Figure 2From: Testosterone-derived estradiol production by male endothelium is robust and dependent on p450 aromatase via estrogen receptor alphaDihydrotestosterone (DHT) treatment down regulates P450 aromatase expression and protein levels, and reduces estradiol production from murine ERα +/+ and ERα −/− male aortic endothelial cells. Aortic endothelial cells isolated from male ERα +/+ and ERα −/− mice were treated with DHT (1 nM or 1 uM) for 48 hours. Following treatment, total RNA was isolated and used for qRT-PCR analysis of expression of the P450 aromatase gene. Gene expression levels were normalized to GAPDH and expressed as percent change compared to control (panels A and B). To ascertain the amplification and integrity of the resulting qRT-PCR products, the products were separated on a 2% agarose gel (inset, top panel: P450 aromatase and bottom panel: GAPDH). Cell supernatants were collected following treatment and used for ELISA analysis of estradiol release (panels C and D). Results are expressed as means ± SEM. ** p < 0.01 and * p < 0.05 compared to vehicle control.Back to article page