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- W2094566947 abstract "The vasorelaxant effects of acetate in arginine vasopressin (AVP)-contracted rat tail artery strips were examined in order to study mechanism of action. Dose-dependent relaxation by acetate was found in the clinically important range of 4 to 16 mM. Relaxation was not due to complexing of ionized calcium, persisted after mechanical removal of the endothelium, and was not altered by pretreatment with indomethacin. Although acetate also inhibited contraction by alpha-1 and alpha-2 agonists, the relaxant effect was not altered by destruction of sympathetic nerve terminals using 6-hydroxydopamine. The degree of relaxation in this model by various anions correlated with their lyotropic properties; however, the vasorelaxant effect of acetate exceeded that which would be expected on the basis of its position in the lyotropic series. The vasorelaxant effect of acetate was shared by other short-chain fatty acids that can be conjugated with coenzyme A (CoA), such as propionate and malonate. In contrast, a much lesser or absent relaxant effect was found with nonfatty-acid precursors of acetyl CoA, such as pyruvate, lactate, and alanine. The vasorelaxant effect of acetate was abolished by pretreatment with DIDS, an inhibitor of organic anion uptake, suggesting that cellular uptake of acetate is essential to its vasorelaxant action. The results suggest that the relaxant effect of acetate in vascular smooth muscle is non-specific, is not mediated by prostaglandins, does not depend upon the presence of either endothelium or the sympathetic nervous system, and may be due to metabolism of acetate to acetyl CoA with attendant conversion of ATP to AMP." @default.
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- W2094566947 date "1987-07-01" @default.
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- W2094566947 title "Acetate relaxation of isolated vascular smooth muscle" @default.
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- W2094566947 doi "https://doi.org/10.1038/ki.1987.169" @default.
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