Breviscapine pretreatment attenuates ischemia reperfusion induced intestinal mucosal barrier damage via promoting eNOS/NO production / 实用医学杂志

ABSTRACT

Objective To investigate the effects of breviscapine injection on intestinal mucosal barrier damage induced by intestine ischemia-reperfusion (IIR). Methods 44 old SD rats were randomly divided into four groupssham,intestine ischemia-reperfusion(IIR),EB+IIR,LN+IIR. Breviscapine injection 20 mg/(kg·d) was given intraperitoneally in EB+IIR group. L-NAME(100 mg/kg)was given intravenously 30 min before surgery in LN+IIR group. Rats were subjected to superior mesenteric artery occlusion consisting of 45 min of ischemia and 4 h of reperfusion;sham laparotomy served as controls. Intestine pathology was assayed by H&E staining. Concen-trations of SIgA,iNOS,eNOS and NO in intestinal mucosa,also endotoxine in plasma,were determined by ELI-SA. Results IIR induced serious intestinal mechanical and immune barrier damage ,evidenced as poor intestine pathology,depression of intestinal SIgA and eNOS levels,elevation of intestinal iNOS/NO levels. However,brevis-capine injection pretreatment could promote eNOS/NO production ,down-regulated iNOS expression ,leading to ele-vating SIgA concentration in intestine ,attenuate endotoxemia induced by IIR. The protection was canceled when application of L-NAME. Conclusion Breviscapine pretreatment attenuates ischemia-reperfusion-induced intestinal mucosal barrier damage via promoting eNOS/NO production.