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ID:33988915
大小:6.49 MB
页数:63页
时间:2019-03-03
《外侧隔核ghrelin对大鼠胃运动的调控及机制研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、青岛大学硕士学位论文外侧隔核ghrelin对大鼠胃运动的调控及机制研究姓名:丁明臣申请学位级别:硕士专业:病理学与病理生理学指导教师:徐珞20120529摘要目的:探讨外侧隔核ghrelin对大鼠胃运动的调控及机制。方法:采用核团微量注射、传感器胃内置入及免疫组化研究方法,记录清醒自由活动大鼠胃运动幅度和频率的变化,探讨外侧隔核(1ateralseptalnucleus,LS)微量注射ghrelin及其受体阻断剂(D-Lys3-GHRP一6)对大鼠胃运动的影响,并观察迷走复合体(DVC)内c-Fos的表达,及双侧膈下迷走神经切断后,LS注射ghrelin对大
2、鼠胃运动的影响。结果:①外侧隔核分别注射20nmol、200nmol或2000nmolghrelin6min后,大鼠胃收缩幅度显著增高(PO.05)和收缩频率(P>O.05)均无显著影响;②外侧隔核注射200
3、nmolghrelin90min后,与NS组比较,大鼠迷走复合体内c-Fos表达明显增加(P<0.01);③膈下迷走神经切断后,大鼠胃收缩幅度(KO.05)和收缩频率(尺0.05)显著降低;在膈下迷走神经切断大鼠,与假手术对照组相比,外侧隔核注射200nmolghrelin,胃收缩幅度(尸0.05)和频率(D0.05)无显著改变。结论:Ghrelin在外侧隔核通过作用其受体显著促进大鼠胃运动。Ghrelin在外侧隔核促进胃运动的作用可能下行通过迷走复合体一
4、迷走神经通路实现。硕士研究生:丁明臣(病理生理学)指导教师:徐珞教授关键词:ghrelin;隔核;胃;’运动;大鼠Abstract⋯fillII[11FIIIFIFIIIlY2087515Objective:Toinvestigatetheeffectofghrelininlateralseptalnucleusongastricmotilityinmts,andtoexploreitsunderlyingmechanismincentralnervoussystem.Methods..GhrelinWasmicroinjectedintolateralse
5、ptalnucleusandthegastricmotilityweremeasuredbytransducerandelectrodeembedmentedintothestomachinconsciousrats.Results-①Intheghrelingroup,afterthelateralseptalnucleuswasadministrated20nmol,200nmolor2000nmolghrelinfor6minutesrespectively,theamplitude(尸6、1)ofthegastricmotilitywassignificantlyincreased.AnditWasdose-dependentlyincreased.Compared、析tIlthegroupof200nmolghrelin+NS,theeffectofghrelinonpromotinggastricmotilityincludingtheamplitudes俨<0.05—0.01)andfrequency(尸7、njectedintothelateralseptalnucleus.However,thereWasnosignificantchangeforgastricmotilitywhileadministrationofghrelinreceptorantagonistD-Lys3-GHRP-6alone俨>o.05).②nelateralseptalnucleusinjectionofghrelin200nmolghrelincallsignificantlyinducetheexpressionofe-FosproteininDVC(P8、1egastricmotilityamplitude
6、1)ofthegastricmotilitywassignificantlyincreased.AnditWasdose-dependentlyincreased.Compared、析tIlthegroupof200nmolghrelin+NS,theeffectofghrelinonpromotinggastricmotilityincludingtheamplitudes俨<0.05—0.01)andfrequency(尸7、njectedintothelateralseptalnucleus.However,thereWasnosignificantchangeforgastricmotilitywhileadministrationofghrelinreceptorantagonistD-Lys3-GHRP-6alone俨>o.05).②nelateralseptalnucleusinjectionofghrelin200nmolghrelincallsignificantlyinducetheexpressionofe-FosproteininDVC(P8、1egastricmotilityamplitude
7、njectedintothelateralseptalnucleus.However,thereWasnosignificantchangeforgastricmotilitywhileadministrationofghrelinreceptorantagonistD-Lys3-GHRP-6alone俨>o.05).②nelateralseptalnucleusinjectionofghrelin200nmolghrelincallsignificantlyinducetheexpressionofe-FosproteininDVC(P8、1egastricmotilityamplitude
8、1egastricmotilityamplitude
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