摘要
目的:探讨S-腺苷蛋氨酸对大鼠肝脏部分缺血再灌注损伤的保护作用及机制。方法:将36只雌性SD大鼠随机分为3组(n=12):假手术组、缺血再灌注组、S-腺苷蛋氨酸组。建立大鼠肝脏70%缺血再灌注模型,缺血时间为1 h。腺苷蛋氨酸于术前1 d及术后1 h腹腔注射(100 mg/kg),假手术组及缺血再灌注组在相同时间注射等量生理盐水。各组大鼠分别于肝脏再灌注后6 h和24 h处死,取肝脏及血液标本,检测血清谷丙转氨酶(alanine aminotransferase,ALT)、谷草转氨酶(aspertate aminotransferase,AST)、肿瘤坏死因子-α(tumor necrosis factorα,TNF-α),以及肝脏组织丙二醛(malonyldialdehyde,MDA)含量,并观察肝脏组织的病理改变。结果:与缺血再灌注组相比,S-腺苷蛋氨酸组的ALT、AST、TNF-α水平明显降低(P<0.01),MDA含量明显减少(P<0.05),肝脏病理损伤较轻。结论:S-腺苷蛋氨酸对大鼠肝脏缺血再灌注损伤具有保护作用,其机制可能与抗氧化及抑制炎症因子产生和活化有关。
Objective: To investigate the protective effect and mechanism of S-ademetionine against hepatic ischemia-reperfusion injury in rats and its mechanism. Methods: Thirty-six SD female rats were randomly divided into 3 groups, SHAM: sham operation group, IR: ischemia-reperfusion group, SAMe: S-ademetionine treatment group. The model of 70% hepatic ischemia-reperfusion was established in the rats. Ischemia lasted for 1 h. The rats of SAMe group received SAM(100 mg/kg) intraperitoneally 1 d prior to operation and 1 h after operation. The other groups received saline solution at the same time. Rats were killed at 6,24 h after reperfusion respectively. Blood samples were collected and analyzed for the levels of serum, alanine aminotransferase(ALT), aspertate aminotransferase(AST), tumor necrosis factor α(TNF-α). The malonyldialdehyde (MDA) in liver tissues were measured and histologic changes were observed in HE staining. Results: Comparison to IR group, SAMe group was associated with lower serum transaminases ALT, AST, TNF-α. Besides, MDA expression in SAMe group was significantly lower than those in IR group. The injury of liver tissue in IR group was more obviously. Conclusion: S- ademetionine has a protective effect in hepatic ischemia-reperfusion injury in rat. The mechanism of protection appears to be dependent on its inhibitory effect on neutrophil infiltration and inflammatory cytokines.
出处
《南通大学学报(医学版)》
2013年第5期366-368,共3页
Journal of Nantong University(Medical sciences)