槲皮素对心肌缺血后线粒体能量代谢功能的影响
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篇名: 槲皮素对心肌缺血后线粒体能量代谢功能的影响
TITLE: Effects of quercetin on mitochondrial energy metabolism function after myocardial ischemia
摘要: 目的 探究槲皮素对心肌缺血后线粒体能量代谢功能的影响。方法将H9c2心肌细胞分为空白组,模型组,槲皮素高、中、低剂量组(40、20、10μmol/L)和阳性对照组(环孢菌素A1μmol/L),细胞缺氧处理后,检测活性氧(ROS)、线粒体膜电位(MMP)、线粒体膜通透性转换孔(MPTP)开放程度、腺苷三磷酸(ATP)、丙二醛(MDA)、乳酸脱氢酶(LDH)和肌酸激酶(CK)的变化。将大鼠随机分为假手术组,模型组,槲皮素高、中、低剂量组(100、50、25mg/kg)和阳性对照组(曲美他嗪6.3mg/kg),每组8只,灌胃相应药物,每天1次,连续7d;大鼠末次给药后,通过冠状动脉左前降支结扎建立心肌缺血模型,检测血清中LDH、MDA、肌酸激酶同工酶MB(CK-MB)、超氧化物歧化酶(SOD)、线粒体呼吸链复合物Ⅰ(complexⅠ)、complexⅣ和ATP的含量。结果与模型组比较,槲皮素高、中、低剂量组和阳性对照组细胞中ROS荧光强度、MPTP开放程度和CK、LDH、MDA含量均显著降低,MMP和ATP含量均显著升高(P<0.01);槲皮素高、中、低剂量组和阳性对照组大鼠血清中CK-MB、LDH和MDA含量均显著降低,SOD、complexⅠ、complexⅣ和ATP(阳性对照组除外)含量均显著升高(P<0.05或P<0.01)。结论槲皮素能有效减轻心肌缺氧损伤,促进内源性能量的生成,改善心肌缺血后线粒体功能。
ABSTRACT: OBJECTIVE To investigate the effects of quercetin on mitochondrial energy metabolism function after myocardial ischemia. METHODS H9c2 cells were divided into blank group, model group, quercetin high-dose, medium-dose and low-dose groups (40, 20, 10 μmol/L), and positive control group (cyclosporine A, 1 μmol/L). Reactive oxygen species (ROS), mitochondrial membrane potential (MMP), openness of mitochondrial permeability transition pore (MPTP), adenosine triphosphate (ATP), malondialdehyde (MDA), lactate dehydrogenase (LDH) and creatine kinase (CK) were observed after cell hypoxia treatment. Rats were randomly assigned into sham operation group, model group, quercetin high-dose, medium-dose and low-dose groups (100, 50, 25 mg/kg), and positive control group (trimetazidine, 6.3 mg/kg), with 8 rats in each group. They were given relevant medicine intragastrically, once a day, for 7 consecutive days. After the last medication, myocardial ischemia model was induced by the ligation of the left anterior descending branch of the coronary artery. The contents of LDH, MDA, creatine kinase isoenzyme-MB (CK-MB), superoxide dismutase (SOD), complex Ⅰ, complex Ⅳ and ATP in serum were all determined. RESULTS Compared with the model group, ROS fluorescence intensity, openness of MPTP, the contents of CK, LDH and MDA were significantly decreased in quercetin low-dose, medium-dose and high-dose groups, and positive control group, while the contents of MMP and ATP were all increased significantly (P<0.01); the contents of CK-MB, LDH and MDA in serum were all decreased significantly in quercetin low-dose, medium-dose and high-dose groups, and positive control group, while the contents of SOD, complex Ⅰ, complex Ⅳ and ATP (except for positive control group) were increased significantly (P< 0.05 or P<0.01). CONCLUSIONS Quercetin can effectively reduce myocardial hypoxic injury, promote endogenous energy production and improve mitochondrial function after myocardial ischemia.
期刊: 2024年第35卷第04期
作者: 王盼盼;杨赞;刘冬兰;周怡
AUTHORS: WANG Panpan,YANG Zan,LIU Donglan,ZHOU Yi
关键字: 槲皮素;心肌缺血;缺血性心脏病;线粒体;能量代谢
KEYWORDS: quercetin; myocardial ischemia; myocardial ischemia; mitochondria; energy metabolism
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