The androgen receptor in hormone-refractory prostate cancer: relevance of different mechanisms of androgen receptor signaling (Review).

Abstract:

:The last decade has brought increased awareness to prostate cancer as a significant health problem. Prostate cancer is very heterogeneous in its etiology and progression, but androgen signaling appears to be a common key element in its development and progression. Blocking of androgen signaling results in a decrease in tumor volume as well as a decline in serum PSA in the majority of patients with prostate cancer. Today, endocrine therapy involves androgen depletion by orchiectomy or by treatment with LHRH-analoga as well as blockade of the androgen receptor (AR) with anti-androgens. However, during these treatments almost all tumors relapse to a hormone-insensitive state. The mechanisms that lead from initially androgen-sensitive to androgen-unresponsive tumor cell growth have been partly elucidated by new insights into the molecular mechanisms of androgen receptor signaling over the past several years. In addition to androgen receptor mutations that broaden the ligand-specificity of the AR, androgen-independent transactivation of the AR by peptide growth factors such as epidermal growth factor and insulin-like growth factor-I has been discovered. Furthermore, analysis of proteins that interact with the AR led to the isolation of coactivator proteins that mediate transcriptional activation by the AR. The following review will discuss the elements involved in androgen receptor signaling and summarize the present knowledge of their biological and clinical relevance in advanced prostate cancer.

journal_name

Int J Oncol

authors

Cronauer MV,Schulz WA,Burchardt T,Anastasiadis AG,de la Taille A,Ackermann R,Burchardt M

doi

10.3892/ijo.23.4.1095

keywords:

subject

Has Abstract

pub_date

2003-10-01 00:00:00

pages

1095-102

issue

4

eissn

1019-6439

issn

1791-2423

journal_volume

23

pub_type

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