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NCI-Navy Medical Oncology Branch, National Cancer Institute, National Institute of Health, Bethesda, Maryland 20889-5105 [P. G. J., C. J. A.], and Norris Comprehensive Cancer Center, University of Southern California School of Medicine, Los Angeles, California 90033 [H-J. L., C. G. L., K. D. D., P. V. D., L. L.]
Thymidylate synthase (TS) is the target enzyme for 5-fluorouracil (5-FU). We have correlated TS protein and gene expression with the response in patients with colorectal (n = 9) and gastric cancer (n = 12) treated with infusional 5-FU plus leucovorin (LV) or infusional 5-FU/LV and cisplatin, respectively. TS protein expression was analyzed by Western blot using TS106 monoclonal antibody and densitometry scanning. TS gene expression was measured by PCR analysis using ß-actin as an internal standard and expressed as a TS:ß-actin mRNA ratio. A close linear relationship was noted between TS protein expression and TS gene expression (r2 = 0.60) for the 21 tumor samples analyzed. TS immunohistochemical staining on 15 of the 21 samples revealed that the TS staining intensity correlated closely with TS protein and mRNA expression. In two biopsy samples, TS protein levels and TS gene expression did not correlate; however, one of these exhibited a focal TS staining pattern.
Both the TS protein level and TS gene expression were significantly associated with response to 5-FU-based therapy. Patients with responsive disease had a mean TS protein level of 0.17 ± 0.03 arbitrary units (range, 0.05 to 0.38), whereas in patients whose tumors did not respond, the mean TS protein level was significantly higher 0.60 ± 0.09 (range, 0.06 to 1.01; P < 0.01). A similar pattern was noted with TS gene expression. In patients with responsive disease, the mean TS:ß-actin gene ratio was 1.36 ± 0.3 (range, 0.53.3 x 10-3). In contrast, biopsies from patients with unresponsive disease had a mean TS:ß-actin gene ratio of 15.4 ± 2.6 x 10-3 (range, 2.735.9; P < 0.01). TS protein and TS mRNA expression are highly correlated, and each predict for response to 5-FU/LV-based chemotherapy in patients with colorectal and gastric cancer.
1 Partially supported by Grants 5 U01 CA60108 and 5 R01 CA56119 from the National Cancer Institute.
2 To whom requests for reprints should be addressed, at NCI-Navy Medical Oncology Branch, National Cancer Institute, National Naval Medical Center, 8901 Wisconsin Ave., Bldg. 8, Room 5101, Bethesda, MD 20889-5105.
Received 12/22/94. Accepted 2/14/95.
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D. Edler, M. Hallström, P. G. Johnston, I. Magnusson, P. Ragnhammar, and H. Blomgren Thymidylate Synthase Expression: An Independent Prognostic Factor for Local Recurrence, Distant Metastasis, Disease-free and Overall Survival in Rectal Cancer Clin. Cancer Res., April 1, 2000; 6(4): 1378 - 1384. [Abstract] [Full Text] |
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D. Edler, U. Kressner, P. Ragnhammar, P. G. Johnston, I. Magnusson, B. Glimelius, L. Påhlman, G. Lindmark, and H. Blomgren Immunohistochemically Detected Thymidylate Synthase in Colorectal Cancer: An Independent Prognostic Factor of Survival Clin. Cancer Res., February 1, 2000; 6(2): 488 - 492. [Abstract] [Full Text] |
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A. S. Haqqani, R. T. Cowling, J. A. Maroun, and H. C. Birnboim Characterization of a Polyclonal Antibody to Human Thymidylate Synthase Suitable for the Study of Colorectal Cancer Specimens J. Histochem. Cytochem., December 1, 1999; 47(12): 1563 - 1574. [Abstract] [Full Text] |
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H. Shiga, E. I. Heath, A. A. Rasmussen, B. Trock, P. G. Johnston, A. A. Forastiere, M. Langmacher, A. Baylor, M. Lee, and K. J. Cullen Prognostic Value of p53, Glutathione S-Transferase {{pi}}, and Thymidylate Synthase for Neoadjuvant Cisplatin-based Chemotherapy in Head and Neck Cancer Clin. Cancer Res., December 1, 1999; 5(12): 4097 - 4104. [Abstract] [Full Text] [PDF] |
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M. E. Kitchens, A. M. Forsthoefel, K. W. Barbour, H. T. Spencer, and F. G. Berger Mechanisms of Acquired Resistance to Thymidylate Synthase Inhibitors: The Role of Enzyme Stability Mol. Pharmacol., November 1, 1999; 56(5): 1063 - 1070. [Abstract] [Full Text] |
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J. L. Grem, J. M. Sorensen, E. Cullen, C. H. Takimoto, S. M. Steinberg, A. P. Chen, J. M. Hamilton, S. G. Arbuck, N. McAtee, D. Lawrence, et al. A Phase I Study of Raltitrexed, an Antifolate Thymidylate Synthase Inhibitor, in Adult Patients with Advanced Solid Tumors Clin. Cancer Res., September 1, 1999; 5(9): 2381 - 2391. [Abstract] [Full Text] [PDF] |
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J. M. Collins, R. W. Klecker, and A. G. Katki Suicide Prodrugs Activated by Thymidylate Synthase: Rationale for Treatment and Noninvasive Imaging of Tumors with Deoxyuridine Analogues Clin. Cancer Res., August 1, 1999; 5(8): 1976 - 1981. [Abstract] [Full Text] [PDF] |
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S. Cascinu, C. Aschele, S. Barni, D. Debernardis, C. Baldo, G. Tunesi, V. Catalano, M. P. Staccioli, A. Brenna, P. Muretto, et al. Thymidylate Synthase Protein Expression in Advanced Colon Cancer: Correlation with the Site of Metastasis and the Clinical Response to Leucovorin-modulated Bolus 5-Fluorouracil Clin. Cancer Res., August 1, 1999; 5(8): 1996 - 1999. [Abstract] [Full Text] [PDF] |
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M. Kornmann, K. D. Danenberg, N. Arber, H. G. Beger, P. V. Danenberg, and M. Korc Inhibition of Cyclin D1 Expression in Human Pancreatic Cancer Cells Is Associated with Increased Chemosensitivity and Decreased Expression of Multiple Chemoresistance Genes Cancer Res., July 1, 1999; 59(14): 3505 - 3511. [Abstract] [Full Text] [PDF] |
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C. Aschele, D. Debernardis, S. Casazza, G. Antonelli, G. Tunesi, C. Baldo, R. Lionetto, F. Maley, and A. Sobrero Immunohistochemical Quantitation of Thymidylate Synthase Expression in Colorectal Cancer Metastases Predicts for Clinical Outcome to Fluorouracil-Based Chemotherapy J. Clin. Oncol., June 1, 1999; 17(6): 1760 - 1760. [Abstract] [Full Text] [PDF] |
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Y. Ishikawa, T. Kubota, Y. Otani, M. Watanabe, T. Teramoto, K. Kumai, M. Kitajima, T. Takechi, H. Okabe, and M. Fukushima Dihydropyrimidine Dehydrogenase Activity and Messenger RNA Level May Be Related to the Antitumor Effect of 5-Fluorouracil on Human Tumor Xenografts in Nude Mice Clin. Cancer Res., April 1, 1999; 5(4): 883 - 889. [Abstract] [Full Text] [PDF] |
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M. M. Davies, P. G. Johnston, S. Kaur, and T. G. Allen-Mersh Colorectal Liver Metastasis Thymidylate Synthase Staining Correlates with Response to Hepatic Arterial Floxuridine Clin. Cancer Res., February 1, 1999; 5(2): 325 - 328. [Abstract] [Full Text] [PDF] |
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M. R. Posner, P. G. Johnston, R. B. Tishler, J. Andersen, M. Fiorentino, P. M. Busse, L. A. Cavacini, A. D. Colevas, J. Clark, and C. M. Norris The Prognostic Value of Thymidylate Synthase and p53 Expression in Patients Treated with Induction Chemotherapy for Squamous Cell Carcinoma of the Head and Neck Oncologist, December 1, 1998; 3(6): 424 - 431. [Abstract] [Full Text] |
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R. Gorlick, E. Goker, T. Trippett, P. Steinherz, Y. Elisseyeff, M. Mazumdar, W. F. Flintoff, and J. R. Bertino Defective Transport Is a Common Mechanism of Acquired Methotrexate Resistance in Acute Lymphocytic Leukemia and Is Associated With Decreased Reduced Folate Carrier Expression Blood, February 1, 1997; 89(3): 1013 - 1018. [Abstract] [Full Text] [PDF] |
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J. Jolivet, A. Dayan, M. Beauchemin, D. Chahla, A. Mamo, and R. Bertrand Biochemical and Molecular Studies of Human Methenyltetrahydrofolate Synthetase Oncologist, August 1, 1996; 1(4): 248 - 253. [Abstract] [Full Text] [PDF] |
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E. Chu, J. L. Grem, P. G. Johnston, and C. J. Allegra New Concepts for the Development and Use of Antifolates Oncologist, August 1, 1996; 1(4): 255 - 259. [Abstract] [Full Text] [PDF] |
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