Peng Xiang, Mingjun Qiu, Zeli Du, Manling Chen, Zhaofeng Wu
{"title":"胆囊收缩素八肽对大鼠大脑皮层神经细胞PKC活性的影响。","authors":"Peng Xiang, Mingjun Qiu, Zeli Du, Manling Chen, Zhaofeng Wu","doi":"","DOIUrl":null,"url":null,"abstract":"<p><strong>Objective: </strong>To investigate the effects of CCK8 on protein kinase C activity in rat cerebral cortex.</p><p><strong>Methods: </strong>The cerebral cortex neurocytes were isolated and used as a model. The effects of CCK8, L-364, 718 and L-365, 260 on PKC activities were detected by using a non-radioactive method.</p><p><strong>Results: </strong>CCK8 caused a detectable increase in PKC activity at 10(-11) mol/L, and a peak increase of PKC activity was observed at 10(-5) mol/L (about 4.5 U/mg protein). PKC activity was increased in dose-dependent manner by CCK8(10(-11)-10(-6) mol/L). The CCKB-selective receptor antagonist L-365, 260 with a higher efficiency, and the CCKA-selective receptor antagonist L-364, 718 with a lower efficiency were able to block a maximal effect of CCK8-induced PKC activation.</p><p><strong>Conclusions: </strong>CCK8 may regulate PKC activities in rat cerebral cortex through CCKB receptor.</p>","PeriodicalId":13173,"journal":{"name":"Hua xi yi ke da xue xue bao = Journal of West China University of Medical Sciences = Huaxi yike daxue xuebao","volume":"33 1","pages":"72-4, 120"},"PeriodicalIF":0.0000,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"[The effects of cholecystokinin octapeptide on PKC activity in rat cerebral cortex neurocytes].\",\"authors\":\"Peng Xiang, Mingjun Qiu, Zeli Du, Manling Chen, Zhaofeng Wu\",\"doi\":\"\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Objective: </strong>To investigate the effects of CCK8 on protein kinase C activity in rat cerebral cortex.</p><p><strong>Methods: </strong>The cerebral cortex neurocytes were isolated and used as a model. The effects of CCK8, L-364, 718 and L-365, 260 on PKC activities were detected by using a non-radioactive method.</p><p><strong>Results: </strong>CCK8 caused a detectable increase in PKC activity at 10(-11) mol/L, and a peak increase of PKC activity was observed at 10(-5) mol/L (about 4.5 U/mg protein). PKC activity was increased in dose-dependent manner by CCK8(10(-11)-10(-6) mol/L). The CCKB-selective receptor antagonist L-365, 260 with a higher efficiency, and the CCKA-selective receptor antagonist L-364, 718 with a lower efficiency were able to block a maximal effect of CCK8-induced PKC activation.</p><p><strong>Conclusions: </strong>CCK8 may regulate PKC activities in rat cerebral cortex through CCKB receptor.</p>\",\"PeriodicalId\":13173,\"journal\":{\"name\":\"Hua xi yi ke da xue xue bao = Journal of West China University of Medical Sciences = Huaxi yike daxue xuebao\",\"volume\":\"33 1\",\"pages\":\"72-4, 120\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2002-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Hua xi yi ke da xue xue bao = Journal of West China University of Medical Sciences = Huaxi yike daxue xuebao\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Hua xi yi ke da xue xue bao = Journal of West China University of Medical Sciences = Huaxi yike daxue xuebao","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
[The effects of cholecystokinin octapeptide on PKC activity in rat cerebral cortex neurocytes].
Objective: To investigate the effects of CCK8 on protein kinase C activity in rat cerebral cortex.
Methods: The cerebral cortex neurocytes were isolated and used as a model. The effects of CCK8, L-364, 718 and L-365, 260 on PKC activities were detected by using a non-radioactive method.
Results: CCK8 caused a detectable increase in PKC activity at 10(-11) mol/L, and a peak increase of PKC activity was observed at 10(-5) mol/L (about 4.5 U/mg protein). PKC activity was increased in dose-dependent manner by CCK8(10(-11)-10(-6) mol/L). The CCKB-selective receptor antagonist L-365, 260 with a higher efficiency, and the CCKA-selective receptor antagonist L-364, 718 with a lower efficiency were able to block a maximal effect of CCK8-induced PKC activation.
Conclusions: CCK8 may regulate PKC activities in rat cerebral cortex through CCKB receptor.
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