{"title":"在小鼠成骨细胞MC3T3-E1中,磷脂酶D1活性对于胞浆磷脂酶A2依赖性前列腺素E2的形成至关重要","authors":"Hans Jörg Leis , Werner Windischhofer","doi":"10.1016/j.plefa.2023.102592","DOIUrl":null,"url":null,"abstract":"<div><p>In bone, prostaglandin E<sub>2</sub> (PGE<sub>2</sub>) is highly osteogenic and formed by osteoblasts, a key modulatory event in the regulation of bone cell activity. MC3T3-E1 cells are widely used as an in vitro model of osteoblast function. It is still not clear which pathways contribute to the release of AA in these cells. In this study we have focussed on the contribution of phospholipase D (PLD) enzymes to osteoblastic PGE<sub>2</sub> formation after stimulation with endothelin-1 (ET-1). Using specific inhibitors of PLD1 and PLD2 we could show that PGE<sub>2</sub> formation was strictly dependent on PLD1 but not PLD2 activity and cytosolic phospholipase A<sub>2</sub> (cPLA<sub>2</sub>) was activated by triggering through PLD1. We have identified diacyl glycerol (DAG) as a possible effector molecule which may serve as a triggering signal for PKC activation and subsequent cPLA<sub>2</sub> phosphorylation.</p></div>","PeriodicalId":94179,"journal":{"name":"Prostaglandins, leukotrienes, and essential fatty acids","volume":null,"pages":null},"PeriodicalIF":3.0000,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0952327823000613/pdfft?md5=782794284ac1a31b14b69afcd1bc5318&pid=1-s2.0-S0952327823000613-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Phospholipase D1 activity is crucial for cytosolic phospholipase A2 –dependent prostaglandin E2 formation in murine osteoblastic MC3T3-E1 cells\",\"authors\":\"Hans Jörg Leis , Werner Windischhofer\",\"doi\":\"10.1016/j.plefa.2023.102592\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In bone, prostaglandin E<sub>2</sub> (PGE<sub>2</sub>) is highly osteogenic and formed by osteoblasts, a key modulatory event in the regulation of bone cell activity. MC3T3-E1 cells are widely used as an in vitro model of osteoblast function. It is still not clear which pathways contribute to the release of AA in these cells. In this study we have focussed on the contribution of phospholipase D (PLD) enzymes to osteoblastic PGE<sub>2</sub> formation after stimulation with endothelin-1 (ET-1). Using specific inhibitors of PLD1 and PLD2 we could show that PGE<sub>2</sub> formation was strictly dependent on PLD1 but not PLD2 activity and cytosolic phospholipase A<sub>2</sub> (cPLA<sub>2</sub>) was activated by triggering through PLD1. We have identified diacyl glycerol (DAG) as a possible effector molecule which may serve as a triggering signal for PKC activation and subsequent cPLA<sub>2</sub> phosphorylation.</p></div>\",\"PeriodicalId\":94179,\"journal\":{\"name\":\"Prostaglandins, leukotrienes, and essential fatty acids\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.0000,\"publicationDate\":\"2023-10-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0952327823000613/pdfft?md5=782794284ac1a31b14b69afcd1bc5318&pid=1-s2.0-S0952327823000613-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Prostaglandins, leukotrienes, and essential fatty acids\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0952327823000613\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Prostaglandins, leukotrienes, and essential fatty acids","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0952327823000613","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Phospholipase D1 activity is crucial for cytosolic phospholipase A2 –dependent prostaglandin E2 formation in murine osteoblastic MC3T3-E1 cells
In bone, prostaglandin E2 (PGE2) is highly osteogenic and formed by osteoblasts, a key modulatory event in the regulation of bone cell activity. MC3T3-E1 cells are widely used as an in vitro model of osteoblast function. It is still not clear which pathways contribute to the release of AA in these cells. In this study we have focussed on the contribution of phospholipase D (PLD) enzymes to osteoblastic PGE2 formation after stimulation with endothelin-1 (ET-1). Using specific inhibitors of PLD1 and PLD2 we could show that PGE2 formation was strictly dependent on PLD1 but not PLD2 activity and cytosolic phospholipase A2 (cPLA2) was activated by triggering through PLD1. We have identified diacyl glycerol (DAG) as a possible effector molecule which may serve as a triggering signal for PKC activation and subsequent cPLA2 phosphorylation.