Add time:08/09/2019         Source:sciencedirect.com

Possible involvement of endothelium was examined in the vasorelaxation of rat aorta in response to NIP-121 ((+)-7,8-dihydro-6,6-dimethyl-7-hyroxy-8-(2-oxo-1-piperidinyl)-6H-pyrano[2,3-f]benz-2,1,3-oxadiazole), an ATP-sensitive K+ (KATP) channel opener. The NIP-121-induced vasorelaxation was greater in endothelium-intact preparations than in endothelium-denuded ones. In the presence of glibenclamide, which inhibits KATP channels, NIP-121-induced vasorelaxations were of a similar extent in both endothelium-intact and -denuded preparations. These findings suggest that the presence of endothelium plays a role in the vasorelaxation in response to KATP channel openers.

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