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Phosphoinositide hydrolysis linked 5-HT2 receptors in fibroblasts from choroid plexus
E L Barker1, K D Burris, E Sanders-Bush
1Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, TN 37232.
Brain Research
|June 28, 1991
Abstract:
A serotonin (5-HT)-mediated phosphoinositide hydrolysis response was characterized in fibroblasts cultured from rabbit choroid plexus. 5-HT elicited a maximum 8-fold increase in [3H]inositol-phosphate ([3H]IP) formation, while the partial agonists, (+)-lysergic acid diethylamide and (-)-1-(4-bromo-2,5-dimethyoxyphenyl)-2-aminopropane caused 2- and 5-fold increases, respectively. Mianserin, ketanserin, and spiperone were equipotent at blocking the 5-HT-mediated response. Thus, agonist and antagonist profiles indicate interactions with 5-HT2 receptors.