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- W1981993863 abstract "Recent evidence supports the hypothesis that the mechanism by which glyceryl trinitrate induces relaxation of vascular smooth muscle involves the biotransformation of glyceryl trinitrate. This study was conducted to determine if there was a direct correlation between the capacity of vascular smooth muscle preparations to biotransform glyceryl trinitrate and their sensitivity to the relaxant effect of this organic nitrate. Isolated bovine pulmonary arteries and veins were contracted submaximally and cumulative dose-response relationships to glyceryl trinitrate were obtained; the vein was approximately 10 times more sensitive than the artery to glyceryl trinitrate induced relaxation. In a separate series of experiments, these vascular tissues were contracted submaximally and incubated with 0.5 microM [14C]glyceryl trinitrate for 2 min, during which glyceryl trinitrate induced relaxation was monitored. At 2 min, tissue samples were taken for determination of glyceryl trinitrate and glyceryl-1,2- and 1,3-dinitrate content by thin-layer chromatography and liquid scintillation spectrometry. Biotransformation of glyceryl trinitrate to glyceryl dinitrate occurred concomitantly with relaxation of these blood vessels. The concentration of glyceryl dinitrate in the vein was significantly less than that in the artery (p less than or equal to 0.05), even though significantly greater relaxation of the vein than the artery was observed (p less than or equal to 0.05). From these data, a simple linear relationship between glyceryl trinitrate biotransformation and relaxation is not apparent." @default.
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- W1981993863 date "1987-06-01" @default.
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- W1981993863 title "A comparative study of glyceryl trinitrate biotransformation and glyceryl trinitrate induced relaxation in bovine pulmonary artery and vein" @default.
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- W1981993863 doi "https://doi.org/10.1139/y87-181" @default.
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