alexa Phospholipids and nuclear RNA


Journal of Chemical Biology & Therapeutics

Author(s): Albi E, Micheli M, Viola Magni MP

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It has been demonstrated that in hepatocyte nuclei the chromatin phospholipid fraction is localized near the RNA in decondensed chromatin. The aim of the present study was to see if there is any linkage between phospholipids and other nuclear components. Isolated hepatocyte nuclei and nuclear membranes were treated with deoxyribonuclease and ribonuclease. No loss of phospholipids was observed after DNA digestion, whereas 48% was lost following enzymatic RNA removal. This loss of phospholipids, localized either near the membrane or inside the nucleus, was not homogeneous for all phospholipids: phosphatidylserine and sphingomyelin being the most affected. It can be concluded that 48% of nuclear phospholipids, in particular sphingomyelin, is lost with RNA removal. This result is discussed in view of a possible role of phospholipids in DNA synthesis and RNA transcription.

This article was published in Cell Biol Int and referenced in Journal of Chemical Biology & Therapeutics

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