{"title":"肽多溴三烯LTD4对大鼠系膜细胞内钙的作用。","authors":"M Ochsner","doi":"10.1007/BF01938870","DOIUrl":null,"url":null,"abstract":"<p><p>The dose-dependent effect of CGP 45715A on the LTD4-induced Ca2+ response of glomerular mesangial cells has been studied. Our results demonstrate that the LTD4-dependent increase in the cytosolic Ca2+ concentration primarily involves an InsP3-mediated release of Ca2+ from intracellular storage sites and to a minor extent an enhanced influx of Ca2+ through receptor-operated Ca2+ channels located in the plasma membrane. The action of CGP 45715A on the Ca2+ response is an inhibitory one and is convincingly explained by a displacement of LTD4 from its receptor site(s). The contractile effect of LTD4 on pulmonary smooth muscle is proposed to be mainly caused by a receptor-mediated hydrolysis of phosphatidylinositol-4,5-bisphosphate.</p>","PeriodicalId":12087,"journal":{"name":"Experientia","volume":"52 9","pages":"856-64"},"PeriodicalIF":0.0000,"publicationDate":"1996-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF01938870","citationCount":"2","resultStr":"{\"title\":\"The action of the peptidoleukotriene LTD4 on intracellular calcium in rat mesangial cells.\",\"authors\":\"M Ochsner\",\"doi\":\"10.1007/BF01938870\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The dose-dependent effect of CGP 45715A on the LTD4-induced Ca2+ response of glomerular mesangial cells has been studied. Our results demonstrate that the LTD4-dependent increase in the cytosolic Ca2+ concentration primarily involves an InsP3-mediated release of Ca2+ from intracellular storage sites and to a minor extent an enhanced influx of Ca2+ through receptor-operated Ca2+ channels located in the plasma membrane. The action of CGP 45715A on the Ca2+ response is an inhibitory one and is convincingly explained by a displacement of LTD4 from its receptor site(s). The contractile effect of LTD4 on pulmonary smooth muscle is proposed to be mainly caused by a receptor-mediated hydrolysis of phosphatidylinositol-4,5-bisphosphate.</p>\",\"PeriodicalId\":12087,\"journal\":{\"name\":\"Experientia\",\"volume\":\"52 9\",\"pages\":\"856-64\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1996-09-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1007/BF01938870\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Experientia\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1007/BF01938870\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Experientia","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1007/BF01938870","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The action of the peptidoleukotriene LTD4 on intracellular calcium in rat mesangial cells.
The dose-dependent effect of CGP 45715A on the LTD4-induced Ca2+ response of glomerular mesangial cells has been studied. Our results demonstrate that the LTD4-dependent increase in the cytosolic Ca2+ concentration primarily involves an InsP3-mediated release of Ca2+ from intracellular storage sites and to a minor extent an enhanced influx of Ca2+ through receptor-operated Ca2+ channels located in the plasma membrane. The action of CGP 45715A on the Ca2+ response is an inhibitory one and is convincingly explained by a displacement of LTD4 from its receptor site(s). The contractile effect of LTD4 on pulmonary smooth muscle is proposed to be mainly caused by a receptor-mediated hydrolysis of phosphatidylinositol-4,5-bisphosphate.
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