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滇乌碱通过线粒体凋亡途径致大鼠心肌损伤的研究
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司徒莹 ,程婉秋 ,沈志滨 ,陈艳芬 ,唐春萍 ,陈 聪 ,江 涛 (1.广东药科大学中药学院,广州 510006;
2.广东药科大学实验动物中心,广州 510006;3.广东省局部精准药物递药制剂工程技术研究中心,广州
510006)
中图分类号 R965;R285 文献标志码 A 文章编号 1001-0408(2022)23-2864-05
DOI 10.6039/j.issn.1001-0408.2022.23.09
摘 要 目的 研究滇乌碱对大鼠心肌损伤的影响及其线粒体凋亡途径相关机制。方法 采用随机数字表法将40只SD大鼠随机
分为正常组(生理盐水),滇乌碱高、低剂量组(0.14、0.09 mg/kg),乌头碱组(阳性对照,0.88 mg/kg),每组10只,每天灌胃给药1次,
连续 7 d。检测大鼠血清中乳酸脱氢酶(LDH)、肌酸激酶(CK)、肌酸激酶同工酶(CK-MB)、超氧化物歧化酶(SOD)、丙二醛
(MDA)水平和心肌组织中活性氧(ROS)水平,观察大鼠心肌组织病理形态学和心肌组织线粒体超微结构变化情况,检测大鼠心
肌细胞凋亡情况,检测大鼠心肌组织中B淋巴细胞瘤2(Bcl-2)、Bcl-2相关X蛋白(Bax)、胱天蛋白酶9(caspase-9)、活化的胱天蛋
白酶9(cleaved-caspase-9)、caspase-3和cleaved-caspase-3蛋白相对表达水平。结果 与正常组比较,滇乌碱高、低剂量组大鼠血清
中LDH、CK、CK-MB、MDA水平和心肌细胞凋亡数量及心肌组织中ROS水平、caspase-3蛋白表达水平均显著升高/增加(P<0.05
或 P<0.01),血清中 SOD 水平和心肌组织中 Bcl-2/ Bax 比值显著降低(P<0.01),且滇乌碱高剂量组大鼠心肌组织中 caspase-9、
cleaved-caspase-9、caspase-3、cleaved-caspase-3蛋白相对表达水平显著升高(P<0.05);两组大鼠均出现了心肌纤维排列紊乱、线粒
体肿胀等病理变化。结论 滇乌碱可引起大鼠心肌细胞损伤。其机制可能与破坏心肌细胞膜的完整性,使心肌细胞发生氧化应
激,诱导心肌细胞通过线粒体途径发生凋亡有关。
关键词 滇乌碱;心脏毒性;氧化应激;凋亡;线粒体途径;心肌损伤
Study on myocardial injury of rats induced by yunaconitine through mitochondrial apoptosis pathway
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SITU Ying ,CHENG Wanqiu ,SHEN Zhibin ,CHEN Yanfen ,TANG Chunping ,CHEN Cong ,JIANG Tao 2, 3
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(1. School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China;
2. Laboratory Animal Center, Guangdong Pharmaceutical University, Guangzhou 510006, China;3. Guangdong
Engineering Research Center for Local Precise Drug Delivery, Guangzhou 510006, China)
ABSTRACT OBJECTIVE To study the effects of yunaconitine on myocardial injury in rats and its mechanism related to
mitochondrial apoptosis pathway rats. METHODS Forty SD rats were divided into normal group (normal saline), yunaconitine
high-dose and low-dose groups(0.14, 0.09 mg/kg)and aconitine group (positive control, 0.88 mg/kg) by random number method,
with 10 rats in each group. They were given relevant medicine intragastrically, once a day, for consecutive 7 days. The levels of
lactate dehydrogenase (LDH), creatine kinase (CK), creatine kinase isoenzyme (CK-MB), superoxide dismutase (SOD) and
malondialdehyde (MDA) in serum as well as the level of reactive oxygen species (ROS) in myocardial tissue were detected. The
pathomorphological changes of myocardium and ultrastructural changes of myocardial mitochondria were all observed. The
apoptosis of cardiomyocytes was determined. The protein relative expressions of B-cell lymphoma-2 (Bcl-2), Bcl-2 associated X
protein (Bax), caspase-9, cleaved-caspase-9, caspase-3 and cleaved-caspase-3 were determined in myocardium of rats. RESULTS
Compared with normal group, the serum levels of LDH, CK, CK-MB and MDA, the apoptotic numbers of cardiomyocytes, the
level of ROS and protein expression of caspase-3 in myocardium were increased significantly in yunaconitine high-dose and low-
dose groups (P<0.05 or P<0.01); serum level of SOD and Bcl-2/Bax ratio in myocardium were all decreased significantly (P<
0.01); the protein relative expressions of caspase-9, cleaved-caspase-9, caspase-3 and cleaved-caspase-3 in myocardium were
significantly increased in yunaconitine high-dose group (P<0.05); some pathomorphological changes were found in 2 groups, such
as myocardial fiber disorder, mitochondrial swelling. CONCLUSIONS Yunacotine could cause myocardial injury in rats. Its
mechanism might be related to destroying the integrity of cardiomyocyte membrane, causing oxidative stress of cardiomyocyte, and
inducing the apoptosis of myocardial cells through
Δ 基金项目 公益性行业科研专项经费项目(No.201507004)
mitochondrial pathway.
*第一作者 硕士研究生。研究方向:中药药效评价与临床应用。
E-mail:916347915@qq.com KEYWORDS yunaconitine; cardiotoxicity; oxidative stress;
# 通信作者 教授,硕士生导师。研究方向:中药药效评价与临床 apoptosis; mitochondrial pathway; myocardial injury
应用。E-mail:1181894563@qq.com
· 2864 · China Pharmacy 2022 Vol. 33 No. 23 中国药房 2022年第33卷第23期