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《Orexin-B對大鼠丘腦底核神經(jīng)元自發(fā)放電及運動行為影響 優(yōu)先出版.pdf》由會員上傳分享,免費在線閱讀,更多相關內(nèi)容在學術論文-天天文庫。
1、第53卷第1期Vol.53,No.1青島大學醫(yī)學院學報2017年2月ACTAACADEMIAEMEDICINAEQINGDAOUNIVERSITATISFebruary2017doi:10.13361/j.qdyxy.201701008Orexin-B對大鼠丘腦底核神經(jīng)元自發(fā)放電及運動行為影響盛晴,薛雁,刁匯玲,陳蕾(青島大學醫(yī)學部基礎醫(yī)學院生理學教研室,山東青島266071)[摘要]目的探討orexin-B對正常大鼠丘腦底核神經(jīng)元自發(fā)放電及運動行為的影響。方法應用在體電生理細胞外記錄的方法觀察o
2、rexin-B對大鼠丘腦底核神經(jīng)元自發(fā)放電頻率的影響,并采用提升軀體搖擺實驗(EBST)觀察丘腦底核微量注射orexin-B后大鼠運動行為隨時間變化。結果大鼠丘腦底核微壓力注射orexin-B,神經(jīng)元放電頻率平均升高(96.85±17.42)%(t=10.242,P<0.01),與生理鹽水對照組的細胞反應百分數(shù)比較差異有極顯著性(Z=-4.157,P<0.01)。EBST結果顯示,單側丘腦底核微量注射orexin-B引起大鼠向對側搖擺,兩組在觀察的30、45s向對側偏轉的頻率比較,差異有顯著性(F
3、=80.35,t=13.42、21.54,P<0.01)。結論Orexin-B可提高正常大鼠丘腦底核神經(jīng)元興奮性,提示orexin-B可能通過基底神經(jīng)節(jié)間接通路參與大鼠運動行為調控。[關鍵詞]丘腦底核;orexin-B;神經(jīng)肽類;電生理學[中圖分類號]R322.811[文獻標志碼]A[文章編號]1672-4488(2017)01-0025-03EFFECTSOFOREXIN-BONSPONTANEOUSDISCHARGEANDMOTORBEHAVIORINSUBTHALAMICNUCLEUSOFR
4、ATSHENGQing,XUEYan,DIAOHuiling,CHENLei(DepartmentofPhysiology,QingdaoUniversityMedicalCollage,Qingdao266071,China)[ABSTRACT]ObjectiveToinvestigatetheeffectsoforexin-Bonspontaneousdischargeandlocomotivebehaviorinthesub-thalamicnucleusofnormalrats.Metho
5、dsApplyinginvivoelectrophysiologicalextracellularrecordingmethod,theeffectoforexin-Bonthespontaneousdischargefrequencyofratsubthalamicnucleusneuronswasobserved,andadoptingelevatedbodyswingtests(EBST),thechangesofmotorbehaviorinratswithtimeaftermicroin
6、jectionoforexin-Bintothesubthalamicnucleuswereobserved.ResultsAftermicro-pressureinjectionoforexin-Bintoratsubthalamicnucleus,neurondischargeaveragein-creaseof(96.85±17.42)%(t=10.242,P<0.01),comparedwithnormalsalinegroup,thedifferenceinpercentageofcel
7、lre-sponsewassignificant(Z=-4.157,P<0.01).EBSTresultsshowedthatunilateralsubthalamicnucleusmicroinjectionoforexin-Bcausedtheratstoswingtotheoppositesite.Thedifferenceinfrequencyofdeflectiontotheoppositesite-in30and45sofobser-vation-betweenthetwogroups
8、wassignificant(F=80.35;t=13.42,21.54;P<0.01).ConclusionOrexin-Bcanincreasetheexcitabilityofsubthalamicnucleusneuronsinnormalrats,whichsuggeststhatorexin-Binvolvesinregulationofmotorbehaviorinratsthroughindirectpathwayofbasalganglia.[KEYWORDS]s