PGC-1alpha dictates endothelial function through regulation of eNOS expression

Endothelial dysfunction is a characteristic of many vascular related diseases such as hypertension. Peroxisome proliferator activated receptor gamma, coactivator 1alpha (PGC-1alpha) is a unique stress sensor that largely acts to promote adaptive responses. Therefore, we sought to define the role of endothelial PGC-1alpha in vascular function using mice with endothelial specific loss of function (PGC-1alpha EC KO) and endothelial specific gain of function (PGC-1alpha EC TG). Here we report that endothelial PGC-1alpha is suppressed in angiotensin-II (ATII)-induced hypertension. Deletion of endothelial PGC-1alpha sensitized mice to endothelial dysfunction and hypertension in response to ATII, whereas PGC-1alpha EC TG mice were protected. Mechanistically, PGC-1alpha promotes eNOS expression and activity, which is necessary for protection from ATII-induced dysfunction as mice either treated with an eNOS inhibitor (LNAME) or lacking eNOS were no longer responsive to transgenic endothelial PGC-1alpha expression. Finally, we determined that the orphan nuclear receptor, estrogen related receptor alpha (ERRalpha) is required to coordinate the PGC-1alpha -induced eNOS expression. In conclusion, endothelial PGC-1alpha expression protects from vascular dysfunction by promoting NO* bioactivity through ERRalpha induced expression of eNOS

Progress Report of the World Data Center for Seismology, Beijing

This paper presents in detail the project "Development and Service of World Data Center for Seismology, Beijing," including its background, construction tasks, main results, societal effects, and perspective for future development