Estrogenic and neuroprotective activity of the neurosteroid dehydroepiandrosterone
Abstract
The aim of the study was triple: (1) To determine whether dehydroepiandrosterone (DHEA) exerts hormonal activity in breast cancer cells (MCF-7), in endometrial adenocarcinoma cells (Ishikawa) as well as in prostate adenocarcinoma cells (LNCaP). We were also interested in the type of the receptor which is being involved in mediating DHEA’s activity. The results indicate that DHEA exhibits estrogenic activity in Ishikawa adenocarcinoma cells and in MCF-7 breast cancer cells while it is unable to induce proliferation in LNCaP prostate cells. DHEA activation of MCF-7 cell proliferation was mediated through ERα and required mainly conversion of DHEA to 5-androstenediol (5-diol). Given that 17β hydroxy-steroid-dehydrogenase type 1 (17β HSD-1), the enzyme that converts DHEA to 5-diol, is overexpressed in breast cancer cells, the use of DHEA as a dietary supplement is contraindicated in high risk subjects for breast cancer. (2) To study whether DHEA can modulate the anticancer activity of a ch ...
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