with the biological target of interest. Or, it is understood that it is enhanced, and it is expected that a combination of a plurality of these will have the same effect.
- sequence in the TPR domain has high homology, it has already been found that the combination with partner proteins (Hsp70, Hsp90, etc.) is strictly recognized. In the case of the present invention, with respect to those whose activity is changed by substitution of one amino acid, it is predicted that the interaction with the partner protein was affected.
- RQKIKIWFQNRRMKWKKKAYARIGNSYFK SEQ ID NO: 9
- YGRKKRRQRRR SEQ ID NO: 6
- TAT YGRKKRRQRRR
- RRRRRRRRRRR SEQ ID NO: 7
- the combination with Antp can be used.
- amino acid important for forming and maintaining a helix refers to any amino acid sequence that plays an important role in forming and maintaining a helix.
- Representative examples of the TPR domain include (Y / H) (F / E / M / L / S) (K / A / L / Q / S), but are not limited thereto.
- chimeric peptide refers to a single peptide made from two or more different genotype portions (peptides). Also called fusion protein. It is used to examine the function of a protein domain and to detect the expression of a target protein.
- similar amino acids typically include amino acids that are in a conservative substitution relationship, and include the following amino acids.
- similar amino acids those frequently found in other sequences having similar functions may be used. This is because it has been proved that it can be replaced.
- similar amino acids may be those described elsewhere in this specification. This is because similar amino acids specifically described are within a range where the effect can be maintained or understood from the specific example in a specific example.
- amino acid frequently found in TPR peptides refers to those frequently found in various TPR peptides, and typically includes amino acids having a conservative substitution, and includes the following amino acids: Is applicable. It has the amino acid sequence X 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X 10 X 11 X 12 (SEQ ID NO: 1), wherein X 1 is K or similar A hydrophilic amino acid such as R or A; X 2 is an amino acid such as G, V, L, or I of an aliphatic side chain similar to A or the like; X 3 is an amino acid such as Y or a similar hydrophobic amino acid L; X 4 is an amino acid such as G, V, L, or I of an aliphatic side chain similar to A or the like; X 5 is R or an amino acid similar thereto; X 6 is I or an amino acid similar thereto; X 7 is an amino acid such as A found in G or other
- amino acids frequently found in cell-penetrating peptides are those frequently found in various cell-penetrating peptides, typically amino acids that are related to conservative substitutions. And the following amino acids are applicable:
- RQKIKIWFQNRRMKWKK (SEQ ID NO: 5) or a modified sequence thereof, which is the amino acid sequence Y 1 Y 2 Y 3 Y 4 Y 5 Y 6 Y 7 Y 8 Y 9 Y 10 Y 11 Y 12 Y 13 Y 14 Y 15 Y 16 (SEQ ID NO: 8), wherein Y 1 is an amino acid such as R or a similar hydrophilic amino acid K; Y 2 is an amino acid such as E as Q, N or Glx of an amide system similar thereto; Y 3 is an amino acid such as I or similar aliphatic L; Y 4 is an amino acid such as K or a similar hydrophilic amino acid R; Y 5 is an amino acid such as I or similar aliphatic L; Y 6 is an amino acid such as Y having W or an aromatic similar thereto; Y 7 is an amino acid such as Y having F or an aromatic similar thereto; Y 8 is an amino acid such as E as
- protein protein
- polypeptide oligopeptide
- peptide refers to a polymer of amino acids having an arbitrary length.
- This polymer may be linear, branched, or cyclic.
- the amino acid may be natural or non-natural and may be a modified amino acid.
- the term can also encompass one assembled into a complex of multiple polypeptide chains.
- the term also encompasses natural or artificially modified amino acid polymers. Such modifications include, for example, disulfide bond formation, glycosylation, lipidation, acetylation, phosphorylation or any other manipulation or modification (eg, conjugation with a labeling component).
- This definition also includes, for example, polypeptides containing one or more analogs of amino acids (eg, including unnatural amino acids, etc.), peptide-like compounds (eg, peptoids) and other modifications known in the art. Is included.
- amino acid may be natural or non-natural as long as the object of the present invention is satisfied.
- nucleic acid is also used interchangeably with gene, cDNA, mRNA, oligonucleotide, and polynucleotide.
- Particular nucleic acid sequences also include “splice variants”.
- a particular protein encoded by a nucleic acid implicitly encompasses any protein encoded by a splice variant of that nucleic acid.
- a “splice variant” is the product of alternative splicing of a gene. After transcription, the initial nucleic acid transcript can be spliced such that different (another) nucleic acid splice products encode different polypeptides. The production mechanism of splice variants varies, but includes exon alternative splicing.
- polypeptides derived from the same nucleic acid by read-through transcription are also encompassed by this definition. Any product of a splicing reaction (including recombinant forms of splice products) is included in this definition. Alternatively, allelic variants fall within this range.
- polynucleotide As used herein, “polynucleotide”, “oligonucleotide”, and “nucleic acid” are used interchangeably herein and refer to a nucleotide polymer of any length. The term also includes “oligonucleotide derivatives” or “polynucleotide derivatives”. “Oligonucleotide derivatives” or “polynucleotide derivatives” refer to oligonucleotides or polynucleotides that include derivatives of nucleotides or that have unusual linkages between nucleotides, and are used interchangeably.
- oligonucleotide examples include, for example, 2′-O-methyl-ribonucleotide, an oligonucleotide derivative in which a phosphodiester bond in an oligonucleotide is converted to a phosphorothioate bond, and a phosphodiester bond in an oligonucleotide.
- oligonucleotide derivatives in which ribose and phosphodiester bond in oligonucleotide are converted to peptide nucleic acid bond uracil in oligonucleotide is C— Oligonucleotide derivatives substituted with 5-propynyluracil, oligonucleotide derivatives wherein uracil in the oligonucleotide is substituted with C-5 thiazole uracil, cytosine in the oligonucleotide is C-5 propynylcytosine Substituted oligonucleotide derivatives, oligonucleotide derivatives in which cytosine in the oligonucleotide is substituted with phenoxazine-modified cytosine, oligonucleotide derivatives in which the ribose in DNA is substituted with 2'-
- a particular nucleic acid sequence may also be conservatively modified (eg, degenerate codon substitutes) and complementary sequences, as well as those explicitly indicated. Is contemplated. Specifically, a degenerate codon substitute creates a sequence in which the third position of one or more selected (or all) codons is replaced with a mixed base and / or deoxyinosine residue. (Batzer et al., Nucleic Acid Res. 19: 5081 (1991); Ohtsuka et al., J. Biol. Chem. 260: 2605-2608 (1985); Rossolini et al., Mol. Cell. Probes 8: 91-). 98 (1994)).
- nucleotide may be natural or non-natural as long as the desired function is maintained.
- search refers to finding another nucleobase sequence having a specific function and / or property using a nucleobase sequence electronically or biologically or by other methods.
- Electronic search includes BLAST (Altschul et al., J. Mol. Biol. 215: 403-410 (1990)), FASTA (Pearson & Lipman, Proc. Natl. Acad. Sci., USA 85: 2444-). 2448 (1988)), Smith and Waterman method (Smith and Waterman, J. Mol. Biol. 147: 195-197 (1981)), and Needleman and Wunsch method (Needleman and Wunsch, J. Mol. Biol. 48:44). -453 (1970)), but is not limited thereto.
- Bio searches include stringent hybridization, macroarrays with genomic DNA affixed to nylon membranes, microarrays affixed to glass plates (microarray assays), PCR and in situ hybridization, etc. It is not limited to. In the present specification, it is intended that the gene (for example, Hsp90 etc.) used in the present invention should include the corresponding gene identified by such electronic search or biological search.
- nucleic acid sequence that hybridizes to a specific gene sequence can also be used as long as it has a function.
- stringent conditions for hybridization means that a complementary strand of a nucleotide strand having similarity or homology to the target sequence preferentially hybridizes to the target sequence, and similarity or homology. It means a condition in which a complementary strand of a non-sexual nucleotide strand does not substantially hybridize.
- complementary strand of a certain nucleic acid sequence refers to a nucleic acid sequence (for example, T for A and C for G) that pair based on hydrogen bonding between the bases of the nucleic acid.
- Stringent conditions are sequence-dependent and will be different in different circumstances. Longer sequences hybridize specifically at higher temperatures. Generally, stringent conditions are selected to be about 5 ° C. lower than the thermal melting temperature (Tm) for the specific sequence at a defined ionic strength and pH. T m is the temperature at which 50% of the nucleotides complementary to the target sequence hybridize to the target sequence in equilibrium under a defined ionic strength, pH, and nucleic acid concentration. “Stringent conditions” are sequence-dependent and depend on various environmental parameters.
- stringent conditions are such that the salt concentration is less than about 1.0 M Na + , and typically about 0.01 to 1.0 M Na + concentration at pH 7.0 to 8.3 ( Or other salts) and the temperature is at least about 30 ° C. for short nucleotides (eg, 10-50 nucleotides) and at least about 60 ° C. for long nucleotides (eg, longer than 50 nucleotides).
- Stringent conditions may also be achieved with the addition of destabilizing agents such as formamide.
- Stringent conditions herein include hybridization in a buffer solution of 50% formamide, 1M NaCl, 1% SDS (37 ° C.), and washing at 60 ° C. with 0.1 ⁇ SSC. It is done.
- polynucleotide hybridizing under stringent conditions refers to well-known conditions commonly used in the art. Such a polynucleotide can be obtained by using a colony hybridization method, a plaque hybridization method, a Southern blot hybridization method, or the like using a polynucleotide selected from among the polynucleotides of the present invention as a probe. Specifically, hybridization was performed at 65 ° C. in the presence of 0.7 to 1.0 M NaCl using a filter on which colony or plaque-derived DNA was immobilized, and then a 0.1 to 2-fold concentration was obtained. Means a polynucleotide that can be identified by washing the filter under the condition of 65 ° C.
- hybridize refers to a polynucleotide that can hybridize to another polynucleotide under the above hybridization conditions.
- the hybridizable polynucleotide is a polynucleotide having at least 60% homology with the base sequence of DNA encoding a polypeptide having the amino acid sequence specifically shown in the present invention, preferably 80% Examples thereof include a polynucleotide having the above homology, a polynucleotide having a homology of 90% or more, and more preferably a polynucleotide having a homology of 95% or more.
- Amino acids may be referred to herein by either their commonly known three letter symbols or by the one-letter symbols recommended by the IUPAC-IUB Biochemical Nomenclature Commission. Nucleotides may also be referred to by a generally recognized one letter code.
- homology of a gene refers to the degree of identity of two or more gene sequences to each other. Therefore, the higher the homology between two genes, the higher the sequence identity or similarity. Whether two genes have homology can be examined by direct sequence comparison or, in the case of nucleic acids, hybridization methods under stringent conditions.
- the DNA sequence between the gene sequences is typically at least 50% identical, preferably at least 70% identical, more preferably at least 80%, 90% , 95%, 96%, 97%, 98% or 99% are identical, the genes are homologous.
- the comparison of similarity, identity, and homology between amino acid sequences and base sequences is calculated using default parameters using BLAST, which is a sequence analysis tool.
- the identity search can be performed using, for example, NCBI BLAST 2.2.9 (issued 2004.12).
- the identity value usually refers to a value when the BLAST is used and aligned under default conditions. However, if a higher value is obtained by changing the parameter, the highest value is the identity value. When identity is evaluated in a plurality of areas, the highest value among them is set as the identity value.
- the “corresponding” gene refers to a gene having, or expected to have, the same action as that of a predetermined gene in a species as a reference for comparison in a certain species.
- a gene corresponding to a gene eg, Hsp90
- genes corresponding to human genes can be found in other animals (mouse, rat, pig, rabbit, guinea pig, cow, sheep, etc.). Such corresponding genes can be identified using techniques well known in the art.
- the corresponding gene in an animal is the sequence of that animal (eg, mouse, rat, pig, rabbit, guinea pig, cow, sheep, etc.) using the sequence of the gene serving as the reference for the corresponding gene as a query sequence. It can be found by searching the database.
- fragment refers to a polypeptide or polynucleotide having a sequence length of 1 to n ⁇ 1 with respect to a full-length polypeptide or polynucleotide (length is n). .
- the length of the fragment can be appropriately changed according to the purpose.
- the lower limit of the length is 3, 4, 5, 6, 7, 8, 9, 10, Examples include 15, 20, 25, 30, 40, 50 and more amino acids, and lengths expressed in integers not specifically listed here (eg, 11 etc.) are also suitable as lower limits.
- examples include 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 40, 50, 75, 100 and more nucleotides.
- Non-integer lengths may also be appropriate as a lower limit.
- the lengths of polypeptides and polynucleotides can be represented by the number of amino acids or nucleic acids, respectively, as described above. However, the above numbers are not absolute, and as long as they have the same function, the length Alternatively, the above-mentioned number as the lower limit is intended to include the upper and lower numbers (or, for example, up and down 10%) of the number. In order to express such intention, in this specification, “about” may be added before the number. However, it should be understood herein that the presence or absence of “about” does not affect the interpretation of the value.
- the length of a fragment useful herein can be determined by whether or not at least one of the functions of a full-length protein that serves as a reference for the fragment is retained.
- modified body refers to a substance in which a part of the original substance such as a polypeptide or polynucleotide is changed. Such variants include substitutional variants, addition variants, deletion variants, truncated variants, allelic variants, and the like.
- An allele refers to genetic variants that belong to the same locus and are distinguished from each other. Therefore, an “allelic variant” refers to a variant having an allelic relationship with a certain gene.
- Specific homologue or homolog means homology (preferably at least 60% homology, more preferably at least 80%, at a certain amino acid level or nucleotide level within a certain species. 85% or higher, 90% or higher, 95% or higher homology). The method for obtaining such species homologues will be apparent from the description herein.
- amino acid additions, deletions, or modifications can also be made to produce functionally equivalent polypeptides.
- Amino acid substitution refers to substitution of one or more of the original peptide with, for example, 1 to 10, preferably 1 to 5, more preferably 1 to 3 amino acids.
- Addition of amino acid means adding one or more, for example, 1 to 10, preferably 1 to 5, more preferably 1 to 3 amino acids to the original peptide chain.
- Deletion of amino acids refers to deletion of one or more, for example, 1 to 10, preferably 1 to 5, more preferably 1 to 3 amino acids from the original peptide.
- Amino acid modifications include, but are not limited to, amidation, carboxylation, sulfation, halogenation, alkylation, phosphorylation, hydroxylation, acylation (eg, acetylation), and the like.
- the amino acid to be substituted or added may be a natural amino acid, a non-natural amino acid, or an amino acid analog. Natural amino acids are preferred.
- Such a nucleic acid can be obtained by a well-known PCR method, and can also be chemically synthesized. These methods may be combined with, for example, a site-specific displacement induction method or a hybridization method.
- substitution, addition and / or deletion of a polypeptide or polynucleotide refers to an amino acid or a substitute thereof, or a nucleotide or a substitute thereof, respectively, relative to the original polypeptide or polynucleotide.
- Replacing, adding, or removing Such substitution, addition and / or deletion techniques are well known in the art, and examples of such techniques include site-directed mutagenesis techniques.
- peptide production and analysis The peptides of the present invention (eg, chimeric peptides) can be obtained or produced by methods well known in the art (eg, chemical synthesis, general engineering techniques discussed below). For example, peptides that match a portion of a peptide that contains the desired region or domain, or that mediate the desired activity in vitro, can be synthesized by use of a peptide synthesizer. Peptides can also be used to identify the hydrophobic and hydrophilic regions of peptides (see, eg, Hopp and Woods, 1981. Proc. Natl. Acad. Sci. USA 78: 3824-3828).
- Secondary structure analysis can also be performed to identify regions of the peptide that establish a particular structural motif (see, eg, Chou and Fasman, 1974, Biochem 13: 222-223). Manipulation, translation, secondary structure prediction, hydrophilic and hydrophobic profiles, open reading frame prediction and plotting, and determination of sequence homology are accomplished using computer software programs available in the art. obtain. Other methods of structural analysis include, for example, X-ray crystallography (see, eg, Engstrom, 1974. Biochem Exp Biol 11: 7-13); mass spectrometry and gas chromatography (eg, METHODS IN PROTEIN SCIENCE, 1997. See J. Wiley and Sons, New York, NY), and computer modeling (eg, Fletterick and Zoller, ed. Press, Cold Spring arbor, to a reference NY) it may also be used.
- X-ray crystallography see, eg, Engstrom, 1974. Biochem Exp Biol 11: 7-13
- mass spectrometry and gas chromatography
- the present invention further relates to a nucleic acid encoding the peptide of the present invention having an L-type amino acid.
- Suitable sources of nucleic acids encoding the peptides of the present invention include human genomic sequences. Other sources include rat genomic sequences, and protein sequences are each available from GenBank, which are hereby incorporated by reference in their entirety.
- the nucleic acid encoding the peptide can be obtained by any method known in the art (eg, by PCR amplification using synthetic primers capable of hybridizing to the 3′- and 5′-ends of the sequence, and / or cDNA or a given gene) By cloning from a genomic library using oligonucleotide sequences specific for the sequence).
- a nucleic acid comprising all or part of the peptide-encoding nucleic acid sequence contains an appropriate expression vector (i.e., the elements necessary for transcription and translation of the inserted peptide coding sequence). Containing vector).
- the regulatory element is heterologous (ie not a native gene promoter).
- the necessary transcriptional and translational signals can also be supplied by native promoters for the genes and / or their flanking regions.
- a variety of host vector systems may be utilized to express the peptide coding sequence.
- a mammalian cell line infected with vaccinia virus, adenovirus, etc . include, but are not limited to: (i) a mammalian cell line infected with vaccinia virus, adenovirus, etc .; (ii) an insect cell line infected with baculovirus, etc .; (iii) a yeast comprising a yeast vector or (Iv) Bacteria transformed with bacteriophage DNA, plasmid DNA, or cosmid DNA.
- any one of a number of suitable transcription and translation elements can be used.
- the promoter / enhancer sequence in the expression vector may be a plant, animal, insect or fungal regulatory sequence provided in the present invention.
- promoter / enhancer elements can be used from yeast and other fungi (eg, GAL4 promoter, alcohol dehydrogenase promoter, phosphoglycerol kinase promoter, alkaline phosphatase promoter).
- Expression vectors or derivatives thereof include, for example, human or animal viruses (eg, vaccinia virus or adenovirus); insect viruses (eg, baculovirus); yeast vectors; bacteriophage vectors (eg, ⁇ phage); plasmid vectors and A cosmid vector is mentioned.
- the host cell line may be chosen to modulate the expression of the inserted sequence of interest or to modify or process the expressed peptide encoded by this sequence in the specific manner desired. Furthermore, expression from a particular promoter can be enhanced in the presence of a particular inducer in a selected host cell line; thus facilitating control of the expression of commonly designed peptides. Furthermore, different host cells have specific characterized mechanisms for translational and post-translational processes as well as modification of expressed peptides (eg, glycosylation, phosphorylation, etc.). Thus, an appropriate cell line or host system can be selected to ensure that the desired modification and process of the foreign peptide has been achieved. For example, peptide expression in bacterial systems can be used to produce a core peptide that is not glycosylated; whereas expression in mammalian cells ensures “native” glycosylation of heterologous peptides.
- nucleic acids the derivatives, fragments and analogs provided herein are defined as at least 6 (adjacent) nucleic acid sequences, and these are of sufficient length to allow specific hybridization.
- amino acids the derivatives, fragments and analogs provided herein are defined as a sequence of at least 4 (adjacent) amino acids and are long enough to allow specific recognition of the epitope.
- modification of the cell-penetrating peptide can also be modified based on the description in the present specification with reference to conventional knowledge.
- Danielle Derossi et al. The Journal Of Biological Chemistry Vol. 271, no. 30, Issue of July 26, pp. 18188-18193, 1996 provides insights into Antp, its mechanism and variants with some mutations. These describe sites important for cell permeation and can be referred to when producing variants and analogs of the present invention, which is incorporated herein by reference in its entirety. .
- the compound of the present invention or a pharmaceutically acceptable salt or solvate within the scope of the present invention can be administered alone as it is, but it is usually preferable to provide it as various pharmaceutical preparations. In addition, these pharmaceutical preparations are used for animals and humans.
- the administration route that can be used in the present invention is preferably one that is most effective in treatment, and can be oral or parenteral such as rectal, buccal, subcutaneous, intramuscular, intravenous, etc. .
- Administration forms include capsules, tablets, granules, powders, syrups, emulsions, suppositories, injections and the like.
- Liquid preparations such as emulsions and syrups suitable for oral administration are water, sugars such as sucrose, sorbit, fructose, glycols such as polyethylene glycol, propylene glycol, oils such as sesame oil, olive oil, soybean oil And preservatives such as p-hydroxybenzoates, and flavors such as strawberry flavor and peppermint.
- capsules, tablets, powders, granules, etc. are excipients such as lactose, glucose, sucrose and mannitol, disintegrants such as starch and sodium alginate, lubricants such as magnesium stearate and talc, polyvinyl It can be produced using a binder such as alcohol, hydroxypropyl cellulose, gelatin, a surfactant such as fatty acid ester, and a plasticizer such as glycerin.
- Formulations suitable for parenteral administration preferably comprise sterile aqueous preparations containing an active compound that is isotonic with the blood of the recipient.
- a solution for injection is prepared using a carrier comprising a salt solution, a glucose solution or a mixture of salt water and a glucose solution.
- Topical formulations that can be used in the invention are prepared by dissolving or suspending the active compound in one or more media, such as mineral oil, petroleum, polyhydric alcohols, or other bases used in topical pharmaceutical formulations. To do.
- Formulations for enteral administration that can be used in the invention are prepared using conventional carriers such as cacao butter, hydrogenated fat, hydrogenated fatty carboxylic acid and the like, and are provided as suppositories.
- glycols, oils, flavors, preservatives (including antioxidants), excipients, disintegrants, lubricants, binders, surfactants exemplified in oral preparations are also used in parenteral preparations.
- One or more auxiliary components selected from agents, plasticizers and the like can also be added.
- the effective dose and frequency of administration of the compound of the present invention or a pharmaceutically acceptable salt or solvate thereof vary depending on the dosage form, patient age, body weight, nature or severity of the condition to be treated, etc.
- the dosage is 0.01 to 1000 mg / person per day, preferably 5 to 500 mg / person, and the number of times of administration is preferably once a day or divided.
- the present invention also relates to a system, device, and kit for producing the pharmaceutical composition of the present invention. It is understood that the constituent requirements of such a system, apparatus, and kit can use those known in the art and can be appropriately designed by those skilled in the art.
- the present invention also relates to a system, device, and kit using a prodrug such as a compound of the present invention, a pharmaceutically acceptable salt or solvate thereof, or a hydrate thereof. It is understood that the constituent requirements of such a system, apparatus, and kit can use those known in the art and can be appropriately designed by those skilled in the art.
- DDS drug delivery vehicle
- delivery agent or “delivery vehicle” refers to a carrier (vehicle) that mediates delivery of a target substance. If the substance to be delivered is a drug, it is referred to as a “drug delivery vehicle”.
- the drug delivery system (Drug Delivery System, DDS) is also called a drug delivery system, and is sometimes classified into an absorption-controlled DDS, a controlled-release DDS, and a target-oriented DDS.
- An ideal DDS is a system that delivers a drug “to the necessary site in the body”, “a necessary amount”, and “only for the required time”.
- Targeting DDS is classified into passive targeting DDS and active targeting DDS.
- the former is a method of controlling the behavior in the body using physicochemical properties such as the particle size and hydrophilicity of the carrier (drug carrier).
- the latter is a method in which a special mechanism is added to these to actively control the directivity to the target tissue.
- an antibody having a specific molecule recognition function for a target molecule of a specific cell constituting the target tissue may be used, and may be referred to as “missile drug”.
- drug delivery vehicle refers to a vehicle for delivering a desired drug.
- target substance refers to a substance that is desired to be delivered into cells by a delivery vehicle.
- the “liposome” usually means a closed vesicle composed of a lipid layer assembled in a membrane shape and an inner aqueous layer.
- cholesterol, glycolipids and the like can also be incorporated. Since liposomes are closed vesicles containing water inside, it is possible to retain water-soluble drugs and the like in the vesicles. Therefore, such liposomes are used to deliver drugs or genes that cannot pass through cell membranes into cells.
- biocompatibility is good, the expectation as a nanoparticulate carrier material for DDS is great.
- the liposome is a structural unit (for example, glycolipid, ganglioside, phosphatidyl, etc.) having a functional group that imparts an ester bond by using a linker or a cross-linking agent as necessary in order to attach a modifying group.
- a linker or a cross-linking agent as necessary in order to attach a modifying group.
- Glycerol or the like or a structural unit having a functional group imparting a peptide bond (for example, phosphatidylethanolamine).
- the liposome can be prepared by any method known in the art. For example, among them, a method using a cholic acid dialysis method is exemplified. In the cholic acid dialysis method, production is carried out by a) preparation of mixed micelles of lipid and surfactant, and b) dialysis of mixed micelles. Next, in a preferred embodiment of the sugar chain liposome used in the present invention, it is preferable to use a protein as a linker, and the coupling of a glycoprotein having a sugar chain bound to the protein to the liposome is performed by the following two-step reaction. It can be carried out.
- a glycoprotein containing a desired sugar chain can be bound to the liposome, and a wide variety of glycoprotein / liposome conjugates having the desired sugar chain can be obtained. It is very important to examine the particle size distribution to see the purity and stability of the liposomes.
- GPC gel filtration chromatography
- SEM scanning electron microscope
- DLS dynamic light scattering
- the “linker” is a molecule that mediates binding between a surface-binding molecule (for example, Hsp90 TRP-binding peptide) and the liposome surface.
- a surface-binding molecule for example, Hsp90 TRP-binding peptide
- the peptide may be bound to the liposome surface via a linker.
- the linker can be appropriately selected by those skilled in the art, but is preferably biocompatible, and more preferably pharmaceutically acceptable.
- “linker protein” refers to a protein, peptide, or amino acid polymer among linker molecules.
- linker (protein) group is a name given when a linker (protein) is bonded to another group.
- a linker (protein) group refers to a monovalent or divalent group depending on the case. Examples thereof include a mammal-derived protein group, a human-derived protein group, a human serum protein group, and a serum albumin group.
- the linker (protein) group is preferably derived from “human”. This is because the compatibility with human administration is considered high. Also preferred are proteins that are not immunogenic.
- the “crosslinking group” refers to a group that forms a chemical bond between molecules of a chain polymer so as to form a bridge. Typically, it acts between macromolecules such as lipids, proteins, peptides, and sugar chains and other molecules (eg, lipids, proteins, peptides, sugar chains), and is covalently bonded within or between molecules. It refers to a group that forms a covalent bond that connects places that did not exist.
- the crosslinking group varies depending on the target for crosslinking, and examples thereof include, but are not limited to, aldehydes (for example, glutaraldehyde), carbodiimides, and imide esters. When the amino group-containing substance is crosslinked, an aldehyde-containing group such as glutaraldehyde can be used.
- biocompatibility means a property that is compatible with a living tissue or organ without causing toxicity, immune reaction, damage or the like.
- biocompatible buffer examples include phosphate buffered saline (PBS), physiological saline, Tris buffer, carbonate buffer (CBS), and tris (hydroxymethyl) methylaminopropanesulfonate buffer (TAPS).
- the present invention provides an agent for delivering a target substance to cancer cells containing an Hsp90 TPR domain-binding peptide.
- the target substance may or may not be bound to the Hsp90 TPR domain binding peptide. When bound, it becomes a fusion substance, and in the case of a peptide, it is called a chimeric peptide. It can also be said that the chimeric peptide of the present invention is this embodiment.
- a substance may form a composite agent by a medium (vehicle). As such a medium, a liposome can be used, and the target substance may be outside or inside the liposome.
- Liposomes prepared by mixing TPR peptide or TPR scrambled peptide with a commercially available transfection reagent (for example, Profect-P2 (Nacalai Tesque) or Lipofectamine TM LTX (Invitrogen), etc.) And then adding this complex to cancer cells (eg, Caki-1 (kidney cancer)), and then adding the cell viability to the WST-8 solution (Cell Count Reagent SF; Nacalai Tesque, Inc.) It is possible to confirm whether or not a killing effect is exhibited when the TPR peptide designed in the present invention is introduced into a cell by measuring using the TPR scramble peptide and comparing it with the case of adding the TPR scramble peptide.
- a commercially available transfection reagent for example, Profect-P2 (Nacalai Tesque) or Lipofectamine TM LTX (Invitrogen), etc.
- cancer cells eg, Caki-1 (kidney cancer)
- Example 1 Production of Hsp90 TRP-binding peptide-Antp chimeric peptide and measurement of biological activity
- the chimeric peptide of the present invention exhibits a cell killing effect or an antitumor effect in a solid cancer cell line.
- Cell line Human breast cancer cell lines (BT-20 and T47D), lung cancer cell lines (H322 and H460), prostate cancer cell line (LNCap), glioma cell line (U251), kidney cancer cell line (Caki-1) and A lung fibroblast cell line (MRC-5) was purchased from the American Type Culture Collection (Manassas, VA).
- a human pancreatic cancer cell line (BXPC-3) was purchased from the European Collection of Cell Cultures (ECACC; Salisbury, Wiltshire, UK).
- a human embryonic kidney cell line (HEK293) was purchased from RIKEN Cell Bank (Tsukuba City).
- the cells contain 10% FBS (BioWest, Miami, FL), 100 ⁇ g / ml penicillin and 100 ⁇ g / ml streptomycin (Nacalai Tesque, Kyoto), RPMI 1640 (BT-20, T47D, H322, H460, LNCap U251 and BXPC-3), MEM (MARC-5) or D-MEM (HEK293, Caki-1).
- peptide The following peptides were purchased from Invitrogen, Carlsbad, CA or synthesized on a peptide synthesizer (eg, Applied Biosystems: Model 433A peptide synthesizer).
- peptide synthesizer eg, Applied Biosystems: Model 433A peptide synthesizer.
- Chimeric peptide RQKIKIWFQNRRMKWKK-KAYARIGNSYFK (Antp-TPR wild; SEQ ID NO: 9)
- RQKIKIWFQNRRMKWKK SEQ ID NO: 5
- Antennapedia home sequence Antp
- the synthesized peptides are as follows. 2. Chimeric peptide: RQKIKIWFQNRRMKWKK-KAYAR (SEQ ID NO: 42) 3. Peptide: KAYARIGNSYFK (TPR peptide; SEQ ID NO: 4) 4). Chimeric peptide: RQKIKIWFQNRRMKWKK-KAYAAAAGNSYTFK (Mutant 1; SEQ ID NO: 44) 5). Chimeric peptide: RQKIKIWFQNRRMKWKK-KAYARIGNSGGG (Mutant 2; SEQ ID NO: 45) The following were also synthesized.
- RQKIKIWFQNRRMKWKKRAYARIGNSYFK (Antp-TPR K1R; SEQ ID NO: 10), RQKIKIWFQNRRMKWKKAAYARIGNSYFK (Antp-TPR K1A; SEQ ID NO: 11), RQKIKIWFQNRRMKWKKKGYARIGNSYFK (Antp-TPR A2G; SEQ ID NO: 12), RQIKIWFQNRRMKWKKALARIGNSYFK (Antp-TPR Y3L; SEQ ID NO: 13), RQKIKIWFQNRRMKWKKKAYGRIGNSYFK (Antp-TPR A4G; SEQ ID NO: 14), RQKIKIWFQNRRMKWKKKAYAKIGNSYFK (Antp-TPR R5K; SEQ ID NO: 15), RQKIKIWFQNRRMKWKKKAYARRGNSYFK (Antp-T
- KQIKIWFQNRRMKWKKKAYARIGNSYFK (AnR1K-TPR; SEQ ID NO: 23), RNIKIWFQNRRMKWKKKAYARIGNSYFK (AnQ2N-TPR; SEQ ID NO: 24), RQLKIWFQNRRMKWKKKAYARIGNSYFK (AnI3L-TPR; SEQ ID NO: 25), RQIRIWFQNRRMKWKKKAYARIGNSYFK (AnK4R-TPR; SEQ ID NO: 26), RQIKLFWFQNRRMKWKKKAYARIGNSYFK (AnI5L-TPR; SEQ ID NO: 27), RQKIYFQNRRMKWKKKAYARIGNSYFK (AnW6Y-TPR; SEQ ID NO: 28), RQKIWYQNRRMKWKKKAYARIGNSYFK
- Cell viability assay A total of 3 ⁇ 10 3 cells per well were seeded in 96-well plates, cultured for 24 hours in medium containing 10% FBS, and incubated with increasing concentrations of peptide at 100 ⁇ l for 48-72 hours at 37 ° C. . Cell viability was measured using a WST-8 solution (Cell Count Reagent SF; Nacalai Tesque, Inc.).
- Flow cytometry assay To investigate whether the Antp-TPR peptide induces apoptosis in cancer cells, a flow cytometry assay was performed using double staining of annexin V or caspase 3,7 and propidium iodide (PI). .
- the Antp-TPR peptide is added to the normal cell HEK293T, there is no effect, but when the peptide is added to the cancer cell T47D, an increase in the number of annexin V positive or caspase 3, 7 positive cells is observed. From this, it can be seen that in the cancer cell T47D, the cell is killed by the addition of this peptide, or the dead cell is undergoing apoptosis. In any case, an increase in cell death is seen with the peptides of the present invention, possibly suggesting that cell death is a mechanism mediated by apoptosis, and the present invention may be a preferable therapeutic method over conventional techniques. It is shown.
- HBS buffer (0.01 M HEPES, 0.15 M NaCl, 0.005% Tween 20, 3 mM EDTA [pH 7.4]
- HBS buffer 0.01 M HEPES, 0.15 M NaCl, 0.005% Tween 20, 3 mM EDTA [pH 7.4]
- Tween 20 3 mM EDTA [pH 7.4]
- a 10% skim milk solution was prepared with a phosphate buffered buffer (PBS), blocked for 1 hour 30 minutes, and then in an antibody solution against Hsp90, Hsp70, survivin, actin (Stressgen Bioreagents, SIGMA). The mixture was reacted overnight, then reacted with a secondary antibody (GE Healthcare), then chemically developed with an ECL kit (GE Health science), and a band was detected with a Las3000 system.
- PBS phosphate buffered buffer
- SIGMA stressgen Bioreagents
- the wild type of the newly designed peptide sequence is RQKIKIWFQNRRMKWKK-KAYARIGNSYFK (SEQ ID NO: 9).
- the peptide on the N-terminal side is a cell-permeable peptide Antp
- the peptide on the C-terminal side is a TPR peptide (the C-terminal of Hsp90 in the TPR2A domain of Hop as shown in FIG. 1 (A)).
- Hsp90 TRP-binding peptide that binds to the sequence of the part of the helix important for binding to the side.
- Fig. 3 is a three-dimensional structure diagram of a complex of a reported Hop TPR domain and the Hsp90 C-terminal sequence MEEVD (SEQ ID NO: 64) (center white), in which the binding to Hsp90 is shown.
- One of the most important helices (arrow) is the region used in this design, and
- FIG. 1 (C) shows the complex of the predicted peptide and the Hsp90 C-terminal sequence MEEVD (SEQ ID NO: 64) (right). In the figure displayed by software, it was predicted that only the helix in this region could sufficiently bind to Hsp90.
- FIG. 2 shows the result of analyzing the interaction between Hsp90 immobilized on the sensor chip and the newly designed Antp-TPR peptide using BIACORE (biomolecular interaction analyzer). Indicates that it was found to bind in a dependent manner. It was also found that the affinity constant (Kd) was 2.09 ⁇ 10 ⁇ 6 .
- FIG. 3 and the following table show the cytotoxic activity of Antp-TPR and Antp-TPR mutant peptides as a result.
- the chimeric peptide with the cell-permeable peptide Antp did not affect the normal cells HEK and MRC5 as shown in (A) and (B). It affects cancer cells Caki-1, (kidney cancer), Bxpc3 (pancreatic cancer), T47D (breast cancer), A549 (lung cancer), and extends from 5 amino acids of KAYAR (SEQ ID NO: 3). The effect of KAYARIGNSYFK (SEQ ID NO: 4) was higher, and the TPR peptide alone (C) showed no damage activity in any cell.
- FIG. 7 and the table below show that Hsp90 and TPR peptide, TPR scramble, TPR mutant 1, or TPR mutant 2 peptide were mixed in advance with the human Hop TPR2A domain protein immobilized on the sensor chip.
- the inhibitory effect was confirmed by confirming the interaction with TPR2A after sufficiently binding to Hsp90.
- the TPR peptide affects the interaction between Hsp90 and TPR2A by increasing its concentration (FIGS. 7A and C), while the TPR scramble, TPR mutant 1, or TPR mutant 2 peptide has a high level. Even if the concentration was added in advance, no complete inhibition was seen (FIGS. 7B and C).
- mutant 1 and mutant 2 in which a mutation was added to an amino acid predicted to be important retained the disorder activity, but the disorder activity decreased (FIG. 7A and C).
- the designed TPR peptide is a specific competitor that can inhibit the interaction between Hsp90 and Hop's TPR2A domain, and the amino acid targeted in the experiment with the mutant causes this protein interaction. It was shown to be important for.
- the cancer cells treated with the Antp-TPR peptide are annexin V positive and caspase 3, 7 positive. Further, as shown in FIG. Since the TPR peptide also caused survivin loss, the Antp-TPR peptide appears to cause significant killing of cancer cells dependent on survivin expression by an apoptotic mechanism.
- the newly designed peptide binds specifically to Hsp90, does not function alone, and chimerizes with a cell-penetrating peptide, so that when it is taken into cells, Since it exhibits cell-specific killing effects, particularly effective on cancer cells in which survivin is highly expressed, it can be greatly expected to be applied to novel therapeutic agents for cancer that is actually difficult to treat. It is thought that the side effect which is a problem in the treatment of cancer can be cleared because the peptide is greatly different from the method of targeting Hsp90 using a conventional compound and the actual effect on normal cells was not shown. It is done.
- Hsp90 TPR domain-binding peptide analog (amino acid sequence X 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X 10 X 11 X 12 ( SEQ ID NO: 1); wherein X 1 is , K, R or A; X 2 is A or G; X 3 is Y or L; X 4 is A or G; X 5 is R, A or K; X 6 is I or R; X 7 is G or A; X 8 is N or Q; X 9 is S or Y; X 10 is Y or S; X 11 is F or Y; Experiments were carried out to determine whether X 12 is K or R, or that an Antp-TPR long (Antp-RQIAKAYARIGNSYFKEEEKYK; SEQ ID NO: 39) with an extended TPR peptide can be used.
- SEQ ID NO: 9 RQKIKIWFQNRRMKWKKKAYARIGNSYFK (Antp-wild)
- SEQ ID NO: 10 RQKIKIWFQNRRMKWKKRAYARIGNSYFK (Antp-K1R)
- SEQ ID NO: 11 RQKIKIWFQNRRMKWKKAAYARIGNSYFK (Antp-K1A)
- SEQ ID NO: 14 RQKIKIWFQNRRMKWKKKAYGRIGNSYFK (Antp-A4G)
- SEQ ID NO: 15 RQKIKIWFQNRRMKWKKKAYGRIGNSYFK (Antp-A4G)
- Caki-1 American Type Culture Collection (Manassas, VA) was seeded in 3 ⁇ 10 3 cells, 96-well plate (Nunc TM ) per well, and 10% FBS (fetal bovine serum; Biowest) was added.
- the cells were cultured in the contained medium (DMEM (Nacalai Tesque)) for 24 hours and incubated with increasing concentrations of peptide in 100 ⁇ l for 48-72 hours at 37 ° C.
- the viability of the cells was measured using WST-8 solution (Cell At this time, it was compared with the wild-type Antp-TPR peptide.
- X 1 is an amino acid such as R or A of K or the same hydrophilic amino acid similar thereto, preferably K
- X 2 is an amino acid such as G, V, L, or I of an aliphatic side chain similar to A or the like
- X 3 is an amino acid such as Y or a hydrophobic amino acid L similar thereto, preferably Y
- X 4 is an amino acid such as G, V, L, or I of an aliphatic side chain similar to A or the like
- X 5 is R or a similar amino acid such as K or A, preferably R
- X 6 is an amino acid such as I or R similar thereto, preferably I (or I or A from another example)
- X 7 is an amino acid such as A found in G or other TPR domain
- X 4 is G; X 9 is Y; X 11 is Y; these preferred substitutions may be more effective in any combination.
- the killing effect is expected to be maintained even if a plurality of mutations that maintain the killing effect are combined.
- Antp-RAYAR SEQ ID NO: 65
- Antp-AAYAR SEQ ID NO: 66
- Antp-KGYAR SEQ ID NO: 67
- Antp-KALAR SEQ ID NO: 68
- Antp-KAYGR SEQ ID NO: 69
- Example 3 Testing of other cell-penetrating peptides
- the peptides used are as follows. All protocols were according to Example 1 except that the peptide sequence of the cell penetrating peptide was different.
- Antp-TPR long Antp-RQIAKAYARIGNSYFKEEEKYK; SEQ ID NO: 39
- R11 RRRRRRRRRRRR; SEQ ID NO: 7
- R11-TPR (RRRRRRRRRRRRRRKAYAARIGNSYFK; SEQ ID NO: 40) TAT-TPR (YGRKKRRQRRRRKAYARIGNSYFK; SEQ ID NO: 50) (result)
- FIG. 3D for TAT and in FIG. 6 and the following table for R11.
- R11-TPR also showed an effect equivalent to that of the wild type of Antp-TPR. Therefore, it can be said that R11 has a cell killing effect, although there are some differences in the effect.
- Antp-TPR long retained the wild type effect. Therefore, it was demonstrated that the anticancer activity was not lost even when the length was varied.
- TAT FIG. 3D
- an analog of a cell-permeable peptide (RQIKIWFQNRRMKWKK (SEQ ID NO: 5)) (amino acid sequence Y 1 Y 2 Y 3 Y 4 Y 5 Y 6 Y 7 Y 8 Y 9 Y 10 Y 11 Y 12 Y 13 Y 14 Y 15 Y 16 (SEQ ID NO: 8), wherein Y 1 is an amino acid such as R or a hydrophilic amino acid K similar thereto; Y 2 is an amino acid such as E as Q, N or Glx of an amide system similar thereto; Y 3 is an amino acid such as I or similar aliphatic L; Y 4 is an amino acid such as K or a similar hydrophilic amino acid R; Y 5 is an amino acid such as I or similar aliphatic L; Y 6 is an amino acid such as Y having W or an aromatic similar thereto; Y 7 is an amino acid
- a cell viability assay is performed, specifically a total of Caki-1 (American Type Culture Collection (Manassas, Va.)) 3 ⁇ 10 3 cells, 96-well plate (Nunc TM ) per well. And cultured for 24 hours in medium containing 10% FBS and incubated with increasing concentrations of peptide in 100 ⁇ l for 48-72 hours at 37 ° C. At this time, the cell viability is measured using a WST-8 solution (Cell Count Reagent SF; Nacalai Tesque, Inc.), and compared with the wild-type Antp-TPR peptide.
- K4R (SEQ ID NO: 26), Q8N (SEQ ID NO: 30), N9Q (SEQ ID NO: 31), R10K (SEQ ID NO: 32), R11K (SEQ ID NO: 33), M12C (SEQ ID NO: 34), K13R (SEQ ID NO: 35) ), K15R (SEQ ID NO: 37) and K16R (SEQ ID NO: 38) were observed to have an increased effect over the wild type.
- Q2N (SEQ ID NO: 24) and W14Y (SEQ ID NO: 36) were found to have almost the same effect as compared to the wild type. It was shown that the killing effect was maintained even with a small amount of mutations other than these. Therefore, it was demonstrated that the cancer cell killing effect of the present invention is maintained as long as cell permeability is maintained for the cell-penetrating peptide.
- Example 5 Treatment method
- application to actual treatment was confirmed.
- Atelocollagen (Koken) and Antp-TPR peptide are mixed (Antp-TPR peptide (SEQ ID NO: 9) is mixed so that atelocollagen is 0.3% in a concentration of 400 ⁇ g / ml), and the stabilization is HPLC.
- atelocollagen is 0.3% in a concentration of 400 ⁇ g / ml
- the stabilization is HPLC.
- the cancer reduction effect of the mice administered with the Antp-TPR peptide was observed with respect to the control group administered with PBS.
- the control group showed gradual tumor growth and on day 58 the tumor volume reached 749 mm 3 whereas Antp-TPR peptide (1 or 5 mg / kg) was administered intravenously.
- tumor growth was significantly suppressed.
- the mean tumor volume was 371 mm 3 in the 1 mg / kg administration group and 204 mm 3 in the 5 mg / kg administration group (P ⁇ 0.05 vs. control group mice).
- Antp-TPR peptide of the present invention effectively induces cancer cell death in vivo.
- mutants that showed the same effect as the Antp-TPR peptide in vitro are expected to show the same results in vivo. However, since it is expected to be about half, even if it has an effect of about half in vitro, it can be estimated to have an activity of 5 times or more that of conventional shepherdine in vivo. It is expected to have an activity superior to that of peptide anticancer agents.
- Example 6 Examination of cancer cell killing effect by FACS
- the cancer cell killing effect was examined for the purpose of confirming the specificity for cancer cells as the DDS of the present invention.
- Cancer cell T47D and normal cell HEK293T were cultured in a 6-well dish (Nunc TM ) for 24 hours in each medium, and then 68 ⁇ M Antp-TPR chimeric peptide was added and further cultured for 48 hours. After culture, each cell suspension is stained with propidium iodide (PI) or annexin V labeling (both Wako) and analyzed simultaneously for annexin V labeling and PI staining by multiparametric flow cytometry. did.
- PI propidium iodide
- annexin V labeling both Wako
- Antp-TPR peptide to normal cell HEK293T has no effect, but when the peptide is added to cancer cell T47D, an increase in the number of PI and annexin V positive or caspase 3, 7 positive cells is observed. From this, it can be seen that in the cancer cell T47D, the cell is killed by the addition of this peptide, or the dead cell seems to be undergoing apoptosis.
- Example 7 Use as a transfection reagent
- a TPR peptide or a TPR scramble peptide is mixed with a commercially available transfection reagent (Profect-P2 or Lipofectamine LTX) or the like, and allowed to stand at room temperature for 20 minutes to form liposomes. Caki-1 (kidney cancer cells)), and then the cell viability was measured using a WST-8 solution (Cell Count Reagent SF; Nacalai Tesque, Inc.) and only when the TPR scramble peptide and liposome were added. Compared.
- TPR peptide can be used as a factor for specific delivery (DDS).
- Example 8 Production of Hsp90 TRP-binding peptide-Antp chimeric peptide and measurement of biological activity
- the chimeric peptide of the present invention also exhibited a cell killing effect and an antitumor effect in blood cancer cells, particularly leukemia-derived cell lines.
- Cell line Human leukemia-derived cell lines: U937 (monoblastic leukemia), K562 (chronic myeloid leukemia), THP-1 (monocytic leukemia), HL-60 (myeloblastic leukemia), human normal B cells (RPMI1788) ) From the Human Science Foundation (Tokyo, Japan).
- Human embryonic kidney cell line (HEK293) was purchased from RIKEN Cell Bank (Tsukuba, Japan).
- Human lung normal epithelial cells (WI38) were purchased from American Type Culture Collection (Manassas, VA, USA).
- Human normal pancreatic epithelial cells (PE) were purchased from DS Pharma, Biomedical.
- the cells contain 10% FBS (BioWest, Miami, FL, USA), 100 ⁇ g / ml penicillin and 100 ⁇ g / ml streptomycin (Nacalai Tesque, Kyoto, Japan), RPMI 1640 (U937, K562, THP-1 HL-60, RPMI1788), CSC (PE), MEM (WI38) or D-MEM (HEK293).
- peptide The following peptides were purchased from Invitrogen, Carlsbad, CA, USA or synthesized on a peptide synthesizer (eg, Applied Biosystems, CA USA: Model 433A peptide synthesizer): Chimeric peptide Antp-TPR: RQKIKIWFQNRRMKWKK-KAYARIGNSYFK (SEQ ID NO: 9), RQKIKIWFQNRRMKWKKRAYARIGNSYFK (Antp-TPR K1R or Antp-K1R; SEQ ID NO: 10), RQKIKIWFQNRRMKWKKAAYARIGNSYFK (Antp-TPR K1A or Antp-K1A; SEQ ID NO: 11), RQKIKIWFQNRRMKWKKKGYARIGNSYFK (Antp-TPR A2G or Antp-A2G; SEQ ID NO: 12), RQIKIWFQNRRMKWKKALARIGNSY
- Cell viability assay A total of 3 ⁇ 10 3 cells per well were seeded in 96-well plates and incubated for 48-72 hours at 37 ° C. with peptides serially diluted in 100 ⁇ l in medium containing 10% FBS. Cell viability was measured using a WST-8 solution (Cell Count Reagent SF; Nacalai Tesque, Inc.).
- a 10% skim milk solution was prepared in phosphate buffered saline (PBS), blocked for 1 hour 30 minutes, and then reacted overnight with antibody solutions against Hsp90, Survivin, and actin (Stressgen Bioreagents, SIGMA), followed by secondary treatment. After reacting with an antibody (GE Healthcare, USA), chemical color was developed with an ECL kit (GE Health science), and the band was detected with a Las3000 system.
- PBS phosphate buffered saline
- TPR-TAMRA labeled
- PBMCs peripheral blood mononuclear leukocytes
- Flow cytometry assay To determine the cancer cell killing effect of 50 ⁇ M Antp-TPR chimeric peptide in leukemia cell line U937 cells, the peptide-treated cultures were analyzed by propidium iodide (PI) staining or multiparametric flow cytometry. Annexin V labeling and PI staining were analyzed simultaneously.
- PI propidium iodide
- the cells after the above treatment were further incubated for 15 minutes in a medium containing a fluorescent cation dye reagent JC-1, then washed with PBS, and then measured by multiparametric flow cytometry.
- caspase 3 and 7 For the measurement of caspase 3 and 7, similarly, the cells after the above treatment were subjected to a multi-step assay for caspase activity and propidium iodide (PI) staining using carboxyfluorescein FLICA caspase 3 and 7 assay (Immunochemistry Technologies, Bloomington, MN, USA). Measured by parametric flow cytometry.
- PI propidium iodide
- FIG. 11 and the following table show the cytotoxic activity by Antp-TPR as a result of the cell viability assay.
- a to (C) are leukemia cell lines (U937, K562, low molecular compounds Geldanamycin (A), 17-AAG (B), Antp-TPR chimeric peptide (C), which are Hsp90 inhibitors.
- DHP shows the cytocidal effect of the Antp-TPR chimeric peptide on solid cancer cell lines (BT20, OE19, MCF-7).
- the chimeric peptide Antp-TPR of the present invention has a cytocidal effect on acute myeloid leukemia cell lines, similarly to geldanamycin and 17-AAG, which are Hsap90 inhibitors. It was found that survivin was highly expressed in any of these cell lines that had a cytocidal effect. Moreover, it became clear from the result shown by FIG.11 (D) that the same cell killing mode as a solid cancer cell strain is shown.
- geldanamycin and 17-AAG showed a cell-killing effect on both normal cells and acute myeloid leukemia cell lines (both low IC 50 concentrations).
- the Antp-TPR chimeric peptide has little effect on normal cells, exhibits cell killing ability only in leukemia cell lines, and may affect leukemia cell lines in the IC 50 range of 20 ⁇ M to 60 ⁇ M.
- Table 8 Cell killing effect (IC 50 ) of Geldanamycin, 17-AAG, Antp-TPR chimeric peptide on normal cells and acute myeloid leukemia cell lines).
- TPR-TAMRA a TPR-TAMRA label
- Antp-TPR-TAMRA TAMRA label
- TAMRA-labeled Antp-TPR was confirmed to permeate into cells, but TPR peptide without Antp was not permeated into cells. .
- FIG. 13B since the inflow of calcein (green) is not observed even after the Antp-TPR chimeric peptide has permeated into the cell, the Antp-TPR chimeric peptide destroys the cell membrane. It was also found that it was transmitted without any problems. Furthermore, the membrane is not broken after the peptide has permeated. Each arrow in the figure indicates a cell through which the peptide has permeated.
- FIG. 14 shows the results of the flow cytometry assay.
- U937 cells were incubated with 50 ⁇ M Antp-TPR chimeric peptide overnight at 37 ° C., subjected to propidium iodide (PI) staining, and analyzed by multiparametric flow cytometry for Annexin V labeling and PI staining. ). For those treated with Antp-TPR, an increase in annexin V positive dead cells as seen in the upper right quadrant panel in the graph was observed.
- PI propidium iodide
- FIG. 14 (C) shows the results of analyzing the caspase activity and PI staining by multiparametric flow cytometry on U937 cells similarly treated with the chimeric peptide using carboxyfluorescein FLICA caspase 3,7 assay. .
- an increase in caspase 3 ⁇ ⁇ & 7 active cells as observed in the upper right quadrant panel in the graph was observed.
- the Antp-TPR chimeric peptide induces apoptosis of leukemia cell line U937 through the activation of caspases 3 and 7, and also causes changes in mitochondrial membrane potential. I understood that.
- Antp-A2G (SEQ ID NO: 2), Antp-I6A (SEQ ID NO: 52), Antp-G7A (SEQ ID NO: 17), Antp-N8Q (SEQ ID NO: 18), Antp-S9Y (SEQ ID NO: 19), Atnp-F11Y For (SEQ ID NO: 21), Antp-K12R (SEQ ID NO: 22) and Atnp-A2G, A4G, S9Y, F11Y (SEQ ID NO: 53), an increase in the effect was observed over the wild type.
- These peptides have even been found to have an activity increase of over 2000% when indexed by a decrease in cell viability.
- Antp-Y10S (SEQ ID NO: 20) was found to have almost the same effect as the wild type. It was shown that the killing effect was maintained even with a small amount of mutations other than these. Therefore, it was demonstrated that the cancer cell killing effect of the present invention is maintained as long as cell permeability is maintained for the cell-penetrating peptide. As an example, it has also been demonstrated that amino acid substitutions having similar properties such as conservative substitutions based on active peptides are effective.
- PBMCs peripheral blood mononuclear leukocytes
- Results are shown in FIG. 17 (A) and the table below. It was found that the Antp-TPR chimeric peptide has no cell-killing effect on mouse PBMCs or human normal B cells, and also has a cell-killing effect on mouse leukemia cell lines.
- TPR-TAMRA TAMRA label
- Antp-TPR-TAMRA TAMRA label
- the Antp-TPR chimeric peptide is also permeated into the mouse cell line, and even when permeated, it does not show a cytocidal effect on normal cell PBMCs. Since it shows a cell-killing effect, it was proved that blood cancer cells are peptides having normal and cancer cell selectivity as well as solid cancer cells.
- the present invention provides an anticancer drug with reduced side effects.
- SEQ ID NO: 1 shows the amino acid sequence X 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X 10 X 11 X 12 which is an Hsp90 TPR domain binding peptide.
- SEQ ID NO: 2 represents KAYARX a Xb Xc X d Z 1 Z 2 Z 3 which is a TRP domain binding peptide (where X a , X b , X c and X d are independently any amino acid) is there).
- SEQ ID NO: 3 shows KAYAR, which is an Hsp90 TPR domain binding peptide.
- SEQ ID NO: 4 shows KAYARIGNSYFK which is an Hsp90 TPR domain binding peptide (also referred to as TPR peptide).
- SEQ ID NO: 5 shows RQIKIWFQNRRMKWKK, which is an Antennapedia homeobox sequence (Antp).
- SEQ ID NO: 6 shows YGRKKRRQRRR which is TAT.
- SEQ ID NO: 7 shows RRRRRRRRRRR, also referred to as R11.
- SEQ ID NO: 8 shows the amino acid sequence Y 1 Y 2 Y 3 Y 4 Y 5 Y 6 Y 7 Y 8 Y 9 Y 10 Y 11 Y 12 Y 13 Y 14 Y 15 Y 16 which is a modified sequence of a cell-penetrating peptide .
- SEQ ID NO: 9 represents the chimeric peptide RQIKIWFQNRRMKWKKKAYARIGNSYFK (Antp-TPR wild) of the present invention.
- SEQ ID NO: 10 shows the chimeric peptide RQIKIWFQNRRMKWKKRAYARIGNSYFK (Antp-TPR K1R) of the present invention.
- SEQ ID NO: 11 shows the chimeric peptide RQIKIWFQNRRMKWKKAAYARIGNSYFK (Antp-TPR K1A) of the present invention.
- SEQ ID NO: 12 shows the chimeric peptide RQIKIWFQNRRMKWKKGYARIGNSYFK (Antp-TPR A2G) of the present invention.
- SEQ ID NO: 13 represents the chimeric peptide RQIKIWFQNRRMKWKKALARIGNSYFK of the present invention (Antp-TPR Y3L).
- SEQ ID NO: 14 shows the chimeric peptide RQIKIWFQNRRMKWKKKAYGRIGNSYFK (Antp-TPR A4G) of the present invention.
- SEQ ID NO: 15 represents the chimeric peptide RQIKIWFQNRRMKWKKKAYAKIGNSYFK (Antp-TPR R5K) of the present invention.
- SEQ ID NO: 16 shows the chimeric peptide RQIKIWFQNRRMKWKKKAYARRGNSYFK (Antp-TPR I6R) of the present invention.
- SEQ ID NO: 17 represents the chimeric peptide RQIKIWFQNRRMKWKKKAYARANSYFK (Antp-TPR G7A) of the present invention.
- SEQ ID NO: 18 represents the chimeric peptide RQIKIWFQNRRMKWKKKAYARIGQSYFK (Antp-TPR N8Q) of the present invention.
- SEQ ID NO: 19 represents the chimeric peptide RQIKIWFQNRRMKWKKKAYARINYYFK (Antp-TPR S9Y) of the present invention.
- SEQ ID NO: 20 shows the chimeric peptide RQIKIWFQNRRMKWKKYAYARGNSSFK (Antp-TPR Y10S) of the present invention.
- SEQ ID NO: 21 represents the chimeric peptide RQIKIWFQNRRMKWKKKAYARIGNSYYK (Antp-TPR F11Y) of the present invention.
- SEQ ID NO: 22 shows the chimeric peptide RQIKIWFQNRRMKWKKKAYARIGNSYFR (Antp-TPR K12R) of the present invention.
- SEQ ID NO: 23 represents the chimeric peptide KQIKIWFQNRRMKWKKKAYARIGNSYFK (AnR1K-TPR) of the present invention.
- SEQ ID NO: 24 shows the chimeric peptide RNIKIWFQNRRMKWKKKAYARIGNSYFK (AnQ2N-TPR) of the present invention.
- SEQ ID NO: 25 represents the chimeric peptide RQLKIWFQNRRMKWKKKAYARIGNSYFK (AnI3L-TPR) of the present invention.
- SEQ ID NO: 26 represents the chimeric peptide RQIRIWFQNRRMKWKKKAYARIGNSYFK (AnK4R-TPR) of the present invention.
- SEQ ID NO: 27 shows the chimeric peptide RQIKLWFQNRRMKWKKKAYARIGNSYFK (AnI5L-TPR) of the present invention.
- SEQ ID NO: 28 represents the chimeric peptide RQIKIYFQNRRMKWKKKAYARIGNSYFK (AnW6Y-TPR) of the present invention.
- SEQ ID NO: 29 shows the chimeric peptide RQIKIWYQNRRMKWKKKAYARIGNSYFK (AnF7Y-TPR) of the present invention.
- SEQ ID NO: 30 represents the chimeric peptide RQKIKIWFNNNRRMKWKKAYARIGNSYFK (AnQ8N-TPR) of the present invention.
- SEQ ID NO: 31 represents the chimeric peptide RQIKIWFQQRRMKWKKKAYARIGNSYFK (AnN9Q-TPR) of the present invention.
- SEQ ID NO: 32 shows the chimeric peptide RQIKIWFQNKRMKWKKKAYARIGNSYFK (AnR10K-TPR) of the present invention.
- SEQ ID NO: 33 shows the chimeric peptide RQIKIWFQNRKMKWKKKAYARIGNSYFK (AnR11K-TPR) of the present invention.
- SEQ ID NO: 34 shows the chimeric peptide RQIKIWFQNRRCKWKKKAYARIGNSYFK (AnM12C-TPR) of the present invention.
- SEQ ID NO: 35 represents the chimeric peptide RQIKIWFQNRRMRWKKKAYARIGNSYFK (AnK13R-TPR) of the present invention.
- SEQ ID NO: 36 represents the chimeric peptide RQIKIWFQNRRMKYKKKAYARIGNSYFK (AnW14Y-TPR) of the present invention.
- SEQ ID NO: 37 shows the chimeric peptide RQIKIWFQNRRMKWRKKAYARIGNSYFK (AnK15R-TPR) of the present invention.
- SEQ ID NO: 38 shows the chimeric peptide RQIKIWFQNRRMKWKRKAYARIGNSYFK (AnK16R-TPR) of the present invention.
- SEQ ID NO: 39 shows the chimeric peptide RQIKIWFQNRRMKWKKRQIAKAYARIGNSYFK (Antp-TPR long) of the present invention.
- SEQ ID NO: 40 represents the chimeric peptide RRRRRRRRRRKAYARIGNSYFK (R11-TPR) of the present invention.
- SEQ ID NO: 41 is an amino acid sequence in the TPR domain that binds to the C-terminal sequence of Hsp90 (EEVD (SEQ ID NO: 63)).
- SEQ ID NO: 42 represents the chimeric peptide RQIKIWFQNRRMKWKK-KAYAR (Antp-KAYAR) of the present invention.
- SEQ ID NO: 43 is RQIAKAYARIGNSYFKEEKYK with an extended TPR peptide.
- SEQ ID NO: 44 represents the chimeric peptide RQIKIWFQNRRMKWKK-KAYAAAGNNSTFK (Antp-mutant 1) of the present invention.
- SEQ ID NO: 45 shows the chimeric peptide RQIKIWFQNRRMKWKK-KAYARIGNSGGG (Antp-mutant 2) of the present invention.
- SEQ ID NO: 46 is the human Tom 70 sequence KALFRRAKAHEK.
- SEQ ID NO: 47 is the Tom 34 sequence KAFYRRQAHAK.
- SEQ ID NO: 48 is the sequence KGLFRRGEAHLA for FKBP52.
- SEQ ID NO: 49 is the sequence KALYRRQGWQG of CYP40.
- SEQ ID NO: 50 is the TAT-TPR sequence YGRKKRRQRRRRKAYARIGNSYFK.
- SEQ ID NO: 51 is the chimeric peptide RQIKIWFQNRRMKWKKYAYAIGSYFK (Antp-R5A) of the present invention.
- SEQ ID NO: 52 is the chimeric peptide RQIKIWFQNRRMKWKKKAYAARAGNSYFK (Antp-I6A) of the present invention.
- SEQ ID NO: 53 is the chimeric peptide RQIKIWFQNRRMKWKKKGRIGINYYYK (Antp-A2G, A4G, S9Y, F11Y) of the present invention.
- SEQ ID NO: 54 is the Antp-scrambled peptide RQIKIWFQNRRMKWKKRKFSAAIGYNKY.
- SEQ ID NO: 55 is the sequence of amino acids 719 to 732 at the C-terminus of human Hsp90: LEGDDDTSRMEEVD.
- SEQ ID NO: 56 is the sequence of amino acids 720 to 733 at the C-terminus of mouse Hsp90: LEGDDDTSRMEEVD.
- SEQ ID NO: 57 is the sequence of amino acids 720 to 733 at the C-terminus of rat Hsp90: LEGDDDTSRMEEVD.
- SEQ ID NO: 58 is the sequence of amino acids 720-733 at the C-terminus of bovine Hsp90: LEGDDDTSRMEEVD.
- SEQ ID NO: 59 is the sequence of the TPR2A domain (amino acids 296 to 325) of human HOP: YRQIAKAYARIGNSYFKEEEKYKDAIHFYNK.
- SEQ ID NO: 60 is the sequence of the TPR2A domain (amino acids 296 to 325) of mouse HOP: YRQIAKAYARIGNSYFKEEEKYKDAIHFYNK.
- SEQ ID NO: 61 is the sequence of the rat HOP TPR2A domain (amino acids 296-325): YRQIAKAYARIGNSYFKEERYKDAIHFYNK.
- SEQ ID NO: 62 is the sequence of the TPR2A domain (amino acids 296-325) of bovine HOP: YRQIAKAYARIGNSYFKEEEKYKDAIHFYNK.
- SEQ ID NO: 63 is the C-terminal sequence EEVD of Hsp90.
- SEQ ID NO: 64 is the C-terminal sequence MEEVD of Hsp90.
- SEQ ID NO: 65 is RQKIKIWFQNRRMKWKKRAYAR (Antp-RAYAR).
- SEQ ID NO: 66 is RQKIKIWFQNRRMKWKKAAYAR (Antp-AAYAR).
- SEQ ID NO: 67 is RQKIKIWFQNRRMKWKKKGYAR (Antp-KGYAR).
- SEQ ID NO: 68 is RQKIKIWFQNRRMKWKKALAR (Antp-KALAR).
- SEQ ID NO: 69 is RQKIKIWFQNRRMKWKKKAYGR (Antp-KAYGR).
- SEQ ID NO: 70 is KAYAAAGNSYTFK (TPR mutant (mutant) 1).
- SEQ ID NO: 71 is KAYARIGNSGGG (TPR mutant 2).
- Sequence number 72 is RKFSAAIGYNKY (scramble peptide (TPR scramble)).
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Abstract
Description
アミノ酸配列X1X2X3X4X5X6X7X8X9X10X11X12(配列番号1)を有するものであって、ここで
X1は、Kまたはそれに類似するアミノ酸であり;
X2は、Aまたはそれに類似するアミノ酸であり;
X3は、Yまたはそれに類似するアミノ酸であり;
X4は、Aまたはそれに類似するアミノ酸であり;
X5は、Rまたはそれに類似するアミノ酸であり;
X6は、Iまたはそれに類似するアミノ酸であり;
X7は、Gまたはそれに類似するアミノ酸であり;
X8は、Nまたはそれに類似するアミノ酸であり;
X9は、Sまたはそれに類似するアミノ酸であり;
X10は、Yまたはそれに類似するアミノ酸であり;
X11は、Fまたはそれに類似するアミノ酸であり;
X12は、Kまたはそれに類似するアミノ酸であるか、あるいは
TPRペプチドを延長させたRQIAKAYARIGNSYFKEEKYK(配列番号43)であり、
ここで、アミノ酸表記は1文字表記によるものである。
アミノ酸配列X1X2X3X4X5X6X7X8X9X10X11X12(配列番号1)を有するものであって、ここで
X1は、K、RまたはAであり(好ましくは、Kであり);
X2は、AまたはGであり;
X3は、YまたはLであり(好ましくは、Yであり);
X4は、AまたはGであり;
X5は、R、AまたはKであり(好ましくは、Rであり);
X6は、I、AまたはRであり(好ましくは、Rであり);
X7は、GまたはAであり;
X8は、NまたはQであり;
X9は、SまたはYであり;
X10は、YまたはSであり;
X11は、FまたはYであり;および/または
X12は、KまたはRであるか、あるいは
TPRペプチドを延長させたRQIAKAYARIGNSYFKEEKYK(配列番号43)である。
X2は、Gであり;
X4は、Gであり;
X7は、Aであり;
X4は、Qであり;
X9は、Yであり;
X10は、Sであり;
X11は、Yであり;および/または
X12は、Rである、ものを含む。
X4は、Gであり;
X9は、Yであり;
X11は、Yである、
ものを含む。
Y1は、Rまたはそれに類似するアミノ酸であり;
Y2は、Qまたはそれに類似するアミノ酸であり;
Y3は、Iまたはそれに類似するアミノ酸であり;
Y4は、Kまたはそれに類似するアミノ酸であり;
Y5は、Iまたはそれに類似するアミノ酸であり;
Y6は、Qまたはそれに類似するアミノ酸であり;
Y7は、Fまたはそれに類似するアミノ酸であり;
Y8は、Qまたはそれに類似するアミノ酸であり;
Y9は、Nまたはそれに類似するアミノ酸であり;
Y10は、Rまたはそれに類似するアミノ酸であり;
Y11は、Rまたはそれに類似するアミノ酸であり;
Y12は、Mまたはそれに類似するアミノ酸である、
Y13は、Kまたはそれに類似するアミノ酸である、
Y14は、Kまたはそれに類似するアミノ酸である、
Y15は、Kまたはそれに類似するアミノ酸である、
Y16は、Kまたはそれに類似するアミノ酸である、
を有するものである。
Y1は、RまたはKであり;
Y2は、QまたはNであり;
Y3は、IまたはLであり;
Y4は、KまたはRであり;
Y5は、IまたはLであり;
Y6は、WまたはYであり;
Y7は、FまたはYであり;
Y8は、QまたはNであり;
Y9は、NまたはQであり;
Y10は、RまたはKであり;
Y11は、RまたはKであり;
Y12は、MまたはCであり;
Y13は、KまたはRであり;
Y14は、WまたはYであり;
Y15は、KまたはRであり;および/または
Y16は、KまたはRである、
配列を有するものである。
Y2は、Nであり;
Y4は、Rであり;
Y8は、Nであり;
Y9は、Qであり;
Y10は、Kであり;
Y11は、Kであり;
Y12は、Cであり;
Y13は、Rであり;
Y14は、Yであり;
Y15は、Rであり;および/または
Y16は、Rである、
配列を有するものを包含する。
Y4は、Rであり;
Y9は、Qであり;
Y12は、Cであり;および/または
Y16は、Rである、
配列を有するものを包含する。
以下に本明細書において特に使用される用語の定義を列挙する。
X1は、Kまたはそれに類似する同じ親水性アミノ酸のR、Aなどのアミノ酸であり;
X2は、Aまたはそれに類似する脂肪族系側鎖のG、V、L、Iなどのアミノ酸であり;
X3は、Yまたはそれに類似する疎水性アミノ酸Lなどのアミノ酸であり;
X4は、Aまたはそれに類似する脂肪族系側鎖のG、V、L、Iなどのアミノ酸であり;
X5は、Rまたはそれに類似するアミノ酸であり;
X6は、Iまたはそれに類似するアミノ酸であり;
X7は、Gまたはそれに類似する他のTPRドメインで見受けられるAなどのアミノ酸であり;
X8は、Nまたはそれに類似する他のTPRドメインで見受けられるQなどのアミノ酸であり;
X9は、Sまたはそれに類似するOH基を有するT、Yなどのアミノ酸であり;
X10は、Yまたはそれに類似するOH基を有するS、Tなどのアミノ酸であり;
X11は、Fまたはそれに類似する芳香族を有するYなどのアミノ酸であり;
X12は、Kまたはそれに類似する塩基性のRなどのアミノ酸であり、X1~X12は任意の組み合わせ有効でありうることが理解される。
X1は、K、RまたはAであり、好ましくはKであり;
X2は、AまたはGであり;
X3は、YまたはLであり、好ましくはYであり;
X4は、AまたはGであり;
X5は、R、AまたはKであり、好ましくはRであり;
X6は、I、AまたはRであり、好ましくはIまたはAであり;
X7は、GまたはAであり;
X8は、NまたはQであり;
X9は、SまたはYであり;
X10は、YまたはSであり;
X11は、FまたはYであり;
X12は、KまたはRであるか、あるいは
TPRペプチドを延長させて得られる
RQIAKAYARIGNSYFKEEKYK(配列番号43)であり、X1~X12は任意の組み合わせ有効でありうることが理解される。
X2は、Gであり;
X4は、Gであり;
X7は、Aであり;
X4は、Qであり;
X9は、Yであり;
X10は、Sであり;
X11は、Yであり;
X12は、Rである、
ものを含み、これらの好ましい置換は任意の組み合わせが有効でありうることが理解される。本発明において、これらの置換によって、効果の維持または増強が見出されたからである。
X4は、Gであり;
X9は、Yであり;
X11は、Yである、
ものを含み、これらの好ましい置換は任意の組み合わせが有効でありうることが理解される。これらの置換によって、効果の増強が見出されたからである。
野生型に比べてほぼ同程度といえるもの:G7A,Y10S,K12R
野生型に比べて効果はあるが減少するものである:K1A,K1R,Y3L,R5K,R5A,I6R。
RQIKIWFQNRRMKWKK(配列番号5)またはその改変配列であって、該改変配列は、アミノ酸配列Y1Y2Y3Y4Y5Y6Y7Y8Y9Y10Y11Y12Y13Y14Y15Y16(配列番号8)を有するものであって、ここで
Y1は、Rまたはそれに類似する親水性アミノ酸Kなどのアミノ酸であり;
Y2は、Qまたはそれに類似するアミド系のN、Glx(本明細書において「Glx」とは、GlnおよびGluを包含して称する。)としてEなどのアミノ酸であり;
Y3は、Iまたはそれに類似する脂肪族系のLなどのアミノ酸であり;
Y4は、Kまたはそれに類似する親水性アミノ酸Rなどのアミノ酸であり;
Y5は、Iまたはそれに類似する脂肪族系のLなどのアミノ酸であり;
Y6は、Wまたはそれに類似する芳香族を有するYなどのアミノ酸であり;
Y7は、Fまたはそれに類似する芳香族を有するYなどのアミノ酸であり;
Y8は、Qまたはそれに類似するアミド系のN、GlxとしてEなどのアミノ酸であり;
Y9は、Nまたはそれに類似するアミド系のQなどのアミノ酸であり;
Y10は、Rまたはそれに類似する親水性アミノ酸Kなどのアミノ酸であり;
Y11は、Rまたはそれに類似する親水性アミノ酸Kなどのアミノ酸であり;
Y12は、Mまたはそれに類似するS含有アミノ酸のCなどのアミノ酸であり;
Y13は、Kまたはそれに類似する親水性アミノ酸Rなどのアミノ酸であり;
Y14は、Wまたはそれに類似する芳香族を有するYなどのアミノ酸であり;
Y15は、Kまたはそれに類似する親水性アミノ酸Rなどのアミノ酸であり;
Y16は、Kまたはそれに類似する親水性アミノ酸Rなどのアミノ酸である、
ものを有するものであり、Y1~Y16は任意の組み合わせ有効でありうることが理解される。
Y2は、QまたはNであり;
Y3は、IまたはLであり;
Y4は、KまたはRであり;
Y5は、IまたはLであり;
Y6は、WまたはYであり;
Y7は、FまたはYであり;
Y8は、QまたはNであり;
Y9は、NまたはQであり;
Y10は、RまたはKであり;
Y11は、RまたはKであり;
Y12は、MまたはCであり;
Y13は、KまたはRであり;
Y14は、WまたはYであり;
Y15は、KまたはRであり;
Y16は、KまたはRである、
配列を有するものであり、Y1~Y16は任意の組み合わせ有効でありうることが理解される。
Y4は、Rであり;
Y8は、Nであり;
Y9は、Qであり;
Y10は、Kであり;
Y11は、Kであり;
Y12は、Cであり;
Y13は、Rであり;
Y14は、Yであり;
Y15は、Rであり;および/または
Y16は、Rである、
配列を有するものを含み、これらの好ましい置換は任意の組み合わせ有効でありうることが理解される。これらの置換によって、効果の維持または増強が見出されたからである。
Y9は、Qであり;
Y12は、Cであり;あるいは
Y16は、Rである、
配列を有するものを含み、これらの好ましい置換は任意の組み合わせ有効でありうることが理解される。これらの置換によって、効果の増強が見出されたからである。
野生型に比べほぼ同程度のもの:Q2N,Q8N,R10K,R11K,K13R,W14Y,K15R
野生型に比べて効果は保持されるが減少するもの:R1K,I3L,I5L,W6Y,F7Y。
A:G、I、V、L
C:M(含Sアミノ酸)
D:N、QまたはE
E:N、QまたはD
F:Y、S、Aなど
G:A
H:Wなど
I:A、L、V、(G)
K:R
L:A、I、V、(G)
M:Sなど
N:E、DまたはQ
P:HyP
Q:N、EまたはD
R:K
S:T、Y
T:S、Y
V:I、L、A、(G)
W:H
Y:F、S、T。
アミノ酸配列X1X2X3X4X5X6X7X8X9X10X11X12(配列番号1)を有するものであって、ここで
X1は、Kまたはそれに類似する同じ親水性アミノ酸のR、Aなどのアミノ酸であり;
X2は、Aまたはそれに類似する脂肪族系側鎖のG、V、L、Iなどのアミノ酸であり;
X3は、Yまたはそれに類似する疎水性アミノ酸Lなどのアミノ酸であり;
X4は、Aまたはそれに類似する脂肪族系側鎖のG、V、L、Iなどのアミノ酸であり;
X5は、Rまたはそれに類似するアミノ酸であり;
X6は、Iまたはそれに類似するアミノ酸であり;
X7は、Gまたはそれに類似する他のTPRドメインで見受けられるAなどのアミノ酸であり;
X8は、Nまたはそれに類似する他のTPRドメインで見受けられるQなどのアミノ酸)であり;
X9は、Sまたはそれに類似するOH基を有するT、Yなどのアミノ酸であり;
X10は、Yまたはそれに類似するOH基を有するS、Tなどのアミノ酸であり;
X11は、Fまたはそれに類似する芳香族を有するYなどのアミノ酸であり;
X12は、Kまたはそれに類似する塩基性のRなどのアミノ酸である。
Y1は、Rまたはそれに類似する親水性アミノ酸Kなどのアミノ酸であり;
Y2は、Qまたはそれに類似するアミド系のN、GlxとしてEなどのアミノ酸であり;
Y3は、Iまたはそれに類似する脂肪族系のLなどのアミノ酸であり;
Y4は、Kまたはそれに類似する親水性アミノ酸Rなどのアミノ酸であり;
Y5は、Iまたはそれに類似する脂肪族系のLなどのアミノ酸であり;
Y6は、Wまたはそれに類似する芳香族を有するYなどのアミノ酸であり;
Y7は、Fまたはそれに類似する芳香族を有するYなどのアミノ酸であり;
Y8は、Qまたはそれに類似するアミド系のN、GlxとしてEなどのアミノ酸であり;
Y9は、Nまたはそれに類似するアミド系のQなどのアミノ酸であり;
Y10は、Rまたはそれに類似する親水性アミノ酸Kなどのアミノ酸であり;
Y11は、Rまたはそれに類似する親水性アミノ酸Kなどのアミノ酸であり;
Y12は、Mまたはそれに類似するS含有アミノ酸のCなどのアミノ酸であり;
Y13は、Kまたはそれに類似する親水性アミノ酸Rなどのアミノ酸であり;
Y14は、Wまたはそれに類似する芳香族を有するYなどのアミノ酸であり;
Y15は、Kまたはそれに類似する親水性アミノ酸Rなどのアミノ酸であり;
Y16は、Kまたはそれに類似する親水性アミノ酸Rなどのアミノ酸である、
を有するものであり得る。
本発明のペプチド(たとえば、キメラペプチド)は、当該分野で周知の方法(例えば、化学合成、以下に考察される一般的な工学技術)により得られ、または産生され得る。例えば、所望の領域もしくはドメインを含むペプチドの一部と一致するペプチドか、またはインビトロで所望の活性を媒介するペプチドは、ペプチド合成機の使用により合成され得る。ペプチドはまた、ペプチドの疎水性領域および親水性領域を同定するために使用され得る親水性分析(例えば、HoppおよびWoods、1981.Proc.Natl.Acad.Sci.USA 78:3824~3828を参照のこと)により分析され得、従って実験操作(例えば、結合実験、抗体合成)のための物質の設計において助けとなる。二次構造分析はまた、特定の構造的モチーフを確立するペプチドの領域を同定するために行われ得る(例えば、ChouおよびFasman、1974、Biochem 13:222~223を参照のこと)。操作、翻訳、二次構造の予想、親水性および疎水性プロファイル、オープンリーディングフレームの予想およびプロッティング、ならびに配列の相同性の決定は、当該分野で利用可能なコンピューターソフトプログラムを使用して達成され得る。構造分析の他の方法として、例えば、X線結晶解析(例えば、Engstrom、1974.Biochem Exp Biol 11:7~13を参照のこと));質量分析およびガスクロマトグラフィー(例えば、METHODS IN PROTEIN SCIENCE、1997.J.WileyおよびSons、NewYork、NYを参照のこと)が挙げられ、そしてコンピュータモデリング(例えば、FletterickおよびZoller、編、1986.Computer Graphics and Molecular Modeling:CURRENT COMMUNICATION IN MOLECULAR BIOLOGY、Cold Spring Harbor Laboratory Press、Cold Spring Harbor、NYを参照のこと)もまた使用され得る。
本発明の化合物または本発明の範囲内であるその製薬上許容される塩もしくは溶媒和は、そのまま単独で投与することも可能であるが、通常各種の医薬製剤として提供するのが好ましい。また、それら医薬製剤は、動物および人に使用される。
本明細書において「送達剤」または「送達媒体」とは、目的の物質の送達を媒介する担体(ビヒクル)をいう。送達される物質が薬物であれば、「薬物送達媒体」という。薬物送達システム(Drug Delivery System、DDS)とは、ドラッグデリバリーシステムとも呼ばれ、吸収制御型DDS、放出制御型DDS、標的指向型DDSに分類することもある。理想的なDDSは、薬物を「体内の必要な部位に」、「必要な量を」、「必要な時間だけ」送り込むシステムである。ターゲティングDDSは、パッシブ・ターゲティングDDSとアクティブ・ターゲティングDDSとに分類される。前者はキャリア(薬物運搬体)の粒子径や親水性など物理化学的性質を利用して体内挙動を制御する方法である。後者はこれらに特殊な仕組みを付け加えて積極的に標的組織への指向性を制御しようとする方法であり、例えば、標的組織を構成する特定細胞の標的分子への特異的分子認識機能を有する抗体(たとえば、本発明のTPR結合ペプチド)などを結合したキャリアを利用する方法があり「ミサイルドラッグ」と呼ばれることもある。
本発明のキメラペプチドが、固形がん細胞株において殺細胞効果、抗腫瘍効果を示すかどうかを検討した。
(細胞株)
ヒト乳がん細胞株(BT-20およびT47D)、肺がん細胞株(H322およびH460)、前立腺がん細胞株(LNCap)、神経膠腫細胞株(U251)、腎臓がん細胞株(Caki-1)および肺線維芽細胞の細胞株(MRC-5)を、American Type Culture Collection(Manassas,VA)から購入した。ヒト膵臓がん細胞株(BXPC-3)を、Europiean Collection of Cell Cultures(ECACC;Salisbury,Wiltshire,UK)から購入した。ヒト胚性腎臓細胞株(HEK293)を、RIKEN Cell Bank(つくば市)から購入した。細胞は、10% FBS(BioWest,Miami,FL)、100μg/ml ペニシリンおよび100μg/ml ストレプトマイシン(ナカライテスク株式会社、京都市)を含有する、RPMI 1640(BT-20、T47D、H322、H460、LNCap、U251およびBXPC-3)、MEM(MARC-5)またはD-MEM(HEK293、Caki-1)中で培養した。
以下のペプチドをInvitrogen,Carlsbad,CAから購入したか、あるいは、ペプチド合成機(たとえば、Applied Biosystems:Model 433A ペプチドシンセサイザ)で合成した。
1.キメラペプチド:RQIKIWFQNRRMKWKK-KAYARIGNSYFK(Antp-TPR wild;配列番号9)
ここで、RQIKIWFQNRRMKWKK(配列番号5)は、本明細書においてAntennapedia homeodomain sequence(Antp)と称することがある。
2.キメラペプチド:RQIKIWFQNRRMKWKK-KAYAR(配列番号42)
3.ペプチド:KAYARIGNSYFK(TPRペプチド;配列番号4)
4.キメラペプチド:RQIKIWFQNRRMKWKK-KAYAAAGNSYTFK(Mutant 1;配列番号44)
5.キメラペプチド:RQIKIWFQNRRMKWKK-KAYARIGNSGGG(Mutant 2;配列番号45)
また、以下も合成した。
RQIKIWFQNRRMKWKKRAYARIGNSYFK(Antp-TPR K1R;配列番号10)、
RQIKIWFQNRRMKWKKAAYARIGNSYFK(Antp-TPR K1A;配列番号11)、
RQIKIWFQNRRMKWKKKGYARIGNSYFK(Antp-TPR A2G;配列番号12)、
RQIKIWFQNRRMKWKKKALARIGNSYFK(Antp-TPR Y3L;配列番号13)、
RQIKIWFQNRRMKWKKKAYGRIGNSYFK(Antp-TPR A4G;配列番号14)、
RQIKIWFQNRRMKWKKKAYAKIGNSYFK(Antp-TPR R5K;配列番号15)、
RQIKIWFQNRRMKWKKKAYARRGNSYFK(Antp-TPR I6R;配列番号16)、
RQIKIWFQNRRMKWKKKAYARIANSYFK(Antp-TPR G7A;配列番号17)、
RQIKIWFQNRRMKWKKKAYARIGQSYFK(Antp-TPR N8Q;配列番号18)、
RQIKIWFQNRRMKWKKKAYARIGNYYFK(Antp-TPR S9Y;配列番号19)、
RQIKIWFQNRRMKWKKKAYARIGNSSFK(Antp-TPR Y10S;配列番号20)、
RQIKIWFQNRRMKWKKKAYARIGNSYYK(Antp-TPR F11Y;配列番号21)、
RQIKIWFQNRRMKWKKKAYARIGNSYFR(Antp-TPR K12R;配列番号22)。
また、細胞溶解性に関する変異のものも合成した。
KQIKIWFQNRRMKWKKKAYARIGNSYFK(AnR1K-TPR;配列番号23)、
RNIKIWFQNRRMKWKKKAYARIGNSYFK(AnQ2N-TPR;配列番号24)、
RQLKIWFQNRRMKWKKKAYARIGNSYFK(AnI3L-TPR;配列番号25)、
RQIRIWFQNRRMKWKKKAYARIGNSYFK(AnK4R-TPR;配列番号26)、
RQIKLWFQNRRMKWKKKAYARIGNSYFK(AnI5L-TPR;配列番号27)、
RQIKIYFQNRRMKWKKKAYARIGNSYFK(AnW6Y-TPR;配列番号28)、
RQIKIWYQNRRMKWKKKAYARIGNSYFK(AnF7Y-TPR;配列番号29)、
RQIKIWFNNRRMKWKKKAYARIGNSYFK(AnQ8N-TPR;配列番号30)、
RQIKIWFQQRRMKWKKKAYARIGNSYFK(AnN9Q-TPR;配列番号31)、
RQIKIWFQNKRMKWKKKAYARIGNSYFK(AnR10K-TPR;配列番号32)、
RQIKIWFQNRKMKWKKKAYARIGNSYFK(AnR11K-TPR;配列番号33)、
RQIKIWFQNRRCKWKKKAYARIGNSYFK(AnM12C-TPR;配列番号34)、
RQIKIWFQNRRMRWKKKAYARIGNSYFK(AnK13R-TPR;配列番号35)、
RQIKIWFQNRRMKYKKKAYARIGNSYFK(AnW14Y-TPR;配列番号36)、
RQIKIWFQNRRMKWRKKAYARIGNSYFK(AnK15R-TPR;配列番号37)、
RQIKIWFQNRRMKWKRKAYARIGNSYFK(AnK16R-TPR;配列番号38)、
RQIKIWFQNRRMKWKKRQIAKAYARIGNSYFK(Antp-TPR slong;配列番号39)、
RRRRRRRRRRRKAYARIGNSYFK(R11-TPR;配列番号40)
これらのペプチドを、化学的に合成し、そして、高速液体クロマトグラフィーにより精製して、その後、水に溶解した。
1ウェルあたり合計3×103細胞を、96ウェルプレートに播種し、10% FBSを含有する培地中で24時間培養し、100μlにおいて漸増濃度のペプチドと共に、37℃にて48~72時間インキュベートした。細胞の生存率を、WST-8溶液(Cell Count Reagent SF;ナカライテスク株式会社)を用いて測定した。
Antp-TPRペプチドががん細胞においてアポトーシスを誘導するかどうかを検討するために、アネキシンVまたはカスパーゼ3,7およびヨウ化プロピジウム(PI)の二重染色を用いて、フローサイトメトリーアッセイを行った。
がん細胞T47Dおよび正常細胞のHEK293Tをそれぞれの培地で6-wellディッシュ(NuncTM)で24時間培養した後、68μMのAntp-TPRキメラペプチドを添加してさらに24時間培養した。培養後、それぞれの細胞懸濁液に対して、ヨウ化プロピジウム(PI)染色、アネキシンV標識(いずれもWako)、あるいは、カスパーゼ3,7標識を行いマルチパラメトリックフローサイトメトリーによって、アネキシンV標識またはカスパーゼ3,7標識およびPI染色について、同時に解析した。
結果を図9に示す。正常細胞HEK293TにAntp-TPRペプチドを加えても影響を与えないが、がん細胞T47Dにペプチドを加えた場合、アネキシンV陽性またはカスパーゼ3,7陽性の細胞集団の増加が観察された。
BIACOREバイオセンサーシステム3000(BIACORE Inc,Uppsala,Sweden)を用いて、表面プラズモン共鳴(SPR)実験を行った。製造業者の説明書にしたがって、N-ヒドロキシスクシンイミドおよびN-エチル-N’-(ジメチルアミノプロピル)カルボジイミド活性化化学により約5000RUのHsp90をCM5センサーチップの表面に固定した。非特異的な結合のコントロールとしてなにも固定していないセンサーチップの反応していないカルボキシメチル基を、エタノールアミンでブロックした。アッセイの間に非特異的な結合を防ぐために、HBS緩衝液(0.01M HEPES、0.15M NaCl、0.005% Tween 20、3mM EDTA[pH7.4])を泳動緩衝液として用いた。組換えヒトHsp90のTPR結合ドメイン-細胞溶解性ペプチドキメラペプチドとの相互作用解析を、以下のように行った:上述のように、約5000RUのHsp90をCM5のセンサーチップ上に固定し、次いで、いくつかの濃度のペプチドをこのセンサーチップの上に注入した。これらの実験において用いた全てのタンパク質濃度は、Bradford法(Bradford MM.A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding.Anal Biochem 1976;72:248-54)により決定した。データの解析は、BIA evaluation ver.3.2ソフトウェア(BIACORE)を用いて行った。
細胞殺傷効果の見受けられたがん細胞と正常細胞をそれぞれの培地で6-well(NuncTM)で24時間培養した後、上清をリン酸緩衝化緩衝液(PBS)で最低二回洗浄後、Cell lysis buffer(Promega)をそれぞれのウェルに300ulずつ添加し、細胞を溶解、これを細胞抽出総タンパク質(total protein)とした。この抽出液をSDS-PAGEで分離した後、セミドライ法でメンブレンに転写した。10%スキムミルク溶液をリン酸緩衝化緩衝液(PBS)で調製し、1時間30分ブロッキングした後、Hsp90、Hsp70、サービビン(survivin)、アクチン(actin)に対する抗体液(Stressgen Bioreagents,SIGMA)中で一晩反応させ、その後、二次抗体(GE Healthcare)と反応させたのち、ECLキット(GE Health science)で化学発色させ、Las3000 systemでバンドを検出した。
新規に設計されたペプチド配列の野生型は、RQIKIWFQNRRMKWKK-KAYARIGNSYFK(配列番号9)である。ここで、N末端側のペプチドは、細胞透過性ペプチドAntpであり、C末端側のペプチドは、図1(A)に示されるように、TPRペプチド(HopのTPR2Aドメイン内にあるHsp90のC末端側に結合するのに重要なへリックスの一部分の配列。)に結合する、Hsp90 TRP結合ペプチドである。
図3および以下の表に、その結果としてAntp-TPRならびに、Antp-TPR変異体ペプチドによる細胞障害活性を示す。
設計したTPRペプチドが、サービビンを含むいくつかのがん原性タンパク質のがん細胞における正確なフォールディングに必須なHsp90とHopのTPR2Aドメインとの相互作用と特異的に競合できるかどうかを検討した。図7および以下の表は、センサーチップ上に固定化されたヒトHopのTPR2Aドメインタンパク質に対して、前もってHsp90とTPRペプチド、TPR scramble、TPR mutant 1、あるいはTPR mutant 2ペプチドをそれぞれ混合させておき、Hsp90に十分に結合させておいてからTPR2Aとの相互作用を確認することで、阻害効果を確認した実験である。センサーグラムとグラフで示されるように、TPRペプチドではその濃度増加によりHsp90とTPR2Aとの相互作用に影響を与える(図7AおよびC)が、TPR scramble、TPR mutant 1、あるいはTPR mutant 2ペプチドでは高濃度を前もって添加しておいてもその完全阻害は見受けられない(図7BおよびC)。
Antp-TPRペプチドを細胞に添加した後のHsp90クライアントタンパク質のレベルを検討したところ、Antp-TPRで処理したT47D細胞は、サービビン、CDK4およびAktを含む複数のHspクライアントペプチドの消失を示した。対照的に、Antp-TPRペプチドは、Hsp90自体のレベルには影響しなかった(図4(A))。これらの結果は、今回設計したAntp-TPRペプチドが、Hsp90クライアントタンパク質の正確なフォールディングに必須のコシャペロン補充と競合することによってがん細胞における細胞生存経路に影響を及ぼすようである。
特に殺傷効果が高かった細胞に関して、ウェスタンブロッティングにより各Hsp90クライアントタンパク質の発現量を調べたところ、図4(B)に示すようにサービビンの発現量が特に多いことが判明した。このことから、今回新規に設計したペプチドががん細胞の中でも特にサービビンの発現量が多いものに効果的であることが判明した。
以上のように、今回新規に設計したペプチドは、Hsp90に特異的に結合すること、単独では機能せず、細胞透過性ペプチドとキメラ化することで、細胞内に取り込まれたときに、がん細胞特異的に殺傷効果を示すこと、特にサービビンが高発現しているがん細胞に効果的であることから、実際に治療が困難ながんの新規治療薬への応用が大いに期待できる。従来の化合物を用いてHsp90を標的とした手法と大きく異なりペプチドを用いていることと、正常細胞に実際に影響を示さなかったことから、がんの治療で問題となる副作用もクリアできることが考えられる。今後は、上記配列のアミノ酸を一つずつ置換すること、あるいは他の細胞透過性ペプチドとの組み合わせを試みることにより、今回設計された配列よりもさらにがん細胞特異的であり、殺傷能力の強い配列を設計できることが大いに期待できる。さらに、このようなペプチドを組み合わせた新規治療薬は、がんだけでなく、ペプチドを用いて炎症性サイトカイン等を抑制することにより、炎症性疾患、間質性肺炎などの難治性疾患にも大いに応用できることが期待される。
(実施例2:TRPドメイン結合ペプチドの網羅的解析)
本実施例では、Hsp90 TPRドメイン結合ペプチドのアナログ(アミノ酸配列X1X2X3X4X5X6X7X8X9X10X11X12(配列番号1);式中
X1は、K、RまたはAであり;
X2は、AまたはGであり;
X3は、YまたはLであり;
X4は、AまたはGであり;
X5は、R、AまたはKであり;
X6は、IまたはRであり;
X7は、GまたはAであり;
X8は、NまたはQであり;
X9は、SまたはYであり;
X10は、YまたはSであり;
X11は、FまたはYであり;
X12は、KまたはRであるか、あるいは
TPRペプチドを延長させたAntp-TPR slong(Antp-RQIAKAYARIGNSYFKEEKYK;配列番号39)ものが使用可能であるかどうかを決定するための実験を行った。また、TPRに代えてR11を使用したものを用いた実験も行った。
配列番号9:RQIKIWFQNRRMKWKKKAYARIGNSYFK(Antp-wild)
配列番号10:RQIKIWFQNRRMKWKKRAYARIGNSYFK(Antp-K1R)
配列番号11:RQIKIWFQNRRMKWKKAAYARIGNSYFK(Antp-K1A)
配列番号12:RQIKIWFQNRRMKWKKKGYARIGNSYFK(Antp-A2G)
配列番号13:RQIKIWFQNRRMKWKKKALARIGNSYFK(Antp-Y3L)
配列番号14:RQIKIWFQNRRMKWKKKAYGRIGNSYFK(Antp-A4G)
配列番号15:RQIKIWFQNRRMKWKKKAYAKIGNSYFK(Antp-R5K)
配列番号16:RQIKIWFQNRRMKWKKKAYARRGNSYFK(Antp-I6R)
配列番号17:RQIKIWFQNRRMKWKKKAYARIANSYFK(Antp-G7A)
配列番号18:RQIKIWFQNRRMKWKKKAYARIGQSYFK(Antp-N8Q)
配列番号19:RQIKIWFQNRRMKWKKKAYARIGNYYFK(Antp-S9Y)
配列番号20:RQIKIWFQNRRMKWKKKAYARIGNSSFK(Antp-Y10S)
配列番号21:RQIKIWFQNRRMKWKKKAYARIGNSYYK(Antp-F11Y)
配列番号22:RQIKIWFQNRRMKWKKKAYARIGNSYFR(Antp-K12R)
(プロトコール)
それぞれの変異体ペプチドに関して、細胞生存性アッセイを行った。具体的には1ウェルあたり合計Caki-1(American Type Culture Collection(Manassas,VA)を3×103細胞、96ウェルプレート(NuncTM)に播種し、10% FBS(ウシ胎仔血清;Biowest)を含有する培地(DMEM(ナカライテスク株式会社))中で24時間培養し、100μlにおいて漸増濃度のペプチドと共に、37℃にて48~72時間インキュベートした。細胞の生存率を、WST-8溶液(Cell Count Reagent SF;ナカライテスク株式会社)を用いて測定するこの時に、野生型のAntp-TPRペプチドと比較した。
結果を図5および以下の表に示す。表中の数値野生型を100%としたときの相対値を示す。
アミノ酸配列X1X2X3X4X5X6X7X8X9X10X11X12(配列番号1);
X1は、Kまたはそれに類似する同じ親水性アミノ酸のR、Aなどのアミノ酸であり、好ましくは、Kであり、;
X2は、Aまたはそれに類似する脂肪族系側鎖のG、V、L、Iなどのアミノ酸であり;
X3は、Yまたはそれに類似する疎水性アミノ酸Lなどのアミノ酸であり、好ましくは、Yであり、;
X4は、Aまたはそれに類似する脂肪族系側鎖のG、V、L、Iなどのアミノ酸であり;
X5は、Rまたはそれに類似するK、Aなどのアミノ酸であり、好ましくはRであり;
X6は、Iまたはそれに類似するRなどのアミノ酸であり、好ましくはI(または別途実施例からIもしくはAであり);
X7は、Gまたはそれに類似する他のTPRドメインで見受けられるAなどのアミノ酸であり;
X8は、Nまたはそれに類似する他のTPRドメインで見受けられるQなどのアミノ酸であり;
X9は、Sまたはそれに類似するOH基を有するT、Yなどのアミノ酸であり;
X10は、Yまたはそれに類似するOH基を有するS、Tなどのアミノ酸であり;
X11は、Fまたはそれに類似する芳香族を有するYなどのアミノ酸であり;
X12は、Kまたはそれに類似する塩基性のRなどのアミノ酸である。
本実施例では、Antpペプチド以外の細胞透過性ペプチドが使用可能か調べた。
YGRKKRRQRRR(TAT 配列番号6)
RRRRRRRRRRR(R11 配列番号7)
製造した配列は、以下のとおりである。
TAT-TPR(YGRKKRRQRRRKAYARIGNSYFK;配列番号50)
(結果)
TATについては、図3Dに、R11については、図6および以下の表にその結果を示す。R11-TPRについてもAntp-TPRの野生型と同等の効果を示したことから、R11でも効果の多少の違いはあれ、細胞殺傷効果があるといえる。Antp-TPR slongは、野生型の効果を保持した。したがって、長さを変動させても、抗がん活性は消失しないことが実証された。また、TATでも同様の効果が示された(図3D)ことから、TPRの前に、細胞透過性ペプチドを組み合わせることで、効果を発揮できるペプチドであることを証明できたといえ、本発明の汎用性が立証された。
本実施例では、細胞透過性ペプチド(RQIKIWFQNRRMKWKK(配列番号5))のアナログ(アミノ酸配列Y1Y2Y3Y4Y5Y6Y7Y8Y9Y10Y11Y12Y13Y14Y15Y16(配列番号8)を有するものであって、ここで
Y1は、Rまたはそれに類似する親水性アミノ酸Kなどのアミノ酸であり;
Y2は、Qまたはそれに類似するアミド系のN、GlxとしてEなどのアミノ酸であり;
Y3は、Iまたはそれに類似する脂肪族系のLなどのアミノ酸であり;
Y4は、Kまたはそれに類似する親水性アミノ酸Rなどのアミノ酸であり;
Y5は、Iまたはそれに類似する脂肪族系のLなどのアミノ酸であり;
Y6は、Wまたはそれに類似する芳香族を有するYなどのアミノ酸であり;
Y7は、Fまたはそれに類似する芳香族を有するYなどのアミノ酸であり;
Y8は、Qまたはそれに類似するアミド系のN、GlxとしてEなどのアミノ酸であり;
Y9は、Nまたはそれに類似するアミド系のQなどのアミノ酸であり;
Y10は、Rまたはそれに類似する親水性アミノ酸Kなどのアミノ酸であり;
Y11は、Rまたはそれに類似する親水性アミノ酸Kなどのアミノ酸であり;
Y12は、Mまたはそれに類似するS含有アミノ酸のCなどのアミノ酸である、
Y13は、Kまたはそれに類似する親水性アミノ酸Rなどのアミノ酸である、
Y14は、Wまたはそれに類似する芳香族を有するYなどのアミノ酸である、
Y15は、Kまたはそれに類似する親水性アミノ酸Rなどのアミノ酸である、
Y16は、Kまたはそれに類似する親水性アミノ酸Rなどのアミノ酸であるものである)を使用することができるかどうかを調べた。ペプチド配列が異なること以外は、すべてのプロトコールは実施例1に準じた。
それぞれの変異体ペプチドに関して、細胞生存性アッセイを行う、具体的には1ウェルあたり合計Caki-1(American Type Culture Collection(Manassas,VA))を3×103細胞、96ウェルプレート(NuncTM)に播種し、10% FBSを含有する培地中で24時間培養し、100μlにおいて漸増濃度のペプチドと共に、37℃にて48~72時間インキュベートした。細胞の生存率を、WST-8溶液(Cell Count Reagent SF;ナカライテスク株式会社)を用いて測定するこの時に、野生型のAntp-TPRペプチドと比較する。
結果を図8Aおよび以下の表に示す。表中の数値は、野生型を100%としたときの相対値を示す。
本実施例では、実際の治療への応用を確認した。
アテロコラーゲン(atelocollagen;高研)とAntp-TPRペプチドを混合して(Antp-TPRペプチド(配列番号9)400μg/ml濃度中にアテロコラーゲンが0.3%になるように混合)、その安定化をHPLCで測定する、具体的には、ペプチドのみの波形を測定し、アテロコラーゲンとペプチドの混合物を測定したときに、ペプチドの位置の波形が時間ごとにどの程度検出されるかで、アテロコラーゲンからの放出の度合いを知ることができると同時に、ペプチドの安定性を確認することができる。また混合物を下記のように作成した固形がんを移植した動物に投与することで、その治療効果を検討した。
ヒトすい臓がん細胞(Bxpc3)、5.0×106個の細胞をリン酸緩衝化生理食塩水(PBS)150μlに懸濁し、ヌードマウス(BALB/c Slc-nu/nu)に皮下移植した。5日後、固形がんに対してAntp-TPRペプチドを1mg/kg-5mg/kgの濃度で150μlずつPBSに懸濁し固形がんに一日おきに計9回局所投与してその縮小効果を検討した。腫瘍径は、カリパスを用いて測定し、そして、腫瘍容積(mm3)は、式:長径(mm)×短径(mm)2×0.5を用いて計算した。
ヒトすい臓がん細胞(Bxpc3)、5.0×106個の細胞をリン酸緩衝化生理食塩水(PBS)150μlに懸濁し、7~9週齢のヌードマウス(Balb/c Slc-nu/nu)(体重17~21g)の側腹部領域に皮下移植した。腫瘍容積が20~50mm3に到達した時点でマウスを無作為に3群(n=6/群)に分け、そして、PBS(コントロール)またはAntp-TPR(1または5mg/kg)を、週に3回、計9回静脈内注射(50μl/注射)して、腫瘍の縮小効果を検討した。腫瘍径の測定および腫瘍容積の計算は、局所投与の場合と同様にして行った。
結果を図8B(局所投与による抗腫瘍効果)および図8C(静脈内投与による抗腫瘍効果)に示す。
本実施例では、本発明のDDSとしてのがん細胞に対する特異性を確認する目的で、がん細胞殺傷効果を検討した。
がん細胞T47Dおよび正常細胞のHEK293Tをそれぞれの培地で6-wellディッシュ(NuncTM)で24時間培養した後、68μMのAntp-TPRキメラペプチドを添加してさらに48時間培養した。培養後、それぞれの細胞懸濁液に対して、ヨウ化プロピジウム(PI)染色、あるいは、アネキシンV標識(いずれもWako)を行いマルチパラメトリックフローサイトメトリーによって、アネキシンV標識およびPI染色について、同時に解析した。
結果を図9に示す。正常細胞HEK293TにAntp-TPRペプチドを加えても影響を与えないが、がん細胞T47Dにペプチドを加えた場合、アネキシンV陽性またはカスパーゼ3,7陽性の細胞集団の増加が観察された。
TPRペプチドあるいは、TPR scrambleペプチドを市販のtransfection試薬(Profect-P2あるいは、Lipofectamine LTX)などと混合して、20分常温で静置して、リポソームを形成し、その後この複合体をがん細胞(Caki-1(腎臓がん細胞))に添加、その後、細胞の生存率をWST-8溶液(Cell Count Reagent SF;ナカライテスク株式会社)を用いて測定しTPR scrambleペプチドおよびリポソームのみ添加の場合と比較した。
結果を図10および以下の表に示す。図10からも明らかなように、リポソーム単独およびTPR scrambleでは効果がなく、TPRペプチドを導入した場合のみ、殺傷効果が見受けられた。
本発明のキメラペプチドが、血液がん細胞、特に、白血病由来細胞株においても同様に殺細胞効果、抗腫瘍効果を示すかどうかを検討した。
(細胞株)
ヒト白血病由来細胞株:U937(単芽球性白血病)、K562(慢性骨髄性白血病)、THP-1(単球性白血病)、HL-60(骨髄芽球性白血病)、ヒト正常B細胞(RPMI1788)をヒューマンサイエンス振興財団(東京、日本)から購入した。ヒト胚性腎臓細胞株(HEK293)を、RIKEN Cell Bank(つくば市、日本)から購入した。ヒト肺正常上皮細胞(WI38)をAmerican Type Culture Collection(Manassas,VA,USA)から購入した。ヒト正常すい臓上皮細胞(PE)をDSファーマ、バイオメディカルから購入した。細胞は、10% FBS(BioWest,Miami,FL,USA)、100μg/ml ペニシリンおよび100μg/ml ストレプトマイシン(ナカライテスク株式会社、京都市、日本)を含有する、RPMI 1640(U937、K562、THP-1、HL-60、RPMI1788)、CSC(PE)、MEM(WI38)またはD-MEM(HEK293)中で培養した。
以下のペプチドをInvitrogen,Carlsbad,CA,USAから購入したか、あるいは、ペプチド合成機(たとえば、Applied Biosystems,CA USA:Model 433A ペプチドシンセサイザ)で合成した:
キメラペプチドAntp-TPR:RQIKIWFQNRRMKWKK-KAYARIGNSYFK(配列番号9)、
RQIKIWFQNRRMKWKKRAYARIGNSYFK(Antp-TPR K1RまたはAntp-K1R;配列番号10)、
RQIKIWFQNRRMKWKKAAYARIGNSYFK(Antp-TPR K1AまたはAntp-K1A;配列番号11)、
RQIKIWFQNRRMKWKKKGYARIGNSYFK(Antp-TPR A2GまたはAntp-A2G;配列番号12)、
RQIKIWFQNRRMKWKKKALARIGNSYFKを(Antp-TPR Y3LまたはAntp-Y3L;配列番号13)、
RQIKIWFQNRRMKWKKKAYGRIGNSYFK(Antp-TPR A4GまたはAntp-A4G;配列番号14)、
RQIKIWFQNRRMKWKKKAYAKIGNSYFK(Antp-TPR R5KまたはAntp-R5K;配列番号15)、
RQIKIWFQNRRMKWKKKAYARRGNSYFK(Antp-TPR I6RまたはAntp-I6R;配列番号16)、
RQIKIWFQNRRMKWKKKAYARIANSYFK(Antp-TPR G7AまたはAntp-G7A;配列番号17)、
RQIKIWFQNRRMKWKKKAYARIGQSYFK(Antp-TPR N8QまたはAntp-N8Q;配列番号18)、
RQIKIWFQNRRMKWKKKAYARIGNYYFK(Antp-TPR S9YまたはAntp-S9Y;配列番号19)、
RQIKIWFQNRRMKWKKKAYARIGNSSFK(Antp-TPR Y10SまたはAntp-Y10S;配列番号20)、
RQIKIWFQNRRMKWKKKAYARIGNSYYK(Antp-TPR F11YまたはAntp-F11Y;配列番号21)、
RQIKIWFQNRRMKWKKKAYARIGNSYFR(Antp-TPR K12RまたはAntp-K12R;配列番号22)、
RQIAKAYARIGNSYFKEEKYK(延長型TPRペプチド;配列番号43)、
RQIKIWFQNRRMKWKKKAYAAIGNSYFK(Antp-R5A;配列番号51)、
RQIKIWFQNRRMKWKKKAYARAGNSYFK(Antp-I6A;配列番号52)、
RQIKIWFQNRRMKWKKKGYGRIGNYYYK(Antp-A2G,A4G,S9Y,F11Y;配列番号53)、
RQIKIWFQNRRMKWKKRKFSAAIGYNKY(Antp-スクランブルペプチド;配列番号54)。
1ウェルあたり合計3×103細胞を、96ウェルプレートに播種し、10% FBSを含有する培地中に、100μlにおいて段階希釈したペプチドと共に、37℃にて48~72時間インキュベートした。細胞の生存率を、WST-8溶液(Cell Count Reagent SF;ナカライテスク株式会社)を用いて測定した。
白血病細胞株をそれぞれの培地で6-well(NuncTM)で24時間培養した後、上清をリン酸緩衝化緩衝液(PBS)で最低二回洗浄後、Cell lysis buffer(Promega)をそれぞれのウェルに300ulずつ添加し、細胞を溶解、これを細胞抽出総タンパク質(total protein)とした。この抽出液をSDS-PAGEで分離した後、セミドライ法でメンブレンに転写した。10%スキムミルク溶液をリン酸緩衝化緩衝液(PBS)で調製し、1時間30分ブロッキングした後、Hsp90,サービビン,アクチンに対する抗体液(Stressgen Bioreagents,SIGMA)で一晩反応させ、その後、二次抗体(GE Healthcare,USA)を反応させたのち、ECLキットで(GE Health science)で化学発色させ、Las3000 systemでバンドを検出した。
U937細胞、マウス白血病細胞株EL4、または、マウス末梢血から調整された末梢血単核白血球細胞(Peripheral blood mononuclear cells:PBMCs)、1×106細胞に対して、TPR-TAMRA(TAMRA標識体)あるいは、Antp-TPR-TAMRA(TAMRA標識体)を用いて、最終濃度10μMになるように添加し、一時間培養したのち、細胞内に取り込まれたペプチドの様子あるいは、ペプチド透過による細胞への培地の流入をカルセインを培地に添加したものを用いて、コンフォーカル顕微鏡(Olympus FV1000(Olympus))を用いて観察した。
白血病細胞株U937細胞の50μMのAntp-TPRキメラペプチドによるがん細胞殺傷効果を決定するために、ペプチドで処理した培養物を、ヨウ化プロピジウム(PI)染色、あるいは、マルチパラメトリックフローサイトメトリーによって、アネキシンV標識およびPI染色について、同時に解析した。
図11および以下の表に、細胞生存性アッセイの結果としてAntp-TPRによる細胞障害活性を示す。
各白血病細胞株(U937、K562、THP-1、HL-60)に関して、ウェスタンブロッティングにより各タンパク質(Hsp90、サービビン、βアクチン(コントロール))の発現量を調べたところ、図12に示されるように、U937およびTHP-1においてサービビンの発現量が多いことが判明した。このことから、Antp-TPRキメラペプチドは、白血病細胞株においても、固形がん細胞と同様、サービビンの発現量が多いものに効果的であることが分かった。
U937細胞1×106細胞に対して、TPR-TAMRA(TAMRA標識体)あるいはAntp-TPR-TAMRA(TAMRA標識体)を、最終濃度10μMになるように添加し、一時間培養したのち、細胞内に取り込まれたペプチドの様子あるいは、ペプチド透過による細胞への培地の流入を、カルセイン含有培地を用いて、コンフォーカル顕微鏡(Olympus FV1000(Olympus))を用いて観察した。
図14にフローサイトメトリーアッセイの結果を示す。
U937細胞をAntp-TPRキメラペプチドとともに一晩37℃でインキュベートし、その後、細胞抽出液に対して、それぞれ示されるタンパク質に対する抗体でウェスタンブロッティングを行った。図15に示されるように、Antp-TPR(+)では、Antp-TPR(-)よりも各タンパク質の発現量が減少しており、Antp-TPRキメラペプチドが、白血病細胞株U937に対して、Hsp90のクライアントタンパク質のフォールディングに影響を与えていることが予想され、そしてその結果、各タンパク質の減退が起こっていることが分かった。
図16に示すアミノ酸変異を導入したキメラペプチドの各々について、U937に対する殺細胞効果を調べた。その結果、それぞれの位置に保存的アミノ酸の変異を導入してもなお、殺細胞能力を有していることが分かった。また、以下の表には、野生型の数値を100%としたときの相対値を示す。また、評価のために、細胞生存率の低下を数値化したもの、およびがん細胞を死傷させた比率を数値化した抗がん活性を提示する。野生型より強いものについては、細胞生存率の低下を検討することで、よりその抗がん剤としての活性の改善が評価されうる。
マウスの末梢血から採取した正常リンパ球を含む末梢血単核白血球細胞(Peripheral blood mononuclear cells:PBMCs)、ヒト正常B細胞、マウスの白血病細胞株EL4に対して、Antp-TPRキメラペプチドの殺細胞効果を検討した。
マウス白血病細胞株EL4、またはマウス末梢血単核白血球細胞(Peripheral blood mononuclear cells:PBMCs)1×106細胞に対して、TPR-TAMRA(TAMRA標識体)あるいはAntp-TPR-TAMRA(TAMRA標識体)を、最終濃度10μMになるように添加し、一時間培養したのち、細胞内に取り込まれたペプチドの様子あるいは、ペプチド透過による細胞への培地の流入を、カルセイン含有培地を用いて、コンフォーカル顕微鏡(Olympus FV1000(Olympus))を用いて観察した。
配列番号2は、TRPドメイン結合ペプチドであるKAYARXaXbXcXdZ1Z2Z3を示す(ここで、Xa、Xb、XcおよびXdは独立して任意のアミノ酸である)。
配列番号3は、Hsp90 TPRドメイン結合ペプチドであるKAYARを示す。
配列番号4は、Hsp90 TPRドメイン結合ペプチド(TPRペプチドとも称する)であるKAYARIGNSYFKを示す。
配列番号5は、アンテナペディアホメオボックス配列(Antp)であるRQIKIWFQNRRMKWKKを示す。
配列番号6は、TATであるYGRKKRRQRRRを示す。
配列番号7は、R11とも称するRRRRRRRRRRRを示す。
配列番号8は、細胞透過性ペプチドの改変配列であるアミノ酸配列Y1Y2Y3Y4Y5Y6Y7Y8Y9Y10Y11Y12Y13Y14Y15Y16を示す。
配列番号9は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKAYARIGNSYFK(Antp-TPR wild)を示す。
配列番号10は、本発明のキメラペプチドRQIKIWFQNRRMKWKKRAYARIGNSYFK(Antp-TPR K1R)を示す。
配列番号11は、本発明のキメラペプチドRQIKIWFQNRRMKWKKAAYARIGNSYFK(Antp-TPR K1A)を示す。
配列番号12は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKGYARIGNSYFK(Antp-TPR A2G)を示す。
配列番号13は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKALARIGNSYFKを(Antp-TPR Y3L)示す。
配列番号14は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKAYGRIGNSYFK(Antp-TPR A4G)を示す。
配列番号15は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKAYAKIGNSYFK(Antp-TPR R5K)を示す。
配列番号16は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKAYARRGNSYFK(Antp-TPR I6R)を示す。
配列番号17は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKAYARIANSYFK(Antp-TPR G7A)を示す。
配列番号18は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKAYARIGQSYFK(Antp-TPR N8Q)を示す。
配列番号19は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKAYARIGNYYFK(Antp-TPR S9Y)を示す。
配列番号20は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKAYARIGNSSFK(Antp-TPR Y10S)を示す。
配列番号21は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKAYARIGNSYYK(Antp-TPR F11Y)を示す。
配列番号22は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKAYARIGNSYFR(Antp-TPR K12R)を示す。
配列番号23は、本発明のキメラペプチドKQIKIWFQNRRMKWKKKAYARIGNSYFK(AnR1K-TPR)を示す。
配列番号24は、本発明のキメラペプチドRNIKIWFQNRRMKWKKKAYARIGNSYFK(AnQ2N-TPR)を示す。
配列番号25は、本発明のキメラペプチドRQLKIWFQNRRMKWKKKAYARIGNSYFK(AnI3L-TPR)を示す。
配列番号26は、本発明のキメラペプチドRQIRIWFQNRRMKWKKKAYARIGNSYFK(AnK4R-TPR)を示す。
配列番号27は、本発明のキメラペプチドRQIKLWFQNRRMKWKKKAYARIGNSYFK(AnI5L-TPR)を示す。
配列番号28は、本発明のキメラペプチドRQIKIYFQNRRMKWKKKAYARIGNSYFK(AnW6Y-TPR)を示す。
配列番号29は、本発明のキメラペプチドRQIKIWYQNRRMKWKKKAYARIGNSYFK(AnF7Y-TPR)を示す。
配列番号30は、本発明のキメラペプチドRQIKIWFNNRRMKWKKKAYARIGNSYFK(AnQ8N-TPR)を示す。
配列番号31は、本発明のキメラペプチドRQIKIWFQQRRMKWKKKAYARIGNSYFK(AnN9Q-TPR)を示す。
配列番号32は、本発明のキメラペプチドRQIKIWFQNKRMKWKKKAYARIGNSYFK(AnR10K-TPR)を示す。
配列番号33は、本発明のキメラペプチドRQIKIWFQNRKMKWKKKAYARIGNSYFK(AnR11K-TPR)を示す。
配列番号34は、本発明のキメラペプチドRQIKIWFQNRRCKWKKKAYARIGNSYFK(AnM12C-TPR)を示す。
配列番号35は、本発明のキメラペプチドRQIKIWFQNRRMRWKKKAYARIGNSYFK(AnK13R-TPR)を示す。
配列番号36は、本発明のキメラペプチドRQIKIWFQNRRMKYKKKAYARIGNSYFK(AnW14Y-TPR)を示す。
配列番号37は、本発明のキメラペプチドRQIKIWFQNRRMKWRKKAYARIGNSYFK(AnK15R-TPR)を示す。
配列番号38は、本発明のキメラペプチドRQIKIWFQNRRMKWKRKAYARIGNSYFK(AnK16R-TPR)を示す。
配列番号39は、本発明のキメラペプチドRQIKIWFQNRRMKWKKRQIAKAYARIGNSYFK(Antp-TPR slong)を示す。
配列番号40は、本発明のキメラペプチドRRRRRRRRRRRKAYARIGNSYFK(R11-TPR)を示す。
配列番号41は、Hsp90のC末端配列(EEVD(配列番号63))に結合するTPRドメイン内のアミノ酸配列であるALKEKELGNDAYKKKDFDTALKHYDKAKELDPTNMTYITNQAAVYFEKGDYNKCRELCEKAIEVGRENREDYRQIAKAYARIGNSYFKEEKYKDAIHFYNKSLAEHRTPDVLKKCQQAEKILKEQERLAを示す。
配列番号42は、本発明のキメラペプチドRQIKIWFQNRRMKWKK-KAYAR(Antp-KAYAR)を示す。
配列番号43は、TPRペプチドを延長させたRQIAKAYARIGNSYFKEEKYKである。
配列番号44は、本発明のキメラペプチドRQIKIWFQNRRMKWKK-KAYAAAGNSYTFK(Antp-変異体(mutant)1)を示す。
配列番号45は、本発明のキメラペプチドRQIKIWFQNRRMKWKK-KAYARIGNSGGG(Antp-変異体(mutant)2)を示す。
配列番号46は、human Tom 70の配列KALFRRAKAHEKである。
配列番号47は、Tom 34の配列KAFYRRAQAHAKである。
配列番号48は、FKBP52の配列KGLFRRGEAHLAである。
配列番号49は、CYP40の配列KALYRRAQGWQGである。
配列番号50は、TAT-TPRの配列YGRKKRRQRRRKAYARIGNSYFKである。
配列番号51は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKAYAAIGNSYFK(Antp-R5A)である。
配列番号52は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKAYARAGNSYFK(Antp-I6A)である。
配列番号53は、本発明のキメラペプチドRQIKIWFQNRRMKWKKKGYGRIGNYYYK(Antp-A2G,A4G,S9Y,F11Y)である。
配列番号54は、Antp-スクランブルペプチドRQIKIWFQNRRMKWKKRKFSAAIGYNKYである。
配列番号55は、ヒトHsp90のC末端のアミノ酸719~732の配列:LEGDDDTSRMEEVDである。
配列番号56は、マウスHsp90のC末端のアミノ酸720~733の配列:LEGDDDTSRMEEVDである。
配列番号57は、ラットHsp90のC末端のアミノ酸720~733の配列:LEGDDDTSRMEEVDである。
配列番号58は、ウシHsp90のC末端のアミノ酸720~733の配列:LEGDDDTSRMEEVDである。
配列番号59は、ヒトHOPのTPR2Aドメイン(アミノ酸296~325)の配列:YRQIAKAYARIGNSYFKEEKYKDAIHFYNKである。
配列番号60は、マウスHOPのTPR2Aドメイン(アミノ酸296~325)の配列:YRQIAKAYARIGNSYFKEEKYKDAIHFYNKである。
配列番号61は、ラットHOPのTPR2Aドメイン(アミノ酸296~325)の配列:YRQIAKAYARIGNSYFKEERYKDAIHFYNKである。
配列番号62は、ウシHOPのTPR2Aドメイン(アミノ酸296~325)の配列:YRQIAKAYARIGNSYFKEEKYKDAIHFYNKである。
配列番号63は、Hsp90のC末端配列EEVDである。
配列番号64は、Hsp90のC末端配列MEEVDである。
配列番号65は、RQIKIWFQNRRMKWKKRAYAR(Antp-RAYAR)である。
配列番号66は、RQIKIWFQNRRMKWKKAAYAR(Antp-AAYAR)である。
配列番号67は、RQIKIWFQNRRMKWKKKGYAR(Antp-KGYAR)である。
配列番号68は、RQIKIWFQNRRMKWKKKALAR(Antp-KALAR)である。
配列番号69は、RQIKIWFQNRRMKWKKKAYGR(Antp-KAYGR)である。
配列番号70は、KAYAAAGNSYTFK(TPR 変異体(mutant)1)である。
配列番号71は、KAYARIGNSGGG(TPR 変異体(mutant)2)である。
配列番号72は、RKFSAAIGYNKY(スクランブルペプチド(TPR scramble))である。
Claims (58)
- Hsp90 TPR(tetratricopeptide repeat)ドメイン結合ペプチドと、細胞透過性ペプチドとを有するキメラペプチド。
- 前記Hsp90 TPRドメイン結合ペプチドは、アミノ酸配列KAYARIGNSYFK(配列番号4;ここで、アルファベットは、アミノ酸の1文字表示である。)またはその改変配列を有するものである、請求項1に記載のキメラペプチド。
- 前記Hsp90 TPRドメイン結合ペプチドは、
アミノ酸配列X1X2X3X4X5X6X7X8X9X10X11X12(配列番号1)を有するものであって、ここで
X1は、Kまたはそれに類似するアミノ酸であり;
X2は、Aまたはそれに類似するアミノ酸であり;
X3は、Yまたはそれに類似するアミノ酸であり;
X4は、Aまたはそれに類似するアミノ酸であり;
X5は、Rまたはそれに類似するアミノ酸であり;
X6は、Iまたはそれに類似するアミノ酸であり;
X7は、Gまたはそれに類似するアミノ酸であり;
X8は、Nまたはそれに類似するアミノ酸であり;
X9は、Sまたはそれに類似するアミノ酸であり;
X10は、Yまたはそれに類似するアミノ酸であり;
X11は、Fまたはそれに類似するアミノ酸であり;
X12は、Kまたはそれに類似するアミノ酸であるか、あるいは
RQIAKAYARIGNSYFKEEKYK(配列番号43)であり、
ここで、アミノ酸表記は1文字表記によるものである、
請求項1に記載のキメラペプチド。 - 前記Hsp90 TPRドメイン結合ペプチドは、
アミノ酸配列X1X2X3X4X5X6X7X8X9X10X11X12(配列番号1)を有するものであって、ここで
X1は、Kであり;
X2は、AまたはGであり;
X3は、YまたはLであり;
X4は、AまたはGであり;
X5は、RまたはAであり;
X6は、IまたはAであり;
X7は、GまたはAであり;
X8は、NまたはQであり;
X9は、SまたはYであり;
X10は、YまたはSであり;
X11は、FまたはYであり;
X12は、KまたはRであるか、あるいは
RQIAKAYARIGNSYFKEEKYK(配列番号43)である、
請求項3に記載のキメラペプチド。 - 前記Hsp90 TPRドメイン結合ペプチドにおいて、
X2は、Gであり;
X4は、Gであり;
X7は、Aであり;
X4は、Qであり;
X9は、Yであり;
X10は、Sであり;
X11は、Yであり;または
X12は、Rである、
ものを含む、
請求項3に記載のキメラペプチド。 - 前記Hsp90 TPRドメイン結合ペプチドにおいて、
X4は、Gであり;
X9は、Yであり;または
X11は、Yである、
ものを含む、
請求項3に記載のキメラペプチド。 - 前記Hsp90 TPRドメイン結合ペプチドは、アミノ酸配列KAYAR(配列番号3)を有するものである、請求項1に記載のキメラペプチド。
- 前記Hsp90 TRPドメイン結合ペプチドは、アミノ酸配列KAYARXaXbXcXdZ1Z2Z3(配列番号2)を有するものであって、ここで、Xa、Xb、XcおよびXdは独立して任意のアミノ酸であり、Z1Z2Z3はヘリックスを形成、維持するのに重要なアミノ酸である、請求項1に記載のキメラペプチド。
- Z1はYまたはHであり、Z2はF、E、M、LまたはSであり、Z3はK、A、L、QまたはSである、
前記Z1Z2Z3は、(Y/H)(F/E/M/L/S)(K/A/L/Q/S)である、請求項7に記載のキメラペプチド。 - 前記Hsp90 TPRドメイン結合ペプチドは、KAYAR(配列番号3)またはKAYARIGNSYFK(配列番号4)である、請求項1に記載のキメラペプチド
- 前記細胞透過性ペプチドは、アンテナペディアホメオボックス配列(Antp)であるRQIKIWFQNRRMKWKK(配列番号5)、TATであるYGRKKRRQRRR(配列番号6)、またはRRRRRRRRRRR(配列番号7)あるいはそれらの改変配列である、請求項1に記載のキメラペプチド。
- 前記細胞透過性ペプチドは、RQIKIWFQNRRMKWKK(配列番号5)またはその改変配列であって、該改変配列は、アミノ酸配列Y1Y2Y3Y4Y5Y6Y7Y8Y9Y10Y11Y12Y13Y14Y15Y16(配列番号8)を有するものであって、ここで
Y1は、Rまたはそれに類似するアミノ酸であり;
Y2は、Qまたはそれに類似するアミノ酸であり;
Y3は、Iまたはそれに類似するアミノ酸であり;
Y4は、Kまたはそれに類似するアミノ酸であり;
Y5は、Iまたはそれに類似するアミノ酸であり;
Y6は、Wまたはそれに類似するアミノ酸であり;
Y7は、Fまたはそれに類似するアミノ酸であり;
Y8は、Qまたはそれに類似するアミノ酸であり;
Y9は、Nまたはそれに類似するアミノ酸であり;
Y10は、Rまたはそれに類似するアミノ酸であり;
Y11は、Rまたはそれに類似するアミノ酸であり;
Y12は、Mまたはそれに類似するアミノ酸であり;
Y13は、Kまたはそれに類似するアミノ酸であり;
Y14は、Wまたはそれに類似するアミノ酸であり;
Y15は、Kまたはそれに類似するアミノ酸であり;
Y16は、Kまたはそれに類似するアミノ酸である、
配列を有するものである、請求項1に記載のキメラペプチド。 - 前記細胞透過性ペプチドは、RQIKIWFQNRRMKWKK(配列番号5)またはその改変配列であって、該改変配列は、アミノ酸配列Y1Y2Y3Y4Y5Y6Y7Y8Y9Y10Y11Y12Y13Y14Y15Y16(配列番号8)を有するものであって、ここで
Y1は、RまたはKであり;
Y2は、QまたはNであり;
Y3は、IまたはLであり;
Y4は、KまたはRであり;
Y5は、IまたはLであり;
Y6は、WまたはYであり;
Y7は、FまたはYであり;
Y8は、QまたはNであり;
Y9は、NまたはQであり;
Y10は、RまたはKであり;
Y11は、RまたはKであり;
Y12は、MまたはCであり;
Y13は、KまたはRであり;
Y14は、WまたはYであり;
Y15は、KまたはRであり;
Y16は、KまたはRである、
配列を有するものである、請求項12に記載のキメラペプチド。 - 前記細胞透過性ペプチドにおいて
Y2は、Nであり;
Y4は、Rであり;
Y8は、Nであり;
Y9は、Qであり;
Y10は、Kであり;
Y11は、Kであり;
Y12は、Cであり;
Y13は、Rであり;
Y14は、Yであり;
Y15は、Rであり;または
Y16は、Rである、
配列を有するものである、請求項12に記載のキメラペプチド。 - 前記細胞透過性ペプチドにおいて
Y4は、Rであり;
Y9は、Qであり;
Y12は、Cであり;または
Y16は、Rである、
配列を有するものである、請求項12に記載のキメラペプチド。 - RQIKIWFQNRRMKWKKKAYARIGNSYFK(配列番号9)、
RQIKIWFQNRRMKWKKRAYARIGNSYFK(配列番号10)、
RQIKIWFQNRRMKWKKAAYARIGNSYFK(配列番号11)、
RQIKIWFQNRRMKWKKKGYARIGNSYFK(配列番号12)、
RQIKIWFQNRRMKWKKKALARIGNSYFK(配列番号13)、
RQIKIWFQNRRMKWKKKAYGRIGNSYFK(配列番号14)、
RQIKIWFQNRRMKWKKKAYAKIGNSYFK(配列番号15)、
RQIKIWFQNRRMKWKKKAYARRGNSYFK(配列番号16)、
RQIKIWFQNRRMKWKKKAYARIANSYFK(配列番号17)、
RQIKIWFQNRRMKWKKKAYARIGQSYFK(配列番号18)、
RQIKIWFQNRRMKWKKKAYARIGNYYFK(配列番号19)、
RQIKIWFQNRRMKWKKKAYARIGNSSFK(配列番号20)、
RQIKIWFQNRRMKWKKKAYARIGNSYYK(配列番号21)、
RQIKIWFQNRRMKWKKKAYARIGNSYFR(配列番号22)、
KQIKIWFQNRRMKWKKKAYARIGNSYFK(配列番号23)、
RNIKIWFQNRRMKWKKKAYARIGNSYFK(配列番号24)、
RQLKIWFQNRRMKWKKKAYARIGNSYFK(配列番号25)、
RQIRIWFQNRRMKWKKKAYARIGNSYFK(配列番号26)、
RQIKLWFQNRRMKWKKKAYARIGNSYFK(配列番号27)、
RQIKIYFQNRRMKWKKKAYARIGNSYFK(配列番号28)、
RQIKIWYQNRRMKWKKKAYARIGNSYFK(配列番号29)、
RQIKIWFNNRRMKWKKKAYARIGNSYFK(配列番号30)、
RQIKIWFQQRRMKWKKKAYARIGNSYFK(配列番号31)、
RQIKIWFQNKRMKWKKKAYARIGNSYFK(配列番号32)、
RQIKIWFQNRKMKWKKKAYARIGNSYFK(配列番号33)、
RQIKIWFQNRRCKWKKKAYARIGNSYFK(配列番号34)、
RQIKIWFQNRRMRWKKKAYARIGNSYFK(配列番号35)、
RQIKIWFQNRRMKYKKKAYARIGNSYFK(配列番号36)、
RQIKIWFQNRRMKWRKKAYARIGNSYFK(配列番号37)、
RQIKIWFQNRRMKWKRKAYARIGNSYFK(配列番号38)、
RQIKIWFQNRRMKWKKRQIAKAYARIGNSYFK(配列番号39)、または
RRRRRRRRRRRKAYARIGNSYFK(配列番号40)、の配列を有するものである、請求項1に記載のキメラペプチド - 請求項1~16のいずれかに記載のキメラペプチドをコードする核酸。
- 請求項1~16のいずれかに記載のキメラペプチドをコードする核酸を含むベクター。
- 請求項1~16のいずれかに記載のキメラペプチドをコードする核酸を含む細胞。
- 請求項1~16に記載のキメラペプチドを含む医薬組成物。
- 請求項1~16に記載のキメラペプチドを含む抗がん剤。
- 前記がんは、固形がんおよび血液がんを含む、請求項21に記載の抗がん剤。
- 前記がんは、固形がんである、請求項21に記載の抗がん剤。
- 前記がんは、血液がんである、請求項21に記載の抗がん剤。
- 請求項1~16に記載のキメラペプチドの、医薬組成物の製造のための使用。
- 請求項1~16に記載のキメラペプチドの、抗がん剤の製造のための使用。
- 前記がんは、固形がんおよび血液がんを含む、請求項26に記載の使用。
- 前記がんは、固形がんである、請求項26に記載の使用。
- 前記がんは、血液がんである、請求項26に記載の使用。
- 請求項1~16に記載のキメラペプチドを投与する工程を包含する治療方法。
- 請求項1~16に記載のキメラペプチドを投与する工程を包含するがんの治療方法。
- 前記がんは、固形がんおよび血液がんを含む、請求項31に記載の治療方法。
- 前記がんは、固形がんである、請求項31に記載の治療方法。
- 前記がんは、血液がんである、請求項31に記載の治療方法。
- Hsp90のTPRドメイン内のアミノ酸配列を用いる、医薬のスクリーニング方法。
- 前記Hsp90のC末端配列(EEVD)に結合するTPRドメイン内のアミノ酸配列は、ALKEKELGNDAYKKKDFDTALKHYDKAKELDPTNMTYITNQAAVYFEKGDYNKCRELCEKAIEVGRENREDYRQIAKAYARIGNSYFKEEKYKDAIHFYNKSLAEHRTPDVLKKCQQAEKILKEQERLA(配列番号41)である、請求項35に記載のスクリーニング方法。
- Hsp90のTPRドメイン内のアミノ酸配列を用いる、抗がん剤のスクリーニング方法。
- 前記がんは、固形がんおよび血液がんを含む、請求項37に記載のスクリーニング方法。
- 前記がんは、固形がんである、請求項37に記載のスクリーニング方法。
- 前記がんは、血液がんである、請求項37に記載のスクリーニング方法。
- 前記Hsp90のC末端配列(EEVD)に結合するTPRドメイン内のアミノ酸配列は、ALKEKELGNDAYKKKDFDTALKHYDKAKELDPTNMTYITNQAAVYFEKGDYNKCRELCEKAIEVGRENREDYRQIAKAYARIGNSYFKEEKYKDAIHFYNKSLAEHRTPDVLKKCQQAEKILKEQERLA(配列番号41)である、請求項35または36に記載のスクリーニング方法。
- Hsp90 TPR(tetratricopeptide repeat)ドメイン結合ペプチドおよび目的物質を含む、がん細胞の調節のための組成物。
- 前記がんは、固形がんおよび血液がんを含む、請求項42に記載の組成物。
- 前記がんは、固形がんである、請求項42に記載の組成物。
- 前記がんは、血液がんである、請求項42に記載の組成物。
- 前記目的物質は、抗がん剤である、請求項42に記載の組成物。
- 前記Hsp90 TPRドメイン結合ペプチドは、ビヒクル上に存在するものである、請求項42に記載の組成物。
- 前記ビヒクルは、リポソームである、請求項42に記載の組成物。
- Hsp90 TPRドメイン結合ペプチドを含む、目的物質のがん細胞への送達剤。
- 前記Hsp90 TPRドメイン結合ペプチドと前記目的物質とが互いに結合してまたは結合しないで含まれる、請求項49に記載の送達剤。
- 前記Hsp90 TPRドメイン結合ペプチドと前記目的物質とが互いに結合した融合物質である、請求項49に記載の送達剤。
- 前記融合物質はペプチドである、請求項49に記載の送達剤。
- 前記Hsp90 TPRドメイン結合ペプチドと前記目的物質とが互いに結合しないで分散して含まれる、請求項49に記載の送達剤。
- 前記Hsp90 TPRドメイン結合ペプチドは、ビヒクル上に含まれる、請求項49に記載の送達剤。
- 前記ビヒクルは、リポソームである、請求項54に記載の送達剤。
- 前記Hsp90 TPRドメイン結合ペプチドは、ビヒクル上に含まれ、前記目的物質は、ビヒクル内に含まれる、請求項49に記載の送達剤。
- 前記ビヒクルは、リポソームである、請求項56に記載の送達剤。
- 標的結合ペプチドと細胞殺傷性の溶解性ペプチド成分とを含むペプチド毒素。
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|---|---|---|---|
| US13/129,350 US8546320B2 (en) | 2008-11-14 | 2009-11-13 | Hsp9O-targeted anti-cancer chimeric peptide |
| JP2010537823A JP5700409B2 (ja) | 2008-11-14 | 2009-11-13 | Hsp90を標的にした新規抗がんキメラペプチド |
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| JP2008-292849 | 2008-11-14 | ||
| JP2008292849 | 2008-11-14 |
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| WO2010055929A1 true WO2010055929A1 (ja) | 2010-05-20 |
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| Country | Link |
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| US (1) | US8546320B2 (ja) |
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Cited By (2)
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| WO2011161260A1 (en) | 2010-06-25 | 2011-12-29 | Adamed Sp. Z O.O. | Anticancer fusion protein |
| EP2575848A4 (en) * | 2010-05-29 | 2016-09-07 | Univ Ben Gurion | ENCAPSULATED CONJUGATES OF A CELL PENETRATING PEPTIDE FOR DIAGNOSTIC AND THERAPEUTIC APPLICATIONS |
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| US9470677B2 (en) * | 2013-11-28 | 2016-10-18 | Samsung Electronics Co., Ltd. | Cell with surface coated with ANXA1 and use thereof |
| KR102324865B1 (ko) * | 2014-12-29 | 2021-11-12 | 엘지디스플레이 주식회사 | 유기발광 표시장치와 그의 휘도 제어 방법 |
| CN105575367A (zh) * | 2016-03-08 | 2016-05-11 | 京东方科技集团股份有限公司 | 显示屏亮度调节方法及系统 |
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- 2009-11-13 JP JP2010537823A patent/JP5700409B2/ja not_active Expired - Fee Related
- 2009-11-13 WO PCT/JP2009/069405 patent/WO2010055929A1/ja not_active Ceased
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| JP2003523313A (ja) * | 1999-03-12 | 2003-08-05 | アメリカ合衆国 | シャペロン蛋白質の阻害方法 |
| US20030138848A1 (en) * | 2000-03-29 | 2003-07-24 | Ismail Moarefi | 3D structure of polypeptides containing a TPR-structure motif with chaperone-binding function, crystals thereof and compounds for inhibition of said polypeptides |
| US20070031815A1 (en) * | 2003-05-01 | 2007-02-08 | University Of Liverpool | Screening method for identifying hsp90 modulators |
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| EP2575848A4 (en) * | 2010-05-29 | 2016-09-07 | Univ Ben Gurion | ENCAPSULATED CONJUGATES OF A CELL PENETRATING PEPTIDE FOR DIAGNOSTIC AND THERAPEUTIC APPLICATIONS |
| US10167319B2 (en) | 2010-05-29 | 2019-01-01 | Ben-Gurion University Of Negev Research & Development Authority | Caged cell penetrating peptide-polymer conjugates for diagnostic and therapeutic applications |
| US10947275B2 (en) | 2010-05-29 | 2021-03-16 | Ben-Gurion University Of The Negev Research And Development Authority | Caged cell penetrating peptide-polymer conjugates for diagnostic and therapeutic applications |
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| US8546320B2 (en) | 2013-10-01 |
| US20120003299A1 (en) | 2012-01-05 |
| JP5700409B2 (ja) | 2015-04-15 |
| JPWO2010055929A1 (ja) | 2012-04-12 |
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