WO2019221269A1 - 抗ヒトMUC1抗体Fabフラグメント、ペプチドリンカー及び/又は配位子を含む複合体 - Google Patents
抗ヒトMUC1抗体Fabフラグメント、ペプチドリンカー及び/又は配位子を含む複合体 Download PDFInfo
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- TVEZZUHOHBHOGC-UHFFFAOYSA-N CCC(C)(CC)C(C)=N Chemical compound CCC(C)(CC)C(C)=N TVEZZUHOHBHOGC-UHFFFAOYSA-N 0.000 description 1
- SEEYREPSKCQBBF-UHFFFAOYSA-N CN(C(C=C1)=O)C1=O Chemical compound CN(C(C=C1)=O)C1=O SEEYREPSKCQBBF-UHFFFAOYSA-N 0.000 description 1
- KKNIYDJGBPBGHN-UHFFFAOYSA-N NC(CNC(Nc(cc1)ccc1N=C=S)=S)=O Chemical compound NC(CNC(Nc(cc1)ccc1N=C=S)=S)=O KKNIYDJGBPBGHN-UHFFFAOYSA-N 0.000 description 1
- WGCCLTQHELFIDR-UHFFFAOYSA-N NCC(NN(C(C=C1)=O)C1=O)=O Chemical compound NCC(NN(C(C=C1)=O)C1=O)=O WGCCLTQHELFIDR-UHFFFAOYSA-N 0.000 description 1
- OMWQUXGVXQELIX-UHFFFAOYSA-N S=C=Nc(cc1)ccc1N=C=S Chemical compound S=C=Nc(cc1)ccc1N=C=S OMWQUXGVXQELIX-UHFFFAOYSA-N 0.000 description 1
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- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/30—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants from tumour cells
- C07K16/3076—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants from tumour cells against structure-related tumour-associated moieties
- C07K16/3092—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants from tumour cells against structure-related tumour-associated moieties against tumour-associated mucins
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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
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- 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
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- A61K47/68—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 an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment
- A61K47/6835—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 an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment the modifying agent being an antibody or an immunoglobulin bearing at least one antigen-binding site
- A61K47/6851—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 an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment the modifying agent being an antibody or an immunoglobulin bearing at least one antigen-binding site the antibody targeting a determinant of a tumour cell
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- A61K51/04—Organic compounds
- A61K51/0474—Organic compounds complexes or complex-forming compounds, i.e. wherein a radioactive metal (e.g. 111In3+) is complexed or chelated by, e.g. a N2S2, N3S, NS3, N4 chelating group
- A61K51/0482—Organic compounds complexes or complex-forming compounds, i.e. wherein a radioactive metal (e.g. 111In3+) is complexed or chelated by, e.g. a N2S2, N3S, NS3, N4 chelating group chelates from cyclic ligands, e.g. DOTA
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- A61K51/1045—Antibodies or immunoglobulins; Fragments thereof, the carrier being an antibody, an immunoglobulin or a fragment thereof, e.g. a camelised human single domain antibody or the Fc fragment of an antibody against animal or human tumor cells or tumor cell determinants
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- A61K51/1093—Antibodies or immunoglobulins; Fragments thereof, the carrier being an antibody, an immunoglobulin or a fragment thereof, e.g. a camelised human single domain antibody or the Fc fragment of an antibody conjugates with carriers being antibodies
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- C07K19/00—Hybrid peptides, i.e. peptides covalently bound to nucleic acids, or non-covalently bound protein-protein complexes
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- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
- C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
- C07K5/06—Dipeptides
- C07K5/06008—Dipeptides with the first amino acid being neutral
- C07K5/06017—Dipeptides with the first amino acid being neutral and aliphatic
- C07K5/06026—Dipeptides with the first amino acid being neutral and aliphatic the side chain containing 0 or 1 carbon atom, i.e. Gly or Ala
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- C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
- C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
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- C07K5/06008—Dipeptides with the first amino acid being neutral
- C07K5/06017—Dipeptides with the first amino acid being neutral and aliphatic
- C07K5/0606—Dipeptides with the first amino acid being neutral and aliphatic the side chain containing heteroatoms not provided for by C07K5/06086 - C07K5/06139, e.g. Ser, Met, Cys, Thr
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- C07K5/0802—Tripeptides with the first amino acid being neutral
- C07K5/0804—Tripeptides with the first amino acid being neutral and aliphatic
- C07K5/0806—Tripeptides with the first amino acid being neutral and aliphatic the side chain containing 0 or 1 carbon atoms, i.e. Gly, Ala
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- C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
- C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
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- C07K2317/00—Immunoglobulins specific features
- C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
- C07K2317/55—Fab or Fab'
Definitions
- the present invention relates to a complex comprising an anti-human MUC1 antibody Fab fragment, a peptide linker and / or a ligand.
- the present invention also relates to a diagnostic composition and / or pharmaceutical composition comprising the complex, a method for diagnosing and / or treating cancer using the complex, and the like.
- Mucin 1 (Mucin 1: MUC1) is a membrane-bound glycoprotein expressed on the lumen side of epithelial cells constituting epithelial tissues such as the mammary gland, trachea and digestive tract (Nat. Rev. Cancer, 2004 Jan; 4). (1): 45-60.). MUC1 is breast cancer (Mod. Pathol., 2005 Oct; 18 (10): 1295-304.), Lung cancer (Hum. Pathol., 2008 Jan; 39 (1): 126-36.), Colon cancer (Int. J.
- MUC1 is useful as a target molecule for detecting cancer foci (Nat. Rev. Cancer, 2004 Jan; 4 (1): 45-60., Pathol. Res. Pract., 2010 Aug 15; 206 (8): 585-9.).
- MUC1 is O-glycosylated at the 9th threonine of HGVTSAPPDTRPAPGSTAPPA (SEQ ID NO: 15), which is a 20 amino acid tandem repeat sequence present in the extracellular domain.
- this O-glycosylation is incomplete, and T (Gal ⁇ 1-3GalNAc ⁇ 1-O-Ser / Thr), Tn (GalNAc ⁇ 1-O-Ser / Thr) and 2,3ST (Neu5Ac ⁇ 2-3Gal ⁇ 1-3GalNAc ⁇ -O- It is known that O-glycosylation such as Ser / Thr) occurs specifically in cancer (Patent Document 1, Non-Patent Document 1).
- human cancer-specific MUC1 is particularly useful as a target molecule for treating various cancers in humans.
- an anti-human cancer-specific MUC1 antibody for example, 1B2 antibody (Patent Document 1), PankoMab antibody (Non-Patent Document 2), 5E5 antibody (Patent Document 2) and the like are known.
- 1B2 antibody PankoMab antibody
- 5E5 antibody Patent Document 2
- the 1B2 antibody has higher specificity for human cancer-specific MUC1 than the PankoMab antibody (Patent Document 1).
- antibodies generally have a long blood half-life and, after administration to the body, require a long period of 4-5 days to reach a tumor-to-blood ratio that gives a sufficient signal-to-background ratio to visualize cancer.
- the Fc region of an antibody causes pharmacological action of antibody-dependent cytotoxicity (Antibody-Dependent Cellular Cytotoxicity: ADCC) and complement-dependent cytotoxicity (Complement-Dependent Cytotoxicity: CDC) (Non-patent Document 1, Curr. Opin.Biotechnol., 2002 Dec; 13 (6): 609-14.).
- an antibody fragment such as Fab is suitable for use as a diagnostic agent since it has a short half-life in blood and is excreted by the kidney (Nat. Biotechnol., 2005 Sep; 23 (9 ): 1126-36.).
- a monovalent Fab fragment has a molecular weight of about 50 kDa, is smaller than an antibody of about 150 kDa, is excreted by the kidney, and has a short half-life in blood. Therefore, a tumor-to-blood ratio is reached that gives a signal-to-background ratio sufficient to visualize cancer within 2-32 hours after administration. Since there is no Fc region, ADCC and CDC are not caused. Fab fragments do not interfere with detection of liver metastases, mainly due to renal excretion. From these features, Fab fragments can be expected to be more effective as in-vivo diagnostics than antibodies.
- the Fab fragment changes from divalent to monovalent, its binding activity often decreases. Furthermore, in order to use the antibody as a drug used in in-vivo diagnostics or photoimmunotherapy, it must be labeled with a detectable substance such as a fluorescent dye or a contrast agent, but by being labeled with such a substance, There is a problem that the binding activity is weakened.
- An object of the present invention is to provide a complex comprising an anti-human MUC1 antibody Fab fragment, a peptide linker and a ligand having an excellent binding activity to human cancer-specific MUC1 equivalent to the anti-human MUC1 antibody Fab fragment, and an anti-human MUC1 antibody
- the object is to provide a complex composed of a Fab fragment and a ligand.
- Another object of the present invention is to provide a diagnostic composition containing the complex and a diagnostic method using the same, and a pharmaceutical composition containing the complex and a treatment method using the same. There is to do.
- the present inventors made an anti-human MUC1 antibody Fab fragment having a good affinity for human cancer-specific MUC1, and, as a result of further intensive investigations, found that a ligand was added to the anti-human MUC1 antibody Fab fragment, a peptide A complex bound through (or without) a linker was prepared.
- the complex has an affinity for human cancer-specific MUC1 equivalent to the anti-human MUC1 antibody Fab fragment itself. That is, the present invention provides a complex comprising an anti-human MUC1 antibody Fab fragment, a peptide linker and a ligand, and a complex comprising an anti-human MUC1 antibody Fab fragment and a specific ligand.
- the complex does not diminish the binding activity to human cancer-specific MUC1 even by the binding of the labeling moiety, and retains the favorable binding activity to human cancer-specific MUC1, Based on the results, diagnostic means and therapeutic means using the complex of the present invention are provided.
- the present invention may be as follows.
- the following formula (I): (YS 1 -X) p -Fab (I) [Wherein Fab is the following (a) and (b): (A) an anti-human MUC1 comprising a heavy chain fragment comprising a heavy chain variable region comprising the amino acid sequence represented by SEQ ID NO: 8 or 10 and a light chain comprising a light chain variable region comprising the amino acid sequence represented by SEQ ID NO: An antibody Fab fragment, and (b) a heavy chain variable region comprising the amino acid sequence shown in SEQ ID NO: 8 or SEQ ID NO: 10, wherein the glutamine of amino acid number 1 in SEQ ID NO: 8 or SEQ ID NO: 10 is modified with pyroglutamic acid An anti-human selected from the group consisting of a heavy chain fragment comprising a heavy chain variable region and an anti-human MUC1 antibody Fab fragment comprising a light chain comprising a light chain variable region consisting of the amino acid sequence set forth in
- Cyclododecane-1,4,7,10-tetraacetic acid (DOTA)]
- the complex indicated by [2] Fab has the following (a) and (b): (A) an anti-human MUC1 antibody Fab fragment comprising a heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 2 or SEQ ID NO: 4 and a light chain consisting of the amino acid sequence shown in SEQ ID NO: 6; and (b) SEQ ID NO: 2 or A heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 4, wherein the glutamine of amino acid number 1 in SEQ ID NO: 2 or SEQ ID NO: 4 is modified with pyroglutamic acid, and the amino acid shown in SEQ ID NO: 6
- An anti-human MUC1 antibody Fab fragment comprising a light chain consisting of a sequence;
- the complex according to [1] above, which is selected from the group consisting of: [3] Fab has the following (a) and (b): (A)
- a heavy chain fragment in which Fab is the heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 4, wherein the glutamine of amino acid number 1 in SEQ ID NO: 4 is modified with pyroglutamic acid, and shown in SEQ ID NO: 6
- the complex according to [4] above which is an anti-human MUC1 antibody Fab fragment comprising a light chain consisting of an amino acid sequence.
- X is a peptide linker comprising a peptide consisting of 2 to 4 amino acids having an amino acid sequence cleaved by a kidney brush border membrane enzyme or a lysosomal enzyme The complex described in 1.
- (YS 1 -X) p -Fab is The complex according to [11] above, wherein a nitrogen atom of an amino group selected from the group consisting of is bound to a carbon atom of a C ( ⁇ NH) group at the X terminus.
- [16] The complex according to any one of [13] to [15] above, wherein p is a natural number of 1 to 4.
- [18] The complex according to [17] above, wherein the metal is a metal radioisotope. [19] The composite according to [18] above, wherein the metal is 89 Zr. [20] The composite according to any one of [18] to [19], which is a PET tracer. [21] A diagnostic composition comprising one or more complexes according to any one of [17] to [20] above and a pharmaceutically acceptable carrier. [22] The diagnostic composition according to [21] above, which is an early diagnostic agent, a staging agent, or an intraoperative diagnostic agent. [23] The diagnostic composition according to [21] or [22], which is used for diagnosis of cancer that expresses human MUC1.
- the diagnostic composition according to [23], wherein the cancer is breast cancer, lung cancer, colon cancer, bladder cancer, skin cancer, thyroid cancer, stomach cancer, pancreatic cancer, kidney cancer, ovarian cancer, or cervical cancer. Stuff.
- a pharmaceutical composition comprising one or more complexes according to any one of [17] to [20] above and a pharmaceutically acceptable carrier.
- the pharmaceutical composition according to the above [26], wherein the cancer is breast cancer, lung cancer, colon cancer, bladder cancer, skin cancer, thyroid cancer, stomach cancer, pancreatic cancer, kidney cancer, ovarian cancer, or cervical cancer. .
- [28] Use of the complex according to any one of the above [17] to [20] for the manufacture of a diagnostic composition for cancer and / or a pharmaceutical composition for treating cancer.
- a method for diagnosing cancer comprising administering to a subject a diagnostically effective amount of the complex according to any one of [17] to [20].
- a method for treating cancer comprising administering to a subject a therapeutically effective amount of the complex according to any one of [17] to [20] above.
- the complex comprising an anti-human MUC1 antibody Fab fragment of the present invention, a peptide linker and a ligand, and the complex comprising an anti-human MUC1 antibody Fab fragment and a specific ligand are excellent for binding to human cancer-specific MUC1. Has activity. Therefore, the complex of the present invention further containing a metal is expected to be useful for diagnosis and / or treatment of cancer.
- FIG. 1 is a graph and a table showing the binding activity of P10-1 Fab, P10-2 Fab and Comparative Example 1B2 Fab to human cancer-specific MUC1.
- the complex of the present invention has the following formula (I): (YS 1 -X) p -Fab (I) [Where: Fab is an anti-human MUC1 antibody Fab fragment, X is a peptide linker or bond; S 1 is a spacer or a bond, Y is a ligand, and p is a natural number from 1 to 25, However, when X is a bond, S 1 is —CH 2 — (1,4-phenylene) -NH—C ( ⁇ S) — or a bond, and Y is 1,4,7,10-tetraaza. Cyclododecane-1,4,7,10-tetraacetic acid (DOTA)] It is a complex shown by.
- DOTA Cyclododecane-1,4,7,10-tetraacetic acid
- Anti-human MUC1 antibody Fab fragment (Fab) The anti-human MUC1 antibody Fab fragment represented by “Fab” in the formula (I) will be described.
- the basic structure of the antibody molecule is common to each class, and consists of a heavy chain with a molecular weight of 50,000 to 70,000 and a light chain with 20,000 to 30,000.
- the heavy chain is usually composed of a polypeptide chain containing about 440 amino acids, has a characteristic structure for each class, and corresponds to IgG, IgM, IgA, IgD, IgE, ⁇ , ⁇ , ⁇ , ⁇ . It is called a chain.
- IgG includes IgG1, IgG2, IgG3, and IgG4, which are called ⁇ 1, ⁇ 2, ⁇ 3, and ⁇ 4, respectively.
- the light chain is usually composed of a polypeptide chain containing about 220 amino acids, and two types of L-type and K-type are known and are called ⁇ and ⁇ chains, respectively.
- the peptide structure of the basic structure of an antibody molecule has a molecular weight of 150,000 to 190,000, in which two heavy chains and two light chains that are homologous are linked by a disulfide bond (SS bond) and a non-covalent bond, respectively. .
- the two light chains can be paired with any heavy chain.
- Each antibody molecule always consists of two identical light chains and two identical heavy chains.
- the region between the C H 1 domain and C H 2 domain of the heavy chain constant region of an antibody is called the hinge region, and this region contains a number of proline residues and a plurality of chains connecting two heavy chains. Includes inter-SS bond.
- each of the human IgG1, IgG2, IgG3, and IgG4 hinge regions has two, four, eleven, and two cysteine residues that constitute SS bonds between heavy chains, respectively.
- the hinge region is a region that is highly sensitive to proteolytic enzymes such as papain and pepsin.
- the heavy chain When the antibody is digested with papain, the heavy chain is cleaved at a position N-terminal to the S—S bond between the heavy chains in the hinge region and decomposed into two Fab fragments and one Fc fragment.
- the Fab fragment is composed of a heavy chain fragment comprising a light chain, a heavy chain variable region (V H ), a C H 1 domain and a portion of the hinge region. Fab fragments contain variable regions and have antigen binding activity.
- the anti-human MUC1 antibody Fab fragment included in the conjugates of the invention is a Fab fragment having the following characteristics: Anti-human MUC1 antibody Fab fragment comprising a heavy chain fragment comprising a heavy chain variable region comprising the amino acid sequence represented by SEQ ID NO: 8 or 10 and a light chain comprising a light chain variable region comprising the amino acid sequence represented by SEQ ID NO: 12 .
- the anti-human MUC1 antibody Fab fragment contained in the complex of the present invention comprises a heavy chain fragment comprising a heavy chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 10 and the amino acid sequence shown in SEQ ID NO: 12.
- the heavy chain constant region of the anti-human MUC1 antibody Fab fragment contained in the complex of the present invention any constant region such as Ig ⁇ 1, Ig ⁇ 2, Ig ⁇ 3, or Ig ⁇ 4 can be selected.
- the heavy chain constant region of the anti-human MUC1 antibody Fab fragment included in the conjugates of the invention is a human Ig ⁇ 1 constant region.
- the light chain constant region of the anti-human MUC1 antibody Fab fragment contained in the complex of the present invention either Ig ⁇ or Ig ⁇ constant region can be selected.
- the light chain constant region of the anti-human MUC1 antibody Fab fragment included in the complex of the invention is a human Ig ⁇ constant region.
- the anti-human MUC1 antibody Fab fragment included in the complex of the invention is the following Fab fragment: An anti-human MUC1 antibody Fab fragment comprising a heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 2 or SEQ ID NO: 4 and a light chain consisting of the amino acid sequence shown in SEQ ID NO: 6.
- the anti-human MUC1 antibody Fab fragment included in the complex of the present invention comprises a heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 4 and a light chain consisting of the amino acid sequence shown in SEQ ID NO: 6.
- Anti-human MUC1 antibody Fab fragment comprises a heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 4 and a light chain consisting of the amino acid sequence shown in SEQ ID NO: 6.
- the anti-human MUC1 antibody Fab fragment contained in the complex of the present invention may include a Fab fragment produced by post-translational modification.
- anti-human MUC1 antibody Fab fragments of the present invention that can be generated by post-translational modification include heavy chain N-terminal pyroglutamylated anti-human MUC1 antibody Fab fragments. It is known in the art that such post-translational modification by N-terminal pyroglutamylation does not affect antibody activity (Anal. Biochem. 2006 Jan 1; 348 (1): 24- 39.).
- the anti-human MUC1 antibody Fab fragment included in the conjugates of the invention is an anti-human MUC1 antibody Fab fragment having the following characteristics: A heavy chain comprising a heavy chain variable region comprising the amino acid sequence shown in SEQ ID NO: 8 or SEQ ID NO: 10, wherein the glutamine of amino acid number 1 in SEQ ID NO: 8 or SEQ ID NO: 10 is modified with pyroglutamic acid An anti-human MUC1 antibody Fab fragment comprising a fragment and a light chain comprising a light chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 12.
- the anti-human MUC1 antibody Fab fragment included in the conjugates of the invention is an anti-human MUC1 antibody Fab fragment having the following characteristics: A heavy chain variable region comprising the heavy chain variable region comprising the amino acid sequence shown in SEQ ID NO: 10, wherein the glutamine of amino acid number 1 of SEQ ID NO: 10 is modified with pyroglutamic acid, and SEQ ID NO: 12 An anti-human MUC1 antibody Fab fragment comprising a light chain comprising a light chain variable region consisting of the amino acid sequence shown.
- the anti-MUC1 antibody Fab fragment included in the conjugates of the invention is an anti-human MUC1 antibody Fab fragment having the following characteristics: A heavy chain fragment comprising the amino acid sequence shown in SEQ ID NO: 2 or SEQ ID NO: 4, wherein the glutamine of amino acid number 1 in SEQ ID NO: 2 or SEQ ID NO: 4 is modified with pyroglutamic acid; and SEQ ID NO: 6 An anti-human MUC1 antibody Fab fragment comprising a light chain consisting of the amino acid sequence shown in 1.
- the anti-MUC1 antibody Fab fragment included in the conjugates of the invention is an anti-human MUC1 antibody Fab fragment having the following characteristics: A heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 4, wherein the glutamine of amino acid number 1 in SEQ ID NO: 4 is modified with pyroglutamic acid, and a light chain consisting of the amino acid sequence shown in SEQ ID NO: 6. Anti-human MUC1 antibody Fab fragment comprising a chain.
- the anti-human MUC1 antibody Fab fragment contained in the complex of the present invention binds to human cancer-specific MUC1.
- Cancer-specific MUC1 is expressed in cancers such as breast cancer, lung cancer, colon cancer, bladder cancer, skin cancer, thyroid cancer, gastric cancer, pancreatic cancer, kidney cancer, ovarian cancer or cervical cancer.
- Methods for measuring the binding activity of the obtained anti-human MUC1 antibody Fab fragment to human cancer-specific MUC1 include methods such as ELISA and FACS.
- human cancer-specific MUC1-positive cells for example, T-47D cells
- Fab fragments added thereto and then labeled with horseradish peroxidase or the like.
- the binding of the secondary antibody is identified by measuring the activity using a reagent that detects its activity (for example, in the case of horseradish peroxidase labeling, a chemiluminescent horseradish peroxidase substrate). .
- the anti-human MUC1 antibody Fab fragment contained in the complex of the present invention is a method known in the art based on the heavy chain fragment and light chain sequence information of the anti-human MUC1 antibody Fab fragment disclosed herein. Can be easily made by those skilled in the art.
- the anti-human MUC1 antibody Fab fragment contained in the complex of the present invention is not particularly limited. For example, it is described in ⁇ Method for producing anti-human MUC1 antibody Fab fragment contained in the complex of the present invention> described later. It can manufacture according to the method of.
- Ligand (Y) The ligand represented by “Y” in the formula (I) will be described.
- the “ligand” is a moiety capable of forming a chelate complex with a metal in the complex of the present invention, and means a group composed of a chelating agent.
- the group to be formed is a group having a bond by removing a proton from a chelating agent.
- the group composed of the chelating agent binds to the anti-human MUC1 antibody Fab fragment directly or via a spacer and / or peptide linker.
- a “chelating agent” refers to a compound that can coordinate with a metal.
- “chelating agents” include siderophores and non-siderophores.
- the siderophore include a hydroxamic acid type, a catechol type, and a mixed ligand type.
- hydroxamic acid type siderophores include ferrichrome and the following formula: And deferoxamine (DFO), fusarinin C, ornibactin, and rhodotoruric acid represented by the formula:
- Examples of the catechol-type siderophore include enterobactin, batilibactin, and vibriobactin.
- Examples of the mixed ligand siderophore include azotobactin, pyoverzine, and yersinia bactin.
- DFO can be reacted with a spacer or a peptide linker via its reactive functional group —NH 2.
- siderophores other than DFO a carboxyl group, a hydroxyl group, an amino group, etc. It can also be made to react with a spacer or a peptide linker by the method normally used by those skilled in the art through this reactive functional group.
- non-siderophores examples include the following formula: DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid, CAS number: 60239-18-1), DTPA (diethylenetriaminepentaacetic acid, CAS number: 67) -43-6), DTPA-BMA (1,7-bis (methylcarbamoylmethyl) -1,4,7-triazaheptane-1,4,7-triacetic acid, CAS No .: 19895-95-3), EOB-DTPA (N-[(2S) -2- [bis (carboxymethyl) amino] -3- (4-ethoxyphenyl) propyl] -N- [2- [bis (carboxymethyl) amino] ethyl] glycine, CAS number: 158599-72-5), TTHA (triethylenetetramine hexaacetic acid, CAS number: 869-52-3), DO3A (1,4,7,
- Examples of the “chelating agent” that forms a ligand contained in the complex of the present invention include DFO, DOTA, DTPA, DTPA-BMA, EOB-DTPA, DO3A, and HP-DO3A. As a certain aspect, DFO and DOTA are mentioned.
- complex in this specification also include a free body and its salt.
- the “salt thereof” may form an acid addition salt or a salt with a base depending on the type of substituents of the compound and the complex, and the salt that the compound and the complex can form.
- inorganic acids such as hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, nitric acid, phosphoric acid, formic acid, acetic acid, propionic acid, oxalic acid, malonic acid, succinic acid, fumaric acid, maleic acid Acid addition with organic acids such as lactic acid, malic acid, mandelic acid, tartaric acid, dibenzoyl tartaric acid, ditoluoyl tartaric acid, citric acid, methanesulfonic acid, ethanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid, aspartic acid, glutamic acid Salts, salts with inorganic bases such as sodium, potassium, magnesium, calcium and aluminum, salts with organic bases such as methylamine, ethylamine, ethanolamine, lysine and ornithine, salts with various amino acids and amino acid derivatives such as acetyll
- the complex of the present invention containing a metal can be used for various contrast agents and / or cancer therapeutic agents, for example, MRI contrast agents, drugs used for PET tracers, and the like.
- the above-mentioned siderophore and non-siderophore chelating agent are used.
- the above-mentioned siderophore and non-siderophore chelating agent are used, and as an aspect, DFO or DOTA.
- the chelating agent may contain a metal.
- metal means a paramagnetic metal ion or a metal radioactive isotope.
- the metal is not particularly limited as long as it is a metal coordinated to each chelating agent.
- an appropriate chelating agent and metal combination is selected.
- Paramagnetic metal ions are preferably used for MRI contrast agents.
- Paramagnetic metal ions include Fe 2+ , Fe 3+ , Cu 2+ , Ni 2+ , Rh 2+ , Co 2+ , Gd 3+ , Eu 3+ , Dy 3+ , Tb 3+ , Pm 3+ , Nd 3+ , Tm 3+ , Ce 3+ , Y 3+ , Ho 3+ , Er 3+ , La 3+ , Yb 3+ , Mn 3+ , or Mn 2+ It is not limited. Some embodiments include Gd 3+ , Mn 3+ , Mn 2+ , Fe 2+ , or Fe 3+ . Some embodiments include Mn 3+ or Mn 2+ .
- halogen or the like can be used as a counter anion in the complex.
- the counter anion may be a ligand C ( ⁇ O) O 2 —
- the complex may have a counter cation such as Na + .
- Metal radioactive isotopes are used in PET tracers and the like. Some embodiments of the metal radioisotope include, but are not limited to, 89 Zr, 51 Mn, 52 Fe, 60 Cu, 67 Ga, 68 Ga, 72 As, 90 Y, 99m Tc, 111 In or 177 Lu. Not. As one aspect of the metal radioisotope used for PET tracers, 89 Zr, 60 Cu, 67 Ga, 68 Ga, 99m Tc, or 111 In is used. One embodiment includes a radioisotope of zirconium. One embodiment includes 89 Zr. Some embodiments of metal radioisotopes used in the treatment of cancer include 90 Y or 177 Lu.
- An embodiment of the complex of the present invention is a complex in which Y is DFO with 89 Zr coordinated.
- Another embodiment is a composite in which Y is DOTA to which a metal radioisotope composed of 89 Zr, 90 Y, 67 Ga, 68 Ga and 177 Lu is coordinated.
- Y is a complex in which Y is DOTA to which a paramagnetic metal ion consisting of 89 Zr, Gd 3+ and Y 3+ is coordinated.
- Y is a composite in which Y is DOTA to which a paramagnetic metal ion composed of Gd 3+ and Y 3+ is coordinated.
- Peptide linker or bond (X) In the complex of the present invention, the ligand (Y) or spacer (S 1 ) and Fab may be directly bonded, or may be bonded via a peptide linker (X).
- the peptide linker represented by “X” in the formula (I) will be described.
- the “peptide linker” is a linker containing a peptide consisting of 2 to 4 amino acids, and optionally has a spacer Z 1 or Z 2 suitable for binding to an anti-human MUC1 antibody Fab fragment. May be.
- the peptide included in the peptide linker is not particularly limited, but preferably glycine (Gly), lysine (Lys), methionine (Met), isoleucine (Ile), phenylalanine (Phe), valine (Val), Each of tyrosine (Tyr), arginine (Arg), alanine (Ala), glutamine (Gln), glutamic acid (Glu), asparagine (Asn), aspartic acid (Asp), histidine (His), and leucine (Leu), respectively.
- a selected peptide consisting of 2 to 4 amino acids more preferably a peptide consisting of 2 to 4 amino acids each selected from the group consisting of glycine, lysine, methionine, isoleucine, phenylalanine, valine, tyrosine and arginine. is there. Unless otherwise specified, the amino acid residue other than glycine is in the L-form.
- An embodiment of the peptide linker is a peptide linker that contains a peptide consisting of 2 to 4 amino acids having an amino acid sequence cleaved by a kidney brush border membrane enzyme or a lysosomal enzyme, and may further have a spacer. It has been reported that peptide linkers with amino acid sequences that are cleaved by kidney brush border membrane enzymes or lysosomal enzymes are cleaved specifically by these enzymes present in the kidney, thus reducing the accumulation of the label in the kidney. Has been. For example, Adv Drug Deliv Rev. 2008 Sep; 60 (12): 1319-28. Bioconjug Chem. 2005 Nov-Dec; 16 (6): 1610-6. , And Cancer Res.
- a glycine-lysine linker is specifically cleaved by a renal brush border membrane enzyme present in the kidney.
- Japanese Patent No. 6164556 describes that a glycine-phenylalanine-lysine linker is specifically cleaved by kidney brush border membrane enzymes in the kidney, and Bioconjug Chem. 2002 Sep-Oct; 13 (5): 985-95.
- a linker containing a glycine-leucine-glycine-lysine sequence Bioconjug Chem. 2013 Feb 20; 24 (2): 291-9.
- a glycine-tyrosine linker is specifically cleaved by a renal brush border membrane enzyme.
- Bioconjug Chem. 2014 Nov 19; 25 (11): 2038-45 Describes that a linker containing a methionine-isoleucine sequence is specifically cleaved by a lysosomal enzyme present in the kidney.
- the peptide linker selected from the group consisting of Met-Ile, Gly-Lys, Gly-Phe-Lys, Met-Val-Lys, Gly-Tyr, Gly-Lys-Lys, and Gly-Arg-Lys
- a peptide linker comprising the amino acid sequence In one embodiment, the peptide linker comprises an amino acid sequence selected from the group consisting of Gly-Lys and Met-Ile.
- the “peptide linker” may optionally have a spacer suitable for binding to the anti-human MUC1 antibody Fab fragment, wherein the spacer suitable for binding to the anti-human MUC1 antibody Fab fragment includes the peptide linker part and It is a group that organically bonds between the nitrogen atom of the amino group of the anti-human MUC1 antibody Fab fragment or a thiol group derived from a disulfide bond.
- a group derived from maleimide for example, the following formula ( II) or a group containing an isothiocyanate-derived group (—NH—C ( ⁇ S) —).
- Z 1 is represented by the following formula (II).
- the spacer is bonded to the amino group or carboxyl group of the amino acid at the terminal of the peptide, or to the amino group (for example, lysine) or hydroxyl group (for example, tyrosine) in the side chain of the amino acid to form a peptide linker.
- An example of a peptide linker formed by binding a spacer to a functional group in the side chain of the amino acid at the end of the peptide is, for example, a group represented by the following formula (III) as a spacer integrated with Lys. In the specification, this is described as -Lys-Z 2- .
- the ligand (Y) and the peptide linker (X) or Fab may be directly bonded, or may be bonded via a spacer.
- the “spacer” described in S 1 is used to create a certain distance between the ligand and the peptide linker or Fab, or to bond the ligand to the peptide linker or Fab.
- S 1 is —C ( ⁇ O) —CH 2 O— (1,3-phenylene) —C ( ⁇ O) —, —C ( ⁇ S) —NH— (1,4-phenylene).
- S 1 is a bond.
- Y is DOTA
- spacer —CH 2- (1,4-phenylene) -NH—C ( ⁇ S) — the following formula (VI ).
- binding of the anti-human MUC1 antibody Fab fragment to the ligand, spacer and / or peptide linker, and binding of the ligand to the spacer and / or peptide linker are known methods. Thus, those skilled in the art can appropriately carry out.
- the “labeling part” means (i) a ligand and a peptide linker (YS 1 -X: where S 1 is a bond and X is a peptide linker), (ii) A ligand (YS 1 -X: wherein S 1 and X are each a bond), or (iii) a ligand, a spacer and a peptide linker (YS 1 -X: where S 1 is a spacer And X is a peptide linker.) Some embodiments include (i) a ligand and a peptide linker, or (ii) a ligand.
- the ligand of the “labeling part” may further contain a metal.
- the ligand includes a metal-containing (i) ligand and a peptide linker or (ii) a ligand.
- the complex of the present invention has one or more labeling moieties (YS 1 -X) via a nitrogen atom of one or more amino groups or a thiol group derived from a disulfide bond in an anti-human MUC1 antibody Fab fragment (Fab). It is a combined complex.
- the complex of the present invention may be a mixture of complexes in which the number of labeling moieties to be bonded is different from each other. In the formula (I), 1 to 25 labeling moieties (YS 1 -X) are bound to Fab. Or any mixture thereof.
- the complex of the present invention contains 1 to 25 labeling moieties (YS 1 -X) per Fab, and in one embodiment 1 to 23 labeling moieties (Y— S 1 -X), and in some embodiments 1 to 15 labeling moieties (YS 1 -X), and in some embodiments 1 to 11 labeling moieties (YS 1 -X), Some embodiments include 1 to 9 labeling moieties (YS 1 —X), some embodiments include 1 to 7 labeling moieties (YS 1 —X), and some embodiments include 1 to 5 labeling moieties (YS 1 —X). It includes a labeling portion (YS 1 -X), and in some embodiments, 1 to 4 labeling portions (YS 1 -X).
- “p” representing the number of bonds of the labeling moiety (YS 1 -X) to one Fab is a natural number of 1 to 25 as an aspect, and a natural number of 1 to 23 as an aspect.
- a certain aspect is a natural number of 1 to 15, a certain aspect is a natural number of 1 to 11, a certain aspect is a natural number of 1 to 9, a certain aspect is a natural number of 1 to 7, and a certain aspect Is a natural number of 1 to 5, and in some embodiments, it is a natural number of 1 to 4.
- the anti-human MUC1 antibody Fab fragment included in the complex of the present invention is a heavy chain fragment of the anti-human MUC1 antibody Fab fragment.
- a polynucleotide comprising a base sequence encoding the light chain of the anti-human MUC1 antibody Fab fragment is provided.
- the polynucleotide encoding the anti-human MUC1 antibody Fab fragment contained in the complex of the present invention has a base sequence encoding a heavy chain fragment comprising a heavy chain variable region consisting of the amino acid sequence represented by SEQ ID NO: 8. Or a polynucleotide comprising a base sequence encoding a heavy chain fragment comprising a heavy chain variable region comprising the amino acid sequence shown in SEQ ID NO: 10.
- polynucleotide containing the base sequence encoding the heavy chain fragment containing the heavy chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 8 examples include the polynucleotide containing the base sequence shown in SEQ ID NO: 7.
- polynucleotide containing the base sequence which codes the heavy chain fragment containing the heavy chain variable region which consists of an amino acid sequence shown by sequence number 10 the polynucleotide containing the base sequence shown by sequence number 9 is mentioned, for example.
- the polynucleotide encoding the anti-human MUC1 antibody Fab fragment contained in the complex of the present invention comprises a nucleotide sequence encoding a heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 2, Alternatively, a polynucleotide comprising a base sequence encoding a heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 4.
- Examples of the polynucleotide containing the base sequence encoding the heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 2 include the polynucleotide containing the base sequence shown in SEQ ID NO: 1.
- the polynucleotide containing the base sequence which codes the heavy chain fragment which consists of an amino acid sequence shown by sequence number 4 is mentioned, for example.
- the polynucleotide encoding the anti-human MUC1 antibody Fab fragment contained in the complex of the present invention has a nucleotide sequence encoding a light chain comprising a light chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 12.
- Examples of the polynucleotide containing the base sequence encoding the light chain including the light chain variable region consisting of the amino acid sequence shown in SEQ ID NO: 12 include the polynucleotide containing the base sequence shown in SEQ ID NO: 11.
- the polynucleotide encoding the anti-human MUC1 antibody Fab fragment contained in the complex of the present invention is a polynucleotide comprising a base sequence encoding a light chain consisting of the amino acid sequence shown in SEQ ID NO: 6. .
- Examples of the polynucleotide containing the base sequence encoding the light chain consisting of the amino acid sequence shown in SEQ ID NO: 6 include the polynucleotide containing the base sequence shown in SEQ ID NO: 5.
- the polynucleotide encoding the anti-human MUC1 antibody Fab fragment contained in the complex of the present invention is based on the nucleotide sequence designed based on the amino acid sequence of the heavy chain and the light chain of the anti-human MUC1 antibody Fab fragment. It is possible to synthesize using a gene synthesis method known in the technical field. As such a gene synthesis method, various methods known to those skilled in the art such as an antibody gene synthesis method described in WO 90/07861 can be used.
- Expression vector of polynucleotide encoding anti-human MUC1 antibody Fab fragment included in the complex of the present invention includes the anti-human Expression vector comprising polynucleotide comprising base sequence encoding heavy chain fragment of MUC1 antibody Fab fragment, expression vector comprising polynucleotide comprising base sequence encoding light chain of anti-human MUC1 antibody Fab fragment, and anti-human An expression vector comprising a polynucleotide comprising a base sequence encoding the heavy chain fragment of the MUC1 antibody Fab fragment and a polynucleotide comprising a base sequence encoding the light chain of the anti-human MUC1 antibody Fab fragment is included.
- Preferred expression vectors include an expression vector containing a polynucleotide containing a base sequence encoding a heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 4, and a base sequence encoding a light chain consisting of the amino acid sequence shown in SEQ ID NO: 6
- expression vectors are not particularly limited as long as they can produce the polypeptide encoded by the polynucleotide of the present invention in various prokaryotic and / or eukaryotic host cells.
- examples of such an expression vector include a plasmid vector, a viral vector (for example, adenovirus, retrovirus) and the like.
- pEE6.4 or pEE12.4 can be used.
- These expression vectors also include a promoter operably linked to a heavy chain fragment of a polynucleotide encoding an anti-human MUC1 antibody Fab fragment and / or a gene encoding a light chain included in the complex of the present invention.
- Examples of the promoter for expressing the Fab fragment in the host cell include Trp promoter, lac promoter, recA promoter, ⁇ PL promoter, lpp promoter, and tac promoter when the host cell is Escherichia.
- promoters for expression in yeast include PH05 promoter, PGK promoter, GAP promoter, and ADH promoter.
- promoters for expression in Bacillus include SL01 promoter, SP02 promoter, and penP promoter. .
- a virus-derived promoter such as CMV, RSV, SV40, a retrovirus promoter, an actin promoter, an EF (longation factor) 1 ⁇ promoter, a heat shock promoter and the like can be mentioned. It is done.
- These expression vectors may further contain a start codon, a stop codon, a terminator region, and a replicable unit when bacteria, particularly Escherichia coli, is used as a host cell.
- the expression vector may include a start codon and a stop codon.
- the enhancer sequence, the 5 ′ and 3 ′ untranslated regions of the gene encoding the heavy chain fragment and / or light chain of the present invention, a secretory signal sequence, a splicing junction, a polyadenylation site, or A duplicatable unit may be included. Further, it may contain a selection marker (for example, tetracycline resistance gene, ampicillin resistance gene, kanamycin resistance gene, neomycin resistance gene, dihydrofolate reductase gene) that is usually used depending on the purpose.
- a selection marker for example, tetracycline resistance gene, ampicillin resistance gene, kanamycin resistance gene, neomycin resistance gene, dihydrofolate reduct
- Host cells transformed with the expression vector include host cells selected from the group consisting of (a) to (d) below: (A) a host cell transformed with an expression vector comprising a polynucleotide comprising a base sequence encoding the heavy chain fragment of an anti-human MUC1 antibody Fab fragment; (B) a host cell transformed with an expression vector comprising a polynucleotide comprising a base sequence encoding the light chain of an anti-human MUC1 antibody Fab fragment; (C) transformed with an expression vector comprising a polynucleotide comprising a base sequence encoding a heavy chain fragment of an anti-human MUC1 antibody Fab fragment and a polynucleotide comprising a base sequence encoding a light chain of an anti-human MUC1 antibody Fab fragment A host cell; and (d) an expression vector comprising a polynucleotide comprising a base sequence encoding a heavy chain fragment of an anti-human MUC1 antibody Fab fragment A
- the host cell transformed with the expression vector is a host cell transformed with the expression vector of the present invention selected from the group consisting of the following (a) to (d): (A) a host cell transformed with an expression vector comprising a polynucleotide comprising a base sequence encoding a heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 4; (B) a host cell transformed with an expression vector comprising a polynucleotide comprising a nucleotide sequence encoding a light chain consisting of the amino acid sequence represented by SEQ ID NO: 6; (C) Expression comprising a polynucleotide containing a base sequence encoding a heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 4 and a polynucleotide containing a base sequence encoding a light chain consisting of the amino acid sequence shown in SEQ ID NO: 6 A host cell transformed with the vector; and (d) an expression vector comprising a polyn
- the host cell transformed with the expression vector is not particularly limited as long as it is compatible with the expression vector to be used and can be transformed with the expression vector to express the Fab fragment.
- Various cells such as commonly used natural cells or artificially established cells (eg, bacteria (Escherichia, Bacillus), yeast (Saccharomyces, Pichia, etc.), animal cells or insect cells (eg, Sf9)) and mammalian cell lines (eg, cultured cells such as CHO-K1SV cells, CHO-DG44 cells, and 293 cells).
- the transformation itself can be performed by a known method such as a calcium phosphate method or an electroporation method.
- Method for producing anti-human MUC1 antibody Fab fragment contained in the complex of the present invention involves culturing the above transformed host cell and then anti-human MUC1. Expressing an antibody Fab fragment.
- the transformed host cell cultured in the production of the anti-human MUC1 antibody Fab fragment included in the complex of the present invention is selected from the group consisting of the following (a) to (c): (A) a polynucleotide comprising a base sequence encoding a heavy chain fragment of an anti-human MUC1 antibody Fab fragment included in the complex of the present invention and a light chain of the anti-human MUC1 antibody Fab fragment included in the complex of the present invention A host cell transformed with an expression vector comprising a polynucleotide comprising a base sequence encoding (B) an expression vector comprising a polynucleotide comprising a base sequence encoding the heavy chain fragment of an anti-human MUC1 antibody Fab fragment contained in the complex of the present invention and an anti-human MUC1 antibody Fab fragment contained in the complex of the present invention A host cell transformed with an expression vector comprising a polynucleotide comprising a base sequence encoding a light chain; and (A)
- the transformed host cell cultured in the production of the anti-human MUC1 antibody Fab fragment included in the complex of the present invention is selected from the group consisting of the following (a) to (c):
- a host cell transformed with the vector (B) an expression vector comprising a polynucleotide comprising a base sequence encoding a heavy chain fragment consisting of the amino acid sequence shown in SEQ ID NO: 4 and a poly containing a base sequence encoding a light chain consisting of the amino acid sequence shown in SEQ ID NO: 6
- the transformed host cell used is included in a polynucleotide comprising a base sequence encoding a heavy chain fragment of an anti-human MUC1 antibody Fab fragment included in the complex of the present invention and in the complex of the present invention.
- a host cell transformed with an expression vector comprising a polynucleotide comprising a nucleotide sequence encoding the light chain of an anti-human MUC1 antibody Fab fragment, or a heavy chain fragment of an anti-human MUC1 antibody Fab fragment contained in the complex of the present invention A host transformed with an expression vector comprising a polynucleotide comprising a nucleotide sequence encoding the light chain of an anti-human MUC1 antibody Fab fragment contained in the complex of the present invention and an expression vector comprising a polynucleotide comprising the nucleotide sequence encoding It is a cell.
- the transformed host cell can be cultured in a nutrient medium.
- the nutrient medium preferably contains a carbon source, inorganic nitrogen source or organic nitrogen source necessary for the growth of the transformed host cell.
- the carbon source include glucose, dextran, soluble starch, and sucrose.
- the inorganic or organic nitrogen source include ammonium salts, nitrates, amino acids, corn steep liquor, peptone, casein, and meat extract. , Soybean meal, potato extract and the like.
- nutrients eg, inorganic salts (eg, calcium chloride, sodium dihydrogen phosphate, magnesium chloride), vitamins, antibiotics (eg, tetracycline, neomycin, ampicillin, kanamycin, etc.) are included. Also good.
- inorganic salts eg, calcium chloride, sodium dihydrogen phosphate, magnesium chloride
- antibiotics eg, tetracycline, neomycin, ampicillin, kanamycin, etc.
- Culturing of the transformed host cell itself is performed by a known method.
- the culture conditions such as temperature, pH of the medium and culture time are appropriately selected.
- the medium includes MEM medium (Science; 1952; 122: 501.) Containing about 5 to 20% fetal bovine serum, DMEM medium (Virology; 1959; 8: 396-97. ), RPMI 1640 medium (J. Am. Med. Assoc .; 1967; 199: 519-24.), 199 medium (Proc. Soc. Exp. Biol. Med .; 1950; 73: 1-8.) And the like are used. be able to.
- the pH of the medium is preferably about 6 to 8, and the culture is usually carried out at about 30 to 40 ° C. for about 15 to 336 hours, and if necessary, aeration and agitation can be performed.
- the host is an insect cell, for example, Grace's medium containing fetal bovine serum (PNAS; 1985; 82: 8404-8.) And the like can be mentioned, and the pH is preferably about 5-8.
- the culture is usually carried out at about 20 to 40 ° C. for 15 to 100 hours, and if necessary, aeration or agitation can be performed.
- the host is a bacterium, actinomycete, yeast, or filamentous fungus, for example, a liquid medium containing the above nutrient source is appropriate.
- a medium having a pH of 5 to 8 is preferable.
- the host is E. coli.
- preferred media include LB medium, M9 medium (Miller et al., Exp. Mol. Genet, Cold Spring Harbor Laboratory; 1972: 431.) and the like.
- the culture can be performed usually at 14 to 43 ° C. for about 3 to 24 hours with aeration and agitation, if necessary.
- the treatment can be performed usually at 30 to 40 ° C. for about 16 to 96 hours with aeration and stirring as necessary.
- examples of the medium include Burkholder's minimum medium (PNAS; 1980; 77: 4505-8.), And the pH is preferably 5 to 8.
- the culture is usually carried out at about 20 to 35 ° C. for about 14 to 144 hours, and if necessary, aeration or agitation can be performed.
- the transformed anti-human was expressed in addition to the step of culturing the transformed host cell and expressing the anti-human MUC1 antibody Fab fragment.
- a step of recovering, preferably isolating and purifying the MUC1 antibody Fab fragment may be included.
- isolation and purification methods include methods using solubility such as salting out and solvent precipitation, methods using differences in molecular weight such as dialysis, ultrafiltration, gel filtration, and sodium dodecyl sulfate-polyacrylamide gel electrophoresis.
- Methods using charges such as ion exchange chromatography and hydroxylapatite chromatography, methods using specific affinity such as affinity chromatography, methods using hydrophobicity differences such as reverse phase high performance liquid chromatography, etc. Examples thereof include a method using the difference in isoelectric point such as electric point electrophoresis.
- the method for producing the complex of the present invention can include a step of covalently binding an anti-human MUC1 antibody Fab fragment to a labeling moiety (YS 1 -X).
- a labeling moiety YS 1 -X
- a person skilled in the art can appropriately perform the coupling between the components in the labeling part (YS 1 -X) by a known method.
- the ligand (Y) can be bound to the peptide linker (X) directly or via the spacer (S 1 ), and then the peptide linker can be bound to the anti-human MUC1 antibody Fab fragment. .
- the peptide linker and the ligand (Y) can be bound directly or via a spacer (S 1 ).
- a ligand such as DOTA and an anti-human MUC1 antibody Fab fragment can be directly bound by a known method.
- a compound in which a ligand and a spacer (S 1 ) are bonded in advance can also be used as a raw material.
- the method for producing the complex of the present invention also comprises the steps of culturing the transformed host cell and expressing the anti-human MUC1 antibody Fab fragment, and the Fab fragment and the labeling moiety (YS 1 -X ) May be covalently bonded.
- the method for producing the complex of the present invention also comprises culturing the transformed host cell to express the anti-human MUC1 antibody Fab fragment, recovering the expressed Fab fragment, and the Fab.
- a step of covalently bonding the fragment and the labeling part (YS 1 -X) may be included.
- the method for producing the composite of the present invention may further include a step of adding a metal.
- the chelating agent peptide linker, spacer, number of labeling units, metal, etc. used, those described in the present specification can be used.
- the method for producing the complex of the present invention can be carried out as a method including two or more steps specified above as a series of steps, or as a method including at least one step specified above. it can.
- an anti-human MUC1 antibody Fab fragment which comprises the step of combining an enzyme unit (Y-S 1 -X), and a labeled part (Y-S 1 -X) in an anti-human MUC1 antibody Fab fragments conjugated with A method including the step of coordinating the metal is also included in the method of producing the composite of the present invention.
- the method for producing the composite of the present invention includes a method in which the order of steps is different.
- a method of covalently binding an anti-human MUC1 antibody Fab fragment to a labeled moiety (YS 1 -X) in which a metal is coordinated to a ligand is also included in the method for producing the complex of the present invention.
- the present invention relates to a diagnostic composition comprising a complex of the present invention containing a metal (hereinafter referred to as a detectable complex of the present invention).
- the diagnostic composition of the present invention may contain one or more kinds of the complex of the present invention. That is, the diagnostic composition of the present invention may contain one type of the complex of the present invention, or may contain a combination of two or more types of the complex of the present invention.
- the detectable complex of the present invention is formulated according to a conventional method, and can be used as an early diagnostic agent or a stage diagnostic agent (particularly a diagnostic agent for cancer).
- “Early diagnostic agent” means a diagnostic agent whose purpose is to make a diagnosis at an early stage of the disease stage, where no medical condition is observed. For example, in cancer, it means a diagnostic agent used in stage 0 or stage 1 in which no disease state is observed.
- “Stage diagnostic agent” means a diagnostic agent capable of examining how much the disease state is progressing. For example, for cancer, it means a diagnostic agent capable of examining the stage.
- the cancer expected to be diagnosed by the diagnostic composition of the present invention is a cancer that expresses human MUC1.
- Some embodiments include breast cancer, lung cancer, colon cancer, bladder cancer, skin cancer, thyroid cancer, stomach cancer, pancreatic cancer, kidney cancer, ovarian cancer or cervical cancer.
- the cancer is breast cancer or bladder cancer.
- the amount of the complex of the present invention added in formulating the diagnostic composition of the present invention varies depending on the degree and age of the patient's symptoms, the dosage form of the formulation used, the binding titer of the Fab fragment, etc. About 0.001 mg / kg to 100 mg / kg may be used on a mass basis of the Fab fragment per unit body weight of the patient.
- Examples of the dosage form of the diagnostic composition of the present invention include parenteral agents such as injections and infusions, and include intravenous injection, intramuscular injection into the target tissue, subcutaneous injection, intravesical It can be administered by administration.
- parenteral agents such as injections and infusions
- intravenous injection intramuscular injection into the target tissue
- subcutaneous injection intravesical It can be administered by administration.
- carriers and additives corresponding to these dosage forms can be used within a pharmaceutically acceptable range.
- the types of pharmaceutically acceptable carriers and additives are not particularly limited, and carriers and additives well known to those skilled in the art can be used.
- the present invention also relates to the use of the detectable complex of the present invention for the manufacture of a composition for early diagnosis of cancer and a composition for stage diagnosis.
- the present invention also relates to detectable complexes of the present invention for use in early diagnosis, staging of cancer.
- the present invention also relates to a method for diagnosing cancer comprising administering a detectable complex of the present invention to a subject.
- the “subject” is a human or other mammal that needs to receive the diagnosis, and in one embodiment, is a human that needs to receive the diagnosis.
- the effective amount of the complex of the present invention that can be detected in the diagnostic method of the present invention may be the same amount as the effective amount of the complex of the present invention in the formulation.
- the detectable complex of the present invention is preferably administered by intramuscular injection, subcutaneous injection, or the like to the target tissue.
- the invention also relates to the use of an anti-human MUC1 antibody Fab fragment of the invention for the production of a complex of the invention. In one aspect, the invention also relates to the use of an anti-human MUC1 antibody Fab fragment of the invention for the manufacture of a diagnostic composition comprising a complex of the invention.
- the diagnostic composition of the present invention containing a metal radioisotope may be labeled with a metal radioisotope immediately before use, or the diagnostic composition containing a metal radioisotope May be provided as
- the present invention includes a pharmaceutical composition comprising one or more complexes of the present invention containing a metal radioisotope such as 90 Y or 177 Lu and a pharmaceutically acceptable carrier.
- the pharmaceutical composition of the present invention may contain one type of the complex of the present invention, or may contain a combination of two or more types of the complex of the present invention.
- the complex of the present invention can be used for the preparation of a pharmaceutical composition by a commonly used method using a carrier usually used in the art, that is, a pharmaceutical excipient or a pharmaceutical carrier.
- Examples of dosage forms of these pharmaceutical compositions include parenteral agents such as injections and infusions, and can be administered by intravenous administration, subcutaneous administration, intravesical administration or the like. In the formulation, excipients, carriers, additives and the like corresponding to these dosage forms can be used within a pharmaceutically acceptable range.
- the amount of the complex of the present invention added in the formulation varies depending on the degree and age of the patient's symptoms, the dosage form of the formulation used, the binding titer of the Fab fragment, and the like.
- Fab per unit body weight of the patient about 0.001 mg / kg to 100 mg / kg can be used based on the mass of the fragment.
- the pharmaceutical composition containing the complex of the present invention can be used for the treatment of cancer.
- Cancers expected to be treated by the pharmaceutical composition containing the complex of the present invention are those that express human MUC1, for example, breast cancer, lung cancer, colon cancer, bladder cancer, skin cancer, thyroid cancer, stomach cancer, pancreas Cancer, kidney cancer, ovarian cancer or cervical cancer can be mentioned.
- the present invention includes a pharmaceutical composition for treating breast cancer or bladder cancer comprising the complex of the present invention.
- the present invention also includes a method of treating breast cancer or bladder cancer comprising the step of administering a therapeutically effective amount of the complex of the present invention.
- the present invention also includes a method for inducing cell death of cancer cells of breast cancer or bladder cancer, comprising the step of administering a therapeutically effective amount of the complex of the present invention.
- a pharmaceutical composition for treating cancer can also be used for diagnosis of cancer.
- a pharmaceutical composition for treating breast cancer or bladder cancer can also be used for diagnosis of the cancer.
- the present invention also includes the complex of the present invention for use in the treatment of breast cancer or bladder cancer. Furthermore, the present invention includes the use of the complex of the present invention for the manufacture of a pharmaceutical composition for treating breast cancer or bladder cancer.
- the present invention also relates to the use of an anti-human MUC1 antibody Fab fragment of the present invention for the manufacture of a pharmaceutical composition comprising a complex of the present invention.
- Example 1 Preparation of anti-human MUC1 antibody Fab fragment
- P10-1 Fab and P10-2 Fab Two anti-human MUC1 antibody Fab fragments, designated P10-1 Fab and P10-2 Fab, were generated.
- amino acid sequences of the heavy chain variable region and the light chain variable region of P10-1 Fab and P10-2 Fab are the 1B2 antibody, which is a mouse-derived anti-human cancer-specific MUC1 antibody (Front Biosci., 2008 Jan 1; 13: 1619-33.)
- a gene encoding a signal sequence (MEWSWVFFLLSVTTGVHS (SEQ ID NO: 13)) is located 5 ′ of each heavy chain variable region gene of P10-1 Fab and P10-2 Fab, and a constant region gene (sequence) of human Ig ⁇ 1 is 3 ′.
- a GS vector pEE6.4 (Lonza) into which a heavy chain fragment gene formed by linking the base sequences of base numbers 355 to 669 of numbers 1 and 3 was inserted was prepared.
- the 221st Asp based on the EU index by Kabat et al.
- a stop codon was inserted after the codon.
- the gene coding for the signal sequence (MSVPTQVLGLLLWLWTDARC (SEQ ID NO: 14)) is located 5 ′ of the light chain variable region gene common to P10-1 Fab and P10-2 Fab, and the constant region of human ⁇ chain is located 3 ′.
- a GS vector pEE12.4 (Lonza) into which a light chain gene formed by linking genes (consisting of nucleotide sequences 340 to 660 of SEQ ID NO: 5) was inserted was prepared.
- the Fab fragment was expressed by a transient expression method.
- 293F cells Thermo Fisher Scientific
- the GS vector of the above-mentioned heavy chain fragment and the light chain the GS3 Quantitative to the Exp 293F cells (Thermo Fisher Scientific)
- Thermo Fisher Scientific was cultured to about 2.5 million cells / mL in Expi 293 Expression Medium (Thermo Fisher Scientific). (Scientific) and cultured for 8 days. After the expression, the culture supernatant was purified using KappaSelect (GE Healthcare) to obtain each Fab fragment.
- the base sequence of the heavy chain fragment of P10-1 Fab is shown in SEQ ID NO: 1, and the amino acid sequence encoded thereby is shown in SEQ ID NO: 2, respectively.
- the base sequence of the heavy chain variable region of P10-1 Fab is shown in SEQ ID NO: 7, and the amino acid sequence encoded thereby is shown in SEQ ID NO: 8, respectively.
- the base sequence of the heavy chain fragment of P10-2 Fab is shown in SEQ ID NO: 3, and the amino acid sequence encoded thereby is shown in SEQ ID NO: 4, respectively.
- the base sequence of the heavy chain variable region of P10-2 Fab is shown in SEQ ID NO: 9, and the amino acid sequence encoded thereby is shown in SEQ ID NO: 10, respectively.
- the light chains of P10-1 Fab and P10-2 Fab are common, the base sequence thereof is shown in SEQ ID NO: 5, and the amino acid sequence encoded thereby is shown in SEQ ID NO: 6, respectively.
- the base sequence of the light chain variable region of P10-1 Fab and P10-2 Fab is shown in SEQ ID NO: 11, and the amino acid sequence encoded thereby is shown in SEQ ID NO: 12, respectively.
- Example 3 Preparation of anti-human MUC1 antibody Fab fragment complex
- P10-1 Fab was used as the anti-human MUC1 antibody Fab fragment (Fab) in this Example.
- the number of (Y-S 1 -X) to which the Fab of each complex confirmed by MS analysis binds is shown, but the result is a complex having the other number of bonds. It does not indicate that it does not contain. It will be understood that there remains a possibility that a complex with the number of bonds that cannot be confirmed due to the accuracy of the MS analysis instrument.
- TFA trifluoroacetic acid
- reaction mixture was diluted with a mixed solution of TFA (200 ⁇ L) and water (500 ⁇ L), and purified directly by reverse-phase column chromatography (YMC Triart C18, acetonitrile / 0.1% TFA aqueous solution). The desired fraction was collected, concentrated under reduced pressure, and lyophilized to give the title compound (285 mg). MS (ESI-); 1059
- phosphate buffered saline (pH 7.4) and glycerin are added, and finally 0.1M sodium carbonate solution (pH 9.0) is added, so that 6 mg / mL sodium carbonate at pH 8.8-9.0 is added. It was set as the solution.
- p-SCN-Bn-DOTA was added and incubated at 37 ° C. for 2 hours.
- Example 3-4 Synthesis of sample No. 4 ([DOTA] p-Fab)) 2,2 ', 2'',2''-(1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrayl) tetraacetic acid (DOTA) (16 mg) and water ( 1M sodium hydroxide aqueous solution (80 ⁇ L) was added to the mixed solution of 810 ⁇ L) under ice cooling to adjust the pH to 6. To the prepared solution (239 ⁇ L) was added sodium 1-hydroxy-2,5-dioxopyrrolidine-3-sulfonate (2.3 mg) dissolved in water (117 ⁇ L) under ice cooling.
- DOTA 1-hydroxy-2,5-dioxopyrrolidine-3-sulfonate
- N-hydroxysulfosuccinimidyl DOTA solution 100 ⁇ L
- 2M mg / mL Fab 27 ⁇ L
- 0.1M disodium hydrogenphosphate solution 198 ⁇ L
- washing was repeated twice with 10 mM phosphate buffer (pH 7.0) using Amicon Ultra, washed with 0.3 M ammonium acetate buffer, and finally concentrated and filtered to obtain a complex. It was confirmed by MS analysis that the complex was a complex in which one DOTA having a molecular weight of 387 was bound to one Fab having a molecular weight of 47.5 kDa and a complex in which two were bound.
- the complex is a mixture of a complex in which one [DOTA-Gly-Lys-Z 2 ] having a molecular weight of 772 is bound to one Fab having a molecular weight of 47.5 kDa and a complex in which two are bound. Confirmed by MS analysis.
- Example 4 Evaluation of Fab fragment binding activity
- the binding activity to human cancer-specific MUC1 may be referred to as a chimeric 1B2 antibody Fab fragment (hereinafter referred to as 1B2 Fab) by Cell ELISA. It was prepared by linking the C H 1 domain of human IgG1 and the C L domain of ⁇ chain to the V H domain and V L domain of the 1B2 antibody (Patent Document 1) (sequence information is quoted from Patent Document 1).
- H 1 domain and C L domains V 113 th alanine residues based on the EU index by Kabat et al H domain on serine residues, V L domain 109 th based on the EU index by Kabat et al. Alanine residue is replaced with threonine residue).
- a breast cancer cell line expressing human cancer-specific MUC1 T-47D cells (available from ATCC; HTB-133) is seeded on a 96-well ELISA plate coated with collagen I at 0.75 ⁇ 10 4 cells per well.
- Example 5 Evaluation of binding activity of anti-human MUC1 antibody Fab fragment complex
- Each anti-human MUC1 antibody Fab fragment complex produced by the method of Example 3 was subjected to ELISA to evaluate the binding activity to human cancer-specific MUC1.
- Sample No. 5 [DOTA-Gly-Lys-Z 2 ] p -Fab
- Sample No. 7 [DOTA-Met-Ile-NH- (CH 2 ) 2 -Z 1 ] p -Fab
- Human cancer-specific MUC1 peptide (Patent Document 1) was solid-phased on a 384-well ELISA plate at 0.5 ⁇ mol / L per well. Each of the anti-human MUC1 antibody Fab fragment complexes (sample No. 5, 6, 7, or 3) was reacted therewith, and then a horseradish peroxidase-labeled goat anti-human Ig ⁇ antibody (Southern Biotechnology Associates, Inc.) as a secondary antibody. ), ECL Prime Western Blotting Detection Reagent (GE Healthcare) was added to emit light, and the luminous intensity was examined. The results are shown in Table 3. Sample No. It was confirmed that the complex of 5, 6, 7 and 3 has a binding activity to human cancer-specific MUC1 peptide equivalent to P10-1 Fab.
- sample no. It was confirmed that the complex of 4, 1, and 2 also has a binding activity to human cancer-specific MUC1 peptide equivalent to P10-1 Fab.
- the complex of the present invention has an excellent binding activity to human cancer-specific MUC1, it is expected to be useful for diagnosis and / or treatment of cancer.
- SEQ ID NO: 1 Base sequence of DNA encoding P10-1 Fab heavy chain fragment
- SEQ ID NO: 2 Amino acid sequence of P10-1 Fab heavy chain fragment
- SEQ ID NO: 3 Base sequence of DNA encoding P10-2 Fab heavy chain fragment
- SEQ ID NO: 4 amino acid sequence of P10-2 Fab heavy chain fragment
- SEQ ID NO: 5 nucleotide sequence of DNA encoding antibody light chain
- SEQ ID NO: 7 P10-1 Fab heavy chain variable region
- SEQ ID NO: 8 amino acid sequence of P10-1 Fab heavy chain variable region
- SEQ ID NO: 9 base sequence of DNA encoding P10-2 Fab heavy chain variable region
- SEQ ID NO: 10 P10-2 Fab heavy Amino acid sequence of chain variable region
- 11 DNA base sequence encoding antibody light chain variable region
- SEQ ID NO: 12 Amino acid sequence of antibody light chain variable region
- SEQ ID NO: 13 Heavy chain signal sequence
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Abstract
Description
[1]下式(I):
(Y-S1-X)p-Fab (I)
[式中、Fabは、以下の(a)及び(b):
(a)配列番号8又は配列番号10に示されるアミノ酸配列からなる重鎖可変領域を含む重鎖フラグメント及び配列番号12に示されるアミノ酸配列からなる軽鎖可変領域を含む軽鎖を含む抗ヒトMUC1抗体Fabフラグメント、及び
(b)配列番号8又は配列番号10に示されるアミノ酸配列からなる重鎖可変領域であって、配列番号8又は配列番号10のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖可変領域を含む重鎖フラグメント、及び、配列番号12に示されるアミノ酸配列からなる軽鎖可変領域を含む軽鎖を含む、抗ヒトMUC1抗体Fabフラグメント、からなる群より選択される、抗ヒトMUC1抗体Fabフラグメントであり;
Xは、ペプチドリンカー又は結合であり;
S1は、スペーサー又は結合であり;
Yは、配位子であり;並びに、
pは、1~25の自然数であり;
但し、Xが結合であるときは、S1が-CH2-(1,4-フェニレン)-NH-C(=S)-又は結合であり、Yは1,4,7,10-テトラアザシクロドデカン-1,4,7,10-テトラ酢酸(DOTA)である]
で示される複合体。
[2]Fabが、以下の(a)及び(b):
(a)配列番号2又は配列番号4に示されるアミノ酸配列からなる重鎖フラグメント及び配列番号6に示されるアミノ酸配列からなる軽鎖を含む抗ヒトMUC1抗体Fabフラグメント;及び
(b)配列番号2又は配列番号4に示されるアミノ酸配列からなる重鎖フラグメントであって、配列番号2又は配列番号4のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖フラグメント、及び、配列番号6に示されるアミノ酸配列からなる軽鎖を含む、抗ヒトMUC1抗体Fabフラグメント;
からなる群より選択される、上記[1]に記載の複合体。
[3]Fabが、以下の(a)及び(b):
(a)配列番号10に示されるアミノ酸配列からなる重鎖可変領域を含む重鎖フラグメント及び配列番号12に示されるアミノ酸配列からなる軽鎖可変領域を含む軽鎖を含む抗ヒトMUC1抗体Fabフラグメント;及び
(b)配列番号10に示されるアミノ酸配列からなる重鎖可変領域であって、配列番号10のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖可変領域を含む重鎖フラグメント、及び、配列番号12に示されるアミノ酸配列からなる軽鎖可変領域を含む軽鎖を含む、抗ヒトMUC1抗体Fabフラグメント;
からなる群より選択される、上記[1]に記載の複合体。
[4]Fabが、以下の(a)及び(b):
(a)配列番号4に示されるアミノ酸配列からなる重鎖フラグメント及び配列番号6に示されるアミノ酸配列からなる軽鎖を含む抗ヒトMUC1抗体Fabフラグメント;及び
(b)配列番号4に示されるアミノ酸配列からなる重鎖フラグメントであって、配列番号4のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖フラグメント、及び、配列番号6に示されるアミノ酸配列からなる軽鎖を含む、抗ヒトMUC1抗体Fabフラグメント;
からなる群より選択される、上記[2]に記載の複合体。
[5]Fabが、配列番号4に示されるアミノ酸配列からなる重鎖フラグメント、及び配列番号6に示されるアミノ酸配列からなる軽鎖を含む抗ヒトMUC1抗体Fabフラグメントである、上記[4]に記載の複合体。
[6]Fabが、配列番号4に示されるアミノ酸配列からなる重鎖フラグメントであって、配列番号4のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖フラグメント、及び、配列番号6に示されるアミノ酸配列からなる軽鎖を含む抗ヒトMUC1抗体Fabフラグメントである、上記[4]に記載の複合体。
[7]Xが、腎臓刷子縁膜酵素又はリソソーム酵素で切断されるアミノ酸配列を有する、2~4個のアミノ酸からなるペプチドを含むペプチドリンカーである、上記[1]~[6]のいずれかに記載の複合体。
[8]S1が、-C(=O)-CH2O-(1,3-フェニレン)-C(=O)-、-C(=S)-NH-(1,4-フェニレン)-NH-C(=S)-、-NH-CH2-(1,3-フェニレン)-C(=O)-、-C(=O)-(CH2CH2O)4-(1,3-フェニレン)-C(=O)-、-CH2-(1,4-フェニレン)-NH-C(=S)-、-NH-(CH2)2-C(=O)-、-C(=O)-(1,4-フェニレン)-C(=O)-、-C(=O)-(1,3-フェニレン)-C(=O)-、-C(=O)-(CH2)2-C(=O)-、又は、結合であり、
Xが、以下の(1)~(9):
(1)-Met-Ile-NH-(CH2)2-Z1-、
(2)-Gly-Lys-Z2-、
(3)-Gly-Phe-Lys-Z2-、
(4)-Met-Val-Lys-Z2-、
(5)-Gly-Tyr-CH2-C(=O)-NH-(CH2)2-Z1-、
(6)-Gly-Lys-Lys-Z2-、
(7)-Gly-Arg-Lys-Z2-、
(8)-Gly-Lys-C(=S)-NH-(1,4-フェニレン)-NH-C(=S)-、及び
(9)-Met-Ile-NH-(CH2)2-NH-C(=S)-NH-(1,4-フェニレン)-NH-C(=S)-、
[式中、Metはメチオニンを、Ileはイソロイシンを、Glyはグリシンを、Lysはリシンを、Pheはフェニルアラニンを、Valはバリンを、Tyrはチロシンを、Argはアルギニンを、Z1は下式(II)に示される基を、-Lys-Z2-は下式(III)に示される基を、-Tyr-CH2-は下式(IV)に示される基を、-Lys-C(=S)-は下式(V)に示される基をそれぞれ示す]
からなる群より選択されるペプチドリンカーである、上記[7]に記載の複合体。
[10]Yが、DFOである、上記[1]~[9]のいずれか1項に記載の複合体。
[11]Yが、DOTAである、上記[1]~[9]のいずれかに記載の複合体。
[12]Yが、DOTAであり、
S1が、-CH2-(1,4-フェニレン)-NH-C(=S)-又は結合であり、
Xが、結合である、
上記[1]~[6]のいずれかに記載の複合体。
[13](Y-S1-X)p-Fabが、
[14](Y-S1-X)p-Fabが、
[15](Y-S1-X)p-Fabが、
[16]pが1~4の自然数である、上記[13]から[15]に記載の複合体。
[17]さらに金属を含む、上記[1]~[16]のいずれかに記載の複合体。
[18]金属が金属放射性同位元素である、上記[17]に記載の複合体。
[19]金属が89Zrである、上記[18]に記載の複合体。
[20]PETトレーサーである、上記[18]~[19]のいずれかに記載の複合体。
[21]上記[17]~[20]のいずれかに記載の1種類以上の複合体、及び薬学的に許容される担体を含む診断用組成物。
[22]早期診断薬、病期診断薬、又は術中診断薬である、上記[21]に記載の診断用組成物。
[23]ヒトMUC1を発現する癌の診断に用いる、上記[21]又は[22]に記載の診断用組成物。
[24]癌が、乳癌、肺癌、大腸癌、膀胱癌、皮膚癌、甲状腺癌、胃癌、膵臓癌、腎臓癌、卵巣癌、又は子宮頚癌である、上記[23]に記載の診断用組成物。
[25]上記[17]~[20]のいずれかに記載の1種類以上の複合体、及び薬学的に許容される担体を含む医薬組成物。
[26]ヒトMUC1を発現する癌を治療するための医薬組成物である、上記[25]に記載の医薬組成物。
[27]癌が、乳癌、肺癌、大腸癌、膀胱癌、皮膚癌、甲状腺癌、胃癌、膵臓癌、腎臓癌、卵巣癌、又は子宮頚癌である、上記[26]に記載の医薬組成物。
[28]癌の診断用組成物、及び/又は癌を治療するための医薬組成物の製造のための、上記[17]~[20]のいずれかに記載の複合体の使用。
[29]癌の診断、及び/又は癌の治療において使用するための、上記[17]~[20]のいずれかに記載の複合体。
[30]上記[17]~[20]のいずれかに記載の複合体の診断有効量を対象に投与することを含む、癌の診断方法。
[31]上記[17]~[20]のいずれかに記載の複合体の治療有効量を対象に投与することを含む、癌の治療方法。
[32] 癌の診断及び/又は癌の治療のための上記[17]~[20]のいずれかに記載の複合体の使用。
本発明の複合体は、下式(I):
(Y-S1-X)p-Fab (I)
[式中、
Fabは、抗ヒトMUC1抗体Fabフラグメントであり、
Xは、ペプチドリンカー又は結合であり、
S1は、スペーサー又は結合であり、
Yは、配位子であり、並びに、
pは、1~25の自然数であり、
但し、Xが結合であるときは、S1が-CH2-(1,4-フェニレン)-NH-C(=S)-又は結合であり、Yは1,4,7,10-テトラアザシクロドデカン-1,4,7,10-テトラ酢酸(DOTA)である]
で示される複合体である。
前記式(I)において「Fab」で示される抗ヒトMUC1抗体Fabフラグメントについて説明する。
配列番号8又は配列番号10に示されるアミノ酸配列からなる重鎖可変領域を含む重鎖フラグメント及び配列番号12に示されるアミノ酸配列からなる軽鎖可変領域を含む軽鎖を含む抗ヒトMUC1抗体Fabフラグメント。
配列番号2又は配列番号4に示されるアミノ酸配列からなる重鎖フラグメント及び配列番号6に示されるアミノ酸配列からなる軽鎖を含む抗ヒトMUC1抗体Fabフラグメント。
配列番号8又は配列番号10に示されるアミノ酸配列からなる重鎖可変領域であって、配列番号8又は配列番号10のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖可変領域を含む重鎖フラグメント、及び、配列番号12に示されるアミノ酸配列からなる軽鎖可変領域を含む軽鎖を含む、抗ヒトMUC1抗体Fabフラグメント。
配列番号10に示されるアミノ酸配列からなる重鎖可変領域であって、配列番号10のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖可変領域を含む重鎖フラグメント、及び、配列番号12に示されるアミノ酸配列からなる軽鎖可変領域を含む軽鎖を含む、抗ヒトMUC1抗体Fabフラグメント。
配列番号2又は配列番号4に示されるアミノ酸配列からなる重鎖フラグメントであって、配列番号2又は配列番号4のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖フラグメント、及び、配列番号6に示されるアミノ酸配列からなる軽鎖を含む、抗ヒトMUC1抗体Fabフラグメント。
配列番号4に示されるアミノ酸配列からなる重鎖フラグメントであって、配列番号4のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖フラグメント、及び、配列番号6に示されるアミノ酸配列からなる軽鎖を含む、抗ヒトMUC1抗体Fabフラグメント。
前記式(I)において「Y」で示される配位子について説明する。
「配位子」とは、本発明の複合体において、金属とキレート錯体を形成しうる部分であり、キレート剤から構成される基を意味する。構成される基とは、キレート剤からプロトンが除かれて、結合手を有する基である。当該キレート剤から構成される基は、抗ヒトMUC1抗体Fabフラグメントと直接、或いは、スペーサー及び/又はペプチドリンカーを介して結合するものである。
本発明の複合体は、配位子(Y)又はスペーサー(S1)とFabとが、直接結合していてもよいが、ペプチドリンカー(X)を介して結合していてもよい。前記式(I)において「X」で示されるペプチドリンカーについて説明する。
本発明の複合体は、配位子(Y)とペプチドリンカー(X)又はFabとが、直接結合していてもよいが、スペーサーを介して結合していてもよい。
本発明の複合体は、抗ヒトMUC1抗体Fabフラグメント(Fab)中の1以上のアミノ基の窒素原子もしくはジスルフィド結合由来のチオール基を介して1以上の標識部(Y-S1-X)が結合した複合体である。本発明の複合体は結合する標識部の数が互いに相違する複合体の混合物であってもよく、式(I)において、Fabは1~25の標識部(Y-S1-X)が結合したFabのいずれか又はそれらの混合物であることを示す。ある態様としては、本発明の複合体は、1つのFabに対して、1~25の標識部(Y-S1-X)を含み、ある態様としては、1~23の標識部(Y-S1-X)を含み、ある態様としては1~15の標識部(Y-S1-X)を含み、ある態様としては1~11の標識部(Y-S1-X)を含み、ある態様としては1~9の標識部(Y-S1-X)を含み、ある態様としては1~7の標識部(Y-S1-X)を含み、ある態様としては1~5の標識部(Y-S1-X)を含み、更に、ある態様としては1~4の標識部(Y-S1-X)を含む。即ち、1つのFabに対する標識部(Y-S1-X)の結合数を表す「p」は、ある態様としては1~25の自然数であり、ある態様としては1~23の自然数であり、ある態様としては1~15の自然数であり、ある態様としては1~11の自然数であり、ある態様としては1~9の自然数であり、ある態様としては1~7の自然数であり、ある態様としては1~5の自然数であり、更に、ある態様としては1~4の自然数である。
本発明の複合体に含まれる抗ヒトMUC1抗体Fabフラグメントは、ある態様では、当該抗ヒトMUC1抗体Fabフラグメントの重鎖フラグメントをコードする塩基配列を含むポリヌクレオチド、及び当該抗ヒトMUC1抗体Fabフラグメントの軽鎖をコードする塩基配列を含むポリヌクレオチドによってコードされる。
本発明の複合体に含まれる抗ヒトMUC1抗体Fabフラグメントをコードするポリヌクレオチドの発現ベクターには、当該抗ヒトMUC1抗体Fabフラグメントの重鎖フラグメントをコードする塩基配列を含むポリヌクレオチドを含む発現ベクター、当該抗ヒトMUC1抗体Fabフラグメントの軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクター、並びに当該抗ヒトMUC1抗体Fabフラグメントの重鎖フラグメントをコードする塩基配列を含むポリヌクレオチド及び当該抗ヒトMUC1抗体Fabフラグメントの軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターが含まれる。
発現ベクターで形質転換される宿主細胞には、以下の(a)~(d)からなる群より選択される宿主細胞が含まれる:
(a)抗ヒトMUC1抗体Fabフラグメントの重鎖フラグメントをコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞;
(b)抗ヒトMUC1抗体Fabフラグメントの軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞;
(c)抗ヒトMUC1抗体Fabフラグメントの重鎖フラグメントをコードする塩基配列を含むポリヌクレオチド及び抗ヒトMUC1抗体Fabフラグメントの軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞;並びに
(d)抗ヒトMUC1抗体Fabフラグメントの重鎖フラグメントをコードする塩基配列を含むポリヌクレオチドを含む発現ベクター及び抗ヒトMUC1抗体Fabフラグメントの軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞。
(a)配列番号4に示されるアミノ酸配列からなる重鎖フラグメントをコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞;
(b)配列番号6に示されるアミノ酸配列からなる軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞;
(c)配列番号4に示されるアミノ酸配列からなる重鎖フラグメントをコードする塩基配列を含むポリヌクレオチド及び配列番号6に示されるアミノ酸配列からなる軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞;並びに
(d)配列番号4に示されるアミノ酸配列からなる重鎖フラグメントをコードする塩基配列を含むポリヌクレオチドを含む発現ベクター及び配列番号6に示されるアミノ酸配列からなる軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞。
本発明の複合体に含まれる抗ヒトMUC1抗体Fabフラグメントの生産は、上記の形質転換された宿主細胞を培養し、抗ヒトMUC1抗体Fabフラグメントを発現させる工程を含む。
(a)本発明の複合体に含まれる抗ヒ卜MUC1抗体Fabフラグメン卜の重鎖フラグメントをコードする塩基配列を含むポリヌクレオチド及び本発明の複合体に含まれる抗ヒトMUC1抗体Fabフラグメントの軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞;
(b)本発明の複合体に含まれる抗ヒトMUC1抗体Fabフラグメントの重鎖フラグメントをコードする塩基配列を含むポリヌクレオチドを含む発現ベクター及び本発明の複合体に含まれる抗ヒトMUC1抗体Fabフラグメントの軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞;並びに
(c)本発明の複合体に含まれる抗ヒ卜MUC1抗体Fabフラグメントの重鎖フラグメントをコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞、及び、本発明の複合体に含まれる抗ヒ卜MUC1抗体Fabフラグメン卜の軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞。
(a)配列番号4に示されるアミノ酸配列からなる重鎖フラグメントをコードする塩基配列を含むポリヌクレオチド及び配列番号6に示されるアミノ酸配列からなる軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞;
(b)配列番号4に示されるアミノ酸配列からなる重鎖フラグメントをコードする塩基配列を含むポリヌクレオチドを含む発現ベクター及び配列番号6に示されるアミノ酸配列からなる軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞;並びに
(c)配列番号4に示されるアミノ酸配列からなる重鎖フラグメントをコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞、及び、配列番号6に示されるアミノ酸配列からなる軽鎖をコードする塩基配列を含むポリヌクレオチドを含む発現ベクターで形質転換された宿主細胞。
本発明の複合体を生産する方法には、抗ヒトMUC1抗体Fabフラグメントを、標識部(Y-S1-X)と共有結合させる工程を含めることができる。前記標識部(Y-S1-X)における各構成要素間の結合は、公知の手法により、当業者が適宜行うことができる。反応例としては、配位子(Y)を直接又はスペーサー(S1)を介してペプチドリンカー(X)に結合させた後に、前記ペプチドリンカーと抗ヒトMUC1抗体Fabフラグメントとを結合させることができる。また、抗ヒトMUC1抗体Fabフラグメントをペプチドリンカー(X)に結合させた後に、前記ペプチドリンカーと配位子(Y)とを直接又はスペーサー(S1)を介して結合させることもできる。さらに、配位子、例えばDOTAと、抗ヒトMUC1抗体Fabフラグメントとを直接公知の手法により結合させることもできる。なお、原料としてあらかじめ配位子とスペーサー(S1)とが結合した化合物を用いることもできる。
本発明は、金属を含む本発明の複合体(以下、検出可能な本発明の複合体と称する。)を含む、診断用組成物に関する。本発明の診断用組成物は、本発明の複合体を1種類以上含むものであってもよい。すなわち、本発明の診断用組成物は、本発明の複合体を1種類含むものであってもよく、または2種類以上の本発明の複合体の組合せを含むものであってもよい。検出可能な本発明の複合体は、常法に従って製剤化され、早期診断薬、又は病期診断薬(特に癌の診断薬)として利用することができる。
本発明には、90Y又は177Lu等の金属放射性同位元素を含む1種類以上の本発明の複合体及び薬学的に許容される担体を含む医薬組成物が含まれる。また、本発明の医薬組成物は、本発明の複合体を1種類含むものであってもよく、または2種類以上の本発明の複合体の組合せを含むものであってもよい。本発明の複合体は、当該分野において通常用いられている担体、即ち、薬剤用賦形剤や薬剤用担体等を用いて、通常使用される方法によって医薬組成物の調製に用いることができる。これら医薬組成物の剤型の例としては、例えば、注射剤、点滴用剤等の非経口剤が挙げられ、静脈内投与、皮下投与、膀胱内投与等により投与することができる。製剤化にあたっては、薬学的に許容される範囲で、これら剤型に応じた賦形剤、担体、添加剤等を使用することができる。
P10-1 Fab及びP10-2 Fabと称する2種類の抗ヒトMUC1抗体Fabフラグメントを作製した。
精製したP10-2 Fabのアミノ酸修飾を分析した結果、精製抗体の大部分において、重鎖N末端のグルタミンがピログルタミン酸に修飾されていることが示唆された。
本実施例における抗ヒトMUC1抗体Fabフラグメント(Fab)としては、P10-1 Fabを用いた。
なお、以下の実施例において、MS解析により確認できた各複合体のFabが結合する(Y-S1-X)の数を示しているが、その結果はそれ以外の結合数を有する複合体を含まないことを示すものではない。MS解析機器の精度の関係でその存在を確認できていない結合数の複合体が存在している可能性は残ることは理解されよう。
N-(tert-ブトキシカルボニル)グリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシンtert-ブチルエステル (11.5 g)をアニソール (2.8 mL)に溶かし、トリフルオロ酢酸(以下TFAと略称) (58 mL)を室温で滴下し、2時間撹拌した。HPLCで原料の消失と目的物の生成を確認し、反応液を減圧留去した。残渣にジエチルエーテル(200mL)を加えて析出した固体をろ取し、ジエチルエーテルで洗浄してグリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシンモノ(トリフルオロ酢酸)塩(8.70 g)を得た。MS(ESI+);284
N-(3-{[(2,5-ジオキソピロリジン-1-イル)オキシ]カルボニル}ベンゾイル)グリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシン(141 mg)をDMF(5 mL)に溶かし、N4-{5-[アセチル(ヒドロキシ)アミノ]ペンチル}-N1-(5-{4-[(5-アミノペンチル)(ヒドロキシ)アミノ]-4-オキソブタンアミド}ペンチル)-N1-ヒドロキシブタンジアミドモノメタンスルホン酸塩(177 mg)及びTEA(0.075 mL)を室温で加えた。原料が溶けにくく白濁していたのでジメチルスルホキシド(以下DMSOと略称)(5 mL)を加えて溶かし、室温で1時間撹拌した。LCMSで目的物の生成と原料の消失を確認し、TFA水溶液を加えて反応をクエンチしpHを5付近に調製した。逆相カラムクロマトグラフィー (YMC Triart C18, アセトニトリル/0.1%TFA水溶液)にて精製を行い、目的物を含むフラクションを集めて濃縮、減圧下2時間乾燥させて標題化合物(150 mg)を得た。MS(ESI+); 975
N-{3-[(3,14,25-トリヒドロキシ-2,10,13,21,24-ペンタオキソ-3,9,14,20,25-ペンタアザトリアコンタン-30-イル)カルバモイル]ベンゾイル}グリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシン(122 mg)をDMSO(8mL)とDMF(4mL)に溶かし、逆相カラムクロマトグラフィー (YMC Triart C18, アセトニトリル/0.1%TFA水溶液)にて精製した。目的物を含むフラクションを集めて濃縮、減圧下2時間乾燥させて標題化合物(19 mg)を得た。MS(ESI-); 973
0.1Mホウ酸緩衝液にて4mg/mLに調製したFab溶液に0.1Mホウ酸緩衝液にて調製した2-イミノチオラン(2-IT)溶液を加え、37℃で30分間インキュベートした。過剰の2-ITはアミコンウルトラ-0.5mL遠心式フィルター(メルクミリポア社)を用いてEDTA含有リン酸緩衝生理食塩水(pH6.0)で洗浄を3回繰り返し、最後に濃縮濾過した。
(3-ホルミルフェノキシ)酢酸ベンジルエステル(2.90 g)(Chemistry. 2015 Aug 24;21(35):12421-30.)、2-メチルプロパン-2-オール(60 mL)および水(30 mL)の混合物に、室温で2-メチルブタ-2-エン(6 mL)、ナトリウム二水素ホスファート水和物(1:1:2)(3.35 g)および亜塩素酸ナトリウム(3.64 g)を加え、2時間撹拌した。反応液に酢酸エチルと1M塩酸(60 mL)を加え、酢酸エチルで抽出した。有機層を水および飽和塩化ナトリウム水溶液で洗浄し、無水硫酸マグネシウムで乾燥、濾過した。濾液を濃縮することで標題化合物(2.93 g)を得た。MS(ESI-); 285
グリシル-N 6-[(ベンジルオキシ)カルボニル]-L-リシンtert-ブチルエステル(760 mg)、3-[2-(ベンジルオキシ)-2-オキソエトキシ]安息香酸(600 mg)およびDMF(10 mL)の混合物に、氷冷下、ヘキサフルオリドリン酸(1-)1-(ジメチルアミノ)-N,N-ジメチル-1-[(3H-[1,2,3]トリアゾロ[4,5-b]ピリジン-3-イル)オキシ]メタンイミニウム(800 mg)とジイソプロピルエチルアミン(以下DIPEAと略称)(1 mL)を加えた。室温で1時間攪拌後、その混合物に水と酢酸エチルを加え、有機層を分離後、水層を酢酸エチルで抽出した。合わせた有機層を水および飽和塩化ナトリウム水溶液で洗浄後、無水硫酸ナトリウムで乾燥し、濾過した。濾液を濃縮後、残渣をシリカゲルクロマトグラフィー(ヘキサン/酢酸エチル=90/10-0/100)で精製することで標題化合物(1.19g)を得た。MS(ESI+); 662
N-{3-[2-(ベンジルオキシ)-2-オキソエトキシ]ベンゾイル}グリシル-N 6-[(ベンジルオキシ)カルボニル]-L-リシンtert-ブチルエステル(1.18g)およびエチルアルコール(20 mL)の混合物に、室温で10%パラジウム担持炭素(50%含水、200 mg)を加えた。その混合物を、水素気流下(1 atm)室温で終夜攪拌した。その混合物を、セライトを用いて濾過後、濃縮することで標題化合物(804 mg)を得た。MS(ESI+); 438
N-[3-(カルボキシメトキシ)ベンゾイル]グリシル-L-リシンtert-ブチルエステル(600 mg)、DMF(2 mL)およびテトラヒドロフラン(4 mL)の混合物に2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-カルボン酸メチルエステル(350 mg) およびDIPEA(700 μL)を室温で加えて、60℃で加熱撹拌した。9時間後にDIPEA(500 μL)を追加し、さらに60℃で終夜撹拌した。室温まで放冷し、TFA(600 μL)で中和し、減圧濃縮して、そのまま逆相カラムクロマトグラフィー (YMC Triart C18, アセトニトリル/0.1%TFA水溶液)で精製した。目的物のフラクションを減圧濃縮し、残渣に水および酢酸エチルを加えて分液抽出し、有機層を無水硫酸マグネシウムで乾燥し、濾過した後、濾液を減圧濃縮および乾燥することで標題化合物(378 mg)を得た。MS(ESI+); 518
N 4-{5-[アセチル(ヒドロキシ)アミノ]ペンチル}-N 1-(5-{4-[(5-アミノペンチル)(ヒドロキシ)アミノ]-4-オキソブタンアミド}ペンチル)-N 1-ヒドロキシブタンジアミドモノメタンスルホン酸塩(400 mg)、N-[3-(カルボキシメトキシ)ベンゾイル]グリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシンtert-ブチルエステル(365 mg)およびDMF(4 mL)の混合物に3-{[(エチルイミノ)メチリデン]アミノ}-N,N-ジメチルプロパン-1-アミン一塩酸塩(以下EDC HClと略称)(240 mg)、1H-ベンゾトリアゾール-1-オール(以下HOBtと略称)(165 mg)およびDIPEA(500 μL) を氷冷下で加え、室温で終夜撹拌した。反応混合物をTFA(200 μL)と水(500 μL)の混合溶液で希釈し、そのまま逆相カラムクロマトグラフィー (YMC Triart C18, アセトニトリル/0.1%TFA水溶液)にて精製した。目的物のフラクションを集めて減圧濃縮し、凍結乾燥することで標題化合物(285 mg)を得た。MS(ESI-); 1059
N-{3-[(9,20,31-トリヒドロキシ-2,10,13,21,24,32-ヘキサオキソ-3,9,14,20,25,31-ヘキサアザトリトリアコンタン-1-イル)オキシ]ベンゾイル}グリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシンtert-ブチルエステル(370 mg)に、TFA(1.5 mL)を氷冷下で加え、室温で一晩撹拌した。減圧濃縮した後、DMF(4 mL)および水(500 μL)を加えて希釈し、そのまま逆相カラムクロマトグラフィー (YMC Triart C18, アセトニトリル/0.1%TFA水溶液)にて精製した。目的物のフラクションを集めて減圧濃縮し、凍結乾燥することによって標題化合物(194 mg)を得た。MS(ESI-); 1003
(vi)の化合物を用いて、実施例3-1の(iv)と同様にして複合体を得た。当該複合体は、分子量47.5kDaのFabの1つに対して、分子量1106の[DFO-C(=O)-CH2O-(1,3-フェニレン)-C(=O)-Gly-Lys-Z2]が1つ結合した複合体、及び2つ結合した複合体の混合物であることをMS解析により確認した。
氷冷下、N-(tert-ブトキシカルボニル)グリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシンtert-ブチルエステル(1 g)のジクロロメタン(12 mL)溶液にTFA(6 mL)を加え、氷冷下で2時間攪拌した。反応溶液を減圧下に濃縮することによりグリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシンtert-ブチルエステルモノ(トリフルオロ酢酸)塩(1.1 g)を得た。MS(ESI+); 340.3
2,2',2'',2'''-(1,4,7,10-テトラアザシクロドデカン-1,4,7,10-テトライル)四酢酸(320 mg)および水(12 mL)混合物に、氷冷下、1M水酸化ナトリウム水溶液(1.58 mL)を加え、pH6に調製した。その後、氷冷下、1-ヒドロキシ-2,5-ジオキソピロリジン-3-スルホン酸ナトリウム(170 mg)及びEDC HCl(150 mg)を加え30分攪拌した。0.2Mリン酸水素二ナトリウム溶液(pH9)(3 mL)を加え、pH7とした後、グリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシンtert-ブチルエステルモノ(トリフルオロ酢酸)塩(750mg)、1M水酸化ナトリウム水溶液(672 μL)及び0.2Mリン酸水素二ナトリウム溶液(pH9)(800 μL)を加えpH8とし、氷冷下2時間攪拌した。逆相シリカゲルカラムクロマトグラフィー(溶媒勾配;0→100%アセトニトリル/水(0.05%TFA水溶液))で精製することにより、標題化合物(347 mg)を得た。MS(ESI-): 726.3
N-{[4,7,10-トリス(カルボキシメチル)-1,4,7,10-テトラアザシクロドデカン-1-イル]アセチル}グリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシンtert-ブチルエステルテトラキス(トリフルオロ酢酸)塩(347 mg)の4M塩化水素/ジオキサン(3 mL)およびジクロロメタン(3 mL)混合溶液を室温で3時間攪拌した後、反応溶液を減圧下に濃縮した。残渣を逆相シリカゲルカラムクロマトグラフィー(溶媒勾配;0→100%アセトニトリル/水(0.05%TFA水溶液))で精製することにより、標題化合物(168 mg)を得た。MS(ESI+): 670
5.2mg/mLのFabのホウ酸緩衝液(100μL)に2mg/mL 2-ITの0.1Mホウ酸緩衝液(3.33μL)を加え、37℃で30分間インキュベートした。過剰の2-ITはアミコンウルトラ-0.5mL遠心式フィルターを用いEDTA含有0.1Mリン酸緩衝生理食塩水(pH6.0)で洗浄を3回繰り返し、最後に濃縮濾過した。
3-{[(tert-ブトキシカルボニル)アミノ]メチル}安息香酸(460 mg)、グリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシンtert-ブチルエステルモノ(トリフルオロ酢酸)塩(750 mg)およびジクロロメタン(15 mL)混合物に、EDC HCl(380 mg)、HOBt(110 mg)及びTEA(700 μL)を加え室温で15時間攪拌した。反応溶液を濃縮後、残渣をシリカゲルカラムクロマトグラフィー(展開溶媒;酢酸エチル)で精製することにより、標題化合物(478 mg)を得た。MS(ESI+): 595
N-(3-{[(tert-ブトキシカルボニル)アミノ]メチル}ベンゾイル)グリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシンtert-ブチルエステル(478 mg)のTFA(1.5 mL)およびジクロロメタン(3 mL)混合物を室温で30分攪拌した。反応溶液を減圧下に濃縮することにより、標題化合物(500 mg)を得た。MS(ESI+): 473
N-[3-(アミノメチル)ベンゾイル]グリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシンtert-ブチルエステルモノ(トリフルオロ酢酸)塩(489mg)を用いて、上記実施例3-5の工程(i)と同様にして、表題化合物(160 mg)を得た。MS(ESI-): 857
N-[3-({2-[4,7,10-トリス(カルボキシメチル)-1,4,7,10-テトラアザシクロドデカン-1-イル]アセトアミド}メチル)ベンゾイル]グリシル-6-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)-L-ノルロイシンtert-ブチルエステルテトラキス(トリフルオロ酢酸)塩(160 mg)を用いて、上記実施例3-5の工程(ii)と同様にして、表題化合物(80 mg)を得た。MS(ESI+): 803
(iv)の化合物を用いて、上記実施例3-5の工程(iii)の工程と同様にして、複合体を得た。当該複合体は、分子量47.5kDaのFabの1つに対して、分子量905の[DOTA-NH-CH2-(1,3-フェニレン)-C(=O)-Gly-Lys-Z2]が1つ結合した複合体、2つ結合した複合体、及び3つ結合した複合体の混合物であることをMS解析により確認した。
2,2',2'',2'''-(1,4,7,10-テトラアザシクロドデカン-1,4,7,10-テトライル)四酢酸(330 mg)および水(16 mL)混合物に、氷冷下、1M水酸化ナトリウム水溶液(1.6 mL)を加え、pH6に調製した。その後、氷冷下、1-ヒドロキシ-2,5-ジオキソピロリジン-3-スルホン酸ナトリウム(90 mg)及び、EDC HCl(80 mg)を加え30分攪拌した。0.2Mリン酸水素二ナトリウム溶液(pH9)(3 mL)を加え、pH7とした後、L-メチオニル-N 1-[2-(2,5-ジオキソ-2,5-ジヒドロ-1H-ピロール-1-イル)エチル]-L-イソロイシンアミド一塩酸塩(100 mg)(Bioconjug Chem. 2014 Nov 19;25(11):2038-45.)、1M水酸化ナトリウム水溶液(570 μL)を加え、約pH8とし、氷冷下2時間攪拌した。逆相シリカゲルカラムクロマトグラフィー(アセトニトリル/0.05%TFA水溶液)で精製することにより標題化合物(98 mg)を得た。MS(ESI-): 769
(i)の化合物を用いて、上記実施例3-5の工程(iii)の工程と同様にして、複合体を得た。当該複合体は、分子量47.5kDaのFabの1つに対して、分子量873の[DOTA-Met-Ile-NH-(CH2)2-Z1]が1つ結合した複合体、2つ結合した複合体、及び3つ結合した複合体の混合物であることをMS解析により確認した。
実施例1の方法で発現させたP10-1 Fab及びP10-2 Fabについて、ヒト癌特異的MUC1に対する結合活性をCell ELISA法によりキメラ1B2抗体Fabフラグメント(以下、1B2 Fabと表記することがある。1B2抗体(特許文献1)のVHドメイン及びVLドメイン(配列情報は特許文献1から引用)に、ヒトIgG1のCH1ドメイン、κ鎖のCLドメインをそれぞれ連結して作製した。CH1ドメイン及びCLドメインを連結する都合上、VHドメインのKabatらによるEUインデックスに基づく113番目のアラニン残基がセリン残基に、VLドメインのKabatらによるEUインデックスに基づく109番目のアラニン残基がスレオニン残基に置換されている。)と比較した。すなわち、ヒト癌特異的MUC1を発現する乳癌細胞株T-47D細胞(ATCCより購入可能;HTB-133)を1ウェルあたり0.75×104細胞、コラーゲンIでコートした96ウェルELISAプレートに播種し、一晩培養後、細胞をホルマリンで固定化し、それに対して上記P10-1 Fab、P10-2 Fab又は1B2 Fabを反応させた後、二次抗体として西洋ワサビペルオキシダーゼ(Horseradish Peroxidase:HRP)標識ヤギ抗ヒトIgκ抗体(Southern Biotechnology Associates社)を反応させ、ECL Prime Western Blotting Detection Reagent(GE Healthcare社)を加えて発光させ、その発光度を調べた。その結果、図1に示したようにP10-1 Fab及びP10-2 Fabは1B2 Fabの約10倍以上のヒト癌特異的MUC1に対する結合活性を持つことが確認された。
実施例3の方法で作製した各抗ヒトMUC1抗体Fabフラグメント複合体について、ヒト癌特異的MUC1に対する結合活性を評価するためにELISA法を行った。
サンプルNo.5:[DOTA-Gly-Lys-Z2]p-Fab
サンプルNo.6:[DOTA-NH-CH2-(1,3-フェニレン)-C(=O)-Gly-Lys-Z2]p-Fab
サンプルNo.7:[DOTA-Met-Ile-NH-(CH2)2-Z1]p-Fab
サンプルNo.3:[DOTA-CH2-(1,4-フェニレン)-NH-C(=S)]p-Fab
サンプルNo.4:[DOTA]p-Fab
サンプルNo.1:[DFO-C(=O)-(1,3-フェニレン)-C(=O)-Gly-Lys-Z2]p-Fab
サンプルNo.2:[DFO-C(=O)-CH2O-(1,3-フェニレン)-C(=O)-Gly-Lys-Z2]p-Fab
配列番号2:P10-1 Fab重鎖フラグメントのアミノ酸配列
配列番号3:P10-2 Fab重鎖フラグメントをコードするDNAの塩基配列
配列番号4:P10-2 Fab重鎖フラグメントのアミノ酸配列
配列番号5:抗体軽鎖をコードするDNAの塩基配列
配列番号6:抗体軽鎖のアミノ酸配列
配列番号7:P10-1 Fab重鎖可変領域をコードするDNAの塩基配列
配列番号8:P10-1 Fab重鎖可変領域のアミノ酸配列
配列番号9:P10-2 Fab重鎖可変領域をコードするDNAの塩基配列
配列番号10:P10-2 Fab重鎖可変領域のアミノ酸配列
配列番号11:抗体軽鎖可変領域をコードするDNAの塩基配列
配列番号12:抗体軽鎖可変領域のアミノ酸配列
配列番号13:重鎖シグナル配列
配列番号14:軽鎖シグナル配列
配列番号15:MUC1の細胞外ドメインのタンデムリピート配列
Claims (32)
- 下式(I):
(Y-S1-X)p-Fab (I)
[式中、
Fabは、以下の(a)及び(b):
(a)配列番号8又は配列番号10に示されるアミノ酸配列からなる重鎖可変領域を含む重鎖フラグメント及び配列番号12に示されるアミノ酸配列からなる軽鎖可変領域を含む軽鎖を含む抗ヒトMUC1抗体Fabフラグメント、及び
(b)配列番号8又は配列番号10に示されるアミノ酸配列からなる重鎖可変領域であって、配列番号8又は配列番号10のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖可変領域を含む重鎖フラグメント、及び、配列番号12に示されるアミノ酸配列からなる軽鎖可変領域を含む軽鎖を含む、抗ヒトMUC1抗体Fabフラグメント、
からなる群より選択される、抗ヒトMUC1抗体Fabフラグメントであり;
Xは、ペプチドリンカー又は結合であり;
S1は、スペーサー又は結合であり;
Yは、配位子であり;並びに、
pは、1~25の自然数であり;
但し、Xが結合であるときは、S1が-CH2-(1,4-フェニレン)-NH-C(=S)-又は結合であり、Yは1,4,7,10-テトラアザシクロドデカン-1,4,7,10-テトラ酢酸(DOTA)である]
で示される複合体。 - Fabが、以下の(a)及び(b):
(a)配列番号2又は配列番号4に示されるアミノ酸配列からなる重鎖フラグメント及び配列番号6に示されるアミノ酸配列からなる軽鎖を含む抗ヒトMUC1抗体Fabフラグメント;及び
(b)配列番号2又は配列番号4に示されるアミノ酸配列からなる重鎖フラグメントであって、配列番号2又は配列番号4のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖フラグメント、及び、配列番号6に示されるアミノ酸配列からなる軽鎖を含む、抗ヒトMUC1抗体Fabフラグメント;
からなる群より選択される、請求項1に記載の複合体。 - Fabが、以下の(a)及び(b):
(a)配列番号10に示されるアミノ酸配列からなる重鎖可変領域を含む重鎖フラグメント及び配列番号12に示されるアミノ酸配列からなる軽鎖可変領域を含む軽鎖を含む抗ヒトMUC1抗体Fabフラグメント;及び
(b)配列番号10に示されるアミノ酸配列からなる重鎖可変領域であって、配列番号10のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖可変領域を含む重鎖フラグメント、及び、配列番号12に示されるアミノ酸配列からなる軽鎖可変領域を含む軽鎖を含む、抗ヒトMUC1抗体Fabフラグメント;
からなる群より選択される、請求項1に記載の複合体。 - Fabが、以下の(a)及び(b):
(a)配列番号4に示されるアミノ酸配列からなる重鎖フラグメント及び配列番号6に示されるアミノ酸配列からなる軽鎖を含む抗ヒトMUC1抗体Fabフラグメント;及び
(b)配列番号4に示されるアミノ酸配列からなる重鎖フラグメントであって、配列番号4のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖フラグメント、及び、配列番号6に示されるアミノ酸配列からなる軽鎖を含む、抗ヒトMUC1抗体Fabフラグメント;
からなる群より選択される、請求項2に記載の複合体。 - Fabが、配列番号4に示されるアミノ酸配列からなる重鎖フラグメント、及び配列番号6に示されるアミノ酸配列からなる軽鎖を含む抗ヒトMUC1抗体Fabフラグメントである、請求項4に記載の複合体。
- Fabが、配列番号4に示されるアミノ酸配列からなる重鎖フラグメントであって、配列番号4のアミノ酸番号1のグルタミンがピログルタミン酸に修飾された重鎖フラグメント、及び、配列番号6に示されるアミノ酸配列からなる軽鎖を含む抗ヒトMUC1抗体Fabフラグメントである、請求項4に記載の複合体。
- Xが、腎臓刷子縁膜酵素又はリソソーム酵素で切断されるアミノ酸配列を有する、2~4個のアミノ酸からなるペプチドを含むペプチドリンカーである、請求項1~6のいずれか1項に記載の複合体。
- S1が、-C(=O)-CH2O-(1,3-フェニレン)-C(=O)-、-C(=S)-NH-(1,4-フェニレン)-NH-C(=S)-、-NH-CH2-(1,3-フェニレン)-C(=O)-、-C(=O)-(CH2CH2O)4-(1,3-フェニレン)-C(=O)-、-CH2-(1,4-フェニレン)-NH-C(=S)-、-NH-(CH2)2-C(=O)-、-C(=O)-(1,4-フェニレン)-C(=O)-、-C(=O)-(1,3-フェニレン)-C(=O)-、-C(=O)-(CH2)2-C(=O)-、又は、結合であり、
Xが、以下の(1)~(9):
(1)-Met-Ile-NH-(CH2)2-Z1-、
(2)-Gly-Lys-Z2-、
(3)-Gly-Phe-Lys-Z2-、
(4)-Met-Val-Lys-Z2-、
(5)-Gly-Tyr-CH2-C(=O)-NH-(CH2)2-Z1-、
(6)-Gly-Lys-Lys-Z2-、
(7)-Gly-Arg-Lys-Z2-、
(8)-Gly-Lys-C(=S)-NH-(1,4-フェニレン)-NH-C(=S)-、及び
(9)-Met-Ile-NH-(CH2)2-NH-C(=S)-NH-(1,4-フェニレン)-NH-C(=S)-、
[式中、Metはメチオニンを、Ileはイソロイシンを、Glyはグリシンを、Lysはリシンを、Pheはフェニルアラニンを、Valはバリンを、Tyrはチロシンを、Argはアルギニンを、Z1は下式(II)に示される基を、-Lys-Z2-は下式(III)に示される基を、-Tyr-CH2-は下式(IV)に示される基を、-Lys-C(=S)-は下式(V)に示される基をそれぞれ示す]
からなる群より選択されるペプチドリンカーである、請求項7に記載の複合体。
- Yが、デフェロキサミン(DFO)又は1,4,7,10-テトラアザシクロドデカン-1,4,7,10-テトラ酢酸(DOTA)である、請求項1~8のいずれか1項に記載の複合体。
- Yが、DFOである、請求項1~9のいずれか1項に記載の複合体。
- Yが、DOTAである、請求項1~9のいずれか1項に記載の複合体。
- Yが、DOTAであり、
S1が、-CH2-(1,4-フェニレン)-NH-C(=S)-又は結合であり、
Xが、結合である、
請求項1~6のいずれか1項に記載の複合体。 - pが1~4の自然数である、請求項13から15に記載のいずれか1項に記載の複合体。
- さらに金属を含む、請求項1~16のいずれか1項に記載の複合体。
- 金属が金属放射性同位元素である、請求項17に記載の複合体。
- 金属が89Zrである、請求項18に記載の複合体。
- PETトレーサーである、請求項18~19のいずれか1項に記載の複合体。
- 請求項17~20のいずれか1項に記載の1種類以上の複合体、及び薬学的に許容される担体を含む診断用組成物。
- 早期診断薬、又は病期診断薬である、請求項21に記載の診断用組成物。
- ヒトMUC1を発現する癌の診断に用いる、請求項21又は22に記載の診断用組成物。
- 癌が、乳癌、肺癌、大腸癌、膀胱癌、皮膚癌、甲状腺癌、胃癌、膵臓癌、腎臓癌、卵巣癌、又は子宮頚癌である、請求項23に記載の診断用組成物。
- 請求項17~20のいずれか1項に記載の1種類以上の複合体、及び薬学的に許容される担体を含む医薬組成物。
- ヒトMUC1を発現する癌を治療するための医薬組成物である、請求項25に記載の医薬組成物。
- 癌が、乳癌、肺癌、大腸癌、膀胱癌、皮膚癌、甲状腺癌、胃癌、膵臓癌、腎臓癌、卵巣癌、又は子宮頚癌である、請求項26に記載の医薬組成物。
- 癌の診断用組成物、及び/又は癌を治療するための医薬組成物の製造のための、請求項17~20のいずれか1項に記載の複合体の使用。
- 癌の診断、及び/又は癌の治療において使用するための、請求項17~20のいずれか1項に記載の複合体。
- 請求項17~20のいずれか1項に記載の複合体の診断有効量を対象に投与することを含む、癌の診断方法。
- 請求項17~20のいずれか1項に記載の複合体の治療有効量を対象に投与することを含む、癌の治療方法。
- 癌の診断及び/又は癌の治療のための請求項17~20のいずれか1項に記載の複合体の使用。
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR112020023420A BR112020023420A8 (pt) | 2018-05-17 | 2019-05-17 | Complexo tendo fragmento fab de anticorpo anti-muc1 humano, peptídeo ligador e/ou ligante |
| CN201980032860.4A CN112135841A (zh) | 2018-05-17 | 2019-05-17 | 包含抗人MUC1抗体Fab片段、肽接头和/或配体的复合物 |
| MX2020012351A MX2020012351A (es) | 2018-05-17 | 2019-05-17 | Complejo que tiene fragmento fab de anticuerpo anti-muc1 de humano, enlazador peptido y/o ligando. |
| KR1020207034388A KR20210011941A (ko) | 2018-05-17 | 2019-05-17 | 항인간 MUC1 항체 Fab 프래그먼트, 펩티드 링커 및/또는 배위자를 포함하는 복합체 |
| US17/055,799 US12202908B2 (en) | 2018-05-17 | 2019-05-17 | Complex having anti-human MUC1 antibody Fab fragment, peptide linker and/or ligand |
| CA3100317A CA3100317A1 (en) | 2018-05-17 | 2019-05-17 | Complex having anti-human muc1 antibody fab fragment, peptide linker and/or ligand |
| JP2020519943A JP7360766B2 (ja) | 2018-05-17 | 2019-05-17 | 抗ヒトMUC1抗体Fabフラグメント、ペプチドリンカー及び/又は配位子を含む複合体 |
| EP19804452.1A EP3795590A4 (en) | 2018-05-17 | 2019-05-17 | COMPLEX WITH ANTI-HUMAN MUC1 ANTIBODY FAB FRAGMENT, PEPTIDE LINKER AND/OR LIGAND |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-095461 | 2018-05-17 | ||
| JP2018095461 | 2018-05-17 |
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| Publication Number | Publication Date |
|---|---|
| WO2019221269A1 true WO2019221269A1 (ja) | 2019-11-21 |
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| PCT/JP2019/019663 Ceased WO2019221269A1 (ja) | 2018-05-17 | 2019-05-17 | 抗ヒトMUC1抗体Fabフラグメント、ペプチドリンカー及び/又は配位子を含む複合体 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US12202908B2 (ja) |
| EP (1) | EP3795590A4 (ja) |
| JP (1) | JP7360766B2 (ja) |
| KR (1) | KR20210011941A (ja) |
| CN (1) | CN112135841A (ja) |
| BR (1) | BR112020023420A8 (ja) |
| CA (1) | CA3100317A1 (ja) |
| MX (1) | MX2020012351A (ja) |
| WO (1) | WO2019221269A1 (ja) |
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| US11667724B2 (en) | 2017-07-07 | 2023-06-06 | Astellas Pharma Inc. | Anti-human CEACAM5 antibody Fab fragment |
| US11679166B2 (en) | 2016-11-18 | 2023-06-20 | Astellas Pharma Inc. | Anti-human MUC1 antibody Fab fragment |
| US12065503B2 (en) | 2018-10-10 | 2024-08-20 | Astellas Pharma Inc. | Pharmaceutical composition containing tagged site-antihuman antibody fab fragment complex |
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| US11667724B2 (en) | 2017-07-07 | 2023-06-06 | Astellas Pharma Inc. | Anti-human CEACAM5 antibody Fab fragment |
| US12202908B2 (en) | 2018-05-17 | 2025-01-21 | Astellas Pharma Inc. | Complex having anti-human MUC1 antibody Fab fragment, peptide linker and/or ligand |
| US12065503B2 (en) | 2018-10-10 | 2024-08-20 | Astellas Pharma Inc. | Pharmaceutical composition containing tagged site-antihuman antibody fab fragment complex |
| WO2021177390A1 (ja) | 2020-03-04 | 2021-09-10 | 日本メジフィジックス株式会社 | 化合物及び放射性標識化合物 |
| WO2022186311A1 (ja) | 2021-03-04 | 2022-09-09 | 日本メジフィジックス株式会社 | 化合物及び放射性標識化合物 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2019221269A1 (ja) | 2021-05-27 |
| BR112020023420A2 (pt) | 2021-10-05 |
| MX2020012351A (es) | 2021-01-29 |
| US12202908B2 (en) | 2025-01-21 |
| CA3100317A1 (en) | 2019-11-21 |
| KR20210011941A (ko) | 2021-02-02 |
| CN112135841A (zh) | 2020-12-25 |
| US20210340276A1 (en) | 2021-11-04 |
| JP7360766B2 (ja) | 2023-10-13 |
| EP3795590A1 (en) | 2021-03-24 |
| BR112020023420A8 (pt) | 2022-07-05 |
| EP3795590A4 (en) | 2022-05-04 |
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