期刊
PROSTATE
卷 67, 期 2, 页码 135-145出版社
WILEY
DOI: 10.1002/pros.20479
关键词
prostate; cadmium; androgen-independence; malignant transformation; androgen receptor; estrogen receptor; IGF-1
资金
- Intramural NIH HHS Funding Source: Medline
BACKGROUND. Lethal prostate cancers often become androgen-independent due to androgen receptor (AR) overexpression. The role of cadmium in prostate tumor progression was determined. METHODS. Control and cadmium-transformed prostate epithelial cells (CTPE) were compared for steroid-induced proliferation, steroid receptor expression, and androgen metabolism. RESULTS. CTPE cells showed rapid proliferation in complete medium and sustained proliferation in steroid-reduced medium. Androgens stimulated significantly less cell proliferation and AR-related genes expression in CTPE cells. 5 alpha-Dihydrotestosterone increased PSA expression more effectively in control cells. Flutamide reduced 5 alpha-dihydrotestosterone-stimulated growth less effectively in CTPE cells compared to control. CTPE cells showed decreased p27 expression. Estrogen receptors were overexpressed and estradiol markedly stimulated proliferation in CTPE cells. In CTPE cells 5 alpha-aromatase was markedly increased, while 5 alpha-reductase was decreased. CONCLUSIONS. Cadmium-induced malignant transformation stimulates androgen independence, unrelated to AR expression or activity. Increased estrogen receptor and 5 alpha-aromatase expression suggest estrogen signaling may be critical to this process. (c) 2006 Wiley-Liss, Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据