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·药学研究·


          白术乙醇提取物调节PPAR-γ信号通路促进小胶质细胞摄取及降
          解Aβ的作用机制研究                         Δ



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          初 双 ,吴延娆 ,吴丽敏 ,崔正浩 ,王 潘 ,孙意冉 ,谢治深 ,张振强 (1.河南中医药大学中医药科学院,
                                           1
                           2
          郑州 450046;2.河南中医药大学第一附属医院药学部,郑州 450052)
          中图分类号  R965      文献标志码  A      文章编号  1001-0408(2023)01-0012-07
          DOI  10.6039/j.issn.1001-0408.2023.01.03
          摘   要  目的  基于过氧化物酶体增殖物激活受体γ(PPAR-γ)信号通路研究白术乙醇提取物(EEAM)促进小胶质细胞摄取及降
          解 β 淀粉样蛋白(Aβ)的作用机制。方法  以小鼠神经小胶质细胞BV2为研究对象,采用激光共聚焦荧光显微镜观察EEAM(低、
          中、高剂量分别为0.3、0.4、0.5 mg/mL,下同)对细胞摄取和降解Aβ的影响;利用人胚胎肾细胞HEK293考察EEAM对PPAR-γ萤光
          素酶转录活性的影响;采用免疫荧光法考察EEAM对PPAR-γ核移位的影响;以Aβ1-42诱导阿尔茨海默病BV2细胞模型,并采用定
          量聚合酶链式反应法考察 EEAM 对 PPAR-γ 下游靶基因(Lxra、Lxrb、Abca1、Abcg1、Cd36、Sra 和 Apoe)mRNA 表达的影响。结果
          Aβ摄取实验结果显示,经中、高剂量EEAM干预后,BV2细胞中Aβ荧光强度均显著升高(P<0.05);Aβ降解实验结果显示,经中、
          高剂量EEAM干预后,BV2细胞中Aβ荧光强度均显著降低(P<0.05)。经各剂量EEAM干预后,HEK293细胞中PPAR-γ萤光素
          酶转录活性均显著升高(P<0.05),BV2细胞中和细胞核中PPAR-γ蛋白的荧光强度(低剂量组除外)均显著升高(P<0.05),BV2
          细胞中 Lxra、Lxrb、Abca1、Abcg1、Cd36、Sra、Apoe mRNA 的表达水平均显著升高(P<0.05)。结论  EEAM 可通过激活 PPAR-γ 信
          号通路,促进小胶质细胞对Aβ的摄取与降解作用,进而改善阿尔茨海默病。
          关键词  白术乙醇提取物;过氧化物酶体增殖物激活受体γ;小胶质细胞;β淀粉样蛋白;阿尔茨海默病

          Study  on  the  promotion  effect  mechanism  of  ethanol  extract  from Atractylodes  macrocephala  on  microglia
          phagocytosis and degradation of Aβ based on regulating PPAR-γ signaling pathway
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          CHU Shuang ,WU Yanrao ,WU Limin ,CUI Zhenghao ,WANG Pan ,SUN Yiran ,XIE Zhishen ,ZHANG
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          Zhenqiang(1.  Academy  of  Chinese  Medicine  Sciences,  Henan  University  of  Chinese  Medicine,  Zhengzhou
                   1
          450046,  China;2.  Dept.  of  Pharmacy,  the  First Affiliated  Hospital  of  Henan  University  of  Chinese  Medicine,
          Zhengzhou 450052, China)
          ABSTRACT    OBJECTIVE  To  explore  the  effect  mechanism  of  ethanol  extract  from  Atractylodes  macrocephala (EEAM)  on
          microglial  phagocytosis  and  degradation  of  amyloid  β (Aβ)  based  on  peroxisome  proliferator-activated  receptor  γ (PPAR- γ)
          signaling  pathway.  METHODS  Taking  neuromicroglial  cell  BV2  as  subjects,  confocal  microscopy  was  used  to  observe  the  effects
          of  EEAM (0.3,  0.4,  0.5  mg/mL,  similarly  hereinafter)  on  phagocytosis  and  degradation  of  Aβ  in  microglia.  Human  embryonic
          kidney  cell  HEK293  was  used  to  investigate  the  effects  of  EEAM  on  luciferase  transcriptional  activity  of  PPAR-γ.  The  effect  of
          EEAM  on  nuclear  translocation  of  PPAR- γ  was  investigated  by  immunofluorescence.  Alzheimer’s  disease  BV2  cell  model  was
          induced by Aβ1-42, and quantitative polymerase chain reaction was used to investigate the effects of EEAM on mRNA expressions of
          PPAR- γ  downstream  target  genes (Lxra,  Lxrb,  Abca1,  Abcg1,  Cd36,  Sra  and  Apoe).  RESULTS  The  results  of  Aβ  uptake
          experiment  showed  that  after  the  intervention  of  medium  and  high  doses  of  EEAM,  fluorescence  intensity  of  Aβ  in  BV2  cells
          increased  significantly (P<0.05). The  degradation  experiment  of Aβ  showed  that  after  the  intervention  of  medium  and  high  doses
          of EEAM, fluorescence intensity of Aβ in BV2 cells decreased significantly (P<0.05). After the intervention of different doses of
          EEAM,  luciferase  transcriptional  activity  of  PPAR-γ  in  HEK293  cells  increased  significantly (P<0.05);  fluorescence  intensity  of
                                                              PPAR-γ  in  BV2  cells  and  nuclei (except  for  low-dose  group)
                                                              increased significantly (P<0.05). mRNA expressions of Lxra,
              Δ 基金项目 国家自然科学基金资助项目(No.82274612);河南省
                                                              Lxrb, Abca1, Abcg1,  Cd36,  Sra  and Apoe  in  BV2  cells  were
          高校科技创新人才支持计划项目(No.22HASTIT048);河南省高校科
                                                              increased  significantly (P<0.05).  CONCLUSIONS  EEAM
          技创新团队支持计划(No.21IRTSTHN026);河南省高等学校青年骨干
          教师培养计划项目(No.2021GGJS081)                            can  promote  the  uptake  and  degradation  of  Aβ  in  microglia
             *第一作者 硕士研究生。研究方向:中西医结合防治脑病。E-                    by  activating  PPAR-γ  signaling  pathway,  thus  improving
          mail:634683991@qq.com                               Alzheimer’s disease.
              # 通信作者 教授,博士生导师,博士。研究方向:中西医结合防治                 KEYWORDS    ethanol  extract  from  Atractylodes  macrocephala;
          脑病。电话:0371-65680206。E-mail:zhangzhenqiang@126.com   PPAR-γ; microglia; amyloid β; Alzheimer’s disease


          · 12 ·    China Pharmacy  2023 Vol. 34  No. 1                                中国药房  2023年第34卷第1期
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