| Pharmacological uncoupling of androgen receptor-mediated prostate cancer cell proliferation and prostate-specific antigen secretion. | |
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MedLine Citation:
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PMID: 14633736 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The androgen receptor (AR), a member of the nuclear receptor family, is a ligand-inducible transcription factor. In the prostate gland, androgens regulate the transcription of several genes that ultimately result in cell growth and differentiation. With a goal of developing tissue-selective AR modulators that can be used to treat prostate cancer and other androgenopathies, we have taken an approach to identify androgens that function in a manner distinct from the physiological androgens testosterone and dihydrotestosterone. Classical AR agonists function by binding to and inducing a conformational change in the receptor. This facilitates the obligate interaction of the amino and carboxyl terminus of the receptor, recruitment of coactivators, and subsequent regulation of target genes. On the basis of this paradigm, we screened a library of potential AR agonists for compounds that induce an "activating" conformational change in the receptor structure but that do not facilitate a high-affinity intermolecular interaction between the amino and carboxyl terminus. Compounds identified in this manner behaved as partial agonists of AR-mediated transcription in a variety of assays. Additional compounds were identified in this screen that did not allow the activation function-2 coactivator pocket to form and were demonstrated to function as weak agonists of AR-mediated transcription. Surprisingly, when we examined the ability of these compounds to induce cell proliferation, we observed that despite having different degrees of partial agonist activities on classical transcriptional responses (i.e., induction of prostate-specific antigen), these compounds were as efficacious as dihydrotestosterone in stimulating proliferation. The unexpected finding that AR-mediated transcription and proliferation can be uncoupled suggests that AR is not used in the same manner in all androgen-regulated biological processes. |
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Authors:
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Ganesan Sathya; Ching-yi Chang; Dmitri Kazmin; C Edgar Cook; Donald P McDonnell |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Cancer research Volume: 63 ISSN: 0008-5472 ISO Abbreviation: Cancer Res. Publication Date: 2003 Nov |
Date Detail:
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Created Date: 2003-11-24 Completed Date: 2004-02-09 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 2984705R Medline TA: Cancer Res Country: United States |
Other Details:
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Languages: eng Pagination: 8029-36 Citation Subset: IM |
Affiliation:
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Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC 27710, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Androgens
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pharmacology,
physiology Animals Cell Division / drug effects, physiology Haplorhini Humans Male Prostate-Specific Antigen / secretion* Prostatic Neoplasms / drug therapy*, pathology, secretion Receptors, Androgen / agonists*, physiology Transcriptional Activation / drug effects, physiology Transfection |
| Grant Support | |
ID/Acronym/Agency:
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CA 95094-02/CA/NCI NIH HHS; DK 50494/DK/NIDDK NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Androgens; 0/Receptors, Androgen; EC 3.4.21.77/Prostate-Specific Antigen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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