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1、重組人促紅細胞生成素對兔脊髓缺血/再灌注損傷的作用論文徐能蔣富貴朱立帆楊惠林朱曉東【摘要】目的探討重組人促紅細胞生成素(rHuEPO)對兔脊髓神經(jīng)細胞缺血/再灌注損傷的作用及其可能的作用機制。方法40只健康成年新西蘭大白兔隨機分為4組:假手術(shù)組(A組),對照組(B組),小劑量(1000U/kg)rHuEPO組(C組),大劑量(3000U/kg)rHuEPO組(D組),每組10只。建立兔脊髓缺血/再灌注損傷模型,通過兔耳緣靜脈B組注射生理鹽水3ml/kg,C、D組注射相應劑量rHuEPO。分別于缺血/再灌注
2、損傷后4h、8h、24h、48h、7d對動物進行后肢運動神經(jīng)功能評分。7d時處死動物,取L3~5節(jié)段脊髓組織行病理學檢查.freelanerythropoietin(rHuEPO)treatmentonspinalcordischemia/reperfusioninjuryandtoexploreitspossiblemechanism.MethodFortyhealthyadultNelydividedinto4groups(n=10each):ShamGroup(GroupA),controlgrou
3、p(GroupB),SmallDose(1000U/kg)rHuEPOgroup(GroupC),LargeDose(rHuEPO3000U/kg)group(GroupD).Thespinalcordischemia-reperfusionmodelofrabbitspingtheinfrarenalaortaofrabbitsfor30minutesbeforereleasingforreperfusion.3ml/kgofnormalsalineinGroupBandthesamedoseofrHu
4、EPOinGroupsCandDinistratedviarabbitauricularveinsrespectivelyexceptforGroupA.Follootornervefunctionsinthehindlimbsedatthetimesof4h,8h,24h,48hand7d.On7d,theanimalsovedforhistopathologicexaminations,includinghematoxylinandeosinstainingforpathologicalchanges
5、andthevariationsintheamountofmotorneuronsofthespinalanteriorhorn.TUNELployedtodeterminetheapoptosisofmotorneuronsofthespinalanteriorhorn.ResultsAteachtimepointafterI/Rinjury,thevaluesofmotornervefunctionofhindlimbsineachrHuEPOgroupGroup(P0.01).4hand7dafte
6、rinjury,thevaluesatoxylinandeosinstainingrevealedamarkedlylessserioushistopathologicalchangeofthespinalcordingroupsCandDthaninGroupB,butoreseriousthaninGroupA;thespinalanteriorhornneuroncountsingroupsCandDotorneuronsingroupsCandDarkedlyloayhaveanti-apopto
7、siseffect,hencetheprotectiveeffectontheischemia/reperfusioninjuriestomotorneuronfunctions.Keyia/reperfusioninjury;apoptosis促紅細胞生成素(erythropoietin,EPO)是促進紅細胞生成、增加紅細胞能量的主要激素,已廣泛應用于刺激紅系前體細胞的增殖、分化及成熟。近來,Junk等[1]研究表明EPO具有重要的促神經(jīng)生長及神經(jīng)細胞的保護作用[1]。本文通過建立兔脊髓缺血/再灌注損傷
8、模型,觀察重組人促紅細胞生成素(rebinanthumanerythropoietin,rHuEPO)對缺血/再灌注損傷后兔脊髓神經(jīng)細胞的作用,并探討其可能的作用機制,為進一步研究和臨床應用提供基礎(chǔ)。1材料和方法1.1動物分組健康3~5月齡新西蘭大白兔(蘇州大學醫(yī)學院實驗動物中心提供)40只,體重2.5~3.0kg,雌雄不拘,隨機分為假手術(shù)組(A組),對照組(B組),小劑量(1000U/kg)rHuEPO組(C組),大劑量(3