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Journal Article
Research Support, Non-U.S. Gov't
17 alpha androstenediol inhibition of breast tumor cell proliferation in estrogen receptor-positive and -negative cell lines.
Androstene-3beta, 17alpha-diol (17alpha-AED) inhibits DNA synthesis and induces apoptosis in several myeloid cancer cell lines. The purpose of this study was to determine if 17alpha-AED inhibition of human breast carcinoma cell proliferation is dependent on the estrogen or androgen receptor. At concentrations of 12.5 to 50 x 10(-9) M 17alpha-AED inhibited the proliferation of ZR75-1, estrogen receptor-positive (ER+) cells, by 54% to 68%. Further, 17alpha-AED inhibited MDA-MB231, estrogen receptor-negative (ER-) cells, by 33.6% to 56.0%. The inhibitory effect was dose dependent with a minimal effective inhibitory dose at 12.5x10(-9) M for both cell lines. Both 17beta-AED and estradiol potentiate the inhibitory effect of 17alpha-AED on ER+ cells at lower doses (3.13 to 6.25 x 10(-9) M) where 17alpha-AED alone was not inhibitory. The inhibitory action of 17alpha-AED on human mammary carcinomas appears to be independent of either the alpha estrogen or the androgen receptors.
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