Journal
BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR AND CELL BIOLOGY OF LIPIDS
Volume 1761, Issue 5-6, Pages 560-569Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.bbalip.2006.03.002
Keywords
phosphatidylinositol 4,5-bisphopshate; phospholipase C; diacylglycerol; cell cycle; chromatin remodeling; nuclear speckle
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Over the last decades, evidence has accumulated suggesting that there is a distinct nuclear phosphatidylinositol pathway. One of the best examined nuclear lipid pathways is the hydrolysis of phosphatidylinositol 4,5-bisphosphate (PI4,5P(2)) by PLC resulting in activation of nuclear PKC and production of inositol polyphosphates. However, there is a growing number of data that phosphomositides are not only precursor for soluble mositol phosphates and diacylglycerol, instead they can act as second messengers themselves. They have been implicated to play a role in different important nuclear signaling events such as cell cycle progression, apoptosis, chromatin remodeling, transcriptional regulation and mRNA processing. This review focuses on the role of specifically PI4,5P(2) in the nucleus as a second messenger as well as a precursor for P13,4,5P3, inositol polyphosphates and diacylglycerol. (c) 2006 Elsevier B.V All rights reserved.
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