【摘要】 目的:研究羟乙基淀粉200/0.5注射液(Hydroxyethyl Starch,HES)对失血性休克大鼠脑的保护作用。方法:25只SD大鼠随机分为对照组(A组)、休克组(B组)、全部自体血复苏组(C组)、2倍出血量的HES(超常量,>33 mg.kg-1)复苏组(D组)、1倍出血量的HES(常规量,≤33 mg.kg-1)加1/2出血量的自体血复苏组(E组),每组5只。采用大鼠股动脉放血休克模型,休克1 h后分别输入上述液体,复苏30 min后取脑。脑组织切片行HE染色观察脑水肿和炎性细胞浸润的程度;用免疫组化染色和Western-bloting法检测脑组织中NF-κB的核移位及其表达活性。结果:在休克1 h时脑组织NF-κB的表达即有增加;C组和D组NF-κB的表达增加明显,脑水肿和炎性细胞浸润较严重;E组NF-κB的表达增加下调,脑水肿和炎性细胞浸润亦较轻。各组NF-κB的核移位与脑组织中NF-κB的表达活性变化基本一致。结论:在急性失血性休克(出血量为估计总血量的35%)时,大鼠脑组织中NF-κB的核移位和表达增加;常规量HES复苏使NF-κB表达增加下调、核移位减少、脑水肿和炎性细胞浸润亦减轻,对脑可能具有保护作用。更多还原

【Abstract】 AIM: To investigate the protective effect of 6% Hydroxyethyl Starch(HES,200/(0.5)) on the brain of hemorrhagic-shocked rats.METHODS: Sprague-Dawley rats were randomly divided into sham operation group(group A),hemorrhagic shocked group(group B),whole blood return group(group C),HES at 2x shed blood volume(SBV) group(group D),HES at 1x SBV plus 1/2 SBV group(group E).Hemorrhagic Shock was induced by intermittently withdrawing blood from an iliac catheter.Except group A and B,the other groups were resuscitated with different liquids and lasted 30 min after 1h for shock.The extent of brain edema and inflammatory cells infiltrating was observed by Hematoxylin-Eosin staining,and the expression of nuclear factor kappa-B(NF-κB) in the rat brain and translocation of nucleus were detected using immunohistochemistry and Western blot method.RESULTS: Except the sham group,there were brain edema and inflammatory cells infiltrating in the other groups,which was more obvious in group C and D.The expression of NF-κB in the rat brain was significantly increased in group B and other groups as compared with those in group A(P<(0.01));but their increase were markedly decreased in group E as compared with those in C and D groups(P<(0.05) or P<(0.01)).The increase of translocation of NF-κB was nearly accordant with the expression of NF-κB in the rat brain in every group.CONCLUSION: Our results suggest that the expression and the translocation of nucleus of NF-κB in brain tissue were significantly increased in the rat during early hemorrhagic shock(acute blood loss was 35% of the estimated total blood).6%HES in the normal doses resuscitation can decrease the expression and the translocation of nucleus of NF-κB,and alleviate the cerebral ischemiareperfusion injury,and there is the protective effect on the rat brain during hemorrhagic shock.更多还原