碱性成纤维生长因子对大鼠成肌细胞氧化应激损伤的作用及其机制  被引量:6

Effects and mechanism of bFGF on rat myoblast oxidative injury induced by hydrogen peroxide

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作  者:毛挺挺 方红波 王晓慧[2] 潘莹莹[2] 谢浩煌[2] 张宏宇[2] 肖健[2] 姜丽萍[3] 

机构地区:[1]宁波市医疗中心李惠利东部医院,浙江宁波315000 [2]温州医科大学,浙江温州325035 [3]上海交通大学附属新华医院,上海200092

出  处:《中国应用生理学杂志》2017年第2期159-163,共5页Chinese Journal of Applied Physiology

基  金:国家自然科学基金(81372064);上海市教委护理高原学科建设资助项目

摘  要:目的:探讨碱性成纤维生长因子(bFGF)下调氧自由基水平在大鼠成肌细胞氧化应激中的保护作用。方法:采用对数生长期大鼠成肌细胞,随机分为四组(n=6):正常对照组(control),单纯bFGF组(bFGF),氧化应激组(H_2O_2),干预组(bFGF+H_2O_2)。氧化应激组采用含100μmol/L H_2O_2的培养基继续孵育4 h。免疫组化检测B淋巴细胞瘤-2基因(Bcl-2)阳性沉积颗粒;免疫荧光观察活性氧自由基(ROS)水平、Bcl-2、B淋巴细胞瘤-2基因相关X蛋白(Bax)及细胞色素C(Cyt.C)表达;Western blot检测Cyt.C、聚腺苷二磷酸核糖聚合酶(PARP)蛋白表达情况。结果:与正常组比较,氧化应激组成肌细胞Bcl-2表达降低,ROS、Cyt.C表达显著增加(P<0.05)。与氧化应激组比较,bFGF干预后的成肌细胞Bcl-2表达增加,ROS及Cyt.C表达减少(P<0.05)。结论:bFGF对成肌细胞氧化应激具有保护作用,其机制可能与bFGF下调氧自由基水平、Bcl-2蛋白增加、Cyt.C表达减少有关。Objective: To explore the protective role of basic fibreblast growth factor (bFGF) on attenuating hydrogen peroxide-induced injury in cultured rat myoblasts. Methods: Cultured rat myoblasts at growth phase were randomly divided into four groups ( n = 6) : control group (control), bFGF group (bFGF), model group(H202) and the treatment group (bFGF + H2O2). Model group was treated with 100 μmol/L hydrogen peroxide for 4h. B-cell lymphoma-2 (Bcl-2) positive particles were detected by immunohistochemistry; Reactive oxygen species (ROS) and expression for Bcl-2 associated X protein (Bax), Bcl-2 and Cytochrome C (Cyt. C) fluorescence were observed under the invented microscope; Cyt. C and Poly ADP-ribose polymerase(PARP)protein were assessed by Western blot. Results: Compared with control group, the myoblats in the model group showed low expression of Bcl-2 positive particles, accompanied by high expression of ROS level and Cyt. C fuorescence ( P 〈 0.05) ; Compared with medel group, bFGF enhanced Bcl-2 activity of the myoblasts, and significantly downregulated Cyt. C and PARP expression ( P 〈 0.05). Conclusion: bFGF could attenuate oxidative injury of rat myoblasts induced by hydrogen peroxide, which mechanism might be related to enhanced Bcl-2 and reduced ROS, Cyt. C levels.

关 键 词:压疮深部组织损伤 氧化应激 大鼠成肌细胞 BFGF 

分 类 号:R363.2[医药卫生—病理学] R471[医药卫生—基础医学]

 

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