Abstract
Phospholipase C (PLC) is a key enzyme in phosphoinositide turnover, and in the regulation of various cellular events. Among the 13 PLC isozymes, PLCδ1 and PLCδ3 share a high sequence homology, and similar tissue distribution. Recent studies with genetically manipulated mice have clarified the importance of these PLC isozymes in a number of tissues. PLCδ1 is required for maintenance of homeostasis in skin and metabolic tissues, while PLCδ3 regulates microvilli formation in enterocytes and the radial migration of neurons in the cerebral cortex of the developing brain. Furthermore, simultaneous loss of PLCδ1 and PLCδ3 in mice causes placental vascular defects, leading to embryonic lethality. Taken together, PLCδ1 and PLCδ3 have unique and redundant roles in various tissues.
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