New frontiers of inositide-specific phospholipase C in nuclear signalling
AbstractStrong evidence has been obtained during the last 16 years suggesting that phosphoinositides, which are involved in the regulation of a large variety of cellular processes in the cytoplasm and in the plasma membrane, are present within the nucleus. A number of advances has resulted in the discovery that nuclear phosphoinositides and their metabolizing enzymes are deeply involved in cell growth and differentiation. Remarkably, the nuclear inositide metabolism is regulated independently from that present elsewhere in the cell. Even though nuclear inositol lipids generate second messengers such as diacylglycerol and inositol 1,4,5-trisphosphate, it is becoming increasingly clear that in the nucleus polyphosphoinositides may act by themselves to influence functions such as pre-mRNA splicing and chromatin structure. This review aims at highlighting the most significant and up-dated findings about inositol lipid metabolism in the nucleus.
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Copyright (c) 2009 L Cocco, NM Maraldi, FA Manzoli
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