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Endocrinology |
Departments of Medicine [M. M., R. N., E. P.], Molecular and Cellular Biology [M. M., N. L. W., D. J. L.], and Pathology [M. I.], Scott Department of Urology [S. M., R. S., L. M., Y. Z., D. D., A. E., J. E., D. J. L.], Baylor College of Medicine, and Veterans Affairs Medical Center [M. M., M. I.], Houston, Texas 77030
We analyzed the frequency and relevance of mutations in the coding region of the androgen receptor (AR) in genomic DNA extracted from 137 specimens of prostate cancer. The specimens were obtained from the primary tumors of patients affected by stage B disease [15 nonmicrodissected (group 1A) and 84 microdissected (group 1B)] and from the metastatic deposits of individuals with stage D1 disease [8 nonmicrodissected (group 2A) and 30 microdissected (group 2B)] who had not undergone androgen ablation therapy. The study was conducted by PCR-single strand conformational polymorphism (SSCP) analysis of exons 28 in the four groups and direct sequence analysis of exon 1 in group 1B. As positive and negative controls, we used genomic DNA extracted from genital skin fibroblasts of patients affected by various forms of androgen resistance with known mutations in the AR. To control for genetic instability, PCR-SSCP analysis of exon 2 of the human progesterone receptor was carried out on each specimen.
The overall number of mutations detected was 11 (8%). No mutations were detected in any of the 99 patients with stage B disease. Eleven mutations were detected in exons 28 in 8 of the 38 patients with stage D1 disease (all in group 2B). Simultaneous analysis of exon 2 of the progesterone receptor was carried out, and no SSCP changes were identified.
These data suggest that AR mutations are rare and presumably do not play a role in the initial phase of prostatic carcinogenesis. The presence of a significant number of AR mutations in metastatic disease indicates that mutations of this molecule may play a role in the most advanced phases of the natural history of this disease, either by facilitating growth or acquisition of the metastatic phenotype.
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A. V. Krishnan, X.-Y. Zhao, S. Swami, L. Brive, D. M. Peehl, K. R. Ely, and D. Feldman A Glucocorticoid-Responsive Mutant Androgen Receptor Exhibits Unique Ligand Specificity: Therapeutic Implications for Androgen-Independent Prostate Cancer Endocrinology, May 1, 2002; 143(5): 1889 - 1900. [Abstract] [Full Text] [PDF] |
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C.-Y. Chang and D. P. McDonnell Evaluation of Ligand-Dependent Changes in AR Structure Using Peptide Probes Mol. Endocrinol., April 1, 2002; 16(4): 647 - 660. [Abstract] [Full Text] [PDF] |
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C.-Y. Chang, P. J. Walther, and D. P. McDonnell Glucocorticoids Manifest Androgenic Activity in a Cell Line Derived from a Metastatic Prostate Cancer Cancer Res., December 1, 2001; 61(24): 8712 - 8717. [Abstract] [Full Text] [PDF] |
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V. Nwosu, J. Carpten, J. M. Trent, and R. Sheridan Heterogeneity of genetic alterations in prostate cancer: evidence of the complex nature of the disease Hum. Mol. Genet., October 1, 2001; 10(20): 2313 - 2318. [Abstract] [Full Text] [PDF] |
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M. E. Taplin and S.-M. Ho The Endocrinology of Prostate Cancer J. Clin. Endocrinol. Metab., August 1, 2001; 86(8): 3467 - 3477. [Full Text] [PDF] |
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G. Buchanan, N. M. Greenberg, H. I. Scher, J. M. Harris, V. R. Marshall, and W. D. Tilley Collocation of Androgen Receptor Gene Mutations in Prostate Cancer Clin. Cancer Res., May 1, 2001; 7(5): 1273 - 1281. [Abstract] [Full Text] |
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S. F. Shariat, S. Desai, W. Song, T. Khan, J. Zhao, C. Nguyen, B. A. Foster, N. Greenberg, D. M. Spencer, and K. M. Slawin Adenovirus-mediated Transfer of Inducible Caspases: A Novel "Death Switch" Gene Therapeutic Approach to Prostate Cancer Cancer Res., March 1, 2001; 61(6): 2562 - 2571. [Abstract] [Full Text] |
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B. Lin, J. T. White, C. Ferguson, S. Wang, R. Vessella, R. Bumgarner, L. D. True, L. Hood, and P. S. Nelson Prostate Short-Chain Dehydrogenase Reductase 1 (PSDR1): A New Member of the Short-Chain Steroid Dehydrogenase/Reductase Family Highly Expressed in Normal and Neoplastic Prostate Epithelium Cancer Res., February 1, 2001; 61(4): 1611 - 1618. [Abstract] [Full Text] |
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F. Yeung, X. Li, J. Ellett, J. Trapman, C. Kao, and L. W. K. Chung Regions of Prostate-specific Antigen (PSA) Promoter Confer Androgen-independent Expression of PSA in Prostate Cancer Cells J. Biol. Chem., December 22, 2000; 275(52): 40846 - 40855. [Abstract] [Full Text] [PDF] |
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J. E. Chipuk, S. C. Cornelius, N. J. Pultz, J. S. Jorgensen, M. J. Bonham, S.-J. Kim, and D. Danielpour The Androgen Receptor Represses Transforming Growth Factor-beta Signaling through Interaction with Smad3 J. Biol. Chem., January 4, 2002; 277(2): 1240 - 1248. [Abstract] [Full Text] [PDF] |
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