摘要
目的观察依达拉奉edaravone,ED)对体外循环(cardio-pulmonary bypass,CPB)犬肺组织转化生长因子-β1(transforming growth factor-β1,TGF-β1)的影响。方法建立成年犬CPB相关肺损伤模型,随机双盲分为3组(每组10只):c组(CPB中用生理盐水),E,组(CPB前用ED),E2组(CPB中用ED)。检测CPB前(To)、CPB中30min(T,)、停机后15(T2)、30(T3)、60min(T4)肺组织超氧化物歧化酶(superoxidedismutase,SOD)活性、丙二醛(malondialdehyde,MDA)含量及TGF书。表达,采用光镜观察肺组织病理结构,同时于Tn、L、T4时抽取动脉血测定呼吸指数(respiratoryindex,RI)。结果与T0比较,T3、T4时间点3组RI均升高(P〈0.05),E1组、E:组升高[(1.21±0.39),(1.33±0.51);(1.87±0.53),(2.31±0.67)]幅度低于C组[(4.66±0.71),(5.19±0.43)(P〈0.05)],且E1组低于E2组(P〈O.05)。各组在T1~T4时肺组织中SOD活性均下降(P〈0.05);El组[(10.2±1.1)、(9.9±1.5)、(9.8±1.1)、(10.2±1.1)U/rag]、E:组[(10.4±1.2)、(10.0±1.1)、(9.9±1.2)、(10.2±1.1)U/mg],在T1~T4时SOD活性高于c组[(8.4±1.2)、(8.1±1.7)、(8.0±1.2)、(8.3±113)U/rag](P〈0.05)。各组在T1~T4时肺组织MDA含量均升高(P〈0.05);E。组、E:组在T1-L4时MDA含量低于c组(P〈0.05)。组织学检查:C组肺部炎症反应较重;E1组、E2组炎症反应较轻;T0时3组肺组织中偶见TGF书,表达;T1-T4时各组肺组织中TGF-β1。表达均增强,且E1组[(169.6±1.1),(183.9±1.1),(173.8±0.9),(186.0±0.7)]弱于E2组[(150.4±1.1),(166.2±1.0),(151.7±0.8),(153.2±0.8)]、C组[(143.2±1.2),(140.3±0.8),(133.3±0.7),(146.4±0.8)](R0.05)。结论CPB增强肺组织TGF.p。表达,加重肺损伤,ED能抑制肺组织TGF-β1。表达,减轻肺损伤。CPB前使用ED的保护效果优于在CPB过程中使用。
Objective To study the effects of edaravone (ED) on the expression of lung transforming growth factor-β1(TGF-β1) in dogs with cardio-pulmonary bypass (CPB). Methods Thirty adult dogs were randomly divided into three groups (n = 10): group C receiving normal saline during CPB, group El receiving ED before CPB, and group E2 receiving ED during CPB. Lung superoxide dismutase (SOD) activity, malondialdehyde (MDA) level, and TGF-β1 expression were determined before CPB (To), 30 min during CPB (T1), 15 rain after CPB (T2), 30 min after CPB (T3), 60 min after CPB (T4) in all dogs. The histological pathology of lung was evaluated with light microscope. Arterial blood samples were collected for the monitoring of respiratory index (RI) at To, T3 and T4. Results Compared with To, RI increased at T3 and T4 in all groups(P〈0.05). RI was higher in group C [(4.66±0.71 ), (5.19±0.43) ] than group El [(1.21±0.39), (1.33±0.51)] or E2 [ (1.87±0.53), (2.31±0.67)] and was higher in group E2 than group El(P〈0.05). Compared with To, SOD activity decreased gradually at T:T4 in all groups (P〈0.05). SOD activity was higher in groups E1[(10.2±1.1), (9.9±1.5), (9.8±1.1), (10.2±1.1)U/mg] and E2 [(10.4±1.2); (10.0±1.1),(9.9±1.2),(10.2±1.1)U/mg] than group C[(8.4±1.2), (8.1±1.7), (8.0±1.2), (8.3±1.3) U/mg] at T:T4 (P〈0.05). Compared with To, MDA level increased gradually at T1-T4 (P〈0.05). MDA level was lower in groups El and E2 than group C at T1-T4(P〈0.05 ). Histopathological observation: group C showed severe inflammatory responses that were alleviated in groups El and E2. The expression of TGF-β1 was ocassionally detected at To, and increased at TI-T4 in all groups. TGF-β1 expression was lower in group El [(169.6±1.1), (183.9±1.1), (173.8±0.9),(186.0±0.7)] than groups E2 [(150.4±1.1), (166.2±1.0), (151.7±0.8), (153.2±0.8)] and C E(143.2±1.2), (140.3±0.8), (133.3±0. 7), (146.4±0.8)](P〈O.05). Conclusions CPB increased lung TGF-β1 expression and injury, which might be improved by ED. ED used before CPB provided better protection than used during CPB.
出处
《国际麻醉学与复苏杂志》
CAS
2013年第8期707-710,719,共5页
International Journal of Anesthesiology and Resuscitation
关键词
依达拉奉
体外循环
转化生长因子-Β1
肺损伤
犬
Edaravone
Transforming growth factor-β1
Cardiopulmonary bypass
Lung injury
Dog