PMID: 8971982Oct 1, 1996Paper

Phosphoinositide signaling in human brain

Progress in Neurobiology
M A Pacheco, R S Jope

Abstract

The phosphoinositide signal transduction system constitutes one of the primary means for intercellular communication in the central nervous system, but only recently has this system been studied in human brain. Although some investigations have studied phosphoinositide signaling in slices from biopsied human brain, due to the limited access to such material a greater number of studies have utilized membranes prepared from postmortem human brain. With membranes exposed to exogenous labeled phosphoinositides, activation of phospholipase C with calcium, with G-proteins stimulated by GTP gamma S or NaF, or with several receptor agonists, have demonstrated that all of the components of the phosphoinositide system are retained in human brain membranes and are responsive to appropriate stimuli. Investigators have begun to examine the effects of neurological (Alzheimer's disease, epilepsy, Parkinson's disease) and psychiatric (schizophrenia, major depression, bipolar affective disorder) diseases on the activity of the phosphoinositide system. Alzheimer's disease has been studied to the greatest extent and a severe deficit in phosphoinositide signaling has been identified in most studies. In addition, brain regionally selective deficits...Continue Reading

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