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南京医科大学学报(自然科学版)                                 第43卷第12期
               ·1630 ·                    Journal of Nanjing Medical University(Natural Sciences)  2023年12月


             ·基础研究·

              氯氮平对斑马鱼心脏发育的影响及机制研究



              黄凯玥 ,张 伟 ,朱玉婕 ,孙玉洁              1,2* ,袁  栎  2,3*
                     1,2
                                      3
                              3
               南京医科大学细胞生物学系,江苏省人类功能基因组学重点实验室,生物化学与分子生物学系,江苏                                   南京 211166
              1                      2                             3

             [摘    要] 目的:探索氯氮平(clozapine,CLP)对斑马鱼心脏发育的损伤效应及相关机制。方法:以 12.5 μmol/L 氯氮平(L⁃
              CLP)及25.0 μmol/L氯氮平(H⁃CLP)处理斑马鱼胚胎72 h,显微镜下检测心脏形态、心率、静脉窦⁃动脉球(sinus venosus⁃bulbus
              arteriosus,SV⁃BA)距离等指标;实时荧光定量聚合酶链反应(RT⁃PCR)检测心脏发育相关基因NKX2.5、Hand2及Cmlc2表达;此
              外,H⁃CLP 组处理 24 h 后,利用内质网抑制剂 4⁃苯基丁酸(4⁃phenylbutyric acid,4⁃PBA)或多巴胺 D2 受体抑制剂溴隐亭(bro⁃
              mocriptine,BRC)联合处理48 h后,统计心脏功能指标,检测内质网应激分子(Chop、Bip)及凋亡相关分子(Caspase3、Bax/Bcl2)
              的表达。结果:CLP剂量依赖性导致斑马鱼心脏结构及功能损伤,Chop、Bip和Caspase3、Bax/Bcl2的表达增加;4⁃PBA及BRC显
              著缓解CLP诱导的心脏损伤及Chop、Bip、Caspase3、Bax/Bcl2的高表达。结论:CLP导致斑马鱼心脏发育受损,可能与抑制多巴
              胺D2受体、激发内质网应激有关。
             [关键词] 氯氮平;心脏毒性;斑马鱼胚胎;内质网应激
             [中图分类号] Q344                    [文献标志码] A                        [文章编号] 1007⁃4368(2023)12⁃1630⁃06
              doi:10.7655/NYDXBNS20231202



              Study on the toxicity of clozapine to the heart development of zebrafish embryos
                                         3
                                                    3
                           1,2
                                                              1,2
              HUANG Kaiyue ,ZHANG Wei ,ZHU Yujie ,SUN Yujie ,YUAN Li     2,3*
                                       2
              1 Department of Cell Biology,Key Laboratory of Human Functional Genomics of Jiangsu Province,Department of
                                                                                                  3
              Biochemistry and Molecular Biology,Nanjing Medical University,Nanjing 211126,China
             [Abstract] Objective:To explore the potential damage effects and related mechanisms of clozapine(CLP)on the heart development
              of zebrafish. Method:12.5 μmol/L CLP(L⁃CLP)and 25.0 μmol/L CLP(H⁃CLP)were used to culture zebrafish embryos for 72 hours,
              respectively. The heart morphology,heart rate,and the distance between venous sinus and arterial bulb(SV⁃BA)were observed under
              microscope;The expression of cardiac development⁃related genes NKX2.5,Hand2 and Cmlc2 were detected by fluorescence quantitative
              PCR;In addition,after 24 hours of culture,the endoplasmic reticulum inhibitor 4⁃phenylbutyric acid(4⁃PBA)or dopamine D2 receptor
              inhibitor bromocriptine(BRC)were added to the H ⁃ CLP group for 48 hours. Then,we counted the cardiac function indicators,and
              detected the expression of endoplasmic reticulum stress genes(Chop、Bip)and apoptosis⁃related genes(Caspase3,Bax/Bcl2). Results:
              CLP induced damages of cardiac structure and function in a dose⁃dependent manner,induced the expression of Chop and Bip,and further
              increased the expression of Caspase3 and Bax/Bcl2. 4⁃PBA and BRC significantly alleviated CLP⁃induced cardiac injury and decreased
              the expression levels of Chop、Bip、Caspase⁃3 and Bax/Bcl2. Conclusion:CLP can damage the heart development of zebrafish,and the
              mechanism may be related to inhibiting dopamine D2 receptor and stimulating endoplasmic reticulum stress.
             [Key words] clozapine;cardiac toxicity;zebrafish embryo;endoplasmic reticulum stress
                                                                           [J Nanjing Med Univ,2023,43(12):1630⁃1635]




                  先天性心脏病(congenital heart disease,CHD)是         新生儿最常见的先天性异常疾病,并导致超过40%
                                                                           [1]
                                                                的产前死亡 。我国每年新发 CHD 的总经济负担
             [基金项目] 国家自然科学基金项目(81803644);江苏省高
                                                                超过 126 亿元,给患者家庭和社会带来巨大的医疗
              等学校自然科学研究重大项目(17KJA310001)
                                                                               [2]
              通信作者(Corresponding author),E⁃mail:yuanli@njmu.edu.cn;
              ∗                                                 负担和精神负担 。目前研究表明 CHD 是胚胎期
              yujiesun@njmu.edu.cn                              遗传与环境因素共同作用所导致。研究发现,孕期
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