Abstract
The objective of the present study was to investigate the effect of propargylglycine (PAG), an inhibitor of the CSE-dependent pathway of hydrogensulfide synthesis, on the endotheliumdependent relaxation of aortic smooth muscle (SM) in old rats. It was found a violation of SM relaxation in this group of animals. The average value of its amplitude was 7.5 ± 1.4% compared with 64.9 ± 3.5% in healthy adult rats. PAG significantly improved endothelium-dependent relaxation in old rats, the average value of its amplitude increased from 7.5 ± 1.4% to 44,5 ± 3,2%. This effect was due to suppression of superoxide anion generation by inhibition of xanthineoxidase activity.
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