Health benefits attributed to 17α-estradiol, a lifespan-extending compound, are mediated through estrogen receptor α

Metabolic dysfunction underlies several chronic diseases, many of which are exacerbated by obesity. Dietary interventions can reverse metabolic declines and slow aging, although compliance issues remain paramount. 17-estradiol treatment improves metabolic parameters and slows aging in male mice. The mechanisms by which 17-estradiol elicits these benefits remain unresolved. Herein, we show that 17-estradiol elicits similar genomic binding and transcriptional activation through estrogen receptor (ER) to that of 17{beta}-estradiol. In addition, we show that the ablation of ER completely attenuates the beneficial metabolic effects of 17-E2 in male mice. Our findings suggest that 17-E2 acts primarily through the liver and hypothalamus to improve metabolic parameters in male mice. Lastly, we also determined that 17-E2 improves metabolic parameters in male rats, thereby proving that the beneficial effects of 17-E2 are not limited to mice. Collectively, these studies suggest ER may be a drug target for mitigating chronic diseases in male mammals.