{"title":"Phospholipases involved in lysophosphatidylinositol metabolism in rat brain","authors":"Tetsuyuki Kobayashi, Masaaki Kishimoto, Harumi Okuyama","doi":"10.1016/0929-7855(96)01505-2","DOIUrl":null,"url":null,"abstract":"<div><p>A phospholipase C activity highly specific for lysophosphoinositide (lysoPI-PLC) has been demonstrated to be present in synaptic plasma membranes of the rat brain. Several lines of evidence suggested that the lysoPI-PLC is an enzyme distinct from known isoforms of phosphoinositide-specific phospholipase C (PI-PLC). On the other hand, the occurrence of a Ca<sup>2+</sup>-independent phospholipase A<sub>1</sub> hydrolyzing PI in rat brain was also demonstrated. The lysoPI-PLC hydrolyzed the 2-acyl isomer as well as the 1-acyl isomer of lysoPI. These findings suggest possible pathways for PI metabolism through lysoPI to yield monoacylglycerol (mainly 2-arachidonoyl glycerol) and inositolphosphates in the brain, which are different from the well-characterized PI-PLC pathway.</p></div>","PeriodicalId":79347,"journal":{"name":"Journal of lipid mediators and cell signalling","volume":"14 1","pages":"Pages 33-37"},"PeriodicalIF":0.0000,"publicationDate":"1996-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0929-7855(96)01505-2","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of lipid mediators and cell signalling","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0929785596015052","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 10
Abstract
A phospholipase C activity highly specific for lysophosphoinositide (lysoPI-PLC) has been demonstrated to be present in synaptic plasma membranes of the rat brain. Several lines of evidence suggested that the lysoPI-PLC is an enzyme distinct from known isoforms of phosphoinositide-specific phospholipase C (PI-PLC). On the other hand, the occurrence of a Ca2+-independent phospholipase A1 hydrolyzing PI in rat brain was also demonstrated. The lysoPI-PLC hydrolyzed the 2-acyl isomer as well as the 1-acyl isomer of lysoPI. These findings suggest possible pathways for PI metabolism through lysoPI to yield monoacylglycerol (mainly 2-arachidonoyl glycerol) and inositolphosphates in the brain, which are different from the well-characterized PI-PLC pathway.
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