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ID:18356230
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时间:2018-09-17
《蜂胶水提液预处理对缺血再灌注大鼠小肠肠系膜微循环的改善作用及机制》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、万方数据【文章编号]1000—4718(20lo)ol一0023—05·23·蜂胶水提液预处理对缺血再灌注大鼠小肠肠系膜微循环的改善作用及机制木姚树桐,桑慧,王家富△,商战平,李卫红,于凤秀(泰山医学院病理生理学教研室,山东泰安271000)【摘要]目的:研究蜂胶水提液(WEP)预处理对缺血/再灌注(I/R)大鼠小肠肠系膜微循环的改善作用及其机制。方法:32只雄性Wistar大鼠随机分为假手术(sham)、I/R和WEP(100、200ms/I【g)预处理组,以无创动脉夹夹闭肠系膜上动脉建立小肠I/R损伤模型,于再灌注2h时观测
2、肠系膜微循环变化,分别采用Nackel氏分度法和测定小肠湿/干重比来判定肠道损伤水肿情况,酶联免疫吸附(ELISA)法测定血浆可溶性细胞间黏附分子一1(slCAM一1)含量,分光光度计法测定小肠组织髓过氧化酶(MPO)活性。结果:(1)与I/R组比较,WEP预处理组小肠病理变化明显减轻,Nackel氏分度和小肠湿/干重比明显降低(P<0.01);(2)WEP明显改善肠系膜微循环血流状态,减轻I/R所致的微动静脉收缩(P<0.05)、血流速度减慢(P<0.01)和微血管内白细胞贴壁滚动、黏附(P3、M—l含量(P<0.05)和小肠组织MPO活性(P<0.01)。结论:蜂胶水提液预处理可改善小肠I/R大鼠肠系膜微循环,其机制可能与抑制ICAM一1介导的中性粒细胞活化有关。[关键词]蜂胶水提液;再灌注损伤;肠系膜微循环;胞间黏附分子l;中性白细胞[中图分类号]R331.3;B285.5【文献标识码】AAmeliorativeeffectofwaterextractofpropolispreconditioningonmesen-tericmicrocirculationofratssubjectedtosmallintesti4、nalischemiareper-fusionYAOShu—tong,SANGHui,WANGJia—fu,SHANGZhan—ping,LIWei—hong,YUFeng—-xiu(DormantofPathophysiology,TaishanMedicalCollege,Taian271000,China.E—mad:如,删tSt/tC.edc.饥)[ABSTRACT]AIM:Toinvestigatetheameliorativeeffectofwaterextractofpropolis(WEP)preconditio5、ningonmesentericmicrocirculationofratssubjectedtosnlal[intestinalischemiareperfusion(I/R).METHODS:Thirty—twomaleWistarratswererandomlydividedintoshanl,I/RandWEP(100,200me/ks)preconditioninggroups.Modelofsinai]intestinalI/Rinjurywasmadebyclampingsupermesenteriearteryf6、or45rainfollowedby120minofrepedusioninrats.Mesentericmierecirculationw88detectedattheendofreperfusion.ThedegreeofsmallintestinalinjurywasassessedwithNackel'smethodandintestinalwet/dryratioWasdetermined.Thecontentofsolubleintercellularadhesionmoleede一1(slCAM一1)inplasm7、aandmyeloperoxidase(MPO)activityinintestinaltissuew黜detectedusingenzymelinked—im·muno—sorbentassay(ELlSA)andspectrophotometer,respectively.RESULTS:(1)WEPpreconditioningalleviatedsig-niiicantlythepathologiclesioninsmallintestine,andresultedinasignificantdecreasesinNac8、kel’S8Poreandintestinalwet/dryratio。comparedtothoseinI/Rgroup(P<0.01).(2)ThedisturbanceofthebloodflowinmicrcvesselinducedbyI/Rw船imp
3、M—l含量(P<0.05)和小肠组织MPO活性(P<0.01)。结论:蜂胶水提液预处理可改善小肠I/R大鼠肠系膜微循环,其机制可能与抑制ICAM一1介导的中性粒细胞活化有关。[关键词]蜂胶水提液;再灌注损伤;肠系膜微循环;胞间黏附分子l;中性白细胞[中图分类号]R331.3;B285.5【文献标识码】AAmeliorativeeffectofwaterextractofpropolispreconditioningonmesen-tericmicrocirculationofratssubjectedtosmallintesti
4、nalischemiareper-fusionYAOShu—tong,SANGHui,WANGJia—fu,SHANGZhan—ping,LIWei—hong,YUFeng—-xiu(DormantofPathophysiology,TaishanMedicalCollege,Taian271000,China.E—mad:如,删tSt/tC.edc.饥)[ABSTRACT]AIM:Toinvestigatetheameliorativeeffectofwaterextractofpropolis(WEP)preconditio
5、ningonmesentericmicrocirculationofratssubjectedtosnlal[intestinalischemiareperfusion(I/R).METHODS:Thirty—twomaleWistarratswererandomlydividedintoshanl,I/RandWEP(100,200me/ks)preconditioninggroups.Modelofsinai]intestinalI/Rinjurywasmadebyclampingsupermesenteriearteryf
6、or45rainfollowedby120minofrepedusioninrats.Mesentericmierecirculationw88detectedattheendofreperfusion.ThedegreeofsmallintestinalinjurywasassessedwithNackel'smethodandintestinalwet/dryratioWasdetermined.Thecontentofsolubleintercellularadhesionmoleede一1(slCAM一1)inplasm
7、aandmyeloperoxidase(MPO)activityinintestinaltissuew黜detectedusingenzymelinked—im·muno—sorbentassay(ELlSA)andspectrophotometer,respectively.RESULTS:(1)WEPpreconditioningalleviatedsig-niiicantlythepathologiclesioninsmallintestine,andresultedinasignificantdecreasesinNac
8、kel’S8Poreandintestinalwet/dryratio。comparedtothoseinI/Rgroup(P<0.01).(2)ThedisturbanceofthebloodflowinmicrcvesselinducedbyI/Rw船imp
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