Elevated platelet membrane phosphatidylinositol-4,5-bisphosphate in bipolar mania

Abstract
Membrane phospholipids were measured in platelets of seven medication-free patients in the manic phase of bipolar affective disorder and seven healthy comparison subjects. The relative percentage of platelet membrane phosphatidylinositol-4,5-bisphosphate was significantly higher in the manic patients than in the comparison subjects. These results are consistent with an enhanced neuronal second messenger response after 5-hydroxytryptamine receptor stimulation followed by neurotransmitter release.