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Human vascular smooth muscle cells inhibit platelet aggregation when incubated with glyceryl trinitrate: evidence for generation of nitric oxide
Author(s) -
Benjamin Nigel,
Dutton Jane A.E.,
Ritter James M.
Publication year - 1991
Publication title -
british journal of pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.432
H-Index - 211
eISSN - 1476-5381
pISSN - 0007-1188
DOI - 10.1111/j.1476-5381.1991.tb12264.x
Subject(s) - vascular smooth muscle , nitric oxide , chemistry , platelet , platelet aggregation , thromboxane a2 , pharmacology , smooth muscle , biochemistry , medicine , organic chemistry
1 The effect on platelet aggregation of glyceryl trinitrate in the presence of cultured vascular smooth muscle cells was determined turbidometrically. U46619 (a thromboxane mimetic) was used as agonist and experiments were performed in the presence of aspirin. Inorganic nitrite production from glyceryl trinitrate by vascular smooth muscle cells was also measured, to provide an indirect index of nitric oxide synthesis. 2 The combination of vascular smooth muscle cells together with glyceryl trinitrate, at concentrations that had little effect individually, profoundly inhibited platelet aggregation. 3 The inhibitory effect on platelet aggregation of vascular smooth muscle cells together with glyceryl trinitrate was markedly attenuated by haemoglobin, an inhibitor of nitric oxide. 4 These results show that vascular smooth muscle cells inhibit platelet aggregation when exposed to glyceryl trinitrate and suggest that this is due to generation of nitric oxide from glyceryl trinitrate by vascular smooth muscle.