Wortmannin inhibits platelet aggregation produced by interaction of gamma-aminobutyric acid and the calcium tonophore, A23187
Biological and Biomedical Sciences
Platelet aggregation by gamma-aminobutyric acid (GABA) agonists combined with a calcium ionophore was studied. GABA, baclofen and mucimol markedly amplified aggregatory responses to a subthreshold concentration of the ionophore, A23187. This effect was inhibited by wortmannin, a blocker of phosphoinositide 3-kinase. However, several antagonists of GABA receptors had no effect on the response, and benzodiazepines inhibited aggregation. These results suggest that the GABA effect is not mediated by traditional neuronal GABA receptors. We propose that wortmannin inhibits aggregation at a nexus downstream from membrane mechanisms triggered by the GABA-A23187 interaction.
Research Communications in Molecular Pathology and Pharmacology
Saeed, S. A.,
Connor, J. D.,
Gilani, A. H.,
Ali, S. S.,
Shah, B. H.
(2001). Wortmannin inhibits platelet aggregation produced by interaction of gamma-aminobutyric acid and the calcium tonophore, A23187. Research Communications in Molecular Pathology and Pharmacology, 109(2018-01-02), 87-93.
Available at: https://ecommons.aku.edu/pakistan_fhs_mc_bbs/695