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基于SREBPs通路的益肾通络方改善脂质代谢异常作用机制研究
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          赵 靓 ,张效威 ,谢治深 ,向世勰 ,段亚飞 ,高 改 ,王 潘 ,马慧芬 ,孙意冉 ,陈 洁 ,徐江雁 ,张振强                                        1 #
         (1.河南中医药大学中医药科学院,郑州 450046;2.马来西亚管理与科技大学国际学术部,马来西亚 雪兰莪州
          莎阿南市 47300)
          中图分类号  R965      文献标志码  A      文章编号  1001-0408(2023)23-2835-06
          DOI  10.6039/j.issn.1001-0408.2023.23.04
          摘  要  目的  基于固醇调节元件结合蛋白(SREBPs)通路探究益肾通络方改善脂质代谢异常的作用机制。方法  以C57BLKS/J
         (db/db)小鼠为模型动物、 C57BLKS/J(db/m)小鼠为正常对照,通过测定小鼠肝脏系数及血清中总胆固醇(TC)、甘油三酯(TG)、低
          密度脂蛋白(LDL)、高密度脂蛋白(HDL)含量,观察小鼠肝组织脂肪变性和脂质蓄积情况,测定小鼠肝组织中SREBP-1、SREBP-2
          蛋白和 Srebp-1c、Srebp-2 及其下游脂质代谢相关靶基因(Fasn、Acc1、Scd5、Fads1、Hmgcr、Dhcr24、Insig-1、Fdps)的 mRNA 转录水
          平,来考察1、2.5、5 g/kg益肾通络方改善db/db小鼠脂质代谢异常的作用机制。以低脂培养的人肝癌细胞HepG2为体外脂质代谢
          异常细胞模型,以25-HC(SREBPs抑制剂,10 μmol/L)为抑制剂对照,考察125、250、500 μg/mL益肾通络方干预24 h后对细胞中
          SREBP-1、SREBP-2 蛋白和 SREBP-1c、SREBP-2 其下游脂质代谢相关靶基因 mRNA 转录水平的影响,进行体外机制验证。结果
          1、2.5、5 g/kg益肾通络方均可显著降低模型小鼠TC、TG、LDL水平,显著降低肝组织脂滴阳性面积百分比、肝脏系数,显著下调肝
          组织中 Pre-SREBP-1、n-SREBP-1、Pre-SREBP-2、n-SREBP-2 蛋白以及 Srebp-1c、Srebp-2 及其下游靶基因的 mRNA 转录水平,并可
          显著升高HDL水平,差异均有统计学意义(P<0.05或P<0.01)。体外细胞实验中,125、250、500 μg/mL益肾通络方作用24 h后细
          胞中上述蛋白及基因的表达的变化与动物实验一致,且抑制剂对照与250、500 μg/mL益肾通络方给药后细胞中上述蛋白和基因
          表达水平相比差异均无统计学意义(P>0.05)。结论  益肾通络方可能通过调控转录因子SREBPs表达,进而抑制脂肪酸及胆固醇
          合成相关基因的高表达,促进TC、TG的降解,改善脂质代谢异常,抑制脂质蓄积,从而发挥降脂作用。
          关键词  益肾通络方;脂质代谢异常;固醇调节元件结合蛋白;脂质蓄积;转录因子

          Study  on  the  mechanism  of  Yishen  tongluo  formula  improving  abnormal  lipid  metabolism  based  on
          SREBPs pathway
          ZHAO Liang ,ZHANG Xiaowei ,XIE Zhishen ,XIANG Shixie ,DUAN Yafei ,GAO Gai ,WANG Pan ,MA
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          Huifen ,SUN Yiran ,CHEN Jie ,XU Jiangyan ,ZHANG Zhenqiang(1. Academy  of  Chinese  Medical  Sciences,
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          Henan  University  of  Chinese  Medicine,  Zhengzhou  450046,  China;2.  International  Academic  Affairs
          Department, Management and Science University, Selangor Darul Ehsan Shah Alam 47300, Malaysia)
          ABSTRACT   OBJECTIVE  To  explore  the  mechanism  of  Yishen  tongluo  formula (YSTLF)  in  improving  abnormal  lipid
          metabolism  based  on  the  sterol  regulatory  element  binding  proteins (SREBPs)  pathway.  METHODS  Using  C57BLKS/J (db/db)
          mice  as  model  and  C57BLKS/J (db/m)  mice  as  normal  control,  the  mechanism  of  1,  2.5  and  5  g/kg YSTLF  improving  abnormal
          lipid metabolism of db/db mice was investigated by determining the liver coefficient, the contents of serum total cholesterol (TC),
          triglyceride (TG), low-density lipoprotein (LDL) and high-density lipoprotein (HDL), observing steatosis and lipid accumulation
          in liver tissue of mice, detecting the protein expressions of SREBP-1 and SREBP-2 as well as mRNA transcription levels of Srebp-
          1c,  Srebp-2  and  their  downstream  lipid  metabolism-related  target  genes (Fasn,  Acc1,  Scd5,  Fads1,  Hmgcr,  Dhcr24,  Insig-1,
          Fdps)  in  liver  tissue  of  mice.  Using  low-fat  cultured  human  liver  cancer  cell  HepG2  as  an  in  vitro  cell  model  for  abnormal  lipid
          metabolism, and 25-HC (SREBPs inhibitor, 10 μmol/L) as the control, the effects of 125, 250 and 500 μg/mL YSTLF on protein
          expressions  of  SREBP-1  and  SREBP-2  as  well  as  mRNA  transcription  of  SREBP-1c,  SREBP-2  and  their  downstream  lipid
          metabolism-related target genes were investigated to verify the mechanism in vitro. RESULTS 1, 2.5, 5 g/kg YSTLF significantly
                                                             reduced  the  levels  of  TC,  TG  and  LDL,  the  percentage  of
             Δ 基金项目 国家重点研发计划项目(No.2020YFE0201800);河南         lipid  droplet-positive  region  in  liver  tissue  and  liver
          省重点研发专项(No.221111520300);河南省重点研发与推广专项(科
                                                             coefficient,  significantly  down-regulated  protein  expressions  of
          技攻关)(No.232102310454)                              Pre-SREBP-1,  n-SREBP-1,  Pre-SREBP-2  and  n-SREBP-2,
             *第一作者 硕士研究生。研究方向:中西医结合治疗慢性代谢性
          疾病。E-mail:525651451@qq.com                         and  mRNA  transcription  of  Srebp-1c,  Srebp-2  and  their
             # 通信作者 教授,博士生导师,博士。研究方向:中西医结合防治                 downstream  target  genes  in  liver  tissue,  while  significantly
          重大慢性代谢性疾病。E-mail:zhang_zhenqiang@126.com           increased  HDL  level,  with  statistical  significance (P<0.05  or


          中国药房  2023年第34卷第23期                                              China Pharmacy  2023 Vol. 34  No. 23    · 2835 ·
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