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Serotonin (5-hydroxytryptamine; 5-HT) plays important roles in the cardiovascular system; however, the relationship between 5-HT-induced vasocontraction and the arterial 5-HT system including metabolism and signal transduction, in the presence of chronic type 2 diabetes (T2D) remains unclear. Therefore, we investigated 5-HT-induced contraction and associated mechanisms in carotid arteries from chronic...
Endothelin-1 (1-31) [ET-1 (1-31)], a novel member of the ET family, comprises 31 amino acids and is derived from the selective hydrolysis of big ET-1 by chymase. Although ET-1 (1-31) reportedly exerts biological effects by direct or indirect [via its conversion to ET-1 (1-21)] mechanisms, it is unclear whether in diabetes the vascular effects of ET-1 (1-31) display gender differences. We investigated...
We investigated the influence of streptozotocin-induced diabetes on the responsiveness of the rat basilar artery to endothelin-1 (ET-1) and nitric oxide (NO), which is known to counteract ET-1. In basilar arteries isolated from diabetic rats: (a) the ET-1-induced contraction was enhanced, (b) the contraction induced by N G -nitro-l-arginine [a nitric oxide synthase (NOS) inhibitor] was weaker,...
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