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1.河南中医药大学中医药科学院,郑州 450046
2.河南中医药大学第一附属医院药学部,郑州 450052
硕士研究生。研究方向:中西医结合防治脑病。E-mail:634683991@qq.com
教授,博士生导师,博士。研究方向:中西医结合防治脑病。电话:0371-65680206。E-mail:zhangzhenqiang@126.com
收稿日期:2022-07-06,
修回日期:2022-11-16,
纸质出版日期:2023-01-15
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初双,吴延娆,吴丽敏,等.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[J].中国药房,2023,34(01):12-17.
CHU Shuang,WU Yanrao,WU Limin,et al.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[J].ZHONGGUO YAOFANG,2023,34(01):12-17.
初双,吴延娆,吴丽敏,等.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[J].中国药房,2023,34(01):12-17. DOI: 10.6039/j.issn.1001-0408.2023.01.03.
CHU Shuang,WU Yanrao,WU Limin,et al.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[J].ZHONGGUO YAOFANG,2023,34(01):12-17. DOI: 10.6039/j.issn.1001-0408.2023.01.03.
目的
2
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
2
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Aβ
1-42
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
2
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
2
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。
OBJECTIVE
2
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
2
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 Aβ
1-42
, 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
2
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
,
Lxrb
,
Abca1
,
Abcg1
,
Cd36
,
Sra
and
Apoe
in BV2 cells were increased significantly (
P
<0.05).
CONCLUSIONS
2
EEAM can promote the uptake and degradation of Aβ in microglia by activating PPAR-γ signaling pathway, thus improving Alzheimer’s disease.
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