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- W2010263704 abstract "Type 2 diabetes is associated with many circulatory manifestations, including alteration in endothelial function and hypertension. In this study we investigate the morphology and contractile response as well as the endothelial function of resistance arteries from the spontaneously diabetic Goto-Kakizaki (GK) rat, a model of lean type 2 diabetes expressing glucose intolerance.Isolated mesenteric small arteries were investigated under isometric conditions in a wire myograph system using noradrenaline (NA) and the endothelium-dependent vasorelaxant acetylcholine (ACh). Media thickness was measured and media lumen ratio calculated.No apparent morphological difference was noted between the arteries from GK rats and control Wistar (CW) rats. When exposed to the maximal NA concentration used (30 microM), arteries from GK rats developed significantly more tension than arteries from CW rats. In the presence of indomethacin (a specific blocker of the COX synthase) and of L-NAME (an inhibitor of eNOS), the response to NA was still significantly greater in GK rat arteries. Under control conditions, arteries from both groups showed intact relaxation to ACh. After incubation with indomethacin and L-NAME, both groups showed a non-NO nonprostaglandin-dependent relaxation to ACh. This relaxation could be blocked by a combination of apamin and charybdotoxin.This study shows that mesenteric small arteries from the diabetic GK rat have increased contractile response to NA, along with a normal endothelial function and unaltered morphology." @default.
- W2010263704 created "2016-06-24" @default.
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- W2010263704 date "2008-01-01" @default.
- W2010263704 modified "2023-10-09" @default.
- W2010263704 title "Increased Contractility to Noradrenaline and Normal Endothelial Function in Mesenteric Small Arteries from the Goto-Kakizaki Rat Model of Type 2 Diabetes" @default.
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- W2010263704 doi "https://doi.org/10.2170/physiolsci.rp010108" @default.
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