eLife Assessment
The manuscript presents valuable data suggesting that enalapril elevates pSmad1/5/9 signaling, reduces cellular senescence, and enhances physiological functions in aged mice. However, the in vivo evidence remains incomplete, as studies blocking pSmad1/5/9 or using NAC to negate enalapril's purported benefits are lacking, and no lifespan extension data are shown. While in vitro findings support Smad1/5/9 as a key mediator, additional experiments - including BMP receptor inhibition and comprehensive senescence markers - are necessary to validate its essential role in vivo. Overall, the study provides promising insights into enalapril's anti-senescence potential but requires further rigorous investigation to fully substantiate its mechanism and therapeutic impact.