2、与其它各吸烟组相比差异有显著性(P<0.05)。结论:吸烟导致大鼠脑组织TNFα的表达升高,戒烟后表达下降,TNFα表达升高可能是吸烟导致脑梗死的主要途径之一。【关键词】吸烟;大鼠;脑组织;TNFα AbstractObjective:To observe the expression of TNFα on smoked rats brain tissue of different groups,and try to explore the possible mechanisms of TNFα8 in ischemic cerebral vascular dis
3、eases(ICVD).Methods:Animal model of smoked rats were made,MethodHealthy Wistar rats were randomly divided into six groups of ten animals for each one.A group(the normal control group),B group(the nonesmoking control group),C group(shorttime smoking group),D group(longtime and smalldose sm
4、oking group),E group(longtime and bigdose smoking group),F group(givingup smoking group).TheimmunohistochemicalmethodwasusedtoobservetheexpressionofTNFαineverygroup.Results:The positive cells of TNFα showed brown and located neurocyte neurogliocyte and vascular endothelial cell.There were
5、 a few expression in group A and group B(P>0.05).The expression in group C,D,E were stronger than group A,B.The expression in group F was lower than group C,group D and group E(P<0.05).Conclusion:Exposure to smoking can elevate the expression of TNFα.While givingup smoking can reduce t
6、he expression of TNFα.The elevating expression of TNFα may be one of the ways for ICVD after exposured to cigarettes.Givingup smoking can prevent and reduce the ICVD.AntiTNFα maybe a new way for prevention ICVD.8 Keywordssmoking;rat;braintissue;TNFα 肿瘤坏死因子α(TNFα)在缺血性脑血管病中的作用日益受到众多学者的