Protection of endothelial cells against Ang II-induced impairment: Involvement of both PPARα and PPARγ via PI3K/Akt pathway.

The aim of our study is to explore the involvement of PPARα and PPARγ in Ang II-induced endothelial injury. We found that Ang II significantly elevated the oxidative stress in HUVECs, causing apoptosis and cellular impairment in a time-dependent pattern. Activation of either PPARα by docosahexaenoic acid (DHA) or PPARγ by rosiglitazone protected the endothelial cells. Interestingly, a more significant effect was observed when DHA and rosiglitazone were administrated together. Moreover, we found that this protection was mediated through the PI3K/Akt pathway. Our study may help to understand the mechanism of endothelial dysfunction, contributing to the treatment of hypertension and other endothelial-related diseases.