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槲皮素通过ACE2-Ang-(1-7)-Mas轴对AngⅡ诱导下大鼠心肌收

        缩蛋白表达的影响                     Δ


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        贾梦楠 ,朱明军 ,王永霞 ,李 彬 ,郝轩轩 ,王新陆 ,于 瑞 ,常鑫迪 ,李洁薇(1.河南中医药大学,郑州
                                                                   2
        450046;2.河南中医药大学第一附属医院心脏中心,郑州 450099)
        中图分类号 R96;R541          文献标志码 A          文章编号     1001-0408(2021)23-2839-07
        DOI  10.6039/j.issn.1001-0408.2021.23.05
        摘  要   目的:探讨槲皮素(Que)通过血管紧张素转换酶 2-血管紧张素-(1-7)-Mas 轴[ACE2-Ang-(1-7)-Mas 轴]对血管紧张素Ⅱ
       (AngⅡ)诱导下原代大鼠心肌收缩蛋白表达的影响。方法:取1~2 d 日龄大鼠的心肌组织,分离、培养原代心肌细胞,并构建心肌
        细胞ACE2基因沉默模型。实验分为12组,其中AngⅡ组、AngⅡ+小干扰RNA(siRNA)组、AngⅡ+A779组为模型组,AngⅡ+氯沙
        坦组为阳性对照组,AngⅡ+Que40组、AngⅡ+Que80组、AngⅡ+siRNA+Que40组、AngⅡ+siRNA+Que80组、AngⅡ+A779+Que40
        组、AngⅡ+A779+Que80组为实验组,另设空白组、siRNA组。其中AngⅡ终浓度为1×10                  -6  mol/L,siRNA终浓度为50 nmol/L,Que
        终浓度分别为40、80 μmol/L,A779(Mas受体拮抗剂)终浓度为1 μmol/L,氯沙坦终浓度为1×10                -4  mol/L。分别检测各组心肌细胞
                                                         2+
                                                      +
        中ACE2、Ang-(1-7)、Mas的mRNA和蛋白表达水平,以及Na /Ca 交换通道(NCX)、钙泵(SERCA2a)、磷蛋白(PLB)等3种心肌收
        缩蛋白的表达水平。结果:与AngⅡ组比较,AngⅡ+Que80组细胞中的Mas mRNA表达水平升高(P<0.05);AngⅡ+氯沙坦组细
        胞中的ACE2、Mas mRNA表达水平升高(P<0.05)。与AngⅡ组比较,AngⅡ+Que40组细胞中的ACE2、Ang-(1-7)蛋白表达水平
        升高(P<0.05);与AngⅡ+siRNA组比较,仅AngⅡ+siRNA+Que40组Ang-(1-7)蛋白表达水平升高(P<0.05);与AngⅡ+A779组
        比较,仅AngⅡ+A779+Que40组Ang-(1-7)蛋白表达水平升高(P<0.05)。与AngⅡ组比较,AngⅡ+Que40组NCX蛋白表达水平
        降低(P<0.05),AngⅡ+氯沙坦组NCX蛋白表达水平降低(P<0.05);与AngⅡ+A779组比较,AngⅡ+A779+ Que80组NCX蛋白表
        达水平降低(P<0.05)。结论:Que一定程度上提高了AngⅡ诱导大鼠心肌细胞模型中ACE2-Ang-(1-7)-Mas轴的表达,从而调节
        心肌收缩蛋白。
        关键词 槲皮素;血管紧张素转换酶2-血管紧张素(1-7)-Mas轴;心肌细胞;血管紧张素Ⅱ;心肌收缩蛋白

        Effects of Quercetin on the Expression of Ang ⅡⅡ-induced Myocardial Contractile Protein of Rats through
        ACE2-Ang-(1-7)-Mas Axis
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        JIA Mengnan ,ZHU Mingjun ,WANG Yongxia ,LI Bin ,HAO Xuanxuan ,WANG Xinlu ,YU Rui ,CHANG
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        Xindi ,LI Jiewei(1. Henan University of Chinese Medicine,Zhengzhou 450046,China;2. Heart Center,the
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        First Affiliated Hospital of Henan University of Chinese Medicine,Zhengzhou 450099,China)
        ABSTRACT    OBJECTIVE:To investigate the effects of quercetin(Que)on the expression of angiotensin Ⅱ(AngⅡ)-induced
        myocardial contractile proteins of primary rats through angiotensin-converting enzyme 2-angiotensin-(1-7)-Mas (ACE2-Ang-
       (1-7)-Mas)axis. METHODS:Cardiac tissue of rats aged 1-2 d were collected,and primary cardiomyocytes were isolated and
        cultured. The gene silencing model of cardiomyocytes ACE2 was constructed. Experiments were divided into 12 groups. Among
        them,AngⅡ group,AngⅡ+ small interference RNA(siRNA)group,and AngⅡ+ A779 group were the model groups;AngⅡ+
        losartan group was positive control group;AngⅡ+Que40 group,AngⅡ+Que80 group,AngⅡ+siRNA+Que40 group,AngⅡ+
        siRNA+Que80 group,AngⅡ+A779+Que40 group and AngⅡ+A779+Que80 group were the experimental groups;blank group and
        siRNA group were set up. AngⅡ concentration was 1×10 -6  mol/L;siRNA final concentration was 50 nmol/L;Que concentration
        was 40 and 80 μmol/L;A779(Mas receptor inhibitor)concentration was 1 μmol/L;losartan concentration was 1×10  - 4  mol/L.
        mRNA and protein expression of ACE2,Ang-(1-7) and Mas in primary cardiomyocytes were detected;the expressions of
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        myocardial contractile proteins were also determined,such as Na /Ca 2 +  exchange channel(NCX),calcium pump(SERCA2a),
                                                           phosphoprotein (PLB). RESULTS: Compared with Ang Ⅱ
           Δ 基金项目:国家自然科学基金资助项目(No.81774049);国家重
                                                           group,mRNA expression of Mas was increased significantly
        点研发计划重点专项(No.2019YFC1710000,No.2019YFC1710003);
                                                           in Ang Ⅱ + Que80 group (P<0.05);mRNA expression of
        河南省高层次人才特殊支持“中原千人计划”-中原名医项目(No.
                                                           ACE2 and Mas were increased significantly in Ang Ⅱ +
        CZ0210-01)
                                                           losartan group(P<0.05). Compared with Ang Ⅱ group,the
           *硕士研究生。研究方向:中医药防治心血管疾病。E-mail:
        851136165@qq.com                                   protein expression of ACE2 and Ang-(1-7) were increased
           # 通信作者:教授,博士生导师,博士。研究方向:中医药防治心                  significantly in Ang Ⅱ + Que40 group (P<0.05);compared
        血管疾病。电话:0371-66233478。E-mail:zhumingjun317@163.com  with Ang Ⅱ + siRNA group,the protein expression of Ang-


        中国药房    2021年第32卷第23期                                             China Pharmacy 2021 Vol. 32 No. 23  ·2839 ·
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