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- W2045643541 abstract "In the current study, Cu2+ was tested for its ability to relax vessels and to accumulate cyclic GMP (cGMP) in rat pulmonary artery employing rat extrapulmonary arterial rings. Cu(2+)-induced relaxation was endothelium and concentration (in the range from 10(-7) to 10(-4) M) dependent. The content of cGMP in the rings was increased 1.7-fold with 10(-4) M Cu2+. NG-Monomethyl-L-arginine abolished both the copper-induced relaxation and the increase in cGMP of rings. Cu2+ and zaprinast, which inhibits phosphodiesterase activity, caused a synergistic increase in cGMP level in the rings, suggesting that Cu2+ enhanced cGMP level through a mechanism different from that of zaprinast, probably as a consequence of elevated accumulation of nitric oxide (NO). The magnitude of vasorelaxation observed due to simultaneous addition of Cu2+ and acetylcholine was additive, not synergistic. Cu2+ did not augment relaxation induced by exogenously added NO donor. These results suggest that Cu2+ elevates NO level in the rings not by prolonging the half-life of NO, but by activation of endothelial nitric oxide synthase and subsequently potentiating the action of NO on vascular tone." @default.
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- W2045643541 date "1997-01-01" @default.
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- W2045643541 title "The effect of Cu2+ on rat pulmonary arterial rings" @default.
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- W2045643541 doi "https://doi.org/10.1016/s0014-2999(96)00833-3" @default.
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