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时间:2020-06-04
《犬尿氨酸通路相关物质在大鼠慢性脑低灌注致认知障碍中的作用.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、华笔一12,Jt~il0l竹柄粜忠20t16Jj第16卷6期ChinJ(;erialrHeartBrainVesselDis,iIi11201,1.V{tl16,No.6.基础研究.犬尿氨酸通路相关物质在大鼠慢性脑低灌注致认知障碍中的作用张敏慧.韩彦青,王晓晖,裴宇恒,李东芳,李光来摘要:目的观察慢性脑低灌注大鼠海马组织中干扰素、FNFa、诱导型N()合酶(iN()s)、吲哚胺2,3双加氧酶(II)(】)和犬尿氨酸(KYN)的表达,探讨慢性脑低灌注致认知功能损害大鼠海马组织中KYN通路相关代谢产物的变化特点。方法选择war大鼠3O只,随机分为假手术组15只和双侧颈总动脉永久性结扎组
2、(2V()组)15只制作慢性脑低灌注大鼠模型,Morris水迷宫检测2VO大鼠空间学习与记忆能力变化,免疫组织化学检测大鼠海马L、Al区iN()S、干扰素一7和rrNF—a的表达,ElISA法检测II)()及KYN的水平。结果与假手术组比较,2V()组大鼠第3天开始逃避潜伏期明显延长,平台象限游泳距离百分比明显减少,iN()S、干扰素一及FNF—d阳性表达.II)()和KYN水平明显升高[(4.73±0.21)ng/mlus(0.89±0.06)ng/ml和(1.55±0.12)ng/mlUS(0.19±0.02)ng/ml,P:0.05]。结论慢性脑灌注大鼠的病理生理过程包含着炎
3、性反应,而炎性反应的发生很可能刺激了II)()和KYN的高表达,KYN和ID()的蓄积有可能参与其导致认知障碍的过程。关键词:犬尿氨酸;认知障碍;海马;干扰素Ⅱ型;肿瘤坏死因子;一氧化氮合酶RoleofkynureninemetabolicpathwayinratswithcognitiveimpairmentinducedbychroniccerebralhypOperfusi0nZHANGMin—hui,HANYan一{ling,WAN(]Xiaohui,etalt1)epart;?lelltoJNeroolog,SeeondAfJiliatedHospital《)}Shanx
4、iMedi{alUniversit.Tiyuan030001,,~hanriProvi7it’·China)Abstract:0bjectiveTostudythefeaturesofkynurenine(KYN)pathwaymetaholitesinhippo—campusofratswithcognitiveimpairmentinducedbychroniccerebralhypoperfusionbyobservingtheexpressionsofIFN一,TNFa,iN()S,ID()andKYN.MethodsThirtyWistarratswereran—doml
5、ydividedintoshamoperationgroupandbilateralcarotidarterypermanentligationgroup(15ineachgroup).Aratmodelofchroniccerebralhypoperfusionwasestablished.SpatiallearningandmemoryabilityinbilateralcarotidartcrypermanentligationgroupwastestedinMorriswatermaze.ExpressionsofiN()S,IFN—,TNFainhippocampalCA
6、1areaweredetectedbyimmunohisto—chemistryandElISA,respectively.ResultsTheescapelatencyperiodwassignificantlylongerwhiletheplatformquadrantswimmingdistancewassignificantlyshorterinbilateraicarotidarterypermanentligationgroupthaninshamoperationgroup(P7、eexpressionlevelsofiN()S,INF一7,TNF—a,ID()andKYNweresignificantlyhigh—erinbilateralcarotidarterypermanentligationgroupthaninshamoperationgroup(P<0.05).ConclusionThepathophysiologicalprocessinratswithchroniccerebralperfusionincludesin—fla
7、eexpressionlevelsofiN()S,INF一7,TNF—a,ID()andKYNweresignificantlyhigh—erinbilateralcarotidarterypermanentligationgroupthaninshamoperationgroup(P<0.05).ConclusionThepathophysiologicalprocessinratswithchroniccerebralperfusionincludesin—fla
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