TLR4和NF-κB在脑出血大鼠炎症损伤中的表达及意义  

Expression and significance of TLR4 and NF-κB on inflammatory injure after intracerebral hemorrhage in rats

作　　者：杨莎莎[1] 田清友[1] 周洪霞[1] 孟令丽[1] 张作凤[1] 王茜[1] 魏子峰[1] 

机构地区：[1]河北联合大学基础医学院解剖教研室,河北唐山063000

出　　处：《重庆医学》2014年第5期584-586,共3页Chongqing medicine

基　　金：河北省唐山市科学技术研究与发展计划资助项目(12140209A-31)

摘　　要：目的探讨Toll样受体4(TLR4)和核因子-κB(NF-κB)在脑出血(ICH)大鼠炎症损伤中的表达和意义。方法选取雄性SD大鼠60只,分为假手术(Sham组)、ICH术后12h(ICH 12h组)、24h(ICH 24h组)、72h(ICH 72h组)、7d(ICH 7d组),每组12只。采用自体血注入法制作脑出血模型,Garcia法对各组大鼠进行神经行为功能学评分,干/湿质量法测定脑组织含水量的变化,尼氏染色观察脑组织病理学变化,免疫组织化学及蛋白免疫印迹法(Western blot)观察大鼠脑出血后血肿周围TLR4和NF-κB的蛋白表达水平。结果 ICH后12h,血肿周围TLR4和NF-κB开始阳性表达,随着时间的延续,表达逐渐增多,72h达到高峰,出现严重脑组织水肿及神经功能损伤,Western blot显示TLR4和NF-κB的表达量与之结果一致。结论大鼠ICH可引起血肿周围脑组织炎症损伤,TLR4可能通过激活NF-κB参与ICH后引起的继发性炎症损伤。Objective To evaluate expression and significance of TLR4 and NF-κB on inflammatory injure after intracerebral hemorrhage in rats .Methods 60 Sprague Dawley maleness rats were randomly divided into Sham group ,12 h ,24 h ,72 h and 7 d af-ter ICH group（12 s） .The ICH was induced by injection of autologous blood in rats .The behavioral changes were detected by neu-rologic deficit score .The water content of the brain was used to evaluate brain edema changes .Number of TLR4 and NF-κB positive cells by Nissl staining and the expression of protein determined by immunohistochemistry and Western blot .Results After ICH 12 h ,expression of TLR4 and NF-κB positive cells around the hematoma were expressed ,with the extension of the time ,expression was gradually increasing ,and after ICH 72 h the expression of protein were the highest .Cerebral edema and severe neurological damage occurred .Western blot shows the amount of TLR4 expression and NF-κB were in line with the result .Conclusion After in-tracerebral hemorrhage in rat causing inflammatory injure of brain tissue around the hematoma .TLR4 may activate the expression of NF-κB involved in the secondary inflammatory injure after intracerebral hemorrhage in rats .

关 键 词：脑出血 TOLL样受体4 炎症因子 TOLL-LIKE RECEPTOR 4 

分 类 号：R743.34[医药卫生—神经病学与精神病学]