WO2002018608A2 - Methods for enhancing the efficacy of cancer therapy - Google Patents
Methods for enhancing the efficacy of cancer therapy Download PDFInfo
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- WO2002018608A2 WO2002018608A2 PCT/US2001/021635 US0121635W WO0218608A2 WO 2002018608 A2 WO2002018608 A2 WO 2002018608A2 US 0121635 W US0121635 W US 0121635W WO 0218608 A2 WO0218608 A2 WO 0218608A2
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- tumor
- antibody
- cancer
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- cells
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- C12Q1/6883—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for diseases caused by alterations of genetic material
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- G01N33/502—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 non-proliferative effects
- G01N33/5023—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 non-proliferative effects on expression patterns
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- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
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Definitions
- the present invention concerns the identification of drug targets for cancer therapy.
- the invention concerns the identification of tumor antigens the expression of which is selectively enhanced by retinoid treatment, and treatment methods targeting such antigens.
- Wnt signaling represents a mechanism that contributes to the progression in a high percentage of human cancers for which appropriate animal and cell culture models are available.
- ⁇ -catenin a key component of the Wnt signaling pathway, interacts with the TCF/LEF family of transcription factors and activates transcription of Wnt target genes.
- TCF/LEF adenomatous polyposis
- inactivation of the APC tumor suppressor occurs early in tumor progression and provides a growth advantage resulting from the inappropriate activation of genes such as cyclin D and c-myc (He et al., Science 281 :1509-1512 (1998)); Tetsu and McCormick, Nature 38:422-426 (1999)).
- genes such as cyclin D and c-myc (He et al., Science 281 :1509-1512 (1998)); Tetsu and McCormick, Nature 38:422-426 (1999)).
- These genes are targets of LEF/TCF transcription factors that are activated by their interaction with ⁇ -catenin, a protein that is normally down-regulated by APC (Barker et al., Adv Cancer Res 77:1-24 (2000); Polakis, Genes Dev 14:1837-1851 (2000)).
- the upregulation of this signaling pathway in cancer can also result from missense mutations in the ⁇ -catenin gene (Rubinfeld et al., Science 275:1790-1792 (1997)); Korinek et al., Science 275:1784-1787 (1997)). These mutations render the ⁇ -cateni ⁇ protein refractory to down-regulation by APC. Mutations in ⁇ -catenin have recently been identified in a wide variety of human tumors and are particularly prevalent in human hepatocellular cancers (Polakis, 2000, supra).
- Activation of a ⁇ -catenin signaling also occurs when the cell surface frizzled receptors are stimulated by the secreted Wnt ligands (Wodarz and Nusse, Annu Rev Cell Dev Biol 14:59-88 (1998)). Although it is not known whether Wnt ligands per se contribute to human cancers, early experiments demonstrated that their over- expression in murine mammary tissue was tumorigenic (Nusse and Varmus, Cell 31 :99- 109 (1982)). The Wnt signaling pathway has been implicated in the pathogenesis of a variety of cancers, including colon cancer, breast cancer, gastric cancer, lung cancer, and melanoma.
- GSK3b glycogen synthase kinase 3b
- This kinase normally phosphorylates the regulatory sequence of ⁇ -catenin that targets the protein for ubiquitin- dependent degradation (Miller and Moon, Genes & Dev. 10:2527-2539 (1996)).
- Negative regulation of GSK3b thus increases the stability of ⁇ -catenin and prolongs its activation of the TCF/LEF transcription factors (Molenaar, et a/..
- mAbs monoclonal antibodies
- FDA US Food and Drug Administration
- ReoPro ® for the management of complications of coronary angioplasty in 1994
- Zenapax ® anti-CD25
- Rituxan ® anti- CD20
- Infliximab anti-TNF-
- Simulec anti-CD25
- Synagis 3 (anti-F protein of respiratory syncitial virus) for the treatment of respiratory infections in 1998
- Herceptin ® anti-HER2/neu
- Novel drug targets can be identified by differential analysis of RNA transcripts isolated from cancer cell lines and tissues.
- this approach has been extended by analyzing differences in gene expression resulting from the drug treatment of transformed and non-transformed cancer cells.
- a breast epithelial cell line which conditionally expresses the Wnt-1 proto-oncogen, was left untreated or treated with 9-cis retinoic acid in the presence of absence of Wnt-1 expression.
- a number of genes, including several cell surface antigens were selectively up-regulated by the combination of Wnt-1 and retinoic acid.
- the invention concerns a method for the selective enhancement of the expression of a protein in a tumor cell characterized by aberrant Wnt signaling comprising treating the tumor cell with an effective amount of a retinoid.
- the protein is characterized by synergistic enhancement of its expression by a combination of Wnt-1 and retinoid treatment.
- the protein is a cell surface protein, which is over-expressed in tumor relative to corresponding normal cells.
- Exemplary proteins include, for example, protein 4-1 BB ligand, ephrin bl, ISLR, autotaxin, and Stra ⁇ .
- the treatment can be performed by any retinoid, including retinoic acid.
- the tumor is a human cancer, such as, for example, ovarian cancer, endometrial cancer, Wilm's kidney tumor, colon cancer, breast cancer, prostate cancer, gastric cancer, lung cancer, hepatocellular cancer, or melanoma.
- the invention concerns a method for the treatment of a tumor characterized by aberrant Wnt signaling comprising treating the tumor with an effective amount of a combination of a retinoid and an anti-tumor agent, wherein the anti-tumor agent targets a protein in the tumor the expression of which is synergistically enhanced by a combination of Wnt-1 and retinoid treatment.
- the targeted protein preferably is a cell surface protein, such as, for example, 4-1 BB ligand, ephrin bl, ISLR, autotaxin, or Stra6.
- the retinoid may be administered prior to, concurrently with, or following the administration of the anti-tumor agent.
- the anti-tumor agent is an antibody.
- antibody is used in the broadest sense, and includes antibody fragments, such as Fab, Fab', F(ab') 2 , and Fv fragments, diabodies, single-chain antibody molecules, and multispecific antibodies formed from antibody fragments.
- the antibody may be a chimeric, humanized, or human antibody, including antibody fragments.
- the treatment may optionally include additional treatment, for example with a chemotherapeutic agent and/or radiation treatment.
- the tumor preferably is a human cancer, such as, for example ovarian cancer, endometrial cancer, Wilm's kidney tumor, colon cancer, breast cancer, prostate cancer, gastric cancer, lung cancer, hepatocellular cancer, and melanoma.
- the invention concerns a method for identifying a target gene for tumor treatment comprising contacting a tumor cell with a retinoid and identifying a gene which is selectively upregulated by the retinoid.
- the target gene is identified by
- the tumor cell is additionally contacted with Wnt-1, and a protein the expression of which is synergistically enhanced by the retinoid and Wnt-1 is identified.
- the invention concerns a method for the treatment of a tumor in a mammalian subject comprising the steps of:
- the sample is additionally incubated with Wnt-1, and a gene is identified the expression of which is synergistically enhanced by a combination of the retinoid and Wnt-1.
- the anti-tumor agent may be an antibody, including antibody fragments, such as Fab, Fab", F(ab') 2 , and Fv fragments, diabodies, single-chain antibody molecules, and multispecific antibodies formed from antibody fragments.
- the antibodies or antibody fragments may be chimeric, humanized, or human.
- the treatment may further comprise the administration of a chemotherapeutic agent, which may, for example, be a cytotoxic molecule, optionally fused to an antibody specifically binding the protein identified and/or radiation treatment.
- a chemotherapeutic agent which may, for example, be a cytotoxic molecule, optionally fused to an antibody specifically binding the protein identified and/or radiation treatment.
- the invention concerns method for the diagnosis of cancer associated with aberrant Wnt signaling in a mammalian patient based on the detection of a tumor antigen upregulated by retinoid treatment.
- the biological sample may, for example, be a tumor cell or tissue.
- the invention concerns articles of manufacture comprising an anti-tumor agent and instructions to administer such anti-tumor agent in combination with a retinoid, such as retinoic acid.
- a retinoid such as retinoic acid.
- the article of manufacture may additionally comprise a retinoid.
- Figure 1 shows the nucleotide sequence (SEQ ID N0:1) of a cDNA containing a nucleotide sequence (nucleotides 1-2732) encoding native sequence PR010282 (stra ⁇ ), wherein the nucleotide sequence (SEQ ID N0:1) is a clone designated herein as "DNA148380-2827.” Also presented in bold font and underlined are the positions of the respective start and stop codons.
- Figure 2 shows the amino acid sequence (SEQ ID N0:2) of a native sequence PR010282 (stra6) polypeptide as derived from the coding sequence of SEQ ID I ⁇ I0:1. Also shown are the approximate locations of various other important polypeptide domains.
- Figures 3A-D show hypothetical exemplifications for using the below described method to determine % amino acid sequence identity ( Figures 3A-B) and % nucleic acid sequence identity ( Figures 3C-D) using the ALIGN-2 sequence comparison computer program, wherein "PRO” represents the amino acid sequence of a hypothetical PR010282 polypeptide of interest, “Comparison Protein” represents the amino acid sequence of a polypeptide against which the "PRO” polypeptide of interest is being compared, “PRO-DNA” represents a hypothetical PR010282-encoding nucleic acid sequence of interest, “Comparison DNA” represents the nucleotide sequence of a nucleic acid molecule against which the "PRO-DNA” nucleic acid molecule of interest is being compared, “X, "Y” and “Z” each represent different hypothetical amino acid residues and "N", “L” and “V” each represent different hypothetical nucleotides.
- Figures 4A-Q provide the complete source code for the ALIGN-2 sequence comparison computer program.
- This source code may be routinely compiled for use on a UNIX operating system to provide the ALIGN-2 sequence comparison computer program.
- Figure 5 shows a nucleotide sequence designated herein as DNA100038 (SEQ ID N0:3).
- Figure 6 shows the nucleotide sequence (SEQ ID NO: 4) of a cDNA containing a nucleotide sequence (nucleotides 1-2778) encoding a native sequence human Stra6 polypeptide variant, wherein the nucleotide sequence (SEQ ID N0:4) is a clone designated herein as "DNA148389-2827-1.” Also presented in bold font and underlined are the positions of the respective start and stop codons.
- Figure 7 shows the amino acid sequence (SEQ ID l ⁇ 10:5) of a native sequence human Stra ⁇ polypeptide variant as derived from the coding sequence of SEQ ID N0:4. Also shown are the approximate locations of various other important polypeptide domains.
- Figure 8 is a schematic representation of mouse Stra6, and the human Stra ⁇ protein encoded by DNA148380-2827 (native human PR010282).
- Figure 9 shows the hydrophobicity plot of the native sequence human Stra6 protein encoded by DNA 148380-2827 (native human PR010282).
- Figure 10 shows the relative RNA expression profile for the native sequence human Stra ⁇ protein encoded by
- Figure 1 1 shows the RNA fold expression for the native sequence human Stra ⁇ protein encoded by DNA 148380-2827 in human colon tumor tissue relative to RNA expression in normal mucose from the same patient assayed by quantitative PCR.
- the data are from one experiment done in triplicate. The experiment was repeated at least twice with a different set of PCR primers.
- Figure 12A shows the RNA expression for the native sequence human Stra ⁇ protein encoded by DNA148380-2827 in human colon tissue relative to RNA expression in normal mucose from the same patient, using the housekeeping gene, GAPDH as a control.
- Figure 12B shows the localization of Stra6 to the epithelial tumor cells in a colon adenocarcinoma by in situ hybridization.
- Figure 13 shows the RNA expression for the native human Stra ⁇ protein encoded by DNA148380-2827 in human breast, kidney, colon and lung tumor cell lines, relative to corresponding normal cell lines.
- Figure 14 illustrates the expression of peptide fragments derived from the native sequence human Stra ⁇ protein encoded by DNA148380-2827 m Eco/i.
- Figure 15 illustrates Stra ⁇ RNA expression in human colon carcinoma cells in the presence and absence of all-trans-retinoic acid (ATRA) and 9-cis-retinoic acid (9cRA), respectively.
- ATRA all-trans-retinoic acid
- 9cRA 9-cis-retinoic acid
- Figure 16 In situ hybridization for Stra ⁇ in tumor sections. Darkfield images demonstrating silver grains (A, C, E, G) are shown with corresponding hematoxylin/eosin-stained brightfield images (B, D, F, H). Moderate densities of silver grains overlie tumor cells but not a blood vessel in a malignant melanoma (A, B). Neoplastic epithelium in an endometrial adenocarcinoma is moderately labeled whereas tumor stroma is negative (C, D). Blastemal regions in a
- Figure 17 (A) Induction of Stra6 mRNA expression in response to 9-c y-RA or all-tra/w-RA in C57MG/Parent and C57MG/Wnt-1 cells. (B) Induction of Stra ⁇ mRNA expression in C57MG/Parent cells in response to Wnt-3A conditioned media and 9- ⁇ s-RA. (C) Induction of Stra ⁇ mRNA expression after retinoic acid treatment in HCT116 and
- WiDr cells before (-RA) and after (+RA) treatment with retinoic acid as visualized by Western blot with a monoclonal antibody directed against human Stra ⁇ peptide B.
- F Stra ⁇ membrane localization in WiDr cells untreated (left panel) or treated (right panel) with retinoic acid. Immunohistochemistry was performed with an anti-human Stra6 peptide B monoclonal hybridoma culture supernatant (clone 12F4.2H9.1 D5). For the experiments shown in A-F, cells were treated with retinoic acid for 48 hours. Stra ⁇ products obtained after completion of the quantitative PCR reactions (40 cycles each) are shown below each graph A-C.
- FIG. 18 Wnt-1 induces RAR ⁇ -1 expression. Protein-equivalent amounts of whole cell lysate from tetracycline repressible C57MG/Wnt-1 cells in the absence of tetracycline for 0, 24, 48, or 72 hours, were subjected to SDS-PAGE and immunoblotted for RAR ⁇ -1 and ERK2.
- B RAR ⁇ -1 mRNA expression in hyperplastic mammary glands and mammary gland tumors from Wnt-1 transgenic mice. mRNA expression was determined by quantitative RT-PCR and the data are expressed as fold expression relative to mRNA expression in wild-type mammary glands.
- Figure 19 illustrates the synergistic induction of stra ⁇ by retinoic acid (RA) and Wnt-1 (Wnt) treatment.
- Figure 20 illustrates the synergistic induction of autotaxin by retinoic acid (RA and Wnt-1 (Wnt).
- Figure 21 illustrates the synergistic induction of the 41 BB ligand (41bb) by retinoic acid (RA) and Wnt-1 (Wnt).
- RA retinoic acid
- Wnt Wnt-1
- Figure 22 illustrates the synergistic induction of ephrinbl by retinoic aid (RA) and Wnt-1 (Wnt).
- Figure 23 shows that the ISRL gene is responsive to retinoic acid (RA), but not to Wnt-1 (Wnt), while the combination of both agents results in activation that exceeds that of retinoic acid alone.
- Figure 24 shows that the tight junction protein ZO-1 and the M-ras gene do not respond significantly either to retinoic acid (RA) or Wnt-1 (Wnt) alone, but are activated by combined treatment.
- RA retinoic acid
- Wnt Wnt-1
- FIG 25A illustrates the activation of an RAR response element (RARE) by ⁇ -catenin, as determined by the increased production of luciferase.
- Figure 25B shows that the LEF responsive element TopFlash is activated not only by ⁇ -catenin, was further activated by coexpression of LEF with ⁇ -catenin.
- RARE RAR response element
- Figure 26 shows the upregulation of Stra ⁇ mRNA in tumors and normal mammary gland by various doses of all-tra 75-retinoic acid (ATRA).
- ATRA all-tra 75-retinoic acid
- Figure 27 shows the upregulation of Stra ⁇ mRNA in WiDr xenografts from mice orally dosed with 400 mg/kg of ATRA.
- PR010282 polypeptide As used interchangeably, and encompass native sequence PR010282 (Stra ⁇ ) and PR010282 02/18608
- the PR010282 (Stra ⁇ ) polypeptide may be isolated from a variety of sources, such as from human tissue types or from another source, or prepared by recombinant and/or synthetic methods.
- a “native sequence PR010282” or “native sequence Stra ⁇ ” comprises a polypeptide having the same amino acid sequence as a PR010282 derived from nature. Such native sequence PR010282 (Stra ⁇ ) can be isolated from nature or can be produced by recombinant and/or synthetic means.
- the term "native sequence PR010282” or “native sequence Stra ⁇ ” specifically encompasses naturally-occurring truncated or secreted forms [e.g., an extracellular domain sequence), naturally-occurring variant forms (e.g., alternatively spliced forms) and naturally-occurring allelic variants of the PR010282.
- the native sequence PR010282 is a mature or full- length native sequence PRO 10282 comprising amino acids 1 to 667 of Figure 2 (SEQ ID N0:2).
- the native sequence PR010282 polypeptide is a mature or full-length PR019578 polypeptide comprising amino acids 1 to 658 of SEQ ID NO: 5, which is believed to be an alternatively spliced form of the native sequence PR010282 polypeptide of SEQ ID NO: 2.
- PR010282 polypeptides disclosed in Figure 2 (SEQ ID I ⁇ I0:2) and in Figure 7, SEQ ID NO: 5 are shown to begin with the methionine residue designated herein as amino acid position 1, it is conceivable and possible that another methionine residue located either upstream or downstream from amino acid position 1 in Figure 2 (SEQ ID N0:2) or in Figure 7 (SEQ ID NO: 5) may be employed as the starting amino acid residue for the PR010282 polypeptide. All Stra ⁇ molecules which might be alternatively spliced at their 5' end are specifically inlcuded within the definition herein.
- the PR010282 (Stra ⁇ ) polypeptide "extracellular domain” or “ECD” refers to a form of the PR010282 (Stra ⁇ ) polypeptide which is essentially free of the transmembrane and cytoplasmic domains.
- ECD extracellular domain
- a PR010282 polypeptide ECD will have less than about 1 % of such transmembrane and/or cytoplasmic domains and preferably, will have less than about 0.5% of such domains. It will be understood that any transmembrane domain(s) identified for the PR010282 polypeptides of the present invention are identified pursuant to criteria routinely employed in the art for identifying that type of hydrophobic domain.
- the extracellular domain of a PR010282 polypeptide comprises amino acids 1 to X, wherein X is any amino acid from amino acid 49 to 59 of Figure 2 (SEQ ID N0:2) or of Figure 7 (SEQ ID NO: 5).
- PR010282 (Stra6) variant polypeptides include, for instance, PR010282 (Stra ⁇ ) polypeptides wherein one or more amino acid residues are added, or deleted, at the N- and/or C-terminus, as well as within one or more internal domains, of the sequence of Figure 2 (SEQ ID N0:2) or Figure 7 (SEQ ID NO: 5).
- a PR010282 variant polypeptide will have at least about 80% amino acid sequence identity, more preferably at least about 81 % amino acid sequence identity, more preferably at least about 82% amino acid sequence identity, more preferably at least about 83% amino acid sequence identity, more preferably at least about 84% amino acid sequence identity, more preferably at least about 85% amino acid sequence identity, more preferably at least about 86% amino acid sequence identity, more preferably at least about 87% amino acid sequence identity, more preferably at least about 88% amino acid sequence identity, more preferably at least about 89% amino acid sequence identity, more preferably at least about 90% amino acid sequence identity, more preferably at least about 91 % amino acid sequence identity, more preferably at least about 92% amino acid sequence identity, more preferably at least about 93% amino acid sequence identity, more preferably at least about 94% amino acid sequence identity, more preferably at least about 95% amino acid sequence identity, more preferably at least about 96% amino acid sequence identity, more preferably at least about 97% amino acid sequence identity, more preferably at least
- PR010282 variant polypeptides do not encompass the native PR010282 polypeptide sequence.
- PR010282 variant polypeptides are at least about 10 amino acids in length, often at least about 20 amino acids in length, more often at least about 30 amino acids in length, more often at least about 40 amino acids in length, more often at least about 50 amino acids in length, more often at least about 60 amino acids in length, more often at least about 70 amino acids in length, more often at least about 80 amino acids in length, more often at least about 90 amino acids in length, more often at least about 100 amino acids in length, more often at least about 150 amino acids in length, more often at least about 200 amino acids in length, more often at least about 250 amino acids in length, more often at least about 300 amino acids in length, or more, and are different from fragments of the murine Stra6 sequence, as disclosed in
- Percent (%) amino acid sequence identity is defined as the percentage of amino acid residues in a candidate sequence that are identical with the amino acid residues in a reference (e.g. native polypeptide) sequence, after aligning the sequences and introducing gaps, if necessary, to achieve the maximum percent sequence identity, and not considering any conservative substitutions as part of the sequence identity. Alignment for purposes of determining percent amino acid sequence identity can be achieved in various ways that are within the skill in the art, for instance, using publicly available computer software such as BLAST, BLAST-2, ALIGN, ALIGN-2 or Megalign (DNASTAR) software. Those skilled in the art can determine appropriate parameters for measuring alignment, including any algorithms needed to achieve maximal alignment over the full-length of the sequences being compared.
- % amino acid sequence identity values are obtained as described below by using the sequence comparison computer program ALIGN-2, wherein the complete source code for the ALIGN-2 program is provided in Figures 4A-Q.
- the ALIGN-2 sequence comparison computer program was authored by Genentech, Inc. and the source code shown in Figures 4A-Q has been filed with user documentation in the U.S. Copyright Office, Washington D.C., 20559, where it is registered under U.S. Copyright Registration No. TXU510087.
- the ALIGN-2 program is publicly available through Genentech, Inc., South San Francisco, California or may be compiled from the source code provided in Figures 4A-Q.
- the ALIGN-2 program should be compiled for use on a UNIX operating system, preferably digital UNIX V4.0D. All sequence comparison parameters are set by the ALIGN-2 program and do not vary.
- % amino acid sequence identity of a given amino acid sequence A to, with, or against a given amino acid sequence B is calculated as follows:
- % amino acid sequence identity values used herein are obtained as described above using the ALIGN-2 sequence comparison computer program. However, % amino acid sequence identity may also be determined using the sequence comparison program NCBI-BLAST2 (Altschul et al., Nucleic Acids Res. 25:3389-3402 (1997)). The NCBI-BLAST2 sequence comparison program may be downloaded from http://www.ncbi.nlm.nih.gov.
- the % amino acid sequence identity of a given amino acid sequence A to, with, or against a given amino acid sequence B (which can alternatively be phrased as a given amino acid sequence A that has or comprises a certain % amino acid sequence identity to, with, or against a given amino acid sequence B) is calculated as follows:
- 4-1 BB ligand and "4-1 BBL” are used interchangeably and refer to a native sequence membrane protein belonging to the tumor necrosis factor superfamily, typically expressed on antigen presenting cells, and its variants.
- the nucleic acid and deduced amino acid sequences of a native human 4-1 BB ligand are disclosed in Zhou et al., Immunol Lett 45:67-73 (1995).
- the amino acid sequence variants of native sequence 4-1BB ligands are defined on the analogy of the Stra ⁇ protein discussed above, using the same algorithm to determine sequence identity. It has been shown that antibodies to the receptor of 4-1 BBL (4-1 BB) can eradicate established tumors in mice, and the 4- 1 BB T cell stimulation pathway has been implicated in the amplification of an antitumor immune response.
- ephrin b1 is used herein to describe native sequence ephrin b1 molecules (also known as “lerl ⁇ 2") and their variants, which are defined as described above for Stra ⁇ .
- Human ephrin b1 is a 45 kDa, 346 amino acid gly cosy lated polypeptide that contains a 24 amino acid signal sequence, a 211 amino acid extracellular region, a 26 amino acid transmembrane (TM) region, and an 83 amino acid cytoplasmic segment (Davis, et al., Science 266:816 (1994); Beckmann, etal., EMBOJ 13:3657 (1994)).
- ISLR immunoglobulin superfamily containing leucine rich repeat
- LRR immunoglobulin superfamily containing LRR
- autotaxin and "ATX” are used interchangeably, and refer to native sequence autotaxin molecules of any animal species, and autotaxin variants, as hereinabove defined.
- Autotaxin is a cancer-related autocrine motility factor, which shows signifiant homology to the plasma cell membrane differentiation antigen PC-1.
- Human autotaxin is a 125-kDa, 915 aa glycoprotein originally isolated from a human melanoma cell line (Murata et al., J Biol Chem 269:30479-84 (1994)). The cloning of autotaxin from human teratoarcinoma cells has been reported by
- Autotoxin has been described to catalyze the hydrolysis of the phosphodiester bond on either side of the beta-phosphate of ATP, and also to catalyze the hydrolysis of GTP to GDP and GMP, of either AMP or PPi to Pi, and the hydrolysis of NAD to AMP.
- Each of these substrates can serve as a phosphate donor in the phosphorylation of autotoxin.
- Autotoxin is believed to be a potent tumor motogen, which augments invasive and metastatic potential of ras-transfor ed cells (Nam etal., Oncogene 19:241-247 (2000)).
- retinoid is used in the broadest sense and specifically includes, without limitation, retinoic acid (also known as tretinoin, vitamin A acid or vitamin A,), and retinoic acid derivatives consisting of four isoprenoid units joined in a head-to-tail manner, such as retinol, retinal, substituted retinoids, seco-, nor-, and retro-retinoids. All retinoids may be formally derived from a onocyclic parent compound containing five carbon-carbon double bonds and a functional group at the terminus of the acyclic portion. For the nomenclature of retinoids see Moss, G.P., Arch.
- retinoid specifically includes molecules occurring in nature and their derivatives, as long as they retain retinoid biological activity.
- retinoid biological activity refers to involvement in embryogenesis, (epithelial) cell proliferation, cell differentiation and/or carcinogenesis, especially oncogenic effect associated with cancers characterized by aberrant Wnt signaling.
- Wnt refers to a family of highly conserved, cysteine-rich, secreted glycoproteins that are involved in critical aspects of early embryonic development. Wnt genes are also implicated in cancer. "Wnt” as used herein specifically includes Wnt genes of all human and non-human animal species, including, but not limited to, mammals, such as human, mouse, rat and other rodents, etc.
- Wnt specifically includes native human Wnt genes and encoded polypeptides, including human Wnt-1 (previously called int-1) (van Ooyen et al., EMBO J 4:2905-9 (1985)); Wnt-2 (previously called Dint-1) (Wainwright et al., EMBO J 7:1743-1748 (1988)); Wnt-13 (Katoh et al., Oncogene 13:873-876 (1996)); Wnt-3 (Roelink et al., Genomics 17:790-792 (1993)); Huguet et al., Cancer Res 54:2615-2521 (1994)); Wnt-4 (Huguet et al., 1994, supra); Wnt-5A (Clark et al., Genomics 18:249-260 (1993)); Wnt-6 (Rankin et al.,
- a cancer is "characterized by aberrant Wnt signaling” if it harbors genetic defects and/or shows altered expression patterns (including mutations, amplification, over-expression and/or suppression) of any member of a Wnt signaling pathway.
- Wnts exert their effects through interaction with cell surface receptors, named "Frizzled.” Structurally, the Frizzled receptors have an extracellular Wnt-binding domain, seven transmembrane-spanning regions, and an intracellular C-terminal tail. Additional components of the Frizzled receptor-Wnt interaction pathway are the soluble Wnt inhibitors which consist of secreted proteins containing a cysteine-rich domain (CRD) similar to that in the ligand binding domain of the Frizzled receptors.
- CCD cysteine-rich domain
- Frizzled Receptor-like Proteins are collectively referred to as Frizzled Receptor-like Proteins (FRPs). Since the Frizzled receptors have no enzymatic motifs on their intracellular domains, the Wnt signals are believed to be transmitted through receptor coupling to Dishevelled (dsh) proteins. The next step in the Wnt signaling cascade is the inhibition of the serine/threonine kinase, glycogen synthetase kinase-3b (GSK-3b) by FRPs.
- GSK-3b glycogen synthetase kinase-3b
- the consequence of the Wnt-induced inhibition of GSK-3b activity is that the next protein in the cascade, ⁇ -catenin, is stabilized.
- the central region of the ⁇ -catenin protein contains a positively charged groove which is believed to interact with acidic regions in the adenometous polyposis coli (APC) locus encoded protein, the transcription factor TCF/LEF1, and the cadherin family of calcium-dependent cell-adhesion molecules.
- APC adenometous polyposis coli
- Mutations in the Wnt-1 gene are also involved in the development of Wilm's tumors, a kidney cancer found in children.
- further members of the Wnt signaling pathway include, without limitation, other members of the Wnt gene family, Frizzled receptors, the cytoplasmic protein Dishevelled (Dsh), glycogen synthase kinase-3 ⁇ (GSK-3 ⁇ ), the transcription factor TCF/LEF 1, and transcriptionally activated downstream components of the pathway, such as the nodal-related 3 gene, Xnr3, the homeobox genes, engrailed, goosecoid, twin (Xtwn), and siamois, c-myc, and the WISP genes, e.g. WISP-1 and WISP-2.
- characterized by aberrant Wnt signaling includes genetic defects and/or altered expression patterns (including mutations, amplification, over-expression and/or suppression) of any of these members of the Wnt signaling pathway, or any other members, known today or hereinafter identified.
- the enhancement of the expression of an antigen in a tumor is "selective," if the enhancement of the expression level of such antigen in tumor cells is significantly higher than in normal cells.
- the enhancement of the expression level of a target antigen e.g. a cell surface antigen
- the enhancement of the expression level of a target antigen in tumor cells results in at least about two-fold, more preferably at least about three-fold, even more preferably at least about five-fold, most preferably at least about ten-fold over-expression in tumor cells or tissues relative to corresponding normal (non- tumorigenic) cells or tissues.
- Tumor refers to all neoplastic cell growth and proliferation, whether malignant or benign, and all pre-cancerous and cancerous cells and tissues.
- cancer and “cancerous” refer to or describe the physiological condition in mammals that is typically characterized by unregulated cell growth.
- cancer include but are not limited to, carcinoma, lymphoma, blasto a, sarcoma, and leukemia. More particular examples of such cancers include breast cancer, prostate cancer, colon cancer, squamous cell cancer, small-cell lung cancer, non-small cell lung cancer, gastrointestinal cancer, pancreatic cancer, glioblastoma, cervical cancer, ovarian cancer, liver cancer, bladder cancer, hepatoma, colorectal cancer, endometrial carcinoma, salivary gland carcinoma, kidney cancer, liver cancer, vulval cancer, thyroid cancer, hepatic carcinoma and various types of head and neck cancer.
- Cancers particularly amenable to treatment in accordance with the present invention include ovarian cancer, endometrial cancer, Wilm's kidney tumor, colon cancer, breast cancer, prostate cancer, gastric cancer, lung cancer, hepatocellular cancer, and melanoma.
- Treatment refers to both therapeutic treatment and prophylactic or preventative measures, wherein the object is to prevent or slow down (lessen) the targeted pathologic condition or disorder.
- Those in need of treatment include those already with the disorder as well as those prone to have the disorder or those in whom the disorder is to be prevented.
- a therapeutic agent may directly decrease the pathology of tumor cells, or render the tumor cells more susceptible to treatment by other therapeutic agents, e.g., radiation and/or chemotherapy.
- the "pathology" of cancer includes all phenomena that compromise the well-being of the patient. This includes, without limitation, abnormal or uncontrollable cell growth, metastasis, interference with the normal functioning of neighboring cells, release of cytokines or other secretory products at abnormal levels, suppression or aggravation of inflammatory or immunological response, etc.
- “Chronic” administration refers to administration of the agent(s) in a continuous mode as opposed to an acute mode, so as to maintain the initial therapeutic effect (activity) for an extended period of time.
- "Intermittent" administration is treatment that is not consecutively done without interruption, but rather is cyclic in nature.
- mammal for purposes of treatment refers to any animal classified as a mammal, including humans and other higher mammals, domestic and farm animals, and zoo, sports, or pet animals, such as dogs, cats, cattle, horses, sheep, pigs, goats, rabbits, etc. Preferably, the mammal is human.
- Administration in combination with one or more further therapeutic agents, or “co-administration,” which terms are used interchangeably, includes simultaneous (concurrent) and consecutive administration in any order.
- Antibodies are glycoproteins having the same structural characteristics. While antibodies exhibit binding specificity to a specific antigen, immunoglobulins include both antibodies and other antibody-like molecules which lack antigen specificity. Polypeptides of the latter kind are, for example, produced at low levels by the lymph system and at increased levels by myelomas.
- “Native antibodies and immunoglobulins” are usually heterotetrameric glycoproteins of about 150,000 daltons, composed of two identical light (L) chains and two identical heavy (H) chains. Each light chain is linked to a heavy chain by one covalent disulfide bond, while the number of disulfide linkages varies between the heavy chains of different immunoglobulin isotypes. Each heavy and light chain also has regularly spaced intrachain disulfide bridges.
- Each heavy chain has at one end a variable domain (VH) followed by a number of constant domains.
- Each light chain has a variable domain at one end (VL) and a constant domain at its other end; the constant domain of the light chain is aligned with the first constant domain of the heavy chain, and the light chain variable domain is aligned with the variable domain of the heavy chain.
- Particular amino acid residues are believed to form an interface between the light- and heavy-chain variable domains (Chothia et al., J. Mol. Biol. 186:651 [1985]; Novotny and Haber, Proc. Natl. Acad. Sci. U.S.A. 82:4592 [1985]; Chothia et al., Nature 342: 877-883 [1989]).
- variable refers to the fact that certain portions of the variable domains differ extensively in sequence among antibodies and are used in the binding and specificity of each particular antibody for its particular antigen. However, the variability is not evenly distributed throughout the variable domains of antibodies. It is concentrated in three segments called complementarity-determining regions (CDRs) or hypervariable regions both in the light-chain and the heavy-chain variable domains. The more highly conserved portions of variable domains are called the framework (FR).
- CDRs complementarity-determining regions
- FR framework
- the variable domains of native heavy and light chains each comprise four FR regions, largely adopting a ⁇ -sheet configuration, connected by three CDRs, which form loops connecting, and in some cases forming part of, the ⁇ -sheet structure.
- the CDRs in each chain are held together in close proximity by the FR regions and, with the CDRs from the other chain, contribute to the formation of the antigen-binding site of antibodies (see Kabat et al. (1991) supra).
- the constant domains are not involved directly in binding an antibody to an antigen, but exhibit various effector functions, such as participation of the antibody in antibody-dependent cellular toxicity.
- the "light chains" of antibodies (immunoglobulins) from any vertebrate species can be assigned to one of two clearly distinct types, called K and ⁇ , based on the amino acid sequences of their constant domains.
- immunoglobulins can be assigned to different classes. There are five major classes of immunoglobulins: IgA, IgD, IgE, IgG, and IgM, and several of these can be further divided into subclasses (isotypes), e.g., IgG*,, lgG 2 , lgG 3 , lgG 4 , IgA,, and lgA 2 .
- the heavy-chain constant domains that correspond to the different classes of immunoglobulins are called ⁇ , ⁇ , ⁇ ⁇ , and ⁇ respectively.
- the subunit structures and three-dimensional configurations of different classes of immunoglobulins are well known.
- antibody includes all classes and subclasses of intact immunoglobulins.
- antibody also covers antibody fragments.
- antibody specifically covers monoclonal antibodies, including antibody fragment clones.
- Antibody fragments comprise a portion of an intact antibody that contains the antigen binding or variable region of the intact antibody.
- antibody fragments include Fab, Fab', F(ab') 2 , and Fv fragments; diabodies; single-chain antibody molecules, including single-chain Fv (scFv) molecules; and multispecific antibodies formed from antibody fragments. being obtained from a substantially homogeneous population of antibodies, and is not to be construed as requiring production of the antibody by any particular method.
- the monoclonal antibodies to be used in accordance with the present invention may be made by the hybridoma method first described by Kohler et al., Nature, 256:495 (1975), or may be made by recombinant DNA methods (see, e.g., U.S. Patent No. 4,816,567).
- the "monoclonal antibodies” also include clones of antigen-recognition and binding-site containing antibody fragments (Fv clones) isolated from phage antibody libraries using the techniques described in Clackson et al., Nature, 352:624-628 (1991) and Marks etal., J. Mol. Biol., 222:581-597 (1991), for example.
- the monoclonal antibodies herein specifically include "chimeric" antibodies (immunoglobulins) in which a portion of the heavy and/or light chain is identical with or homologous to corresponding sequences in antibodies derived from a particular species or belonging to a particular antibody class or subclass, while the remainder of the chain(s) is identical with or homologous to corresponding sequences in antibodies derived from another species or belonging to another antibody class or subclass, as well as fragments of such antibodies, so long as they exhibit the desired biological activity (U.S. Patent No. 4,816,567 to Cabilly et al.; Morrison et al., Proc. Natl. Acad. Sci. USA, 81 :6851- 6855 [1984]).
- chimeric antibodies immunoglobulins in which a portion of the heavy and/or light chain is identical with or homologous to corresponding sequences in antibodies derived from a particular species or belonging to a particular antibody class or subclass, while the remainder of the chain(s) is
- Humanized forms of non-human (e.g., murine) antibodies are chimeric immunoglobulins, immunoglobulin chains or fragments thereof (such as Fv, Fab, Fab', F(ab') 2 or other antigen-binding subsequences of antibodies) which contain minimal sequence derived from non-human immunoglobulin.
- humanized antibodies are human immunoglobulins (recipient antibody) in which residues from part or all of a complementarity-determining region (CDR) of the recipient are replaced by residues from a CDR of a non-human species (donor antibody) such as mouse, rat or rabbit having the desired specificity, affinity, and capacity.
- CDR complementarity-determining region
- humanized antibodies may comprise residues which are found neither in the recipient antibody nor in the imported CDR or framework sequences. These modifications are made to further refine and optimize antibody performance.
- the humanized antibody will comprise substantially all of at least one, and typically two, variable domains, in which all or substantially all of the CDR regions correspond to those of a non-human immunoglobulin and all or substantially all of the FR regions are those of a human immunoglobulin sequence.
- the humanized antibody optimally also will comprise at least a portion of an immunoglobulin constant region (Fc), typically that of a human immunoglobulin.
- Fc immunoglobulin constant region
- the humanized antibody includes a PrimatizedTM antibody wherein the antigen-binding region of the antibody is derived from an antibody produced by immunizing macaque monkeys with the antigen of interest.
- Single-chain Fv or “scFv” antibody fragments comprise the VH and VL domains of antibody, wherein these domains are present in a single polypeptide chain.
- the scFv polypeptide further comprises a polypeptide linker between the VH and VL domains, which enables the scFv to form the desired structure for antigen binding.
- diabodies refers to small antibody fragments with two antigen-binding sites, which fragments comprise a heavy-chain variable domain (VH) connected to a light-chain variable domain (VL) in the same polypeptide chain (VH - VL).
- VH heavy-chain variable domain
- VL light-chain variable domain
- an “isolated” antibody is one which has been identified and separated and/or recovered from a component of its natural environment. Contaminant components of its natural environment are materials which would interfere with diagnostic or therapeutic uses for the antibody, and may include enzymes, hormones, and other proteinaceous or nonproteinaceous solutes.
- the antibody will be purified (1) to greater than 95% by weight of antibody as determined by the Lowry method, and most preferably more than 99% by weight, (2) to a degree sufficient to obtain at least 15 residues of N-terminal or internal amino acid sequence by use of a spinning cup sequenator, or (3) to homogeneity by SDS-PAGE under reducing or nonreducing conditions using Coomassie blue or, preferably, silver stain.
- Isolated antibody includes the antibody in situ within recombinant cells since at least one component of the antibody's natural environment will not be present. Ordinarily, however, isolated antibody will be prepared by at least one purification step.
- neutralizing antibody an antibody molecule which is able to eliminate or significantly reduce an effector function of a target antigen to which it binds.
- Carriers as used herein include pharmaceutically acceptable carriers, excipients, or stabilizers which are nontoxic to the cell or mammal being exposed thereto at the dosages and concentrations employed. Often the physiologically acceptable carrier is an aqueous pH buffered solution.
- physiologically acceptable carriers include buffers such as phosphate, citrate, and other organic acids; antioxidants including ascorbic acid; low molecular weight (less than about 10 residues) polypeptide; proteins, such as serum albumin, gelatin, or immunoglobulins; hydrophilic polymers such as polyvinylpyrrolidone; amino acids such as glycine, glutamine, asparagine, arginine or lysine; onosaccharides, disaccharides, and other carbohydrates including glucose, mannose, or dextrins; chelating agents such as EDTA; sugar alcohols such as mannitol or sorbitol; salt-forming counterions such as sodium; and/or nonionic surfactants such as TWEENTM, polyethylene glycol (PEG), and PLURONICSTM.
- buffers such as phosphate, citrate, and other organic acids
- antioxidants including ascorbic acid
- proteins such as serum albumin
- label when used herein refers to a detectable compound or composition which is conjugated directly or indirectly to the antibody so as to generate a "labeled" antibody.
- the label may be detectable by itself (e.g. radioisotope labels or fluorescent labels) or, in the case of an enzymatic label, may catalyze chemical alteration of a substrate compound or composition which is detectable.
- solid phase is meant a non-aqueous matrix to which the antibody of the present invention can adhere.
- solid phases encompassed herein include those formed partially or entirely of glass (e.g., controlled pore glass), polysaccharides (e.g., agarose), polyacrylamides, polystyrene, polyvinyl alcohol and silicones.
- the solid phase can comprise the well of an assay plate; in others it is a purification column (e.g., an affinity chromatography column). This term also includes a discontinuous solid phase of discrete particles, such as those described in U.S. Patent No. 4,275,149.
- a “liposome” is a small vesicle composed of various types of lipids, phospholipids and/or surfactant which is useful for delivery of a drug (such as a PR010282 polypeptide or antibody thereto) to a mammal.
- the components of the liposome are commonly arranged in a bilayer formation, similar to the lipid arrangement of biological membranes.
- a “small molecule” is defined herein to have a molecular weight below about 500 Daltons.
- upregulation is used in the broadest sense and refers to the induction and/or enhancement of gene expression as measured, for example, by quantification of mRNA levels.
- gene amplification and “gene duplication” are used interchangeably and refer to a process by which multiple copies of a gene or gene fragment are formed in a particular cell or cell line.
- the duplicated region (a stretch of amplified DNA) is often referred to as "amplicon.”
- amplicon a stretch of amplified DNA
- the amount of the messenger RNA (mRNA) produced i.e., the level of gene expression, also increases in the proportion of the number of copies made of the particular gene expressed.
- anti-tumor agent or “anti-cancer agent” is used in the broadest sense and including any molecule useful in the treatment of cancer.
- molecules include, without limitation, polypeptides (including proteins), such as antibodies, peptides, organic and inorganic small molecules, DNA and RNA molecules, etc.
- cytotoxic agent refers to a substance that inhibits or prevents the function of cells and/or causes destruction of cells. Without limitation, the term is intended to include radioactive isotopes (e.g., I 131 ,
- chemotherapeutic agents such as enzymatically active toxins of bacterial, fungal, plant or animal origin, or fragments thereof.
- the term specifically includes maytansines and maytansinoids, BCNU, streptozoicin, vincristine, and the family of agents described in U.S. patent Nos. 5,053,395 and 5,770,710, as well as esperamicins (U.S. patent No. 5,877,296).
- a "chemotherapeutic agent” is a chemical compound useful in the treatment of cancer.
- chemotherapeutic agents include adriamycin, doxorubicin, epirubicin, 5-fluorouracil, cytosine arabinoside ("Ara-C"), cyclophosphamide, thiotepa, busulfan, cytoxin, taxoids, e.g., paclitaxel (Taxol, Bristol-Myers Squibb Oncology,
- doxetaxel Texotere, Rhone-Poulenc Rorer, Antony, Rnace
- toxotere methotrexate
- cisplatin melphalan
- vinblastine bleomycin
- etoposide ifosfamide
- mitomycin C mitoxantrone
- vincristine vinorelbine
- carboplatin teniposide, daunomycin, carminomycin, aminopterin, dactinomycin, mitomycins, esperamicins
- a “growth inhibitory agent” when used herein refers to a compound or composition which inhibits growth of a cell, especially cancer cell overexpressing any of the genes identified herein, either in vitro or in vivo.
- the growth inhibitory agent is one which significantly reduces the percentage of cells overexpressing such genes in S phase.
- growth inhibitory agents include agents that block cell cycle progression (at a place other than S phase), such as agents that induce G1 arrest and M-phase arrest.
- Classical M-phase blockers include the vincas (vincristine and vinblastine), taxol, and topo II inhibitors such as doxorubicin, epirubicin, daunorubicin, etoposide, and bleomycin.
- DNA alkylating agents such as tamoxifen, prednisone, dacarbazine, mechlorethamine, cisplatin, methotrexate, 5-fluorouracil, and ara-C.
- DNA alkylating agents such as tamoxifen, prednisone, dacarbazine, mechlorethamine, cisplatin, methotrexate, 5-fluorouracil, and ara-C.
- Doxorubicin is an anthracycline antibiotic.
- the full chemical name of doxorubicin is (8S-cis)-10-[(3-amino-
- cytokine is a generic term for proteins released by one cell population which act on another cell as intercellular mediators.
- cytokines are lymphokines, monokines, and traditional polypeptide hormones. Included among the cytokines are growth hormone such as human growth hormone, N-methionyl human growth hormone, and bovine growth hormone; parathyroid hormone; thyroxine; insulin; proinsulin; relaxin; prorelaxin; glycoprotein hormones such as follicle stimulating hormone (FSH), thyroid stimulating hormone (TSH), and luteinizing hormone (LH); hepatic growth factor; fibroblast growth factor; prolactin; placental lactogen; tumor necrosis factor- ⁇ and - ⁇ ; mullerian-inhibiting substance; mouse gonadotropin-associated peptide; inhibin; activin; vascular endothelial growth factor; integrin; thrombopoietin (TPO); nerve growth factors such as NGF; platelet-growth factor; transforming factor,
- prodrug refers to a precursor or derivative form of a pharmaceutically active substance that is less cytotoxic to tumor cells compared to the parent drug and is capable of being enzymatically activated or converted into the more active parent form. See, e.g., Wilman, "Prodrugs in Cancer
- the prodrugs of this invention include, but are not limited to, phosphate-containing prodrugs, thiophosphate-containing prodrugs, sulfate-containing prodrugs, peptide-containing prodrugs, D-amino acid- modified prodrugs, glysocylated prodrugs, ⁇ -lactam-containing prodrugs, optionally substituted phenoxyacetamide- containing prodrugs or optionally substituted phenylacetamide-containing prodrugs, 5-fluorocytosine and other 5- fluorouridine prodrugs which can be converted into the more active cytotoxic free drug.
- cytotoxic drugs that can be derivatized into a prodrug form for use in this invention include, but are not limited to, those chemotherapeutic agents described above.
- an "effective amount" of a polypeptide disclosed herein or an antagonist thereof, in reference to inhibition of neoplastic cell growth, tumor growth or cancer cell growth is an amount capable of inhibiting, to some extent, the growth of target cells.
- the term includes an amount capable of invoking a growth inhibitory, cytostatic and/or cytotoxic effect and/or apoptosis of the target cells.
- An "effective amount" of a polypeptide for the purposes of inhibiting neoplastic cell growth, tumor cell or cancer cell growth may be determined empirically and in a routine manner.
- a “therapeutically effective amount”, in reference to the treatment of tumor, refers to an amount capable of invoking one or more of the following effects: (1) inhibition, to some extent, of tumor growth, including, slowing down and complete growth arrest; (2) reduction in the number of tumor cells; (3) reduction in tumor size; (4) inhibition (i.e., reduction, slowing down or complete stopping) of tumor cell infiltration into peripheral organs; (5) inhibition (i.e., reduction, slowing down or complete stopping) of metastasis; (6) enhancement of anti-tumor immune response, which may, but does not have to, result in the regression or rejection of the tumor; and/or (7) relief, to some extent, of one or more symptoms associated with the disorder.
- a “therapeutically effective amount” of an anti-tumor agent may be determined empirically and in a routine manner.
- a “growth inhibitory amount” of an anti-tumor agent is an amount capable of inhibiting the growth of a cell, especially tumor, e.g. cancer cell, either in vitro or in vivo.
- a “cytotoxic amount” of an anti-tumor agent is an amount capable of causing the destruction of a cell, especially tumor, e.g. cancer cell, either in vitro or in vivo.
- the "cytotoxic amount” for purposes of inhibiting neoplastic cell growth may be determined empirically and in a routine manner.
- Antisense oligodeoxynucleotides or “antisense oligonucleotides” (which terms are used interchangeably) are defined as nucleic acid molecules that can inhibit the transcription and/or translation of target genes in a sequence- specific manner.
- the term “antisense” refers to the fact that the nucleic acid is complementary t the coding (“sense”) genetic sequence of the target gene.
- Antisense oligonucleotides hybridize in an antiparallel orientation to nascent mRNA through Watson-Crick base-pairing. By binding the target mRNA template, antisense oligonucleotides block the successful translation of the encoded protein.
- the term specifically includes antisense agents called "ribozomes” that have been designated to induce catalytic cleavage of a target RNA by addition of a sequence that has natural self- splicing activity (Warzocha and Wotowiec, "Antisense strategy" biological utility and prospects int he treatment of hematological malignancies.” Leuk. Lymphoma 24:267-281 [1997]).
- therapeutic index refers to the ratio between the toxic concentration and the effective concentration of a drug, such a therapeutic antibody.
- Wnt-1 was found as an oncogene activated by the Mouse Mammary Tumor Virus (MMTV) in murine breast cancer (Nusse and Varmus, -Ce// 31:99-109 (1982)).
- MMTV Mouse Mammary Tumor Virus
- APC adenomatous polyposis coli
- the present invention concerns the enhancement of the efficacy of treatment, such as immunotherapy, of tumors driven by Wnt signaling.
- drug targets for tumor treatment are identified by analyzing differences in gene expression resulting from retinoid treatment of tumor cells.
- the invention concerns the identification of antigens that are preferentially upregulated by the treatment of Wnt-transformed cells with retinoids, such as retinoic acid, as targets for cancer therapy.
- the preferred gene targets are those which express cell surface proteins, and which are synergistically upregulated by retinoid treatment and Wnt signaling.
- RNAse protection assays Hod, Biotechniques 13:852-854 (1992)
- RT-PCR reverse transcription polymerase chain reaction
- antibodies may be employed that can recognize specific duplexes, including DNA duplexes, RNA duplexes, and DNA-RNA hybrid duplexes or DNA-protein duplexes.
- RT-PCR Reverse Transcriotase PCR
- the first step is the isolation of mRNA from a target sample.
- the starting material is typically total RNA isolated from human tumors or tumor cell lines, and corresponding normal tissues or cell lines, respectively.
- RNA can be isolated from a variety of primary tumors, including breast, lung, colon, prostate, brain, liver, kidney, pancreas, spleen, thymus, testis, ovary, uterus, etc., tumor, or tumor cell lines, with pooled DNA from healthy donors.
- mRNA can be extracted, for example, from frozen or archived paraffin-embedded and fixed (e.g. formalin-fixed) tissue samples.
- Tumor cell lines include, for example, human lung carcinoma cell lines, such as A549 (SRCC768), Calu-1
- SRCC769 Calu-6 (SRCC770), H157 (SRCC771), H441 (SRCC772), H460 (SRCC773), SKMES-1 (SRCC774), SW900 (SRCC775), H522 (SRCC832),and H810 (SRCC833), all available from ATCC.
- SRCC724 adenocarcinoma, abbreviated as "AdenoCa”
- LDD adenocarcinoma
- SqCCa squamous cell carcinoma, abbreviated as "SqCCa”
- SRCC726 adenocarcinoma
- LT2 SRCC727 (adenocarcinoma) (LT3), SRCC728 (adenocarcinoma) (LT4), SRCC729 (squamous cell carcinoma) (LT6), SRCC730 (adeno/squamous cell carcinoma) (LT7), SRCC731 (adenocarcinoma) (LT9), SRCC732 (squamous cell carcinoma) (LT10), SRCC733 (squamous cell carcinoma) (LT11), SRCC734 (adenocarcinoma) (LT12), SRCC735 (adeno/squamous cell carcinoma) (LT13), SRCC736 (squamous cell carcinoma) (LT15), SRCC737 (squamous cell carcinoma) (LT16), SRCC738 (squamous cell carcinoma) (LT17), SRCC739 (squamous cell carcinoma) (LT18),
- SRCC740 (squamous cell carcinoma) (LT19), SRCC741 (lung cell carcinoma, abbreviated as "LCCa”) (LT21), SRCC811 (adenocarcinoma)(LT22), SRCC825(adenocarcinoma) (LT8), SRCC886 (adenocarcinoma) (LT25), SRCC887 (squamous cell carcinoma) (LT26), SRCC888 (adeno-BAC carcinoma) (LT27), SRCC889 (squamous cell carcinoma) (LT28), SRCC890 (squamous cell carcinoma) (LT29), SRCC891 (adenocarcinoma) (LT30), SRCC892 (squamous cell carcinoma) (LT31), SRCC894 (adenocarcinoma) (LT33). Also included are human lung tumors designated SRCC1125 [HF-
- Colon cancer cell lines include, for example, ATCC cell lines SW480 (adenocarcinoma, SRCC776), SW620 (lymph node metastasis of colon adenocarcinoma, SRCC777), Colo320 (carcinoma, SRCC778), HT29
- HM7 a high mucin producing variant of ATCC colon adenocarcinoma cell line, SRCC780, obtained from Dr. Robert Warren, UCSF
- CaWiDr adenocarcinoma, SRCC781
- HCT116 carcinoma, SRCC782
- SKC01 adenocarcinoma, SRCC783
- SW403 adenocarcinoma, SRCC784
- LS174T carcinoma, SRCC785
- Colo205 carcinoma, SRCC828)
- HCT15 carcinoma, SRCC829
- HCC2998 carcinoma, SRCC830
- KM12 carcinoma, SRCC831
- Primary colon tumors include colon adenocarcinomas designated CT2 (SRCC742), CT3 (SRCC743), CT8
- SRCC744 CT10 (SRCC745), CT12 (SRCC746), CT14 (SRCC747), CT15 (SRCC748), CT16 (SRCC749), CT17 (SRCC750), CT1 (SRCC751), CT4 (SRCC752), CT5 (SRCC753), CT6 (SRCC754), CT7 (SRCC755), CT9 (SRCC756), CT11 (SRCC757), CT18 (SRCC758), CT19 (adenocarcinoma, SRCC906), CT20 (adenocarcinoma, SRCC907), CT21 (adenocarcinoma, SRCC908), CT22 (adenocarcinoma, SRCC909), CT23 (adenocarcinoma, SRCC910), CT24 (adenocarcinoma, SRCC911), CT25 (adenocarcinoma, SRCC912), CT26 (adenocarcinoma, SRCC913), CT27
- SRCC1051 [HF-000499]
- SRCC1052 [HF-000539]
- SRCC1053 [HF- 000575]
- SRCC1054 [HF-000698]
- SRCC1142 [HF-000762]
- SRCC1 144 [HF-000789]
- SRCC1146 [HF-000795]
- Human breast carcinoma cell lines include, for example, HBL100 (SRCC759), MB435s (SRCC760), T47D (SRCC761), MB468 (SRCC762), MB175 (SRCC763), MB361 (SRCC764), BT20 (SRCC765), MCF7 (SRCC766), and SKBR3 (SRCC767), and human breast tumor center designated SRCC1057 [HF-000545]. Also included are human breast tumors designated SRCC1094, SRCC1095, SRCC1096, SRCC1097, SRCC1098, SRCC1099, SRCC1 100,
- SRCC1101 human breast-met-lung-NS tumor designated SRCC893 [LT 32].
- Human kidney tumor centers include SRCC989 [HF-000611] and SRCC1014 [HF-000613].
- Human testis tumor center includes SRCC1001 [HF-000733] and testis tumor margin SRCC999 [HF- 000716].
- Human parathyroid tumor includes SRCC1002 [HF-000831] and SRCC1003 [HF-000832].
- RNA isolation can be performed using purification kit, buffer set and protease from commercial manufacturers, such as Qiagen, according to the manufacturer's instructions.
- total RNA from cells in culture can be isolated using Qiagen RNeasy mini- columns.
- Total RNA from tissue samples can be isolated using RNA Stat-60 (Tel-Test).
- RNA prepared from tumor can be isolated, for example, by cesium chloride density gradient centrifugation.
- the present invention provides methods for identifying genes, preferably cell surface antigens, the expression of which is selectively enhanced by retinoid treatment in tumor cells driven by Wnt signaling.
- a preferred source of the mRNA is a tissue sample or cell line derived from a tumor the development and/or progression of which is associated with defects in the Wnt signaling pathway.
- Wnt- 1 a Wnt proto-oncogene
- a Wnt proto-oncogene can be a source of mRNA, before and after retinoid treatment, and in the presence of absence of Wnt (e.g. Wnt-1) expression.
- RNA cannot serve as a template for PCR
- the first step in gene expression profiling by RT-PCR is the reverse transcription of the RNA template into cDNA, followed by its exponential amplification in a PCR reaction.
- the two most commonly used reverse transcriptases are avilo myeloblastosis virus reverse transcriptase (AMV-RT) and
- MMLV-RT Moloney murine leukemia virus reverse transcriptase
- the reverse transcription step is typically primed using specific primers, random hexamers, or oligo-dT primers, depending on the circumstances and the goal of expression profiling.
- extracted RNA can be reverse-transcribed using a GeneAmp RNA PCR kit (Perkin Elmer, CA, USA), following the manufacturer's instructions.
- the derived cDNA can then be used as a template in the subsequent PCR reaction.
- the PCR step can use a variety of thermostable DNA-dependent DNA polymerases, it typically employs the Taq DNA polymerase, which has a 5'-3' nuclease activity but lacks a 3'-5' proofreading endonuclease activity.
- TaqMan PCR typically utilizes the 5'-nuclease activity of Taq or Tth polymerase to hydrolyze a hybridization probe bound to its target amplicon, but any enzyme with equivalent 5' nuclease activity can be used.
- Two oligonucleotide primers are used to generate an amplicon typical of a PCR reaction.
- a third oligonucleotide, or probe is designed to detect nucleotide sequence located between the two PCR primers.
- the probe is non-extendible by Taq DNA polymerase enzyme, and is labeled with a reporter fluorescent dye and a quencher fluorescent dye. Any laser-induced emission from the reporter dye is quenched by the quenching dye when the two dyes are located close together as they are on the probe.
- the Taq DNA polymerase enzyme cleaves the probe in a template-dependent manner.
- the resultant probe fragments disassociate in solution, and signal from the released reporter dye is free from the quenching effect of the second fluorophore.
- One molecule of reporter dye is liberated for each new molecule synthesized, and detection of the unquenched reporter dye provides the basis for quantitative interpretation of the data.
- TaqMan RT-PCR can be performed using commercially available equipments, such as, for example, ABI PRIZM 7700TM Sequence Detection SystemTM (Perkin-Elmer-Applied Biosystems, Foster City, CA, USA), or Lightcycler
- the 5' nuclease procedure is run on a real-time quantitative PCR device such as the ABI PRIZM 7700TM Sequence Detection SystemTM.
- the system consists of a thermocycler, laser, charge-coupled device (CCD), camera and computer.
- the system amplifies samples in a 96-well format on a thermocycler.
- laser-induced fluorescent signal is collected in real-time through fiber optics cables for all 96 wells, and detected at the CCD.
- the system includes software for running the instrument and for analyzing the data.
- 5'-Nuclease assay data are initially expressed as Ct, or the threshold cycle.
- Ct fluorescence values are recorded during every cycle and represent the amount of product amplified to that point in the amplification reaction.
- the point when the fluorescent signal is first recorded as statistically significant is the threshold cycle (C t ).
- the ⁇ Ct values are used as quantitative measurement of the relative number of starting copies of a particular target sequence in a nucleic acid sample when comparing the expression of RNA in a cancer cell with that from a normal cell.
- RT-PCR is usually performed using an internal standard.
- the ideal internal standard is expressed at a constant level among different tissues, and is unaffected by the experimental treatment.
- RNAs most frequently used to normalize patterns of gene expression are mRNAs for the housekeeping genes glyceraldehyde-3-phosphate-dehydrogenase (GAPDH) and ⁇ -actin.
- GPDH glyceraldehyde-3-phosphate-dehydrogenase
- ⁇ -actin glyceraldehyde-3-phosphate-dehydrogenase
- Differential gene expression can also be identified, or confirmed using the microarray technique.
- nucleotide sequences of interest are plated, or arrayed, on a microchip substrate.
- the arrayed sequences are then hybridized with specific DNA probes from cells or tissues of interest.
- the genes targeted by the present invention can be identified by constructing normalized and subtracted cDNA libraries from mRNA extracted from tumor cells or tissues, and the cells or tissue of healthy subjects; purifying the DNA from the cDNA; treating both tumor and healthy samples under otherwise identical conditions with a retinoid; microarraying the purified DNA for expression analysis; and probing microarrays to identify the genes from the clones that are selectively upregulated by retinoid treatment in the tumor cells or tissues, relative to corresponding normal cells or tissues.
- the source of mRNA typically is total RNA isolated from human tumors or tumor cell lines, and corresponding normal tissues or cell lines. Thus RNA can be isolated from a variety of primary tumors or tumor cell lines, including those listed above. If the source of mRNA is a primary tumor, mRNA can be extracted, for example, from frozen or archived paraffin- embedded and fixed (e.g. formalin-fixed) tissue samples, which are routinely prepared and preserved in everyday clinical practice.
- PCR amplified inserts of cDNA clones are applied to a substrate in a dense array.
- the microarrayed genes, immobilized on the microchip at 10,000 elements each, are suitable for hybridization under stringent conditions.
- Fluorescently labeled cDNA probes may be generated through incorporation of fluorescent nucleotides by reverse transcription of RNA extracted from tissues of interest. Labeled cDNA probes applied to the chip hybridize with specificity to each spot of DNA on the array. After stringent washing to remove non-specifically bound probes, the chip is scanned by confocal laser microscopy.
- Quantitation of hybridization of each arrayed element allows for assessment of corresponding mRNA abundance.
- dual color fluorescence separately labeled cDNA probes generated from two sources of RNA are hybridized pairwise to the array. The relative abundance of the transcripts from the two sources corresponding to each specified gene is thus determined simultaneously.
- the miniaturized scale of the hybridization affords a convenient and rapid evaluation of the expression pattern for large numbers of genes. Such methods have been shown to have the sensitivity required to detect rare transcripts, which are expressed at a few copies per cell, and to reproducibly detect at least approximately two-fold differences in the expression levels (Schena et al., Proc. Natl. Acad. Sci. USA 93(20): 106-49 (1996)).
- the crust of the present invention is the identification of genes the expression of which is selectively enhanced by retinoid treatment in cancer cells driven by Wnt signaling, relative to normal cells.
- the gene expression profile of tumor cells characterized by the involvement of the Wnt signaling pathway is determined in the presence and absence of Wnt, e.g. Wnt-1 expression, and in the presence and absence of retinoid treatment.
- genes are identified, the expression of which is selectively upregulated by retinoid treatment of Wnt- expressing tumor cells, relative to normal cells treated with the same retinoid, and, preferably, also relative to tumor cells not expressing Wnt, with or without retinoid treatment.
- the retinoid may be a retinoic acid (also known as tretinoin, vitamin A acid or vitamin A,), including both all-tra/w-retinoic acid (all-tra/w-RA) and -cis- retinoic acid (9-c s-RA), and retinoic acid derivatives consisting of four isoprenoid units joined in a head-to-tail manner, such as retinol, retinal, substituted retinoids, seco-, nor-, and retro-retinoids. All retinoids may be formally derived from a monocyclic parent compound containing five carbon-carbon double bonds and a functional group at the terminus of the acyclic portion.
- the gene targets identified in accordance with the present invention and the treatment methods herein can be further validated in cell-based tumor assays.
- the role of genes and gene products identified herein in the development and pathology of tumor or cancer can be tested by using primary tumor cells or cell lines that have been identified to amplify the genes herein.
- Such cells include, for example, the breast, colon and lung cancer cells and cell lines listed above.
- cells of a cell type known to be involved in a particular tumor are transfected with the cDNAs encoding the cell surface proteins identified herein, and the ability of these cDNAs to induce excessive growth is analyzed.
- Suitable cells include, for example, stable tumor cells lines such as, the B104-1-1 cell line (stable NIH-3T3 cell line transfected with the neu protooncogene) and /zw-transfected NIH-3T3 cells, which can be transfected with the desired gene, and monitored for tumorigenic growth.
- transfected cell lines can then be used to test the ability of anti-tumor agents, such as poly- or monoclonal antibodies or antibody compositions in combination with retinoids to inhibit tumorigenic cell growth by exerting cytostatic or cytotoxic activity on the growth of the transformed cells, or by mediating antibody-dependent cellular cytotoxicity (ADCC), in the presence of absence of retinoid treatment.
- Anti-tumor agents such as poly- or monoclonal antibodies or antibody compositions in combination with retinoids to inhibit tumorigenic cell growth by exerting cytostatic or cytotoxic activity on the growth of the transformed cells, or by mediating antibody-dependent cellular cytotoxicity (ADCC), in the presence of absence of retinoid treatment.
- ADCC antibody-dependent cellular cytotoxicity
- Animal models of tumors and cancers include both non-recombinant and recombinant (transgenic) animals.
- Non-recombinant animal models include, for example, rodent, e.g., murine models.
- Such models can be generated by introducing tumor cells into s ⁇ ngeneic mice using standard techniques, e.g., subcutaneous injection, tail vein injection, spleen implantation, intraperitoneal implantation, implantation under the renal capsule, or orthopin implantation, e.g., colon cancer cells implanted in colonic tissue.
- standard techniques e.g., subcutaneous injection, tail vein injection, spleen implantation, intraperitoneal implantation, implantation under the renal capsule, or orthopin implantation, e.g., colon cancer cells implanted in colonic tissue.
- nude mice Probably the most often used animal species in oncological studies are immunodeficient mice and, in particular, nude mice.
- the autosomal recessive nu gene has been introduced into a very large number of distinct congenic strains of nude mouse, including, for example, ASW, A/He,
- AKR AKR, BALB/c, B10.LP, C17, C3H, C57BL, C57, CBA, DBA, DDD, I/st, NC, NFR, NFS, NFS/N, NZB, NZC, NZW, P, Rill and SJL.
- a wide variety of other animals with inherited immunological defects other than the nude mouse have been bred and used as recipients of tumor xenografts. For further details see, e.g., The Nude Mouse in Oncology Research, E. Boven and B. Winograd, eds., CRC Press, Inc., 1991.
- the cells introduced into such animals can be derived from known tumor/cancer cell lines, such as, for example, the Wnt-1 transfected murine C57MG breast epithelial cell line used in the examples herein, stably expressing Wnt-1 (see also Diatchenko et al., Proc. Natl. Acad. Sci.
- Tumor cells can be introduced into animals, such as nude mice, by a variety of procedures.
- the subcutaneous (s.c.) space in mice is very suitable for tumor implantation.
- Tumors can be transplanted s.c. as solid blocks, as needle 02/18608
- tumor tissue fragments of suitable size are introduced into the s.c. space.
- Cell suspensions are freshly prepared from primary tumors or stable tumor cell lines, and injected subcutaneously. Tumor cells can also be injected as subdermal implants. In this location, the inoculum is deposited between the lower part of the dermal connective tissue and the s.c. tissue. Boven and Winograd (1991), *57//? ⁇ ?.
- Animal models of breast cancer can be generated, for example, by implanting rat neuroblastoma cells (from which the neu oncogene was initially isolated), or NIH-3T3 cells into nude mice, essentially as described by Drebin etal., PNAS USA, 83:9129-9133 (1986).
- animal models of colon cancer can be generated by passaging colon cancer cells in animals, e.g., nude mice, leading to the appearance of tumors in these animals.
- An orthotopic transplant model of human colon cancer in nude mice has been described, for example, by Wang etal., Cancer Research, 54:4726-4728 (1994) and Too etal, Cancer Research, 55:681-684 (1995). This model is based on the so-called "METAMOUSE" sold by AntiCancer,
- Tumors that arise in animals can be removed and cultured in vitro. Cells from the in vitro cultures can then be passaged to animals. Such tumors can serve as targets for further testing or drug screening. Alternatively, the tumors resulting from the passage can be isolated and RNA from pre-passage cells and cells isolated after one or more rounds of passage analyzed for differential expression of genes of interest. Such passaging techniques can be performed with any known tumor or cancer cell lines.
- Meth A, CMS4, CMS5, CMS21, and WEHI-164 are chemically induced fibrosarcomas of BALB/c female mice (DeLeo etal., J. Exp. Med., 146:720 (1977)), which provide a highly controllable model system for studying the anti-tumor activities of various agents (Palladino et al., J. Immunol., 138:4023-4032 (1987)). Briefly, tumor cells are propagated in vitro in cell culture. Prior to injection into the animals, the cell lines are washed and suspended in buffer, at a cell density of about 10x10 6 to 10x 10 7 cells/ml.
- the animals are then infected subcutaneously with 10 to 100 yI of the cell suspension, allowing one to three weeks for a tumor to appear.
- the Lewis lung (3LL) carcinoma of mice which is one of the most thoroughly studied experimental tumors, can be used as an investigational tumor model. Efficacy in this tumor model has been correlated with beneficial effects in the treatment of human patients diagnosed with small cell carcinoma of the lung (SCCL).
- SCCL small cell carcinoma of the lung
- This tumor can be introduced in normal mice upon injection of tumor fragments from an affected mouse or of cells maintained in culture (Zupi et al., Br. J. Cancer, 41:suppl. 4:309 (1980)), and evidence indicates that tumors can be started from injection of even a single cell and that a very high proportion of infected tumor cells survive. For further information about this tumor model see, Zacharski, Haemostasis, 16:300-320 (1986)).
- One way of evaluating the efficacy of a test compound in an animal model on an implanted tumor is to measure the size of the tumor before and after treatment.
- the size of implanted tumors has been measured with a slide caliper in two or three dimensions.
- the measure limited to two dimensions does not accurately reflect the size of the tumor, therefore, it is usually converted into the corresponding volume by using a mathematical formula.
- the measurement of tumor size is very inaccurate.
- the therapeutic effects of a drug candidate can be better described as treatment-induced growth delay and specific growth delay.
- Another important variable in the description of tumor growth is the tumor volume doubling time.
- Computer programs for the calculation and description of tumor growth are also available, such as the program reported by Rygaard and Spang-Thomsen, Proc. 6th Int.
- necrosis and inflammatory responses following treatment may actually result in an increase in tumor size, at least initially. Therefore, these changes need to be carefully monitored, by a combination of a morphometric method and flow cytometric analysis.
- Recombinant (transgenic) animal models can be engineered by introducing the coding portion of the genes identified herein into the genome of animals of interest, using standard techniques for producing transgenic animals.
- Animals that can serve as a target for transgenic manipulation include, without limitation, mice, rats, rabbits, guinea pigs, sheep, goats, pigs, and non-human primates, e.g., baboons, chimpanzees and monkeys.
- Techniques known in the art to introduce a transgene into such animals include pronucleic microinjection (Hoppe and Wanger, U.S. Patent No. 4,873,191); retrovirus-mediated gene transfer into germ lines (e.g., Van der Putten et al., Proc. Natl. Acad. Sci.
- transgenic animals include those that carry the transgene only in part of their cells ("mosaic animals").
- the transgene can be integrated either as a single transgene, or in concatamers, e.g., head-to-head or head-to-tail tandems. Selective introduction of a transgene into a particular cell type is also possible by following, for example, the technique of Lasko etal., Proc. Natl. Acad. Sci. USA, 89:6232-636 (1992).
- the expression of the transgene in transgenic animals can be monitored by standard techniques. For example, Southern blot analysis or PCR amplification can be used to verify the integration of the transgene. The level of mRNA expression can then be analyzed using techniques such as in situ hybridization, Northern blot analysis, PCR, or immunocytochemistry. The animals are further examined for signs of tumor or cancer development.
- "knock out" animals can be constructed which have a defective or altered gene encoding a protein (e.g. a cell surface protein) identified herein, as a result of homologous recombination between the endogenous gene encoding the protein and altered genomic DNA encoding the same protein introduced into an embryonic cell of the animal.
- a protein e.g. a cell surface protein
- genomic DNA encoding the same protein introduced into an embryonic cell of the animal.
- cDNA encoding such protein can be used to clone genomic DNA encoding the protein in accordance with established techniques.
- a portion of the genomic DNA encoding a particular protein can be deleted or replaced with another gene, such as a gene encoding a selectable marker which can be used to monitor integration.
- flanking DNA typically, several kilobases of unaltered flanking DNA (both at the 5' and 3' ends) are included in the vector [see, e.g., Thomas and Capecchi, Cell, 51:503 (1987) for a description of homologous recombination vectors].
- the vector is introduced into an embryonic stem cell line (e.g., by electroporation) and cells in which the introduced DNA has homologously recombined with the endogenous DNA are selected (see, e.g., Li et al., Cell, 69:915 (1992)).
- the selected cells are then injected into a blastocyst of an animal (e.g., a mouse or rat) to form aggregation chimeras [see, e.g., Bradley, in Teratocarcinomas and Embryonic Stem Cells: A Practical Approach, E. J. Robertson, ed. (IRL, Oxford, 1987), pp. 113-152].
- a chimeric embryo can then be implanted into a suitable pseudopregnant female foster animal and the embryo brought to term to create a "knock out" animal.
- Progeny harboring the homologously recombined DNA in their germ cells can be identified by standard techniques and used to breed animals in which all cells of the animal contain the homologously recombined DNA.
- Knockout animals can be characterized for instance, by their ability to defend against certain pathological conditions and by their development of pathological conditions due to absence of the absent protein.
- SCC feline oral squamous cell carcinoma
- Feline oral SCC is a highly invasive, malignant tumor that is the most common oral malignancy of cats, accounting for over 60% of the oral tumors reported in this species. It rarely metastasizes to distant sites, although this low incidence of metastasis may merely be a reflection of the short survival times for cats with this tumor.
- These tumors are usually not amenable to surgery, primarily because of the anatomy of the feline oral cavity. At present, there is no effective treatment for this tumor.
- each cat Prior to entry into the study, each cat undergoes complete clinical examination, biopsy, and is scanned by computed tomography (CT). Cats diagnosed with sublingual oral squamous cell tumors are excluded from the study. The tongue can become paralyzed as a result of such tumor, and even if the treatment kills the tumor, the animals may not be able to feed themselves.
- CT computed tomography
- Each cat is treated repeatedly, over a longer period of time. Photographs of the tumors will be taken daily during the treatment period, and at each subsequent recheck.
- CT scans and thoracic radiograms are evaluated every 8 weeks thereafter. The data are evaluated for differences in survival, response and toxicity as compared to control groups. Positive response may require evidence of tumor regression, preferably with improvement of quality of life and/or increased life span.
- fibrosarcoma adenocarcinoma
- lymphoma adenocarcinoma
- chrondroma adenocarcinoma of dogs, cats
- baboons a preferred model as its appearance and behavior are very similar to those in humans.
- the use of this model is limited by the rare occurrence of this type of tumor in animals.
- the tumor antigens identified herein are desirable targets for cancer therapy, since selective enhancement of their expression by retinoid treatment relative to normal cells is expected to improve the efficacy and therapeutic index of cancer therapeutics directed against these antigens. This is generally true for any antagonist of a tumor antigen identified in accordance with the present invention. a. Antagonists
- Antagonists include oligonucleotides that bind to a tumor antigen, and, in particular, antibodies including, without limitation, poly- and monoclonal antibodies and antibody fragments, single-chain antibodies, anti-idiotypic antibodies, and chimeric or humanized versions of such antibodies or fragments, as well as human antibodies and antibody fragments.
- a potential antagonist may be a closely related protein, for example, a mutated form of the tumor antigen that recognizes its receptor but imparts no effect (e.g. a stra ⁇ , ephrin b1, 4-1BB ligand, autotaxin or ISRL variant), thereby competitively inhibiting the action of the tumor antigen.
- Other antagonist may be an antisense RNA or DNA construct prepared using antisense technology, where, e.g., an antisense RNA or DNA molecule acts to block directly the translation of mRNA by hybridizing to targeted mRNA and preventing protein translation.
- Antisense technology can be used to control gene expression through triple- helix formation or antisense DNA or RNA, both of which methods are based on binding of a polynucleotide to DNA or RNA.
- the 5' coding portion of the polynucleotide sequence which encodes a mature tumor antigen herein, is used to design an antisense RNA oligonucleotide of from about 10 to 40 base pairs in length.
- a DNA oligonucleotide is designed to be complementary to a region of the gene involved in transcription (triple helix - see, lee et al, Nucl. Acids Res., 6:3073 (1979); Cooney et al, Science, 241: 456 (1988); Dervan et al., Science, 251:1360 (1991)), thereby preventing transcription and the production of the target polypeptide.
- the antisense RNA oligonucleotide hybridizes to the mRNA in vivo and blocks translation of the mRNA molecule into the target polypeptide (antisense • Okano, Neurochem., 56:560 (1991); Oligodeoxynucleotides as Antisense Inhibitors of Gene Expression (CRC Press: Boca Raton, FL, 1988).
- the oligonucleotides described above can also be delivered to cells such that the antisense RNA or DNA may be expressed in vivo to inhibit production of the target polypeptide.
- antisense DNA is used, oligodeoxyribonucleotides derived from the translation-initiation site, e.g., between about -10 and + 10 positions of the target gene nucleotide sequence, are preferred.
- Antisense RNA or DNA molecules are generally at least about 5 bases in length, about 10 bases in length, about 15 bases in length, about 20 bases in length, about 25 bases in length, about 30 bases in length, about 35 bases in length, about 40 bases in length, about 45 bases in length, about 50 bases in length, about 55 bases in length, about 60 bases in length, about 65 bases in length, about 70 bases in length, about 75 bases in length, about 80 bases in length, about 85 bases in length, about 90 bases in length, about 95 bases in length, about 100 bases in length, or more.
- Potential antagonists include small molecules that bind to the active site, the receptor binding site, or growth factor or other relevant binding site of a tumor antigen identified herein, thereby blocking its normal biological activity.
- small molecules include, but are not limited to, small peptides or peptide-like molecules, preferably soluble peptides, and synthetic non-peptidyl organic or inorganic compounds. These small molecules can be identified by screening techniques well known for those skilled in the art.
- Ribozymes are enzymatic RNA molecules capable of catalyzing the specific cleavage of RNA. Ribozymes act by sequence-specific hybridization to the complementary target RNA, followed by endonucleolytic cleavage. Specific ribozyme cleavage sites within a potential RNA target can be identified by known techniques. For further details see, e.g., Rossi, Current Biology, 4:469-471 (1994), and PCT publication No. WO 97/33551 (published September 18, 1997).
- Nucleic acid molecules in triple-helix formation used to inhibit transcription should be single-stranded and composed of deoxynucleotides.
- the base composition of these oligonucleotides is designed such that it promotes triple-helix formation via Hoogsteen base-pairing rules, which generally require sizeable stretches of purines or pyrimidines on one strand of a duplex.
- the antagonists used in the treatments methods of the present invention are antibodies that are capable of specific binding a tumor antigen identified in accordance with the present invention.
- Retinoid (e.g. retinoic acid) treatment will selectively upregulate the tumor antigen identified, and improve the efficacy and therapeutic index of antibodies directed against such tumor antigens.
- Polyclonal antibodies can be raised in a mammal, for example, by one or more injections of an immunizing agent and, if desired, an adjuvant.
- the immunizing agent and/or adjuvant will be injected in the mammal by multiple subcutaneous or intraperitoneal injections.
- the immunizing agent may include the polypeptide identified in accordance with the present invention or a fusion protein thereof. It may be useful to conjugate the immunizing agent to a protein known to be immunogenic in the mammal being immunized.
- immunogenic proteins include but are not limited to keyhole limpet hemocyanin, serum albumin, bovine thyroglobulin, and soybean trypsin inhibitor.
- adjuvants which may be employed include Freund's complete adjuvant and MPL-TDM adjuvant (monophosphoryl Lipid A, synthetic trehalose dicorynomycolate).
- the immunization protocol may be selected by one skilled in the art without undue experimentation.
- the antibodies may, alternatively, be monoclonal antibodies.
- Monoclonal antibodies may be prepared using hybridoma methods, such as those described by Kohler and Milstein, Nature, 256:495 (1975). In a hybridoma method, a mouse, hamster, or other appropriate host animal, is typically immunized with an immunizing agent to elicit lymphocytes that produce or are capable of producing antibodies that will specifically bind to the immunizing agent.
- the lymphocytes may be immunized in vitro.
- the immunizing agent will typically include the polypeptide to which the antibody binds or a fusion protein thereof.
- PBLs peripheral blood lymphocytes
- spleen cells or lymph node cells are used if non-human mammalian sources are desired.
- the lymphocytes are then fused with an immortalized cell line using a suitable fusing agent, such as polyethylene glycol, to form a hybridoma cell (Goding, Monoclonal Antibodies: Principles and Practice, Academic Press, (1986) pp. 59-103).
- Immortalized cell lines are usually transformed mammalian cells, particularly myeloma cells of rodent, bovine and human origin.
- rat or mouse myeloma cell lines are employed.
- the hybridoma cells may be cultured in a suitable culture medium that preferably contains one or more substances that inhibit the growth or survival of the unfused, immortalized cells.
- a suitable culture medium that preferably contains one or more substances that inhibit the growth or survival of the unfused, immortalized cells.
- the culture medium for the hybridomas typically will include hypoxanthine, aminopterin, and thymidine (“HAT medium”), which substances prevent the growth of HGPRT-deficient cells.
- Preferred immortalized cell lines are those that fuse efficiently, support stable high level expression of antibody by the selected antibody-producing cells, and are sensitive to a medium such as HAT medium. More preferred immortalized cell lines are murine myeloma lines, which can be obtained, for instance, from the Salk Institute Cell Distribution Center, San Diego, California and the American Type Culture Collection, Manassas, Virginia. Human myeloma and mouse-human heteromyeloma cell lines also have been described for the production of human monoclonal antibodies (Kozbor, J. Immunol., 133:3001 (1984); Brodeur et al., Monoclonal Antibody Production Techniques and Applications, Marcel Dekker, Inc., New York, (1987) pp. 51-63).
- the culture medium in which the hybridoma cells are cultured can then be assayed for the presence of monoclonal antibodies directed against PR010282.
- the binding specificity of monoclonal antibodies produced by the hybridoma cells is determined by immunoprecipitation or by an in vitro binding assay, such as radioimmunoassay (RIA) or enzyme-linked immunoabsorbent assay (ELISA).
- RIA radioimmunoassay
- ELISA enzyme-linked immunoabsorbent assay
- the binding affinity of the monoclonal antibody can, for example, be determined by the Scatchard analysis of
- the clones may be subcloned by limiting dilution procedures and grown by standard methods [Goding, supra]. Suitable culture media for this purpose include, for example, Dulbecco's Modified Eagle's Medium and RPMI-1640 medium. Alternatively, the hybridoma cells may be grown /// vivo as ascites in a mammal.
- the monoclonal antibodies secreted by the subclones may be isolated or purified from the culture medium or ascites fluid by conventional immunoglobulin purification procedures such as, for example, protein A-Sepharose, hydroxylapatite chromatography, gel electrophoresis, dialysis, or affinity chromatography.
- the monoclonal antibodies may also be made by recombinant DNA methods, such as those described in U.S. Patent No. 4,816,567.
- DNA encoding the monoclonal antibodies of the invention can be readily isolated and sequenced using conventional procedures (e.g., by using oligonucleotide probes that are capable of binding specifically to genes encoding the heavy and light chains of murine antibodies).
- the hybridoma cells of the invention serve as a preferred source of such DNA.
- the DNA may be placed into expression vectors, which are then transfected into host cells such as simian COS cells, Chinese hamster ovary (CHO) cells, or myeloma cells that do not otherwise produce immunoglobulin protein, to obtain the synthesis of monoclonal antibodies in the recombinant host cells.
- host cells such as simian COS cells, Chinese hamster ovary (CHO) cells, or myeloma cells that do not otherwise produce immunoglobulin protein
- Prokaryotic hosts, such as £ coli are also suitable for the recombinant production of the antibodies herein.
- the DNA also may be modified, for example, by substituting the coding sequence for human heavy and light chain constant domains in place of the homologous murine sequences (U.S. Patent No.
- non-immunoglobulin polypeptide can be substituted for the constant domains of an antibody of the invention, or can be substituted for the variable domains of one antigen-combining site of an antibody of the invention to create a chimeric bivalent antibody.
- the antibodies may be monovalent antibodies.
- Methods for preparing monovalent antibodies are well known in the art. For example, one method involves recombinant expression of immunoglobulin light chain and modified heavy chain.
- the heavy chain is truncated generally at any point in the Fc region so as to prevent heavy chain crosslinking.
- cysteine residues are substituted with another amino acid residue or are deleted so as to prevent crosslinking.
- In vitro methods are also suitable for preparing monovalent antibodies. Digestion of antibodies to produce fragments thereof, particularly. Fab fragments, can be accomplished using routine techniques known in the art.
- the antibodies suitable for use in the treatment methods of the invention may further comprise humanized antibodies or human antibodies.
- Humanized forms of non-human (e.g., murine) antibodies are chimeric immunoglobulins, immunoglobulin chains or fragments thereof (such as Fv, Fab, Fab', F(ab') 2 or other antigen-binding subsequences of antibodies) which contain minimal sequence derived from non-human immunoglobulin.
- Humanized antibodies include human immunoglobulins (recipient antibody) in which residues from a complementary determining region (CDR) of the recipient are replaced by residues from a CDR of a non-human species (donor antibody) such as mouse, rat or rabbit having the desired specificity, affinity and capacity.
- CDR complementary determining region
- donor antibody such as mouse, rat or rabbit having the desired specificity, affinity and capacity.
- Fv framework residues of the human immunoglobulin are replaced by corresponding non-human residues.
- Humanized antibodies may also comprise residues which are
- the humanized antibody will comprise substantially all of at least one, and typically two, variable domains, in which all or substantially all of the CDR regions correspond to those of a non-human immunoglobulin and all or substantially all of the FR regions are those of a human immunoglobulin consensus sequence.
- the humanized antibody optimally also will comprise at least a portion of an immunoglobulin constant region (Fc), typically that of a human immunoglobulin (Jones et al., Nature, 321:522-525 (1986); Riechmann et al., Nature, 332:323-329 (1988); and
- a humanized antibody has one or more amino acid residues introduced into it from a source which is non-human. These non-human amino acid residues are often referred to as "import" residues, which are typically taken from an "import” variable domain. Humanization can be essentially performed following the method of Winter and co-workers (Jones et al., Nature, 321 :522-525 (1986); Riechmann et al., Nature, 332:323-327 (1988); Verhoeyen et al., Science, 239:1534-1536 (1988)), by substituting rodent CDRs or CDR sequences for the corresponding sequences of a human antibody.
- humanized antibodies are chimeric antibodies (U.S. Patent No. 4,816,567), wherein substantially less than an intact human variable domain has been substituted by the corresponding sequence from a non-human species.
- humanized antibodies are typically human antibodies in which some CDR residues and possibly some FR residues are substituted by residues from analogous sites in rodent antibodies.
- Human antibodies can also be produced using various techniques known in the art, including phage display libraries (Hoogenboom and Winter, J. Mol. Biol., 227:381 (1991); Marks et al., J. Mol. Biol., 222:581 (1991)).
- the techniques of Cole et al. and Boerner et al. are also available for the preparation of human monoclonal antibodies (Cole et al.. Monoclonal Antibodies and Cancer Therapy, Alan R. Liss, p. 77 (1985) and Boerner et al., J. Immunol.,
- human antibodies can be made by introducing of human immunoglobulin loci into transgenic animals, e.g., mice in which the endogenous immunoglobulin genes have been partially or completely inactivated. Upon challenge, human antibody production is observed, which closely resembles that seen in humans in all respects, including gene rearrangement, assembly, and antibody repertoire. This approach is described, for example, in U.S. Patent Nos.
- Bispecific antibodies are monoclonal, preferably human or humanized, antibodies that have binding specificities for at least two different antigens.
- one of the binding specificities is for the target protein, the other one is for any other antigen, and preferably for a cell-surface protein or receptor or receptor subunit.
- bispecific antibodies are known in the art. Traditionally, the recombinant production of bispecific antibodies is based on the co-expression of two immunoglobulin heavy-chain/light-chain pairs, where the two heavy chains have different specificities (Milstein and Cuello, Nature, 305:537-539 (1983)). Because of the random assortment of immunoglobulin heavy and light chains, these hybridomas (quadromas) produce a potential mixture of ten different antibody molecules, of which only one has the correct bispecific structure. The purification of the correct molecule is usually accomplished by affinity chromatography steps. Similar procedures are disclosed in WO 93/08829, published 13 May 1993, and in Traunecker et al., EMBOJ., 10:3655-3659 (1991).
- Antibody variable domains with the desired binding specificities can be fused to immunoglobulin constant domain sequences.
- the fusion preferably is with an immunoglobulin heavy-chain constant domain, comprising at least part of the hinge, CH2, and CH3 regions. It is preferred to have the first heavy- chain constant region (CH1) containing the site necessary for light-chain binding present in at least one of the fusions.
- DNAs encoding the immunoglobulin heavy-chain fusions and, if desired, the immunoglobulin light chain are inserted into separate expression vectors, and are co-transfected into a suitable host organism.
- the interface between a pair of antibody molecules can be engineered to maximize the percentage of heterodimers which are recovered from recombinant cell culture.
- the preferred interface comprises at least a part of the CH3 region of an antibody constant domain.
- one or more small amino acid side chains from the interface of the first antibody molecule are replaced with larger side chains (e.g. tyrosine or tryptophan).
- Compensatory "cavities" of identical or similar size to the large side chain(s) are created on the interface of the second antibody molecule by replacing large amino acid side chains with smaller ones (e.g. alanine or threonine). This provides a mechanism for increasing the yield of the heterodimer over other unwanted end-products such as homodimers.
- Bispecific antibodies can be prepared as full length antibodies or antibody fragments (e.g. F(ab'), bispecific antibodies). Techniques for generating bispecific antibodies from antibody fragments have been described in the literature. For example, bispecific antibodies can be prepared can be prepared using chemical linkage. Brennan et al., Science 229:81 (1985) describe a procedure wherein intact antibodies are proteolytically cleaved to generate F(ab') 2 fragments. These fragments are reduced in the presence of the dithiol complexing agent sodium arsenite to stabilize vicinal dithiols and prevent intermolecular disulfide formation. The Fab' fragments generated are then converted to thionitrobenzoate (TNB) derivatives.
- TAB thionitrobenzoate
- One of the Fab'-TNB derivatives is then reconverted to the Fab'-thiol by reduction with mercaptoethylamine and is mixed with an equimolar amount of the other Fab'-TNB derivative to form the bispecific antibody.
- the bispecific antibodies produced can be used as agents for the selective immobilization of enzymes.
- Fab' fragments may be directly recovered from £ coli and chemically coupled to form bispecific antibodies.
- Shalaby et al., J. Exp. Med. 175:217-225 (1992) describe the production of a fully humanized bispecific antibody F(ab') 2 molecule.
- Each Fab' fragment was separately secreted from £ coli an ⁇ subjected to directed chemical coupling in vitro to form the bispecific antibody.
- the bispecific antibody thus formed was able to bind to cells overexpressing the ErbB2 receptor and normal human T cells, as well as trigger the lytic activity of human cytotoxic lymphocytes against human breast tumor targets.
- bispecific antibodies have been produced using leucine zippers.
- the leucine zipper peptides from the Fos and Jun proteins were linked to the Fab' portions of two different antibodies by gene fusion.
- the antibody homodimers were reduced at the hinge region to form monomers and then re-oxidized to form the antibody heterodimers. This method can also be utilized for the production of antibody homodimers.
- the fragments comprise a heavy-chain variable domain (V H ) connected to a light-chain variable domain (V L ) by a linker which is too short to allow pairing between the two domains on the same chain. Accordingly, the V H and V L 02/18608
- Exemplary bispecific antibodies may bind to two different epitopes on a given polypeptide (e.g. cell surface antigen) identified herein.
- a given polypeptide e.g. cell surface antigen
- one arm of the antibody, which binds to target polypeptide may be combined with an arm which binds to a triggering molecule on a leukocyte such as a T-cell receptor molecule (e.g. CD2, CD3, CD28, or B7), or Fc receptors for IgG (Fc R), such as Fc Rl (CD64), Fc RII (CD32) and Fc Rill (CD 16) so as to focus cellular defense mechanisms to the cell expressing the particular polypeptide.
- Fc R Fc receptors for IgG
- Fc Rl CD64
- Fc RII CD32
- Fc Rill CD 16
- Bispecific antibodies may also be used to localize cytotoxic agents to cells which express a particular antigen identified in accordance with the present invention. These antibodies possess an antigen-binding arm and an arm which binds a cytotoxic agent or a radionuclide chelator, such as EOTUBE, DPTA, DOTA, or TETA. Another bispecific antibody of interest binds the target polypeptide and further binds tissue factor (TF).
- TF tissue factor
- heteroconjugate antibodies are composed of two covalently joined antibodies. Such antibodies have, for example, been proposed to target immune system cells to unwanted cells (U.S. Patent No. 4,676,980), and for treatment of HIV infection (WO 91/00360; WO 92/200373; EP 03089). It is contemplated that the antibodies may be prepared in vitro using known methods in synthetic protein chemistry, including those involving crosslinking agents. For example, immunotoxins may be constructed using a disulfide exchange reaction or by forming a thioether bond. Examples of suitable reagents for this purpose include iminothiolate and methyl-4-mercaptobutyrimidate and those disclosed, for example, in U.S. Patent No.4,676,980.
- cysteine residue(s) may be introduced into the Fc region, thereby allowing interchain disulfide bond formation in this region.
- the homodimeric antibody thus generated may have improved internalization capability and/or increased complement-mediated cell killing and antibody- dependent cellular cytotoxicity (ADCC). See Caro ⁇ et al., J. Exp Med., 176: 1191-1195 (1992) and Shopes, J. Immunol., 148: 2918-2922 (1992).
- Homodimeric antibodies with enhanced anti-tumor activity may also be prepared using heterobifu ⁇ ctional cross-linkers as described in Wolff et al. Cancer Research, 53: 2560-2565 (1993).
- an antibody can be engineered that has dual Fc regions and may thereby have enhanced complement lysis and ADCC capabilities. See Stevenson etal., Anti-Cancer Drug Design 3: 219-230 (1989). Immunoconjugates
- the invention also includes the use of immunoconjugates comprising an antibody conjugated to a cytotoxic agent such as a chemotherapeutic agent, toxin (e.g., an enzymatically active toxin of bacterial, fungal, plant, or animal origin, or fragments thereof), or a radioactive isotope (i.e., a radioconjugate).
- a cytotoxic agent such as a chemotherapeutic agent, toxin (e.g., an enzymatically active toxin of bacterial, fungal, plant, or animal origin, or fragments thereof), or a radioactive isotope (i.e., a radioconjugate).
- Enzymatically active toxins and fragments thereof that can be used include diphtheria A chain, nonbinding active fragments of diphtheria toxin, exotoxin A chain (from Pseudomonas aeruginosa), ricin A chain, abrin A chain, modeccin A chain, alpha-sarcin, Aleurites fordii proteins, dianthin proteins, Phytolaca americana proteins (PAPI, PAPII, and PAP-S), momordica charantia inhibitor, curcin, crotin, sapaonaria officinalis inhibitor, gelonin, mitogellin, restrictocin, phenomycin, enomycin, and the tricothecenes.
- a variety of radionuclides are available for the production of radioconjugated antibodies. Examples include 212 Bi, 131 l, 131 In, 90 Y, and 186 Re.
- Conjugates of the antibody and cytotoxic agent are made using a variety of bifunctional protein-coupling agents such as N-succinimidyl-3-(2-pyridyldithiol) propionate (SPDP), iminothiolane (IT), bifunctional derivatives of imidoesters (such as dimethyl adipimidate HCL), active esters (such as disuccinimidyl suberate), aldehydes (such as glutareldehyde), bis-azido compounds (such as bis (p-azidobenzoyl) hexanediamine), bis-diazonium derivatives (such as bis-(p-diazoniumbenzoyl)-ethylenediamine), diisocyanates (such as tolyene 2,6-diisocyanate), and bis-active fluorine compounds (such as 1,5-difluoro-2,4-dinitrobenzene).
- SPDP N-succinimidyl-3-(
- a ricin immunotoxin can be prepared as described in Vitetta et al., Science, 238: 1098 (1987).
- Carbon- 14-labeled 1-isothiocyanatobenzyl-3-methyldiethylene triaminepentaacetic acid (MX-DTPA) is an exemplary chelating agent for conjugation of radionucleotide to the antibody. See W094/11026.
- the antibody may be conjugated to a "receptor” (such streptavidin) for utilization in tumor pretargeting wherein the antibody-receptor conjugate is administered to the patient, followed by removal of unbound conjugate from the circulation using a clearing agent and then administration of a "ligand” (e.g., avidin) that is conjugated to a cytotoxic agent (e.g., a radionucleotide).
- a "receptor” such streptavidin
- a ligand e.g., avidin
- cytotoxic agent e.g., a radionucleotide
- Preferred immunoconjugates are antibody-maytansinoid conjugates.
- Immunoconjugates containing maytansinoids and their therapeutic use are disclosed, for example, in U.S. patent Nos. 5,208,020; 5,416,064; and European Patent EP 0 425 235 B1, the disclosures of which are hereby expressly incorporated by reference.
- Liu etal., Proc Natl Acad Sci USA 93:8618-8623 (1996) described immunoconjugates comprising a maytansinoid designated DM1 linked to the monoclonal antibody C242 directed against human colorectal cancer.
- the conjugate was found to be highly cytotoxic towards cultured colon cancer cells, and showed antitumor activity in an in vivo tumor growth assay.
- Maytansinoids are well known in the art and can be synthesized by known techniques or isolated from natural sources. Suitable maytansinoids are disclosed, for example, in U.S.
- Preferred maytansinoids are maytansinol and maytansinol analogues modified in the aromatic ring or at other positions of the maytansinol molecule, such as various maytansinol esters.
- Another immunoconjugate of particular interest comprises an antibody conjugated to one or more celicheamicin molecules.
- the alicheamicin family of antibiotics are capable of producing double-stranded DNA breaks at sub-picomolar concentrations.
- Structural analogues of calicheamicin which may be used include, but are not limited to, ⁇ *
- Another preferred anti-tumor drug that the antibody can be conjugated to is QFA, an antifolate.
- QFA an antifolate.
- calicheamicin and QFA have intracellular sites of action and do not readily cross the plasma membrane. Therefore, cellular uptake of these agents through antibody mediated internalization greatly enhances their cytotoxic effects.
- the upregulation of the target polypeptides in accordance with the present invention lowers the effective dose of the immunoconjugates and thus eliminates or reduces the toxicity problems often associated with the administration of cytotoxic agents or immunconjugates containing cytotoxic agents.
- the antibodies used in the treatment methods of the present invention may also be formulated as immunoliposomes.
- Liposomes containing the antibody are prepared by methods known in the art, such as described in
- Patent No. 5,013,556 is a patent No.
- Particularly useful liposomes can be generated by the reverse-phase evaporation method with a lipid composition comprising phosphatidylcholine, cholesterol, and PEG-derivatized phosphatidylethanolamine (PEG-PE).
- a lipid composition comprising phosphatidylcholine, cholesterol, and PEG-derivatized phosphatidylethanolamine (PEG-PE).
- Liposomes are extruded through filters of defined pore size to yield liposomes with the desired diameter.
- Fab' fragments of the antibody of the present invention can be conjugated to the liposomes as described in Martin etal., J. Biol. Chem., 257: 286-288 (1982) via a disulfide-interchange reaction.
- a chemotherapeutic agent (such as Doxorubicin) is optionally contained within the liposome. See Gabizon et al., J. National Cancer Inst, 81 (19): 1484 (1989).
- ADPT Antibody-Dependent Enzyme Mediated Prodrug Therapy
- the antibodies herein may also be used in ADEPT by conjugating the antibody to a prodrug-activating enzyme which converts a prodrug (e.g., a peptidyl chemotherapeutic agent, see WO 81/01145) to an active anti-cancer drug.
- a prodrug e.g., a peptidyl chemotherapeutic agent, see WO 81/01145
- an active anti-cancer drug See, for example, WO 88/07378 and U. S. Patent No. 4,975,278.
- the enzyme component of the immunoconjugate useful for ADEPT includes any enzyme capable of acting on a prodrug in such as way so as to convert it into its more active, cytotoxic form.
- Enzymes that are useful in the method of this invention include, but are not limited to, glycosidase, glucose oxidase, human lysosyme, human glucuronidase, alkaline phosphatase useful for converting phosphate-containing prodrugs into free drugs; arylsulfatase useful for converting sulfate-containing prodrugs into free drugs; cytosine deaminase useful for converting non-toxic 5-fluorocytosine into the anti-cancer drug 5-fluorouracil; proteases, such as serratia protease, thermol ⁇ sin, subtilisin, carbox ⁇ peptidases (e.g., carboxypeptidase G2 and carboxypeptidase A) and cathepsins (such as cathepsins B and L), that are useful for converting peptide-containing prodrugs into free drugs; D- alanylcarboxypeptidases, useful for converting prodrugs that contain D-a
- antibodies with enzymatic activity can be used to convert the prodrugs of the invention into free active drugs (see, e.g., Massey, Nature, 328:457-458 (1987)).
- Antibody-abzyme conjugates can be prepared as described herein for delivery of the abzyme to a tumor cell population.
- the enzymes can be covalently bound to the antibodies by techniques well known in the art such as the use of the heterobifunctional cross-linking agents discussed above.
- fusion proteins comprising at least the antigen binding region of the antibody of the invention linked to at least a functionally active portion of an enzyme of the invention can be constructed using recombinant DNA techniques well known in the art (see, e.g., Neuberger et al., Nature, 312:604-608 (1984)).
- the antibodies specifically binding the tumor antigens identified in accordance with the present invention, as well as other molecules targeting such tumor antigens, can be administered for the treatment of various disorders in the form of pharmaceutical compositions.
- the target polypeptide tumor antigen
- intracellular and whole antibodies are used as inhibitors, internalizing antibodies are preferred.
- lipofections or liposomes can also be used to deliver the antibody, or an antibody fragment, into cells. Where antibody fragments are used, the smallest inhibitory fragment that specifically binds to the binding domain of the target protein is preferred.
- peptide molecules can be designed that retain the ability to bind the target protein sequence.
- Such peptides can be synthesized chemically and/or produced by recombinant DNA technology. See, e.g., Marasco et al., Proc. Natl. Acad. Sci. USA, 90: 7889-7893 (1993).
- the formulation herein may also contain more than one active compound as necessary for the particular indication being treated, preferably those with complementary activities that do not adversely affect each other.
- the composition may comprise an agent that enhances its function, such as, for example, a cytotoxic agent, cytokine, chemotherapeutic agent, or growth-inhibitory agent.
- Such molecules are suitably present in combination in amounts that are effective for the purpose intended.
- the active ingredients may also be entrapped in microcapsules prepared, for example, by coacervation techniques or by interfacial polymerization, for example, hydroxymethylcellulose or gelatin-microcapsules and poly- (methylmethacylate) microcapsules, respectively, in colloidal drug delivery systems (for example, liposomes, albumin microspheres, microemulsions, nano-particles, and nanocapsules) or in macroemulsions.
- colloidal drug delivery systems for example, liposomes, albumin microspheres, microemulsions, nano-particles, and nanocapsules
- the formulations to be used for in vivo administration must be sterile. This is readily accomplished by filtration through sterile filtration membranes.
- Sustained-release preparations may be prepared. Suitable examples of sustained-release preparations include semipermeable matrices of solid hydrophobic polymers containing the antibody, which matrices are in the form of shaped articles, e.g., films, or microcapsules. Examples of sustained-release matrices include polyesters, hydrogels (for example, poly(2-hydroxyethyl-methacrylate), or poly(vinylalcohol)), polylactides (U.S. Pat. No.
- copolymers of L-glutamic acid and ethyl-L-glutamate non-degradable ethylene-vinyl acetate
- degradable lactic acid-glycolic acid copolymers such as the LUPRON DEPOT TM (injectable microspheres composed of lactic acid-glycolic acid copolymer and leuprolide acetate)
- poly-D-(-)-3-hydroxybutyric acid While polymers such as ethylene-vinyl acetate and lactic acid-glycolic acid enable release of molecules for over 100 days, certain hydrogels release proteins for shorter time periods.
- encapsulated antibodies When encapsulated antibodies remain in the body for a long time, they may denature or aggregate as a result of exposure to moisture at 37°C, resulting in a loss of biological activity and possible changes in immunogenicity. Rational strategies can be devised for stabilization depending on the mechanism involved. For example, if the aggregation mechanism is discovered to be intermolecular S-S bond formation through thio-disulfide interchange, stabilization may be achieved by modifying sulfhydryl residues, lyophilizing from acidic solutions, controlling moisture content, using appropriate additives, and developing specific polymer matrix compositions. 4.
- the antibodies and other anti-tumor compounds of the present invention may be used to treat various conditions, including those characterized by overexpression and/or activation of the tumor antigens identified herein.
- Exemplary conditions or disorders to be treated with such antibodies and other compounds include benign or malignant tumors (e.g., renal, liver, kidney, bladder, breast, gastric, ovarian, colorectal, prostate, pancreatic, lung, vulval, thyroid, hepatic carcinomas; sarcomas; glioblastomas; and various head and neck tumors); leukemias and lymphoid malignancies; other disorders such as neuronal, glial, astrocytal, hypothalamic and other glandular, macrophagal, epithelial, stromal and blastocoelic disorders; and inflammatory, angiogenic and immunologic disorders.
- benign or malignant tumors e.g., renal, liver, kidney, bladder, breast, gastric, ovarian, colorectal, prostate, pancreatic, lung
- Particularly preferred targets for treatment with antibodies and other antagonists of the present invention are tumors that harbor genetic defects in the Wnt-1 pathway (e.g. leading to abnormal activation of ⁇ -catenin signaling) and/or overexpress a tumor antigen identified herein.
- Wnt-1 pathway e.g. leading to abnormal activation of ⁇ -catenin signaling
- a tumor antigen identified herein e.g., a tumor antigen identified herein.
- human cancers harboring genetic defects in the Wnt-1 pathway typically also exhibit overexpression of the tumor antigen Stra ⁇ , but not all Stra ⁇ overexpressing tumors have been known to be associated with mutations in the Wnt-1 pathway.
- the antagonists of the present invention have great potential in the treatment of tumors characterized by aberrant Wnt signaling, especially when the target antigen is characterized by synergistic enhancement of its expression by a combination of Wnt-1 and retinoid treatment.
- a preferred group of such tumors includes colorectal tumors, ovary, endometrium, and Wilm's kidney tumor, breast cancer, prostate cancer, gastric cancer, lung cancer, hepatocellular cancer, melanoma, and pheochromocytome (a tumor derived from the adrenal medulla).
- the anti-tumor agents of the present invention are administered to a mammal, preferably a human, in combination with a retinoid, e.g., retinoic acid, in accord with known methods, such as intravenous administration as a bolus or by continuous infusion over a period of time, by intramuscular, intraperitoneal, i ⁇ tracerobrospi ⁇ al, subcutaneous, intra-articular, intrasynovial, intrathecal, oral, topical, or inhalation routes. Intravenous administration of the antibody is preferred.
- Retinoids can be administered by the same of different routes of administration. In Example 15 all-t ⁇ /w-retinoi aid (ATRA) has been shown to be effective when administered orally.
- the retinoids may also be administered by peri-tumoral injection.
- Retinoid treatment may precede or follow the treatment with the anti-tumor agent, e.g., antibody, or may occur simultaneously. Since the primary goal of the retinoid treatment is to upregulate the target antigen in order to enhance the efficacy of tumor therapy, the retinoid is preferably administered prior to or simultaneously with treatment with an anti-tumor agent. In the case of concurrent treatment, the anti-tumor agent and the retinoid may be formulated separately, or may be included in the same pharmaceutical composition.
- the anti-tumor agent e.g., antibody
- the effective amount of a retinoid can be determined by routine testing, and typically is between about 15 mg/kg and about 400 mg/kg, preferably between about 20 kg/kg and about 200 mg/kg, more preferably between about 25 mg/kg and about 150 mg/kg of body weight.
- the treatment may involve the administration of a Wnt, e.g. Wnt-1, since the coadministration of a retinoid and Wnt, e.g. Wnt-1 may synergistically induce the genes identified herein.
- Coadministration includes simultaneous administration, or consecutive administration of the two agents in either order.
- cancer treatment involves one or a combination of the following therapies: surgery to remove the cancerous tissue, radiation therapy, and chemotherapy.
- the treatment methods of the present invention improve the therapeutic index of anti-tumor agents, such as antibodies, and thereby allow the reduction of the effective dose to be administered. Accordingly, the therapeutic methods herein are especially useful in the treatment of elderly patients and others who do not tolerate well the toxicity and side effects of chemotherapy and in metastatic disease where radiation therapy has limited usefulness.
- chemotherapeutic agents may be administered to the patient. Preparation and dosing schedules for such chemotherapeutic agents may be used according to manufacturers' instructions or as determined empirically by the skilled practitioner. Preparation and dosing schedules for such chemotherapy are also described in Chemotherapy Service Ed., M.C. Perry, Williams & Wilkins, Baltimore, MD (1992).
- the chemotherapeutic agent may precede, or follow administration of the anti-tumor agent, e.g., antibody, or may be given simultaneously therewith.
- the antibody may be combined with an anti-estrogen compound such as tamoxifen or an anti-progesterone such as onapristone (see, EP 616812) in dosages known for such molecules.
- the antibodies herein are co-administered with a growth inhibitory agent.
- the growth inhibitory agent may be administered first, followed by an antibody of the present invention.
- simultaneous administration or administration of the antibody of the present invention first is also contemplated. Suitable dosages for the growth inhibitory agent are those presently used and may be lowered due to the combined action (synergy) of the growth inhibitory agent and the antibody herein.
- an anti-tumor agent e.g., an antibody herein
- the appropriate dosage of an anti-tumor agent will depend on the type of disease to be treated, as defined above, the severity and course of the disease, whether the agent is administered for preventive or therapeutic purposes, previous therapy, the patient's clinical history and response to the agent, and the discretion of the attending physician.
- the agent is suitably administered to the patient at one time or over a series of treatments.
- glka to 15 mg/kg (e.g., 0.1-20 mg/kg) of antibody is an initial candidate dosage for administration to the patient, whether, for example, by one or more separate administrations, or by continuous infusion.
- a typical daily dosage might range from about 1 glka. to 100 mg/kg or more, depending on the factors mentioned above.
- the treatment is sustained until a desired suppression of disease symptoms occurs.
- other dosage regimens may be useful. The progress of this therapy is easily monitored by conventional techniques and assays.
- an article of manufacture containing the antibodies or other antagonist herein, in combination with a retinoid comprises a container and a label.
- suitable containers include, for example, bottles, vials, syringes, and test tubes.
- the containers may be formed from a variety of materials such as glass or plastic.
- the container holds a composition which is effective for treating a condition targeted and may have a sterile access port (for example the container may be an intravenous solution bag or a vial having a stopper pierceable by a hypodermic injection needle).
- the active agent in the composition is usually an anti-tumor agent capable of interfering with the activity of a gene product identified herein, e.g., an antibody.
- the label on, or associated with, the container indicates that the composition is used for diagnosing or treating the condition of choice.
- the article of manufacture will further comprise, within the same or a separate container, a retinoid and optionally a pharmaceutically-acceptable buffer, such as phosphate-buffered saline. Ringer's solution and dextrose solution. It may further include other materials desirable from a commercial and user standpoint, including other buffers, diluents, filters, needles, syringes, and package inserts with instructions for use.
- antibodies directed against the protein products of genes amplified in tumor cells can be used as tumor diagnostics or prognostics.
- antibodies, including antibody fragments can be used to qualitatively or quantitatively detect the expression of proteins encoded by the amplified genes ("marker gene products").
- the antibody preferably is equipped with a detectable, e.g., fluorescent label, and binding can be monitored by light microscopy, flow cytometry, fluorimetry, or other techniques known in the art. These techniques are particularly suitable, if the amplified gene encodes a cell surface protein, e.g., a growth factor.
- binding assays are performed essentially as described hereinabove.
- the diagnostic assays of the present invention take advantage of the finding that retinoids, e.g. retinoic acid, selectively upregulate the tumor antigens identified herein. Accordingly, the diagnostic assays are performed in conjunction with retinoid treatment, where the retinoid treatment may precede, occur concurrently with, or follow the administration of the diagnostic agent targeting a tumor antigen, such as a corresponding antibody.
- retinoid treatment may precede, occur concurrently with, or follow the administration of the diagnostic agent targeting a tumor antigen, such as a corresponding antibody.
- This selective upregulation of the tumor antigen by retinoid treatment greatly improves the sensitivity of the diagnostic assay, and may allow the detection of tumor antigens which would otherwise not be detectable. This, in turn, allows early detection of the tumor, and early intervention using the most appropriate treatment, including targeting the tumor antigen identified.
- In situ detection of antibody binding to the marker gene products can be performed, for example, by immunofluorescence or immunoelectron microscopy.
- a histological specimen is removed from the patient, and a labeled antibody is applied to it, preferably by overlaying the antibody on a biological sample.
- This procedure also allows for determining the distribution of the marker gene product in the tissue examined. It will be apparent for those skilled in the art that a wide variety of histological methods are readily available for in situ detection.
- EXAMPLE 1 Isolation of cDNA Clones Encoding a Human PR010282 and PR019578 polypeptides cDNA clones (DNA148380-2827 and DNA148389-2827-1) encoding native human PR010282 and PR019578 polypeptides were identified using a yeast screen, in a human fetal brain cDNA library that preferentially represents the 5' ends of the primary cDNA clones.
- Clone DNA148380-2827 contains a single open reading frame with an apparent franslational initiation site at nucleotide positions 49-51 and ending at the stop codon at nucleotide positions 2050-2052 (Figure 1).
- the predicted polypeptide precursor is 667 amino acids long ( Figure 2).
- the full-length PR010282 protein shown in Figure 2 has an estimated molecular weight of about 73502 daltons and a pi of about 9.26.
- SEQ ID N0:2 Analysis of the full-length PR010282 sequence shown in Figure 2 (SEQ ID N0:2) evidences the presence of a variety of important polypeptide domains as shown in Figure 2, wherein the locations given for those important polypeptide domains are approximate as described above.
- Clone DNA148380-2827 has been deposited with ATCC on January 11, 2000 and is assigned ATCC Deposit No. PTA-1181.
- Clone DNA148389-2827-1 contains a single open reading frame with an apparent translational initiation site at nucleotide positions 186-188 and ending at the stop codon at nucleotide positions 2160-2162 ( Figure 6, SEQ ID NO: 4).
- the predicted polypeptide precursor is 658 amino acids long ( Figure 7, SEQ ID NO: 5).
- the full-length PR019578 protein shown in Figure 7 has an estimated molecular weight of about 72583 daltons and a pi of about 9.36.
- Analysis of the full-length PR019578 sequence shown in Figure 7 evidences the presence of a variety of important polypeptide domains as shown in Figure 7, wherein the locations given for those important polypeptide domains are approximate as described above. Noteworthy is the presence of nine potential transmembrane domains and fourteen cysteine residues conserved between the human and the corresponding mouse sequence. While mouse
- PR019578 contains a deletion of nine amino acids (SPVDFLAGD; SEQ ID NO: 13) at positions 89-97 of the PR010282 amino acid sequence.
- PR019578 contains an isoleucine (I) at amino acid position 518 in place of methionine (M) at the corresponding position (position 527) of PR010282, which results from a G/A polymorphism at this position.
- Both the PR010282 and the native sequence PR019578 polypeptides are believed to be the human homologues of the mouse Stra ⁇ polypeptide, and are, therefore, also referred to as "Stra ⁇ .”
- Mouse Stra ⁇ and the native sequence human full-length PR010282 polypeptide encoded by DNA148340-2827 show about 74% amino acid sequence identity.
- Figure 9 shows the hydrophobicity plot of the native sequence human full-length PRO10282 polypeptide encoded by DNA148380-2827, briefly referred to as "human Stra ⁇ .” As shown in Figure 9, about 50% of the amino acid residues in this 667 amino acids long polypeptide are hydrophobic.
- the human Stra6 gene was localized to chromosome 15q23 as determined by UNIGENE. Preliminary fine mapping indicates that Stra ⁇ is located in the STS interval D15S124-D15S160 and the GeneMap'98 position corresponds to 244.52 on the G3 map.
- EXAMPLE 2 Use of PR010282 and PR019578 as a hybridization probe The following method describes use of a nucleotide sequence encoding PR010282 and PR019578 as a hybridization probe.
- DNA comprising the coding sequence of full-length or mature PR010282 or PR019578 is employed as a probe to screen for homologous DNAs (such as those encoding naturally-occurring variants of PR010282 or PR019578) in human tissue cDNA libraries or human tissue genomic libraries.
- Hybridization and washing of filters containing either library DNAs is performed under the following high stringency conditions.
- Hybridization of radiolabeled PR010282-der ⁇ ved probe to the filters is performed in a solution of 50% formamide, 5x SSC, 0.1 % SDS, 0.1 % sodium pyrophosphate, 50 mM sodium phosphate, pH 6.8, 2x Denhardfs solution, and 10% dextran sulfate at 42°C for 20 hours. Washing of the filters is performed in an aqueous solution of
- DNAs having a desired sequence identity with the DNA encoding full-length native sequence PR010282 or PR019578 can then be identified using standard techniques known in the art.
- EXAMPLE 3 Expression of PR010282 and PR019578 in £ coli
- This example illustrates preparation of an unglycosylated form of PR010282 or PR019578 by recombinant expression in £ coli.
- the DNA sequence encoding PR010282 or PR019578 is initially amplified using selected PCR primers.
- the primers should contain restriction enzyme sites which correspond to the restriction enzyme sites on the selected expression vector.
- a variety of expression vectors may be employed.
- An example of a suitable vector is pBR322 (derived from £ coli; see Bolivar et al., Gene, 2:95 (1977)) which contains genes for ampicillin and tetracycline resistance.
- the vector is digested with restriction enzyme and dephosphorylated.
- the PCR amplified sequences are then ligated into the vector.
- the vector will preferably include sequences which encode for an antibiotic resistance gene, a trp promoter, a polyhis leader (including the first six STII codons, polyhis sequence, and enterokinase cleavage site), the PR010282 or PR019578 coding region, lambda transcriptional terminator, and an argU gene.
- the ligation mixture is then used to transform a selected £ coli strain using the methods described in Sambrook et al., supra. Transformants are identified by their ability to grow on LB plates and antibiotic resistant colonies are then selected. Plasmid DNA can be isolated and confirmed by restriction analysis and DNA sequencing.
- Selected clones can be grown overnight in liquid culture medium such as LB broth supplemented with antibiotics.
- the overnight culture may subsequently be used to inoculate a larger scale culture.
- the cells are then grown to a desired optical density, during which the expression promoter is turned on. After culturing the cells for several more hours, the cells can be harvested by centrifugation.
- the cell pellet obtained by the centrifugation can be solubilized using various agents known in the art, and the solubilized PR010282 protein can then be purified using a metal chelating column under conditions that allow tight binding of the protein.
- PR010282 or PR019578 may be expressed in £ coli in a poly-His tagged form, using the following procedure.
- the DNA encoding PR010282 or PR019578 is initially amplified using selected PCR primers.
- the primers will contain restriction enzyme sites which correspond to the restriction enzyme sites on the selected expression vector, and other useful sequences providing for efficient and reliable translation initiation, rapid purification on a metal chelation column, and proteolytic removal with enterokinase.
- PCR-amplified, poly-His tagged sequences are then ligated into an expression vector, which is used to transform an £ e ⁇ //host based on strain 52 (W3110 fuhA(tonA) Ion galE rpoHts(htpRts) clpP(laclq).
- Transformants are first grown in LB containing 50 mg/ml carbenicillin at 30°C with shaking until an 0.D.600 of 3-5 is reached.
- Cultures are then diluted 50-100 fold into CRAP media (prepared by mixing 3.57 g (NH 4 ) 2 S0 4 , 0.71 g sodium citrate 2H20, 1.07 g KCI, 5.36 g Difco yeast extract, 5.36 g Sheffield hycase SF in 500 mL water, as well as 110 mM MPOS, pH 7.3, 0.55% (w/v) glucose and 7 mM MgS0 4 ) and grown for approximately 20-30 hours at 30°C with shaking. Samples are removed to verify expression by SDS-PAGE analysis, and the bulk culture is centrifuged to pellet the cells. Cell pellets are frozen until purification and refolding.
- CRAP media prepared by mixing 3.57 g (NH 4 ) 2 S0 4 , 0.71 g sodium citrate 2H20, 1.07 g KCI, 5.36 g Difco yeast extract, 5.36 g Sheffield hycase SF in 500 mL water, as well as 110 mM MPOS, pH
- £ coli paste from 0.5 to 1 L fermentations (6-10 g pellets) is resuspended in 10 volumes (w/v) in 7 M guanidine, 20 mM Tris, pH 8 buffer.
- Solid sodium sulfite and sodium tetrathionate is added to make final concentrations of 0.1 M and 0.02 M, respectively, and the solution is stirred overnight at 4°C. This step results in a denatured protein with all cysteine residues blocked by sulfitolization.
- the solution is centrifuged at 40,000 rpm in a Beckman Ultracentrifuge for 30 min.
- the supernatant is diluted with 3-5 volumes of metal chelate column buffer (6 M guanidine, 20 mM Tris, pH 7.4) and filtered through 0.22 micron filters to clarify.
- the clarified extract is loaded onto a 5 ml Qiagen Ni-NTA metal chelate column equilibrated in the metal chelate column buffer.
- the column is washed with additional buffer containing 50 mM imidazole (Calbiochem, Utrol grade), pH 7.4.
- the protein is eluted with buffer containing 250 mM imidazole. Fractions containing the desired protein are pooled and stored at 4°C. Protein concentration is estimated by its absorbance at 280 nm using the calculated extinction coefficient based on its amino acid sequence.
- the proteins are refolded by diluting the sample slowly into freshly prepared refolding buffer consisting of: 20 M Tris, pH 8.6, 0.3 M NaCI, 2.5 M urea, 5 mM cysteine, 20 mM glycine and 1 mM EDTA. Refolding volumes are chosen so that the final protein concentration is between 50 to 100 micrograms/ml.
- the refolding solution is stirred gently at 4°C for 12-36 hours.
- the refolding reaction is quenched by the addition of TFA to a final concentration of
- the solution is filtered through a 0.22 micron filter and acetonitrile is added to 2-10% final concentration.
- the refolded protein is chromatographed on a Poros R1/H reversed phase column using a mobile buffer of 0.1 % TFA with elution with a gradient of acetonitrile from 10 to 80%.
- Fractions containing the desired folded PR010282 or PR019578 polypeptide are pooled and the acetonitrile removed using a gentle stream of nitrogen directed at the solution. Proteins are formulated into 20 mM Hepes, pH 6.8 with 0.14 M sodium chloride and 4% mannitol by dialysis or by gel filtration using G25 Superfine (Pharmacia) resins equilibrated in the formulation buffer and sterile filtered.
- the two Stra ⁇ ECD coding sequence DNA fragments were prepared by PCR from a full length cDNA clone, and inserted into the expression vector described above, which was designated as pST239.
- the new Stra ⁇ expression plasmids designated PE148380A and PE148380B, were transformed into the £ coli strain 58F3 ((fhuA ⁇ (to ⁇ A ⁇ ) lon ⁇ galE rpoHts (htpRts) ⁇ cIpP laclq ⁇ ompT ⁇ (nmpc-fepE) ⁇ slyD).
- Luria Broth cultures of these transformants were first grown overnight at 30 °C, and then diluted 100 fold into a phosphate limiting media to induce the alkaline phosphatase promoter. After 24 hours at 30 °C with shaking, the cultures were centrifuged, and the cell pastes frozen until the start of peptide purification.
- the PRO10282 or PR019578 DNA is ligated into pRK5 with selected restriction enzymes to allow insertion of the PR010282 DNA using ligation methods such as described in Sambrook et al., supra.
- the resulting vector is called pRK5-PR010282 and pRK5-PR019578, respectively.
- the selected host cells may be 293 cells.
- Human 293 cells (ATCC CCL 1573) are grown to confluence in tissue culture plates in medium such as DMEM supplemented with fetal calf serum and optionally, nutrient components and/or antibiotics.
- About 10 g pRK5-PR010282 or pRK5-PR019578 DNA is mixed with about 1 g DNA encoding the VA RNA gene [Thimmappaya et al., CeJI, 3J.:543 (1982)] and dissolved in 500 I of 1 mM Tris- HCI, 0.1 mM EDTA, 0.227 M CaCI 2 .
- the culture medium is removed and replaced with culture medium (alone) or culture medium containing 200 Ci/ml 35 S-cysteine and 200 Ci/ml 3 S-methionine.
- culture medium alone
- culture medium containing 200 Ci/ml 35 S-cysteine and 200 Ci/ml 3 S-methionine After a 12 hour incubation, the conditioned medium is collected, concentrated on a spin filter, and loaded onto a 15% SDS gel. The processed gel may be dried and exposed to film for a selected period of time to reveal the presence of PR010282 polypeptide.
- the cultures containing transfected cells may undergo further incubation (in serum free medium) and the medium is tested in selected bioassays.
- PR010282 or PR019578 may be introduced into 293 cells transiently using the dextran sulfate method described by So paryrac et al., Proc. Natl. Acad. Sci., 12:7575 (1981). 293 cells are grown to maximal density in a spinner flask and 700 g pRK5-PR010282 or pRK5-PR019578 DNA is added. The cells are first concentrated from the spinner flask by centrifugation and washed with PBS. The DNA-dextran precipitate is incubated on the cell pellet for four hours.
- the cells are treated with 20% glycerol for 90 seconds, washed with tissue culture medium, and re-introduced into the spinner flask containing tissue culture medium, 5 g/ml bovine insulin and 0.1 g/ml bovine transferrin. After about four days, the conditioned media is centrifuged and filtered to remove cells and debris. The sample containing expressed PR010282 or PR019578 can then be concentrated and purified by any selected method, such as dialysis and/or column chromatography.
- PR010282 or PR019578 can be expressed in CHO cells.
- the pRK5-PR010282 or pRK5-PR019578 can be transfected into CHO cells using known reagents such as CaP0 4 or DEAE-dextran.
- the cell cultures can be incubated, and the medium replaced with culture medium (alone) or medium containing a radiolabel such as 35 S-methionine.
- the culture medium may be replaced with serum free medium.
- the cultures are incubated for about 6 days, and then the conditioned medium is harvested.
- the medium containing the expressed PR010282 or PR019578 can then be concentrated and purified by any selected method.
- Epitope-tagged PR010282 or pR019578 may also be expressed in host CHO cells.
- PR019578 may be subcloned out of the pRK5 vector.
- the subclone insert can undergo PCR to fuse in frame with a selected epitope tag such as a poly-his tag into a Baculovirus expression vector.
- the poly-his tagged PR010282 or PRO 19578 insert can then be subcloned into a SV40 driven vector containing a selection marker such as DHFR for selection of stable clones.
- the CHO cells can be transfected (as described above) with the SV40 driven vector. Labeling may be performed, as described above, to verify expression.
- the culture medium containing the expressed poly-His tagged PR010282 or PR019578 can then be concentrated and purified by any selected method, such as by Ni + -chelate affinity chromatography.
- PR010282 or PR019578 may also be expressed in CHO and/or COS cells by a transient expression procedure or in CHO cells by another stable expression procedure. Stable expression in CHO cells is performed using the following procedure. The proteins are expressed as an
- IgG construct immunoadhesin
- soluble forms e.g. extracellular domains
- IgG 1 constant region sequence containing the hinge, CH2 and CH2 domains and/or is a poly-His tagged form.
- CHO expression vectors are constructed to have compatible restriction sites 5' and 3' of the DNA of interest to allow the convenient shuttling of cDNA's.
- the vector used expression in CHO cells is as described in Lucas et al., Nucl. Acids Res. 24:9 (1774-1779 (1996), and uses the SV40 early promoter/enhancer to drive expression of the cDNA of interest and dihydrofolate reductase (DHFR).
- DHFR expression permits selection for stable maintenance of the plasmid following transfection.
- Twelve micrograms of the desired plasmid DNA is introduced into approximately 10 million CHO cells using commercially available transfection reagents Superfect® (Quiagen), Dosper® or Fugene® (Boehringer Mannheim). The cells are grown as described in Lucas et al., supra. Approximately 3 x 10 '7 cells are frozen in an ampoule for further growth and production as described below. The ampoules containing the plasmid DNA are thawed by placement into water bath and mixed by vortexing.
- the contents are pipetted into a centrifuge tube containing 10 mLs of media and centrifuged at 1000 rpm for 5 minutes. The supernatant is aspirated and the cells are resuspended in 10 mL of selective media (0.2 ⁇ m filtered
- the cells are transferred into a 250 mL spinner filled with 150 mL selective growth medium and incubated at 37°C. After another 2-3 days, 250 mL, 500 mL and 2000 mL spinners are seeded with 3 x 10 5 cells/mL.
- the cell media is exchanged with fresh media by centrifugation and resuspension in production medium.
- any suitable CHO media may be employed, a production medium described in U.S. Patent No. 5,122,469, issued June 16, 1992 may actually be used.
- a 3L production spinner is seeded at 1.2 x 10 6 cells/mL. On day 0, the cell number pH is determined.
- the spinner On day 1, the spinner is sampled and sparging with filtered air is commenced. On day 2, the spinner is sampled, the temperature shifted to 33°C, and 30 L of 500 g/L glucose and 0.6 mL of 10% antifoam (e.g., 35% polydimethylsiloxane emulsion, Dow Corning 365 Medical Grade Emulsion) taken. Throughout the production, the pH is adjusted as necessary to keep it at around 7.2. After 10 days, or until the viability dropped below 70%, the cell culture is harvested by centrifugation and filtering through a 0.22 ⁇ m filter. The filtrate was either stored at 4°C or immediately loaded onto columns for purification.
- 10% antifoam e.g., 35% polydimethylsiloxane emulsion, Dow Corning 365 Medical Grade Emulsion
- the proteins are purified using a Ni-NTA column (Qiagen). Before purification, imidazole is added to the conditioned media to a concentration of 5 mM. The conditioned media is pumped onto a 6 ml Ni-NTA column equilibrated in 20 mM Hepes, pH 7.4, buffer containing 0.3 M NaCI and 5 mM imidazole at a flow rate of 4-5 ml/min. at 4°C. After loading, the column is washed with additional equilibration buffer and the protein eluted with equilibration buffer containing 0.25 M imidazole. The highly purified protein is subsequently desalted into a storage buffer containing 10 mM Hepes, 0.14 M NaCI and 4% mannitol, pH 6.8, with a 25 ml G25
- Immunoadhesin (Fc-containing) constructs are purified from the conditioned media as follows.
- the conditioned medium is pumped onto a 5 ml Protein A column (Pharmacia) which had been equilibrated in 20 mM Na phosphate buffer, pH 6.8. After loading, the column is washed extensively with equilibration buffer before elution with 100 mM citric acid, pH 3.5.
- the eluted protein is immediately neutralized by collecting 1 ml fractions into tubes containing 275 ⁇ L of 1 M Tris buffer, pH 9.
- the highly purified protein is subsequently desalted into storage buffer as described above for the poly-His tagged proteins. The homogeneity is assessed by SDS polyacrylamide gels and by N- terminal amino acid sequencing by Edman degradation.
- yeast expression vectors are constructed for intracellular production or secretion of PR010282 polypeptides from the ADH2/GAPDH promoter.
- DNA encoding a PR010282 polypeptide (including PR019578) and the promoter is inserted into suitable restriction enzyme sites in the selected plasmid to direct intracellular expression of
- DNA encoding PR010282 can be cloned into the selected plasmid, together with DNA encoding the ADH2/GAPDH promoter, a native PR010282 signal peptide or other mammalian signal peptide, or, for example, a yeast alpha-factor or invertase secretory signal/leader sequence, and linker sequences (if needed) for expression of PR010282.
- Yeast cells such as yeast strain AB110, can then be transformed with the expression plasmids described above and cultured in selected fermentation media.
- the transformed yeast supematants can be analyzed by precipitation with 10% trichloroacetic acid and separation by SDS-PAGE, followed by staining of the gels with Coomassie Blue stain.
- Recombinant PR010282 (including PR019578) can subsequently be isolated and purified by removing the yeast cells from the fermentation medium by centrifugation and then concentrating the medium using selected cartridge filters.
- the concentrate containing PR010282 (e.g. PR019578) may further be purified using selected column chromatography resins.
- PR010282 and PR019578 in Baculovirus-lnfected Insect Cells
- the following method describes recombinant expression of PR010282 and PR019578 in Baculovirus- infected insect cells.
- sequence coding for PR010282 or PR019578 is fused upstream of an epitope tag contained within a baculovirus expression vector.
- epitope tags include poly-his tags and immunoglobulin tags (like Fc regions of IgG).
- plasmids may be employed, including plasmids derived from commercially available plasmids such as pVL1393 (Novagen). Briefly, the sequence encoding PR010282 or PR019578 or the desired portion of the coding sequence of PR010282 or PR019578, such as the sequence encoding the extracellular domain of a transmembrane protein or the sequence encoding the mature protein if the protein is extracellular, is amplified by PCR with primers complementary to the 5' and 3' regions. The 5' primer may incorporate flanking (selected) restriction enzyme sites.
- the product is then digested with those selected restriction enzymes and subcloned into the expression vector.
- Recombinant baculovirus is generated by co-transfecting the above plasmid and BaculoGoldTM virus DNA (Pharmingen) into Spodoptera frugiperda (“Sf9”) cells (ATCC CRL 1711) using lipofectin (commercially available from GIBCO-BRL). After 4 - 5 days of incubation at 28°C, the released viruses are harvested and used for further amplifications. Viral infection and protein expression are performed as described by O'Reilley et al., Baculovirus expression vectors: A Laboratory Manual, Oxford: Oxford University Press (1994).
- Expressed poly-his tagged PR010282 or PR019578 can then be purified, for example, by Ni 2+ -chelate affinity chromatography as follows. Extracts are prepared from recombinant virus-infected Sf9 cells as described by Rupert et al., Nature, 362:175-179 (1993). Briefly, Sf9 cells are washed, resuspended in sonication buffer (25 mL Hepes, pH 7.9; 12.5 mM MgCI 2 ; 0.1 mM EDTA; 10% glycerol; 0.1 % NP-40; 0.4 M KCI), and sonicated twice for 20 seconds on ice. The sonicates are cleared by centrifugation, and the supernatant is diluted 50-fold in loading buffer
- sonication buffer 25 mL Hepes, pH 7.9; 12.5 mM MgCI 2 ; 0.1 mM EDTA; 10% glycerol; 0.1 % NP
- a Ni 2+ -NTA agarose column (commercially available from Qiagen) is prepared with a bed volume of 5 mL, washed with 25 mL of water and equilibrated with 25 mL of loading buffer. The filtered cell extract is loaded onto the column at 0.5 mL per minute. The column is washed to baseline A 2B0 with loading buffer, at which point fraction collection is started. Next, the column is washed with a secondary wash buffer (50 M phosphate; 300 mM NaCI, 10% glycerol, pH 6.0), which elutes nonspecifically bound protein.
- a secondary wash buffer 50 M phosphate; 300 mM NaCI, 10% glycerol, pH 6.0
- the column is developed with a 0 to 500 mM Imidazole gradient in the secondary wash buffer.
- One mL fractions are collected and analyzed by SDS-PAGE and silver staining or Western blot with Ni 2+ -NTA-conjugated to alkaline phosphatase (Qiagen). Fractions containing the eluted His 10 -tagged PR010282 or PR019578 are pooled and dialyzed against loading buffer.
- purification of the IgG tagged (or Fc tagged) PR010282 or PR019578 can be performed using known chromatography techniques, including for instance, Protein A or protein G column chromatography.
- This example illustrates preparation of monoclonal antibodies which can specifically bind PR010282 or PR019578.
- Immunogens that may be employed include purified PR010282 and PR019578, fusion proteins containing PR010282 or PR019578, and cells expressing recombinant PR010282 or PR019578 on the cell surface.
- mice such as Balb/c are immunized with the PR010282 or PR019578 immunogen emulsified in complete Freund's adjuvant and injected subcutaneously or intraperitoneally in an amount from 1-100 micrograms.
- the immunogen is emulsified in MPL-TDM adjuvant (Ribi Immunochemical Research, Hamilton, MT) and injected into the animal's hind foot pads.
- MPL-TDM adjuvant Ribi Immunochemical Research, Hamilton, MT
- the immunized mice are then boosted 10 to 12 days later with additional immunogen emulsified in the selected adjuvant. Thereafter, for several weeks, the mice may also be boosted with additional immunization injections. Serum samples may be periodically obtained from the mice by retro-orbital bleeding for testing in ELISA assays to detect anti-PR010282 antibodies or anti-PR019578 antibodies.
- the animals "positive" for antibodies can be injected with a final intravenous injection of PR010282 or PR019578.
- the mice are sacrificed and the spleen cells are harvested.
- the spleen cells are then fused (using 35% polyethylene glycol) to a selected murine myeloma cell line such as P3X63AgU.1, available from ATCC, No. CRL 1597.
- the fusions generate hybridoma cells which can then be plated in 96 well tissue culture plates containing HAT (hypoxanthine, aminopterin, and thymidine) medium to inhibit proliferation of non-fused cells, myeloma hybrids, and spleen cell hybrids.
- HAT hyperxanthine, aminopterin, and thymidine
- the hybridoma cells will be screened in an ELISA for reactivity against PR010282 or PR019578.
- the positive hybridoma cells can be injected intraperitoneally into syngeneic Balb/c mice to produce ascites containing the anti-PR010282 or anti-PR019578 monoclonal antibodies.
- the hybridoma cells can be grown in tissue culture flasks or roller bottles. Purification of the monoclonal antibodies produced in the ascites can be accomplished using ammonium sulfate precipitation, followed by gel exclusion chromatography. Alternatively, affinity chromatography based upon binding of antibody to protein A or protein G can be employed.
- mice were hyper-immunized with purified Unizy e-conjugated amino acid peptide, corresponding to amino acids 532-667 of human Stra ⁇ , in Ribi adjuvant (Ribi Immunochem Research, Inc., Hamilton, MO).
- Ribi adjuvant Ribi Immunochem Research, Inc., Hamilton, MO.
- B-cells from popliteal lymph nodes were fused with mouse myeloma cells (X63.Ag8.653; American Type Culture Collection, Rockville, MD) as previously described (Hongo et al., Hybridoma 14:253-260 [1995]).
- supernatants were harvested and screened for antibody production by direct enzyme-linked immunosorbant assay (ELISA).
- PR010282 and PR019578 Polypeptides may be purified by a variety of standard techniques in the art of protein purification. For example, pro-PR010282 or pro-PR019578 polypeptide, mature PR010282 or PR019578 polypeptide, or pre-PR010282 or pre-PR019578 polypeptide is purified by immunoaffinity chromatography using antibodies specific for the PR010282 polypeptide of interest. In general, an immunoaffinity column is constructed by covalently coupling the anti-PR010282 or anti-PR019578 polypeptide antibody to an activated chromatographic resin.
- Polyclonal immunoglobulins are prepared from immune sera either by precipitation with ammonium sulfate or by purification on immobilized Protein A (Pharmacia LKB Biotechnology, Piscataway, N.J.). Likewise, monoclonal antibodies are prepared from mouse ascites fluid by ammonium sulfate precipitation or chromatography on immobilized Protein A (Pharmacia LKB Biotechnology, Piscataway, N.J.). Likewise, monoclonal antibodies are prepared from mouse ascites fluid by ammonium sulfate precipitation or chromatography on immobilized
- Protein A Partially purified immunoglobulin is covalently attached to a chromatographic resin such as CnBr-activated SEPHAROSETM (Pharmacia LKB Biotechnology). The antibody is coupled to the resin, the resin is blocked, and the derivative resin is washed according to the manufacturer's instructions.
- a chromatographic resin such as CnBr-activated SEPHAROSETM (Pharmacia LKB Biotechnology). The antibody is coupled to the resin, the resin is blocked, and the derivative resin is washed according to the manufacturer's instructions.
- Such an immunoaffinity column is utilized in the purification of PR010282 or PR019578 polypeptide by preparing a fraction from cells containing PR010282 or PR019578 polypeptide in a soluble form.
- This preparation is derived by solubilization of the whole cell or of a subcellular fraction obtained via differential centrifugation by the addition of detergent or by other methods well known in the art.
- soluble PR010282 or PR019578 polypeptide containing a signal sequence may be secreted in useful quantity into the medium in which the cells are grown.
- a soluble PR010282 or PR019578 polypeptide-containing preparation is passed over the immunoaffinity column, and the column is washed under conditions that allow the preferential absorbance of PR010282 or
- PR019578 polypeptide e.g., high ionic strength buffers in the presence of detergent. Then, the column is eluted under
- conditions that disrupt antibody/PR010282 or PR019578 polypeptide binding e.g., a low pH buffer such as approximately pH 2-3, or a high concentration of a chaotrope such as urea or thiocyanate ion
- a chaotrope such as urea or thiocyanate ion
- the PR010282 polypeptide or fragment employed in such a test may either be free in solution, affixed to a solid support, borne on a cell surface, or located intracellularly.
- One method of drug screening utilizes eukaryotic or prokaryotic host cells which are stably transformed with recombinant nucleic acids expressing the PR010282 polypeptide or fragment. Drugs are screened against such transformed cells in competitive binding assays. Such cells, either in viable or fixed form, can be used for standard binding assays.
- One may measure, for example, the formation of complexes between PR010282 polypeptide or a fragment and the agent being tested. Alternatively, one can examine the diminution in complex formation between the PR010282 polypeptide and its target cell or target receptors caused by the agent being tested.
- the present invention provides methods of screening for drugs or any other agents which can affect a PR010282 (Stra ⁇ ) polypeptide-associated disease or disorder. These methods comprise contacting such an agent with a Stra ⁇ polypeptide or fragment thereof and assaying (i) for the presence of a complex between the agent and the
- Stra ⁇ polypeptide or fragment or (ii) for the presence of a complex between the Stra ⁇ polypeptide or fragment and the cell, by methods well known in the art.
- the Stra ⁇ polypeptide or fragment is typically labeled. After suitable incubation, free Stra ⁇ polypeptide or fragment is separated from that present in bound form, and the amount of free or uncomplexed label is a measure of the ability of the particular agent to bind to Stra ⁇ polypeptide or to interfere with the Stra ⁇ polypeptide/cell complex.
- Another technique for drug screening provides high throughput screening for compounds having suitable binding affinity to a polypeptide and is described in detail in WO 84/03564, published on September 13, 1984. Briefly stated, large numbers of different small peptide test compounds are synthesized on a solid substrate, such as plastic pins or some other surface. As applied to a PR010282 (Stra ⁇ ) polypeptide, the peptide test compounds are reacted with Stra ⁇ polypeptide and washed. Bound Stra ⁇ polypeptide is detected by methods well known in the art. Purified Stra ⁇ polypeptide can also be coated directly onto plates for use in the aforementioned drug screening techniques. In addition, non-neutralizing antibodies can be used to capture the peptide and immobilize it on the solid support.
- This invention also contemplates the use of competitive drug screening assays in which neutralizing antibodies capable of binding a Stra ⁇ polypeptide specifically compete with a test compound for binding to a Stra ⁇ polypeptide or fragments thereof. In this manner, the antibodies can be used to detect the presence of any peptide which shares one or more antigenic determinants with the Stra6 polypeptide.
- PR010282 (Stra ⁇ ) polypeptide
- small molecules with which they interact, e.g., agonists, antagonists, or inhibitors. Any of these examples can be used to fashion drugs which are more active or stable forms of the native sequence PR010282 polypeptide or PR019578 polypeptide, or which enhance or interfere with the function of the native sequence PR010282 or PR019578 polypeptide //? vivo (c.f., Hodgson, Bio/Technology, 9: 19-21 (1991)).
- the three-dimensional structure of the native sequence PR010282 or PR019578 polypeptide, or of a PR010282 or PR019578 polypeptide-inhibitor complex is determined by x-ray crystallography, by computer modeling or, most typically, by a combination of the two approaches. Both the shape and charges of the native PR010282 or PR019578 polypeptide must be ascertained to elucidate the structure and to determine active site(s) of the molecule. Less often, useful information regarding the structure of the PR010282 or PR019578 polypeptide may be gained by modeling based on the structure of homologous proteins. In both cases, relevant structural information is used to design analogous PR010282 polypeptide-like molecules or to identify efficient inhibitors.
- Useful examples of rational drug design may include molecules which have improved activity or stability as shown by Braxton and Wells, Biochemistry, 31:7796-7801 (1992) or which act as inhibitors, agonists, or antagonists of native peptides as shown by Athauda etal., J. Biochem., 113:742-746 (1993).
- a target-specific antibody selected by functional assay, as described above, and then to solve its crystal structure.
- This approach in principle, yields a pharmacore upon which subsequent drug design can be based. It is possible to bypass protein crystallography altogether by generating anti-idiotypic antibodies (anti-ids) to a functional, pharmacologically active antibody. As a mirror image of a mirror image, the binding site of the anti-ids would be expected to be an analog of the original receptor. The anti-id could then be used to identify and isolate peptides from banks of chemically or biologically produced peptides. The isolated peptides would then act as the pharmacore.
- anti-ids anti-idiotypic antibodies
- PR010282 polypeptides including PR019578
- PR019578 such analytical studies as X-ray crystallography.
- PR010282 polypeptide amino acid sequences provided herein will provide guidance to those employing computer modeling techniques in place of or in addition to x-ray crystallography.
- Oligonucleotide probes were constructed from the PR010282 polypeptide-encoding nucleotide sequence shown in the accompanying figures for use in quantitative PCR amplification reactions.
- the oligonucleotide probes were chosen so as to give an approximately 200-600 base pair amplified fragment from the 3' end of its associated template in a standard PCR reaction.
- the oligonucleotide probes were employed in standard quantitative PCR amplification reactions with Clontech RNA isolated from different adult human tissue sources and analyzed by agarose gel electrophoresis so as to obtain a quantitative determination of the level of expression of the PR010282 polypeptide-encoding nucleic acid in the various tissues tested.
- h.Stra ⁇ .tmf3 5' CACACTCGAGAGCCAGATATTTT (SEQ ID NO: 6)
- h.Stra5.tmr4 5' AACAAGTTTATTGCAGGGAACAC
- h.Stra6.tmp4 5' TGTAGTTTTTATGCCTTTGGCTATTATGAAAGAGGT (SEQ ID NO: 8)
- In situ hybridization confirmed Stra ⁇ expression in kidney tubular epithelial cells, myometrium, and stromal cells surrounding breast ducts and lobules, whereas little or no expression was detected in sections of brain, liver, spleen, pancreas, heart, lung, stomach, small intestine, colon, prostate, spleen, and adrenal cortex (data not shown). Of the normal tissues examined by in situ hybridization, highest expression levels were seen in placenta and adrenal medulla, which were not included in the PCR analysis.
- EXAMPLE 12 Over-expression of native human PR010282 (Stra6) transcript in Human Tumors This example shows that the gene encoding native human full-length PR010282 (Stra ⁇ ) is significantly over- expressed in certain human colon tumors and also in cell lines derived from various human tumors such as colon, lung, kidney and breast.
- the starting material for the screen was total RNA isolated from human colon tumors, or various human colon, kidney, breast, or lung tumor cell lines.
- colon tumor tissue Stra ⁇ RNA expression was determined relative to RNA from normal colon tissue (mucosa) from the same patient. Stra ⁇ RNA expression in various tumor cell lines was determined in comparison with various normal cell lines (i.e., normal colon, kidney and lung cell lines).
- RT-PCR Real-time quantitative PCR
- Standard curves were used to determine relative levels of expression for each gene of interest as well as the glyceraldehyde-3-phosphate dehydrogenase (GAPDH) housekeeping gene for each sample analyzed.
- Relative normalized units were obtained by dividing the gene of interest mRNA level by the GAPDH mRNA level. Relative normalized units were compared between experimental sample and control to determine fold induction.
- Human lung cell lines include the normal human lung fibroblast cell lines MRC5 (CCL-171) and IMR90 (CCL-1)
- the human lung carcinoma epithelial cell line A549 (SRCC768, CCL-185), the human epidermoid lung carcinoma cell line Calu-1 (SRCC769; HTB-54), the human anaplastic carcinoma cell line Calu-6 (SRCC770, HTB-56 - probably lung), the human epithelial cell line NCI-H441 (SRCC772; HTB-174) which was derived from pericardial fluid of a patient with papillary adenocarcinoma of the lung, and the human lung squamous cell carcinoma cell line SW900 (SRCC775; HTB-59), all available from ATCC.
- Colon cell lines include, for example, the normal colon fibroblast cell line CCD1 12Co (CRL-1541), the human colorectal adenocarcinoma cell line CaCo-2 (HTB-37), the human colorectal adenocarcinoma cell line WiDr ' (CCL-218), the human colorectal carcinoma cell line HCT1 16 (CCL-247), the human colorectal adenocarcinoma cell line SK-Co1 (HTB-39) , the human colorectal adenocarcinoma cell line COL0320 (SRCC778; CCL-220), the human colorectal adenocarcinoma cell line HT29 (SRCC779; HTB-38), the human colorectal adenocarcinoma cell line SW403 (CCL-230), the human colon cancer cell line NCI/HCC2998, and the human colorectal adenocarcinoma cell line Colo320DM (CCL- 220
- Human breast carcinoma cell lines include the human breast adenocarcinoma cell line MCF7 (SRCC766; HTB- 22), and the human breast cancer cell line NCI/ADR-RES, both of which are publicly available.
- Kidney lines include the 293 cell line (CRL-1573) which is transformed with adenovirus 5 DNA. Two Wilm's tumor cell lines were also included in the analysis, G401 (CRL-1441) and SK-NEP-1 (CRL-1573).
- RNA was prepared from the foregoing cultured cell lines. The isolation was performed using purification kit, buffer set and protease from Qiagen, according to the manufacturer's instructions and the description below. More specifically, total RNA from cells in culture was isolated using Qiagen RNeasy midi-columns. Total RNA from tissue samples was isolated using RNA Stat-60 (Tel-Test). RNA prepared from tumor was isolated by cesium chloride density gradient centrifugation.
- Tumor samples were weighed and placed into 50 ml conical tubes and held on ice. Processing was limited to no more than 250 mg tissue per preparation (1 tip/preparation).
- the protease solution was freshly prepared by diluting into 6.25 ml cold ddH 2 0 to a final concentration of 20 ⁇ g/ml and stored at 4°C.
- G2 buffer (20 ml) was prepared by diluting DNAse A to a final concentration of 200 ⁇ g/ml (from 100 mg/ml stock).
- the tumor tissue was homogenized in 10 ml G2 buffer for 60 seconds using the large tip of the polytron in a laminar-flow TC hood in order to avoid inhalation of aerosols, and held at room temperature. Between samples, the polytron was cleaned by spinning at 2 x 30 seconds each in 2L, ddH 2 0, followed by G2 buffer (50 ml). If tissue was still present on the generator tip, the apparatus was disassembled and cleaned.
- Qiagen protease prepared as indicated above, 1.0 ml was added, followed by vortexing and incubation at 50 °C for 3 hours. The incubation and centrifugation were repeated until the lysates were clear (e.g., incubating additional 30-60 minutes, pelleting at 3000 x g for 10 minutes, 4 °C).
- RNA samples were initially expressed as delta CT units.
- One unit corresponds to one PCR cycle or approximately a 2-fold amplification relative to normal, two units correspond to
- hStra ⁇ .tmfM 5' AGACCAGGTCCCACACTGA (SEQ ID NO: 9)
- hStra ⁇ .tmrl 5' TTCATAATAGCCAAAGGCATAAAA (SEQ ID NO: 10)
- h.Stra6.tmp1 5' CTGCCCACACTCGAGAGCCAGAT 3' (SEQ ID NO: 11)
- Human GAPDH forward primer: 5'-GAAGATGGTGATGGGATTTC-3' (SEQ ID NO: 14) reverse primer ; 5'-GAAGGTGAAGGTCGGAGTC-3' (SEQ ID NO: 15) probe: 5'-CAAGCTTCCCGTTCTCAGCC-3' (SEQ ID NO: 16)
- the 5' nuclease assay reaction is a fluorescent PCR-based technique which makes use of the 5' exonuclease activity of Taq DNA polymerase enzyme to monitor amplification in real time.
- Two oligonucleotide primers are used to generate an amplicon typical of a PCR reaction.
- a third oligonucleotide, or probe is designed to detect nucleotide sequence located between the two PCR primers.
- the probe is non-extendible by Taq DNA polymerase enzyme, and is labeled with a reporter fluorescent dye and a quencher fluorescent dye. Any laser-induced emission from the reporter dye is quenched by the quenching dye when the two dyes are located close together as they are on the probe.
- the Taq DNA polymerase enzyme cleaves the probe in a template-dependent manner.
- the resultant probe fragments disassociate in solution, and signal from the released reporter dye is free from the quenching effect of the second fluorophore.
- One molecule of reporter dye is liberated for each new molecule synthesized, and detection of the unquenched reporter dye provides the basis for quantitative interpretation of the data.
- the 5' nuclease procedure is run on a real-time quantitative PCR device such as the ABI
- thermocyler thermocyler
- laser charge-coupled device
- CCD CCD
- camera CCD
- computer The system amplifies samples in a 96-well format on a thermocycler. During amplification, laser-induced fluorescent signal is collected in real-time through fiber optics cables for all 96 wells, and detected at the CCD.
- the system includes software for running the instrument and for analyzing the data.
- 5'-Nuclease assay data are initially expressed as Ct, or the threshold cycle. This is defined as the cycle at which the reporter signal accumulates above the background level of fluorescence.
- the Ct values are used as quantitative measurement of the relative number of starting copies of a particular target sequence in a nucleic acid sample when comparing the expression of RNA in a cancer cell with that from a normal cell.
- the human Stra6 RNA shows strong over-expression in human colon tumor tissues, when compared with corresponding normal human colon tissues.
- human Stra ⁇ RNA (corresponding to DNA148380-2827) was found to be over-expressed in all 14 human tumor colon tissues examined, relative to RNA from matched normal colorectal mucosa from the same patient.
- the over-expression varied between two- and 170-fold, and in 7 out of 14 tumor tissue samples was at least about 10-fold.
- the cycle threshold values obtained by quantitative PCR indicated that Stra ⁇ mRNA levels were extremely low or possibly absent in many of the normal mucosa samples.
- ISH ISH
- 3 P-labeled sense and antisense riboprobes were transcribed from an 874 bp PCR product corresponding to nucleotides 432-1247 of the coding sequence of human Stra ⁇ polypeptide encoded by DNA148380- 2827.
- Formalin-fixed, paraffin-embedded tissue sections were processes as described previously (Pennica et al., Proc. Natl. Acad. Sci USA 95:14717-22 [1998]). The results are shown in Figure 12B.
- the human Stra ⁇ RNA (corresponding to DNA148380-2827) is also significantly over- expressed in various breast, kidney, colon and lung tumor cell lines.
- "Relative RNA Expression” means that the RNA expression in normal and tumor tissues is shown relative to expression in an arbitrarily chosen standard cell line SW480.
- antagonists e.g., antibodies, organic and inorganic small molecules, peptides and polypeptides, such as Stra ⁇ variants, antisense oligonucleotides
- PR010282 DNA148380-2827
- PR019578 encoded by DNA148389-2827-1
- PR010282 could be enhanced by agents that stimulate the expression of the gene encoding PR010282.
- agents that stimulate the expression of the gene encoding PR010282 For example, treatment of human colorectal cancer cell lines with 9-cis-retinoic acid or all-trans retinoic acid resulted in a dramatic enhancement of the expression of the Stra ⁇ mRNA ( Figure 15).
- the treatment of cancer patients with therapeutic antibodies directed against PR010282 in combination with the appropriate retinoids would be expected to enhance tumor killing by the antibodies.
- antibodies directed against other native Stra ⁇ polypeptides over-expressed in various tumors such as the human splice variant encoded by DNA148389-2827-1.
- C57MG and C57MG/Wnt-1 cells were grown in Dulbecco's Modified Eagle medium supplemented with 10% fetal bovine serum, 2 mM L-glutamine, and 2.5 ⁇ g/ml puromycin (Edge Biosystems).
- C57MG cells with tetracycline- repressible Wnt-1 expression were grown in complete medium without puromycin, supplemented with 400 ⁇ g/ml G418
- HCT116 and WiDr cells Human colon adenocarcinoma cell lines HCT116 and WiDr cells were obtained from the American Type Culture Collection. HCT116 cells were maintained in McCoy's 5A media supplemented with 10% fetal bovine serum (FBS). WiDr cells were maintained in Dulbecco's minimal essential media (DMEM) supplemented with 10% FBS. For retinoic acid induction studies, cells were plated at 10 5 cells/60 mm dish containing 2.5 ml of medium and allowed to grow for 24 hours. Cells were treated with Vitamin D3, aW-tra ⁇ s-RA (Spectrum Laboratory Products), or 9-c/s-RA (Toronto Research Chemicals Inc.) (1 ⁇ M final concentration in DMSO) for the indicated times. Control cells were treated with an equal volume of DMSO.
- DMEM Dulbecco's minimal essential media
- Wnt-1 expression was induced by culturing cells in the absence of tetracycline for 0, 24, 48, or 72 hours.
- Cells were lysed in Triton X-100 lysis buffer [20 M tris-HCI (pH 8.0), 137 mM NaCI, 1% Triton X-100, 1 mM EGTA, 10% glycerol, 1.5 M MgCI 2 , 1 mM dithiothreitol, 1 mM sodium vanadate,
- WiDr cells were treated with 9-c/y-retinoic acid or DMSO, then detached and pelleted by low-speed centrifugation. Cell pellets were fixed overnight in 10% neutral buffered formalin, dehydrated, and embedded in paraffin. Immunohistochemistry was performed using anti-Stra6 peptide B monoclonal hybridoma culture supernatant (clone 12F4.2H9.1D5) or nonspecific mouse isotype lgG2A as primary antibodies, followed by detection using avidin- biotin complex method with diaminobenzidine as chromogen (Vectastain Elite Kit, Vector Laboratories) as described previously (Eberhard etal.. Am. J. Pathol.145:640-9 [1994]). Sections were counterstained with hematoxylin.
- Transgenic mice that express the Wnt-1 proto-oncogene in the mammary gland typically exhibit hyperplastic lesions and develop neoplasms in this tissue (Tsukamoto et al., Cell 55:619-625 [1988]). Such mice were used in the following experiments.
- the level of Stra ⁇ induction by Wnt-1 was comparable to that observed on stimulation of the parental C57MG cells with 9-e/s-RA.
- 9- ⁇ ?-RA treatment of the C57MG/Wnt- 1 cell line induced a further 10-fold increase in Stra ⁇ mRNA relative to either untreated C57MG/Wnt-1 or 9-c s-RA treated C57MG parent cells.
- Similar results were obtained with a ⁇ -trans-M. It was possible that potential clonal variations in the C57MG/Wnt-1 cell line, that were unrelated to Wnt-1 expression, accounted for their differential response to retinoic acid relative to parental control cells.
- Wnt-3a is a Wnt-1 homolog that exhibits transforming properties similar to those of Wnt-1 and can be produced as a soluble ligand in mouse L-cells.
- a slightly higher level of induction was observed on treatment of C57MG cells with 9- ⁇ s-RA.
- the combination of 9-c/s-RA and Wnt-3a resulted in levels of Stra ⁇ transcript vastly exceeding that seen with either agent alone.
- the RAR ⁇ gene has been proposed as a target for Wnt signaling in Xenopus embryos, and the induction of Stra ⁇ by retinoids was shown to be dependent upon the presence of this retinoic acid receptor subtype (McGrew et al.,
- transcription factors directly responsive to Wnt such as the TCF/LEFs might bind to and activate promoter elements in the Stra ⁇ gene; ii) signaling components in the Wnt pathway might directly interact with the appropriate retinoic acid receptor (RAR) and potentiate gene activation mediated by the RAR; or iii) signaling by Wnt-1 could activate expression of the appropriate RAR, which could then sensitize cells to retinoic acid.
- RAR retinoic acid receptor
- signaling by Wnt-1 could activate expression of the appropriate RAR, which could then sensitize cells to retinoic acid.
- RAR ⁇ might be inhibitory to Stra ⁇ expression, and activation of ⁇ -catenin by Wnt-1 could potentially relieve this inhibition if ⁇ -catenin inhibited RAR ⁇ function.
- ISRL one of the genes identified in the present screen, has been found to be contiguous with the Stra ⁇ gene. It is believed that any other gene flanking Stra ⁇ and/or ISRL, or any gene located in close proximity to Stra ⁇ and/or ISRL is a good candidate for the methods of the present invention.
- reagents that selectively enhance the level of antigen expression of cancer cells relative to normal cells are expected to improve the therapeutic index for immunotherapeutics directed against these antigens.
- a murine C57MG breast epithelial cell line was engineered to express the Wnt-1 proto-oncogene upon withdrawal of tetracycline from the cell culture media (Korinek et al., Mol Cell Biol 18:1248-56 (1998)).
- the cells were grown in 10 cm dishes in Dulbecco's Modified Eagle medium supplemented with 10% fetal bovine serum, 2mM L- glutamine, 100 units/ml penicillin/streptomycin, 200 ng/ml tetracycline, 400 ⁇ g/ml G418, and 100 ⁇ g/ml hygromycin B until approximately 60% confluent.
- RNA sample served as starting material for the preparation of probes required for oligonucleotide array analysis on the miroarray system of Affymetrix (Santa Clara, California). Probes were prepared according to previously described protocols (Wodicka etal. Nat Biotechnol 15:1359-1367 (1997)). Following hybridization, the arrays were washed and stained with streptavidin-phycoerythrin and then scanned with the Gene Array scanner (Agilent Technologies). Default parameters provided in the Affymetrix data analysis software package were applied in determining the signal intensities, referred to as average differences, and the fold differences for the 12,000 gene probe sets represented on the Affymetrix "A" Mu74 chip.
- RT-PCR reactions consisted of 100 ng RNA,
- Reverse Transcriptase 1.25 units of AmpliTaq Gold DNA Polymerase, 200 nM probe, and 500 nM primers. Reaction conditions consisted of reverse transcription at 48°C for 30 minutes, denaturation at 95°C for 10 minutes, and 40 cycles of 95°C for 25 seconds and B5°C for 1 minute. Reaction products were analyzed on 4-20% polyacrylamide gels.
- GAPDH forward primer 5'-TGCACCACCAACTGCTTAG-3' (SEQ ID NO: 17); reverse primer: 5'-GGATGCAGGGATGATGTTC-3' (SEQ ID NO: 18); probe: 5' CAGAAGACTGTGGATGGCCCCTC-3' (SEQ ID NO: 19).
- Ephrin B1 forward primer 5'- GTAGGCCAGGGCTATTTCTG-3' (SEQ D NO: 20); reverse primer: 5'-TGTCTCATGAGGGTCCAAAA-3' (SEQ ID NO: 21); probe: 5'-TGGCGCTCTTCTCTCCTCGGT-3' (SEQ ID NO: 22).
- ISLR forward primer 5'- GCCAGTACAGGATCTGGAAAG-3' (SEQ ID NO: 26); reverse primer: 5'- CATATCTCATCAGAGAGCATCTAAAA-3' (SEQ ID NO: 27); probe: 5'- AAG CTT TTA GCC TGC CCA GCC A-3' (SEQ ID NO: 28).
- Cos-7 cells were cotransfected with the indicated expression plasmids and the TREpal lucif erase reporter construct (Beyers) using Effectene (Qiagen) transfection reagent per the manufacturer's instructions. Expression plasmids have been described elsewhere. Cells were treated with 1 ⁇ M ATRA or DMSO control on the day of transfection and harvested 72 hours later by lysis in Triton X-100 lysis buffer. Luciferase activity in 10 ⁇ l of lysate was analyzed using a Tropix TR717 microplate luminometer. Activity was normalized to Renilla luciferase activity produced by cotransfection with SV40-Renilla luciferase. Activation of LEF/TCF-dependent transcription was determined by cotransfection with indicated plasmids and Top-tk-luciferase plasmid. Activity was determined as described above.
- the murine C57MG breast epithelial cell line undergoes morphological transformation in response to the expression of various Wnt genes (Wong etal., Mol Cell Biol 14:6278-6286 (1994)).
- a version of this cell line that was engineered to conditionally express Wnt-1 in response to the removal of tetracycline from the culture medium was employed for the gene expression profiling experiments.
- a second dish of cells was treated with 10OnM all-t/a/w-retinoic acid (ATRA) in the presence of tetracycline, while a third dish of cells received DMSO control and the tetracycline was removed to activate expression of Wnt-1. Finally, a fourth dish of cells was treated with ATRA and the tetracycline was removed. Following a forty eight hour incubation period, cells were harvested and RNA was extracted and purified. Probes synthesized from the RNA was hybridized to the Affymetrix Mouse Gene Chip "A" Mu74 containing 12,000 oligonucleotide probe sets. The experiment, as initiated from the growth and treatment of cells, was performed three independent times.
- ATRA 10OnM all-t/a/w-retinoic acid
- RNA transcripts that underwent at least a two-fold increase or a 50% decrease relative to the untreated cells in all three experiments.
- a time course was performed in which RNA was collected from treated cells at 24, 48 and 72 hours. These data are included only for select genes. Treatment of the C57MG cells with retinoic acid alone resulted in the robust activation of numerous genes
- retinoic acid genes induced by retinoic acid, such as retinal short-chain dehydrogenase and aldehyde dehydrogenase 3, code for enzymes that are involved in the metabolism of retinoids and might, therefore, represent feedback or feed-forward responses to retinoic acid itself (Duester, EurJ Biochem 267:4315-4324 (2000)).
- retinoic acid also induced by retinoic acid, such as autotaxin, thioether S-methyl transferase and angiotensiogen, bear no obvious connection to retinoic acid signaling or metabolism and have not been previously reported to be activated by receptors responsive to retinoic acid.
- TCF1 and BTEB2 transcription factors were previously reported to be targets of Wnt signaling (Ziemer et al., Mol Cell Biol 21:562-574 (2001); Roose et al., Science 285:1923-1926 (1999)).
- Wnt signaling and thus function as tumor suppressors.
- one of the Wnt receptors, frizzled-2 was also upregulated by Wnt signaling in the C57MG cell line.
- Wnt-1 genes upregulated by Wnt-1, such as GADD45 gamma and 4-1BB ligand, might represent a response to inappropriate growth signaling due to the overexpression of Wnt-1.
- the 4-1BB ligand (CD137) is a TNF superfamily member that is expressed on various human carcinoma cell lines and stimulates T-cell responses in tumor rejection.
- stra ⁇ As described above, we identified stra ⁇ as a gene activated by Wnt-1 signaling. Stra ⁇ was originally identified in a screen designed to detect mRNA transcripts induced by retinoic acid receptor signaling (Bouillet et al., Dev Biol 170:420-433 (1995)). Although we found that retinoic acid induced the expression of stra ⁇ , we also demonstrated its synergistic activation by a combination of Wnt-1 and retinoic acid (see Example 13 above). Therefore, we were interested in whether genes in addition to stra ⁇ could be activated in a like fashion.
- the ISLR gene was responsive to retinoic acid, but not to Wnt, while the combination of both agents resulted in activation that exceeded that of retinoic acid alone ( Figure 23).
- Wnt-1 was dependent upon retinoic RAR signaling for the induction of stra ⁇ . Therefore, it is conceivable that Wnt facilitates RAR signaling in a manner that does not involve the canonical Wnt-1 pathway in which ⁇ -catenin interacts the TCF/LEF transcription factors.
- RARE RAR response element
- mammary tumors derived from Wnt-1 transgenic mice prepared as described in Example 13 were transplanted to the mammary fad pad of na ⁇ ve mice that were subsequently administered retinoic acid.
- Administration of retinoic acid (ATRA) but not vehicle control resulted in the upregulation Stra ⁇ mRNA in the transplanted mouse mammary tumors but did not have a significant effect on Stra ⁇ expression in normal mammary tissue.
- FIG 26 shows the effect of induction of Stra ⁇ following peritumor injection of 100mg/kg and 400 mg/kg (about 10 mg total/25 gram mouse) all-trans retinoic acid.
- a control gene, retinal DHR which is responsive to retinoic acid alone, was induced in normal mammary tissue (data not shown).
- "Turn” stands for transplanted mouse mammary tumor;
- MG stands for normal mammary tissue,
- PT stands for peri-tumor, and the numbers immediately preceding the "MG” and “Turn” are used to designate the particular animals from which samples were taken.
- the data presented are mRNA expression levels normalized to the housekeeping gene, GAPDH.
- Standard curves were used to determine relative levels of expression for each gene of interest as well as the GAPDH housekeeping gene for each sample analyzed.
- Relative normalized units were obtained by dividing the mRNA level for the gene of interest by the GAPDH mRNA level. Tumors and nomal adjacent mammary glands were harvested 8 hours after treatment.
- Figure 27 shows that administration of ATRA to nude mice bearing WiDr xenografts also induces Stra ⁇ . Specif ially the mice were given ATRA per orum (PO) at 400 mg/kg. The tumors were harvested 12 hours following treatment. In this experiment oral administration of ATRA (PO) was tested as well as peritumoral administration (data not shown). The data presented in Figure 27 show that oral administration of 400 mg/kg of ATRA selectively upregulates Stra ⁇ mRNA in WiDr xenografts as compared to untreated control. mRNA expression levels were normalized as discussed above. Deposit of Material
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Cited By (6)
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WO2002077027A1 (en) * | 2000-03-23 | 2002-10-03 | Curagen Corporation | Human stra6-like protein and nucleic acids encoding the same |
EP1496879A1 (en) * | 2002-04-05 | 2005-01-19 | The University of Utah Research Foundation | Regulation of a novel colon specific retinol dehydrogenase by apc and cdx2 |
US8029808B2 (en) | 2002-04-25 | 2011-10-04 | University Of Connecticut | Using heat shock proteins to improve the therapeutic benefit of a non-vaccine treatment modality |
US8323902B2 (en) | 2004-12-22 | 2012-12-04 | Genentech, Inc. | Methods for producing soluble membrane-spanning proteins |
US9845359B2 (en) | 2011-05-16 | 2017-12-19 | Genentech, Inc. | FGFR1 agonists and methods of use |
US9873748B2 (en) | 2013-12-23 | 2018-01-23 | Genentech, Inc. | Bispecific antibodies binding to beta-klotho and fibroblast growth factor receptor 1 |
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TWI407971B (en) * | 2007-03-30 | 2013-09-11 | Nitto Denko Corp | Cancer cells and tumor-related fibroblasts |
CN114574378B (en) * | 2022-04-11 | 2023-09-22 | 浙江大学 | Genetically engineered bacterium for producing retinoic acid, construction method and application thereof |
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- 2001-07-10 NZ NZ524230A patent/NZ524230A/en not_active IP Right Cessation
- 2001-07-10 EP EP01950996A patent/EP1341923A2/en not_active Withdrawn
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- 2001-07-10 JP JP2002522514A patent/JP2004507251A/en active Pending
- 2001-07-10 AT AT05023231T patent/ATE453718T1/en not_active IP Right Cessation
- 2001-07-10 KR KR1020087015948A patent/KR20080068147A/en not_active Application Discontinuation
- 2001-07-10 WO PCT/US2001/021635 patent/WO2002018608A2/en not_active Application Discontinuation
- 2001-07-10 AU AU2001271938A patent/AU2001271938A1/en not_active Abandoned
- 2001-07-10 DE DE60140966T patent/DE60140966D1/en not_active Expired - Lifetime
- 2001-07-10 CA CA2420867A patent/CA2420867C/en not_active Expired - Fee Related
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WO2002077027A1 (en) * | 2000-03-23 | 2002-10-03 | Curagen Corporation | Human stra6-like protein and nucleic acids encoding the same |
EP1496879A1 (en) * | 2002-04-05 | 2005-01-19 | The University of Utah Research Foundation | Regulation of a novel colon specific retinol dehydrogenase by apc and cdx2 |
EP1496879A4 (en) * | 2002-04-05 | 2008-06-18 | Univ Utah Res Found | Regulation of a novel colon specific retinol dehydrogenase by apc and cdx2 |
US9248172B2 (en) | 2002-04-25 | 2016-02-02 | University Of Connecticut Health Center | Using heat shock proteins to improve the therapeutic benefit of a non-vaccine treatment modality |
US8591890B2 (en) | 2002-04-25 | 2013-11-26 | University Of Connecticut Health Center | Using heat shock proteins to improve the therapeutic benefit of a non-vaccine treatment modality |
US8029808B2 (en) | 2002-04-25 | 2011-10-04 | University Of Connecticut | Using heat shock proteins to improve the therapeutic benefit of a non-vaccine treatment modality |
US9352019B2 (en) | 2002-04-25 | 2016-05-31 | University Of Connecticut Health Center | Using heat shock proteins to improve the therapeutic benefit of a non-vaccine treatment modality |
US8323902B2 (en) | 2004-12-22 | 2012-12-04 | Genentech, Inc. | Methods for producing soluble membrane-spanning proteins |
US9845359B2 (en) | 2011-05-16 | 2017-12-19 | Genentech, Inc. | FGFR1 agonists and methods of use |
US9873748B2 (en) | 2013-12-23 | 2018-01-23 | Genentech, Inc. | Bispecific antibodies binding to beta-klotho and fibroblast growth factor receptor 1 |
US9884919B2 (en) | 2013-12-23 | 2018-02-06 | Genentech, Inc. | Methods of treatment with bispecific antibodies binding to beta-klotho and fibroblast growth factor receptor 1 |
US10246518B2 (en) | 2013-12-23 | 2019-04-02 | Genentech, Inc. | Nucleic acids encoding bispecific antibodies binding to beta-Klotho and fibroblast growth factor receptor 1 |
US10882921B2 (en) | 2013-12-23 | 2021-01-05 | Genentech, Inc. | Host cell comprising nucleic acids encoding bispecific antibodies binding to beta-klotho and fibroblast growth factor receptor 1 and antibody production |
Also Published As
Publication number | Publication date |
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ATE453718T1 (en) | 2010-01-15 |
WO2002018608A3 (en) | 2003-06-26 |
JP2004507251A (en) | 2004-03-11 |
CA2420867C (en) | 2013-02-05 |
NZ524230A (en) | 2006-05-26 |
EP1341923A2 (en) | 2003-09-10 |
KR20080068147A (en) | 2008-07-22 |
AU2001271938A1 (en) | 2002-03-13 |
WO2002018608A9 (en) | 2003-08-07 |
EP1666600A1 (en) | 2006-06-07 |
CA2420867A1 (en) | 2002-03-07 |
DE60140966D1 (en) | 2010-02-11 |
ES2337696T3 (en) | 2010-04-28 |
EP1666600B1 (en) | 2009-12-30 |
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