Phospholipase C (PLC) (PLC)

Phospholipase C (PLC) is a family of enzymes that play a pivotal role in cellular signal transduction by catalyzing the hydrolysis of the membrane phospholipid phosphatidylinositol 4,5-bisphosphate (PIP2) (Source: StatPearls, "Physiology, Phospholipase C"). This enzymatic activity generates two essential second messengers: inositol 1,4,5-trisphosphate (IP3), which mobilizes calcium from intracellular stores, and diacylglycerol (DAG), which activates protein kinase C (PKC) (Source: UniProt, "1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase"). The PLC pathway is activated by a variety of extracellular stimuli through G protein-coupled receptors (GPCRs) and receptor tyrosine kinases (RTKs), making it a central hub for regulating cell growth, differentiation, and metabolism (Source: PubMed, PMC2845218). Dysregulation of PLC signaling is implicated in several diseases, including various cancers where PLC-gamma1 promotes tumor progression, and cardiovascular disorders where PLC-beta influences vascular smooth muscle contraction (Source: PubMed, PMID: 22503560). While PLC enzymes are attractive therapeutic targets, the development of effective drugs has been hindered by the challenge of achieving isoform specificity and the risk of broad systemic toxicity due to the pathway's fundamental biological importance (Source: PubMed, PMID: 17635130).

Other names

Phosphoinositide phospholipase CPI-PLCPhosphatidylinositol-specific phospholipase CPLC signaling cascadePhospholipase C pathway

Inhibition of the hydrolysis of phosphatidylinositol 4,5-bisphosphate (PIP2) to prevent the formation of second messengers IP3 and DAG.