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July 2020

Life Sci. 1995 ; 57(13): 1309-15.

Endothelium-dependent vasorelaxant effect of trilinolein: mediated by nitric oxide and cyclic GMP.

Hong CY, Lai LJ, Huang YT.

Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC.

At concentrations ranged from 0.1 nM to 1 microM, trilinolein concentration-dependently relaxed the phenylephrine-induced constriction of isolated rat aorta. Concentration-response curves for the interaction between trilinolein and phenylephrine showed that trilinolein was unlikely a competitive antagonist of phenylephrine. The vasorelaxant effect of trilinolein was dependent on the presence of intact endothelium. Both NG-nitro-L-arginine methyl ester and methylene blue antagonized this vasorelaxant effect. L-arginine partially reversed the effect of L-NAME on trilinolein. Linoleic acid had no vasorelaxant effect. We concluded that trilinolein is an endothelium dependent vasorelaxant and the underlying mechanism could be a stimulation of the nitric oxide and cyclic GMP pathway.

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