Abstract:The main path of endothelium-dependent relaxation (EDR) in resistance arteries is independent of nitric oxide synthase and cyclooxygenase and is mediated by endothelium-dependent hyperpolarisation (EDH). We tested the effect of ascorbate upon this path in isolated small mesenteric arteries from the rat. EDR was induced by carbachol 10 -5 M, in rings contracted by phenylephrine 10 -5 M or by prostaglandin F2α 10 -5 M, in the presence of L-N()-Nitro arginine methyl ester (l-NAME) 10 -4 M and indomethacin 10 -5 … Show more
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