PGC-1α dictates endothelial function through regulation of eNOS expression.

Area of Science:

• Vascular Biology
• Endocrinology
• Cardiovascular Disease

Background:

• Endothelial dysfunction is central to vascular diseases like hypertension.
• Peroxisome proliferator activated receptor gamma, coactivator 1α (PGC-1α) is a key stress-response regulator.

Purpose of the Study:

• To investigate the role of endothelial PGC-1α in vascular function and hypertension.
• To determine the protective mechanisms of endothelial PGC-1α against angiotensin-II-induced dysfunction.

Main Methods:

• Utilized mice with endothelial-specific PGC-1α loss (KO) and gain (TG) of function.
• Induced hypertension using angiotensin-II (ATII) infusion.
• Assessed vascular function, eNOS expression/activity, and ERRα involvement.

Main Results:

• Endothelial PGC-1α was suppressed in ATII-induced hypertension.
• PGC-1α EC KO mice showed heightened sensitivity to ATII-induced hypertension and dysfunction.
• PGC-1α EC TG mice were protected, with PGC-1α promoting eNOS expression and activity via ERRα.

Conclusions:

• Endothelial PGC-1α is protective against hypertension and vascular dysfunction.
• PGC-1α enhances vascular health by increasing nitric oxide bioavailability through ERRα-mediated eNOS induction.