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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,
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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
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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