摘要：
Objective To investigate the effects of breviscapine injection on intestinal injury induced by intestine ischemia-reperfusion(IIR). Methods 48 males SD rats with 8-week old were randomly divided into 4 groups:Sham,intestine ischemia-reperfusion(IIR),EB+IIR,TP+IIR. Breviscapine injection 20 mg/(kg·d) was given intraperitoneally in EB + IIR group. TPCA-1(12 mg/kg)was given intravenously 30 min before surgery in TP+IIR group. Rats were subjected to superior mesenteric artery occlusion consisting of 45 min of ischemia and 6 h of reperfusion;sham laparotomy served as controls. Intestine pathology was assayed by H&E staining. Con-centrations of TNF-α,IL-1β,and IL-6 in intestinal mucosa were determined by ELISA. The protein expressions of IκB-α,NF-κB ,ICAM-1of intestine tissue were assayed by western blot. Results IIR induced serious intesti-nal injury ,evidenced as poor intestine pathology ,elevation of TNF-α,IL-1β,and IL-6 levels in intestinal mu- cosa,accompanied with IκB-α/NF-κB/ICAM-1 pathway activation. However,breviscapine injection pretreatment could inhibit IκB-α/NF-κB/ICAM-1 pathway activation,leading to reduction of TNF-α,IL-1β,and IL-6 concen-trations in lung,finally attenuate ALI induced by IIR. Conclusion Breviscapine injection pretreatment could atten-uate inflammation in intestine after IIR injury via inhibiting IκB-α/NF-κB/ICAM-1signaling pathway.%目的 探讨灯盏花注射液在肠缺血再灌注早期小肠损伤中的作用及其机制.方法 48只8周龄健康雄性SD大鼠随机分为假手术对照(Sham)组,肠I/R损伤(IIR)组,灯盏花注射液处理组(EB+IIR)组,IκB-α抑制剂TPCA-1处理(TP+IIR)组.EB+IIR组在术前7 d每天经腹腔注射给予灯盏花注射液20 mg/(kg·d),TP+IIR组在术前30 min尾静脉给予TPCA-1(12 mg/kg),另两组注入等量生理盐水.采用夹闭SD大鼠肠系膜前动脉45 min后再灌注6h的方法造成肠缺血再灌注损伤模型.处死大鼠取小肠标本,HE染色观察肠组织病理学改变,ELISA检测肠粘膜组织TNF-α、IL-1β和IL-6水平;蛋白印迹法检测肠粘膜组织IκB-α、NF-κB、ICAM-1蛋白表达水平.结果 肠缺血再灌注导致明显小肠损伤,肠组织炎症指标明显增高,表现为TNF-α、IL-1β和IL-6含量明显升高(与假手术组比较P<0.05),IκB-α/NF-κB/ICAM-1通路活化;灯盏花注射液预处理可抑制小肠组织IκB-α/NF-κB/ICAM-1活化,减轻小肠缺血再灌注引起的早期肠道损伤,并下调小肠组织TNF-α、IL-1β和IL-6含量(与缺血再灌注组比较P<0.05),同样,应用IκB-α磷酸化抑制剂TPCA-1处理后,IκB-α/NF-κB/ICAM-1通路受到抑制,小肠损伤程度得到减轻.结论 灯盏花注射液预处理通过抑制IκB-α/NF-κB/ICAM-1通路减轻大鼠肠缺血再灌注损伤.
