Feb 15, 1995

Homologous and heterologous regulation of receptor-stimulated phosphoinositide hydrolysis

European Journal of Pharmacology
S K Fisher

Abstract

Signal transduction at a diverse range of pharmacologically distinct receptors is effected by the enhanced turnover of inositol phospholipids, with the attendant formation of inositol 1,4,5-trisphosphate and diacylglycerol. Although considerable progress has been made in recent years towards the identification and characterization of the individual components of this pathway, much less is known of mechanisms that may underlie its regulation. In this review, evidence is presented for the potential regulation of inositol lipid turnover at the level of receptor, phosphoinositide-specific phospholipase C and substrate availability in response to either homologous or heterologous stimuli. Available data indicate that the extent of receptor-stimulated inositol lipid hydrolysis is regulated by multiple mechanisms that operate at different levels of the signal transduction pathway.

Mentioned in this Paper

Biochemical Pathway
Phosphatidylinositols
Phosphoric diester hydrolase
Hormone Receptors, Cell Surface
Receptor Down-Regulation
Signal Transduction Pathways
Phospholipase C
Biochemical Turnover
Lipids
1,2-diacylglycerol

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