Nitroglycerin fails to lower blood pressure in redox-dead Cys42Ser PKG1α knock-in mouse.

ABSTRACT:

Background

Although nitroglycerin has remained in clinical use since 1879, the mechanism by which it relaxes blood vessels to lower blood pressure remains incompletely understood. Nitroglycerin undergoes metabolism that generates several reaction products, including oxidants, and this bioactivation process is essential for vasodilation. Protein kinase G (PKG) mediates classic nitric oxide-dependent vasorelaxation, but the 1α isoform is also independently activated by oxidation that involves interprotein disulfide formation within this homodimeric protein complex. We hypothesized that nitroglycerin-induced vasodilation is mediated by disulfide activation of PKG1α.

Methods and results

Treating smooth muscle cells or isolated blood vessels with nitroglycerin caused PKG1α disulf

SUBMITTER: Rudyk O 

PROVIDER: S-EPMC3617728 | biostudies-literature | 2012 Jul

REPOSITORIES: biostudies-literature