WO1999051739A1 - Proteinvariante des net1-locus - Google Patents
Proteinvariante des net1-locus Download PDFInfo
- Publication number
- WO1999051739A1 WO1999051739A1 PCT/EP1999/002224 EP9902224W WO9951739A1 WO 1999051739 A1 WO1999051739 A1 WO 1999051739A1 EP 9902224 W EP9902224 W EP 9902224W WO 9951739 A1 WO9951739 A1 WO 9951739A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nucleic acid
- protein
- seq
- sequence
- net1
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/82—Translation products from oncogenes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
- G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
- G01N33/5011—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics for testing antineoplastic activity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/574—Immunoassay; Biospecific binding assay; Materials therefor for cancer
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K48/00—Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2500/00—Screening for compounds of potential therapeutic value
- G01N2500/04—Screening involving studying the effect of compounds C directly on molecule A (e.g. C are potential ligands for a receptor A, or potential substrates for an enzyme A)
Definitions
- the present invention relates to a new protein, a variant of NET1 and the nucleic acid which codes for the new protein.
- the present invention also relates to a pharmaceutical composition containing the new protein and a method for diagnosis in which the new protein is detected. and screening methods for the identification of molecules with an antmeoplastic effect and / or with an effect on apoptosis processes
- NET1 Neuroepithelioma-transforming gene 1 is an oncogene isolated from neuroepithelial cells by cDNA expression cloning.
- a cDNA clone was isolated which codes for a 54 kDa protein. Closer analysis of the cDNA clone showed that the clone contained an incomplete 5 'end. With the aid of the truncated cDNA clone, the complete coding sequence of the corresponding gene was isolated. Sequence analysis showed that the complete clone encoded an additional 145 amino acids at the 5' term.
- the complete cDNA The clone showed no transforming activity in the NIH3T3 assay, in which the induction of focus formation is used as an indicator for the transforming activity of a protein.
- the cDNA clone shortened at the 5 'end showed transforming activity in the NIH3T3 assay.
- the shortened cDNA clone however, represented a cloning artifact and does not represent a transcript actually occurring in vivo remains the biological significance of the gene product of the NET1 locus is unclear (Vgl Chan et al 1996)
- Rho-A, -B, -C, Rad and Cdc42Hs Guanm nucleotide exchange factors
- GEF factors contain a further domain in addition to the characteristic DH domain (Pleckstrin Homology Domain, PH), the products the phosphatidyl-inositol-3-nucleus (PI3K) binds (Han et al, 1998) In this way two different signal transduction pathways (Rho and PI3K) are connected to each other
- the present invention was based on the technical problem of identifying further genes and gene products which are involved in the regulation of cell reproduction and / or apoptosis.
- This object is achieved according to the invention by a protein variant of NET1, comprising amino acids 1 to 30 of the sequence according to SEQ ID No. 1 and derivatives derived therefrom, obtained by substitution, addition, insertion and / or deletion, and coding for this by a nucleic acid
- this problem is solved by the protein and the corresponding nucleic acid specified as well as by an oligonucleotide that hybridizes specifically with a nucleic acid specified above. and an antibody which is specific for a protein specified above.
- This problem is also solved by a diagnostic method in which an above-mentioned given protein or a nucleic acid specified above is detected in a patient sample
- the present invention was based on the technical problem of specifying methods with which molecules with an antineoplastic effect or with an apoptosis-influencing effect can be identified
- this problem is solved by bringing the molecules to be examined into contact with a sample which contains an above-mentioned protein or a corresponding nucleic acid
- Figure 1 shows the schematic representation of the gene trap integration into an alternative exon of NET1
- FIG. 2 shows the induction of the NET1 A according to the invention in FDCP1 cells withdrawn from IL3
- FIG. 3 shows the induction of NET1A in differentiating embryonic stem cells
- FIG. 4 shows the restriction map of various expression vectors with NET1 or the NET1A according to the invention
- the protein according to the invention is a transforming protein which differs from the non-transforming proto-oncogene product NET1-cl24, the previously known protein of the NET1 locus in that it has an alternative N-terminus.
- the protein NET1A according to the invention represents the product of an alternative transcript of NET1 -Locus and as such, ie without further truncations, is transformative in the NIH3T3 assay. Without being bound by any theory, it is assumed that the new oncogene product exerts its transforming property by activating the Rho signal transduction pathway (cf. also Hart et al 1994)
- the invented Protein according to the invention thus relates to a new transforming gene product which can either directly or indirectly lead to the development of cancer.
- NET1A is induced in hematopoietic cells during apoptosis. It can therefore be assumed that it is directly or indirectly at the Regulation of programmed cell death is involved The induction of the gene product in hematopoietic cells during apoptosis ultimately also led to the identification and cloning of the gene product.
- the identification of the alternative NET1 gene product was carried out with the help of gene gene integration, which was designed to identify transiently expressed genes ( see PCT / EP97 / 06816, Russ et al, 1996) It can be assumed that the protein according to the invention plays a central role in the regulation of the cell cycle, with on the one hand deregulation of the cell cycle for uncontrolled cell proliferation and thus ultimately for tumors Development, and on the other hand can lead to increased cell death. This means that the provision of the protein variant according to the invention opens up the possibility, by influencing the activity of the protein according to the invention, to regulate the deregulated cell proliferation in such a way that the increased cell proliferation and / or the increased cell death are reversed can be
- a preferred protein according to the invention comprises the first 30 amino acids from M to Q in the sequence of SEQ ID No. 1. These amino acids are encoded by the hitherto unknown alternative exon of the NET1 locus. Also included are variants of this protein which can be obtained by substitution, addition, Deriving insertion and / or deletion of one or more amino acids, whereby this change in the protein sequence changes the biological activity less than factor 5, preferably less than factor 2, compared to the protein with the sequence according to SEQ ID No. 1 understood how it is obtained in the NIH3T3 focus imaging assay as described in Baasner et al (1996). The preparation of the further protein derivatives is readily known to the person skilled in the art.
- Another preferred protein comprises the first 3 0 amino acids of M to Q according to SEQ ID No. 2
- Further preferred proteins are those which comprise the sequence according to SEQ ID No. 1 or SEQ ID No. 2.
- An inversion of protein segments is also recorded, inversions ultimately also being a substitution of one or more amino acids on the corresponding ones Positions can be viewed
- nucleic acids according to the invention are those which comprise a sequence which code for a protein of the type described above. Also included are complementary nucleic acids.
- the nucleic acid according to the invention is preferably selected from a) nucleic acid molecules which are suitable for a protein with SEQ ID No.
- nucleic acid molecules mentioned under a) to d) encodes, b) nucleic acid molecules that code for a protein derivative specified above, c) nucleic acid molecules that hybridize with the molecules according to a) and / or b), d) nucleic acid molecules whose sequence is degenerate due to the genetic code compared to the sequences of under a), b) or c) the nucleic acid molecules mentioned and e) fragments, derivatives or allelic variants of the nucleic acid molecules mentioned under a) to d)
- a preferred group of nucleic acid molecules are those which hybridize with the sequence according to SEQ ID No. 3 and preferably code for a protein with the biological activity of NET1A.
- Particular preference is given to nucleic acids which hybridize with sequence ID No. 3 and sequences which are complementary thereto specifically, that the person skilled in the art can set the hybridization conditions in such a way that the hybridizing sequence results only in the background DNA with the target DNA according to SEQ ID No. 3
- the oligonucleotide according to the invention comprises at least 6, preferably at least 12 and particularly preferably at least 18 nucleotides and hybridizes specifically with one of the nucleic acid molecules described above.
- An oligonucleotide of the type mentioned which hybridizes specifically with a nucleic acid which codes for SEQ ID No. 1 or 2 is particularly preferred. Also preferred are those oligonucleotides that hybridize specifically with the sequence according to SEQ ID No. 3 and / or No. 4, and the oligonucleotides complementary thereto.
- a particular area of application of the oligonucleotides according to the invention is the detection of nucleic acid in patient material which codes for the NETIA protein according to the invention.
- the selection of the hybridization conditions for the specific detection of the nucleic acid in the patient material lies in the skill of the art. For example, by selecting the oligonucleotide sequence, oligonucleotide length and / or the hybridization conditions, such as temperature and buffer composition, he can choose the conditions such that a signal is obtained with the oligonucleotide sample only when the nucleic acid to be detected is present in the patient material.
- the respective conditions such as are used, for example, to carry out the Southern blot analysis, are described in detail in Maniatis et al. (1989).
- the oligonucleotide according to the invention serves as a primer for the detection of the nucleic acid by means of PCR.
- the hybridization and reaction conditions to be selected for this are also familiar to the person skilled in the art. The person skilled in the art can easily choose the suitable oligonucleotides on the basis of the sequences described herein.
- the recombinant nucleic acid according to the invention contains a nucleic acid or an oligonucleotide as described above.
- the recombinant nucleic acid as well as the nucleic acid according to the invention and the oligonucleotide according to the invention are preferably DNA.
- the usual cloning and / or expression vectors come into consideration as recombinant nucleic acid molecules. Any nucleic acid in which a nucleic acid or an oligonucleotide is linked to a further nucleic acid as described above is regarded as recombinant nucleic acid, the further nucleic acid usually not being present in the natural environment of the nucleic acid according to the invention.
- Suitable vector systems for combination Ren with the nucleic acid according to the invention or the oligonucleotide are also described in Maniatis et al (1989)
- the kit according to the invention contains the materials which are necessary for the detection of the protein according to the invention and / or the nucleic acid coding therefor in a given sample material.
- the sample material is preferably patient material in which the protein or the corresponding nucleic acid, in particular the NET1A transcript.
- the kit contains oligonucleotides which are suitable as a polymer for the detection of the nucleic acid according to the invention by means of PCR.
- the kit can also contain an antibody which is specific for the invention Protein The kit is then suitable, for example, for the detection of NET1 A in patient material by Western blotting
- a polyclonal antiserum can be produced by administering the protein according to the invention to a nipple.
- a polyclonal antiserum can be produced by administering the protein according to the invention to a nipple.
- the antibody is directed against a protein segment from the amino terminus of the protein according to the invention. In a further, particularly preferred embodiment, the antibody reacts with the protein segment from positions 1 to 30 in the sequence according to SEQ ID No. 1
- the proteins, nucleic acids or antibodies according to the invention are preferably used as an active ingredient in a pharmaceutical composition. If the indication indicates that the body's own NET1A protein level is to be used. the protein according to the invention can be administered directly as part of a pharmaceutical composition. Alternatively, the level of N ET 1 transcript can also be increased by gene therapy measures. For this purpose, the nucleic acid according to the invention can be administered to the patient under the control of a strong promoter
- the present invention also opens up the possibility of lowering the expression levels of the protein and / or its biological action.
- a nucleic acid according to the invention which is controlled by a strong promoter in antisense orientation, can be introduced into the organism.
- the expression of the nucleic acid according to the invention in antisense orientation has the result that the translation of the NET1A transcept is blocked in vivo and thus less protein according to the invention is produced.
- the biological activity of the protein can be decreased by administering an antibody that is specifically directed against the protein.
- the present invention further provides a method for diagnosing a predisposition to cancer or diagnosing cancer.
- the protein according to the invention has transforming activity in the NIH3T3 focus formation test.
- the protein is significantly involved in the Deregulation of the cell cycle is involved.
- the (over) expression of NET1 A can lead to an uncontrolled cell proliferation, the latter ultimately leading to the occurrence of cancer.
- the detection of the amount of protein according to the invention in a patient sample can provide an indication of the Giving the risk and / or the severity of cancer
- the nucleic acid coding therefor can also be used as a diagnostic marker.
- the amount of transcript which codes for a protein with the sequence according to SEQ ID No. 1 can be used as a measure s a how high the risk or how advanced a cancer is
- the diagnostic marker NETIA protein or allelic variants thereof can be determined, for example, with the aid of immunological detection reactions.
- the proteins of the patient material can be separated electrophoretically and transferred to a solid support.
- the diagnostic marker NET1A is then detected, for example, by adding the Antibody according to the invention, as in the Western blot method.
- the nucleic acid according to the invention serves as a diagnostic marker.
- the transcript which codes for the protein according to the invention can be detected in the context of Southern blot analyzes Detect transknpt in addition to other transcripts, possibly also from the NET1 locus, by using a sample that is specific for the portion of this nucleic acid encoding the first 30 amino acids Section corresponds to the first alternative exon, as indicated schematically in FIG. 1.
- the transknpt for NET1 A according to the invention can also be distinguished by size from the non-transforming NET1 transknpt.
- the transknpt according to the invention is approximately 150 nucleotides shorter than the non-transforming NET1 transknpt The latter codes for a protein product that is about 53 amino acids longer than NET1A
- the nucleic acid according to the invention as a diagnostic marker can also be specifically detected by PCR.
- a primer can be used which is specific for the nucleic acid comprising the alternative exon, while the second primer can be chosen as desired within the overall sequence the transcript containing the alternative exon is amplified and thus detected. Detection of the transcript according to the invention via its modified transcript length is also possible in this way.
- the additional cleavage of the amplified nucleic acid with restriction enzymes offers another possibility between the transknpt according to the invention and the further transcripts of the cell differentiate
- the present invention opens up the possibility of identifying molecules with an antineopiastic effect.
- the molecule to be examined can be brought into contact with a sample which contains the protein according to the invention and / or the nucleic acid according to the invention.
- the protein according to the invention plays a role Role in the neoplastic transformation, it being assumed that the risk of a neoplastic transformation increases with the increased expression of the protein.
- the screening method according to the invention it is thus possible, for example, to test molecules which have an influence on the expression level of the protein according to the invention
- the expression rate of the protein according to the invention of an untreated cell is compared with the expression rate of a cell after contact with the molecule to be tested
- NET1A is induced in hematopoietic cells during apoptosis and is involved in the regulation of programmed cell death. Accordingly, within the scope of the present invention, substances can be tested for their potential Influence on apoptosis processes can be tested by examining to what extent the molecules lead to an altered expression of the protein according to the invention or to an altered biological activity of the protein
- the present invention also makes it possible to provide the protein according to the invention in large quantities by providing the means required for recombinant production.
- a recombinant nucleic acid which codes for the desired protein is exposed in a host cell.
- the usual prokaryotic and eu caryotic host organisms and expression systems are considered.
- the individual measures for the recombinant production of a protein are known to the person skilled in the art and can be found, for example, in Maniatis et al (1989).
- FIG. 2 shows that NET1 A is induced as early as 0.5 hours after IL3 withdrawal. This can be seen from FIG.
- Regions coding for NET1 and NET1A were amplified with exon-1-specific and common 3'-primes from differentiating ES cells and cloned into the retroviral expression vector MLDelSM401 (cf. Hildinger et al, 1998). The specific numbers were as follows
- the NET1 variants were amplified using the pfu polymerase (strategy) according to the manufacturer's instructions.
- the constructs pMLdelAstopl (contains NET1A, see FIG. 4A) and pMLdelBstop4 (contains NET1, see FIG. 4B) were transfected into ecotropic ⁇ nx packaging cells ( see Pear et al, 1993) After 24 hours of incubation, the NIH3T3 cells were infected with ⁇ nx virus supernatants. Stable NET1A and NET1 expressing clones were determined by "limiting 13
- the plasmid pUC19 is based on the retroviral expression vectors specified above
- NET1A, NET1A4 and NET1A7 are clones which express the new splice variant (NET ⁇ A).
- NET1 B2, NET1 B6 and NET1 B9 are clones which express the known splice variant (NET1)
- the FDCP1 cells were supplemented with 10% (v / v) at concentrations of 1 ⁇ 10 6 cells per ml in Dul becco's modified Eagles Medium (DMEM Gibco). 14
- fetal calf serum Hyclone, Utah, USA
- 5 ng / ml recombinant mouse IL3 Novartis
- D3 ES cells (from Melchner et al., 1992) were exposed to irradiated (32Gy) feeder cells in DMEM, 15% FCS (Linaris, Bettingen), 100 mM non-essential amino acids (GibcoBRL), 0.1 mM ⁇ - Mercaptoethanol (Sigma), 1000 U / ml LIF (Esgro®; GibcoBRL) grown. Differentiation was induced in DMEM, 20% FCS, 0.3 mM ß-mercaptoethanol and 100 mM non-essential amino acids in the absence of LIF and feeder cells in bacterial petri dishes. Under these conditions, so-called “embryoid bodies" are formed (Doetschman et. Al, 1985).
- Reaction batch A 1 ⁇ l rHex (0.2 ⁇ g / ⁇ l) 1 ⁇ l RNA (1 ⁇ g / ⁇ l) 9 ⁇ l H 2 0 (RNase-free)
- Reaction batch B 6 ⁇ l 5 x RT buffer (GibcoBRL)
- Reaction batch A was heated to 65 ° C. for 10 min, cooled on ice and then added to reaction batch B. The reaction mixture was then heated from 30 ° C. to 45 ° C. over 15 minutes and incubated at this temperature for a further 1.5 hours. After inactivation at 65 ° C. for 30 min, 1 ⁇ l of the reverse transcription product was used for the PCR.
- the PCR was carried out with Gibco-Taq polymerase according to the manufacturer's instructions in a Perkin Elmer thermal cycler as follows: 5 min 94 ° C; 33 cycles (1 min 94 ° C, 1 min 61 ° C, 1 min 72 ° C) and 15 min 72 ° C. the specific primers were as follows:
- Northem blot hybridizations were carried out according to standard methods with the 32 P-labeled alternative exon 1 (NET1A) and L32 (Neznanov et al., 1993) probes.
- SEQ ID No. 1 represents the human protein.
- SEQ ID No. 2 represents the mouse protein.
- SEQ ID No. 3 represents the human cDNA.
- SEQ ID No. 4 represents the mouse cDNA.
- Rho GTPases and the actm cytoskeleton Science 279: 509-514.
- Oncogene ectl is related to regulators of small GTP-bmdmg protems. Nature 362: 462-465.
- D4-GDI a Substrate of CPP32, is proteolyzed during ras-mduced apoptosis J. Biol. Chem. 271: 11209-11213
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Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU37039/99A AU3703999A (en) | 1998-04-02 | 1999-03-31 | Protein variant of the net1 locus |
| EP99919171A EP1066379A1 (de) | 1998-04-02 | 1999-03-31 | Proteinvariante des net1-locus |
| CA002324656A CA2324656A1 (en) | 1998-04-02 | 1999-03-31 | Protein variant of the net1 locus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19814861.5 | 1998-04-02 | ||
| DE1998114861 DE19814861A1 (de) | 1998-04-02 | 1998-04-02 | Neue Proteinvariante des NET1-Locus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999051739A1 true WO1999051739A1 (de) | 1999-10-14 |
Family
ID=7863414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1999/002224 Ceased WO1999051739A1 (de) | 1998-04-02 | 1999-03-31 | Proteinvariante des net1-locus |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1066379A1 (de) |
| AU (1) | AU3703999A (de) |
| CA (1) | CA2324656A1 (de) |
| DE (1) | DE19814861A1 (de) |
| WO (1) | WO1999051739A1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997035979A1 (en) * | 1996-03-27 | 1997-10-02 | Dana-Farber Cancer Institute | Novel trio molecules and uses related thereto |
| EP0881291A2 (de) * | 1997-05-27 | 1998-12-02 | Smithkline Beecham Laboratoires Pharmaceutiques | CBS2 Polypeptide, Gliede von der guaninaustauschfaktor Familie |
-
1998
- 1998-04-02 DE DE1998114861 patent/DE19814861A1/de not_active Withdrawn
-
1999
- 1999-03-31 EP EP99919171A patent/EP1066379A1/de not_active Withdrawn
- 1999-03-31 CA CA002324656A patent/CA2324656A1/en not_active Abandoned
- 1999-03-31 AU AU37039/99A patent/AU3703999A/en not_active Abandoned
- 1999-03-31 WO PCT/EP1999/002224 patent/WO1999051739A1/de not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997035979A1 (en) * | 1996-03-27 | 1997-10-02 | Dana-Farber Cancer Institute | Novel trio molecules and uses related thereto |
| EP0881291A2 (de) * | 1997-05-27 | 1998-12-02 | Smithkline Beecham Laboratoires Pharmaceutiques | CBS2 Polypeptide, Gliede von der guaninaustauschfaktor Familie |
Non-Patent Citations (1)
| Title |
|---|
| CHAN A.M.L. ET AL.: "Isolation of a novel oncogene, NET1, from neuroepitheliuma cells by expression cDNA cloning", ONCOGENE, vol. 12, no. 6, 1996, pages 1259 - 1266 1266, XP002098930, ISSN: 0950-9232 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1066379A1 (de) | 2001-01-10 |
| AU3703999A (en) | 1999-10-25 |
| DE19814861A1 (de) | 1999-10-07 |
| CA2324656A1 (en) | 1999-10-14 |
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