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- W2560608781 abstract "The vasodilator response of nitric oxide (NO), hydrogen sulfide (H2S) and sulfur dioxide (SO2) were studied todetermine the significance of the actions and interactions of these gasotransmitters for controlling aortic tone in rats. The isometric tension of five separate sets of experiments was recorded. Sodium nitroprusside (SNP; NO donor), sodium disulphide (Na2S; H2S donor), SO2 derivatives and their paired combinations were added to phenylephrine (PE)-induced contraction during the peak value. Then maximal relaxation rate was calculated four times at 5 min intervals. Tetraethylammonium (TEA) and Glibenclamide (GLIB) were applied for investigating the molecular mechanism of the gasses. While, in a separate set of experiments, we used either L-Arginine (L-Arg), L-Cysteine (L-Cyst) or L-nitroarginine methyl ester (L-NAME) before applying gasotransmitters. Highest and prolonged relaxation rate were recorded when SNP was combined with SO2. The combination of Na2S and SO2-induced vasorelaxation was blocked by TEA and GLIB pretreatments. L-Cyst decreased relaxation compared to SNP and vice versa to SO2 induced vasorelaxation. L-Arg markedly attenuated relaxation responses of Na2S and SO2 derivatives. Also, L-NAME delayed relaxation compared to Na2S and SO2. These results suggest that exogenous paired combinations of H2S, NO and SO2 will enhance and elongate the rate of aortic relaxation. Meanwhile, preincubation of aortic rings with precursors attenuate the dilatory effects of exogenous studied gases." @default.
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- W2560608781 date "2016-06-01" @default.
- W2560608781 modified "2023-09-25" @default.
- W2560608781 title "Vasodilatory effects of nitric oxide, hydrogen sulfide and sulfur dioxide in rats: Time-dependent interaction study" @default.
- W2560608781 doi "https://doi.org/10.22059/pbs.2016.59004" @default.
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