- 中国精品科技期刊
- 中国高校百佳科技期刊
- 中国中文核心期刊
- 中国科学引文数据库核心期刊
| Citation: |
WU Lingxi, DU Yixuan, GAO Xiangdong. Inhibitory effect of IL-27 on the overactivation of microglia[J]. J China Pharm Univ, 2024, 55(6): 801 − 808. DOI: 10.11665/j.issn.1000-5048.2024022702
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Neuroinflammation mediated by microglia is essential for the occurrence and development of Alzheimer’s disease (AD). Through the analysis of the GEO database, it was found that IL-27 expression decreased in both the cerebral cortex and hippocampus of AD patients. In this study, the AD cell model of BV-2 cells injured by Aβ1-42, the inflammatory cell model of BV-2 cells damaged by LPS, and the inflammatory animal model were established and the effects of IL-27 after its administration in the above models in regulating microglial phenotype and neuroinflammation were evaluated. In the animal models, the number of Iba1+ microglia in the hippocampus was detected by immunohistochemistry, the expression of pro-inflammatory factors such as TNF-α, IL-1β and IL-6 was detected by qPCR, ELISA and Western blot, and the expression of M1/M2 phenotypic markers in microglia was detected by qPCR. To further explore the action mechanism of IL-27, Western blot was used to detect the expression levels of NF-κB, p-NF-κB, IκBα and p-IκBα in microglia after administration of IL-27 and Aβ1-42. The results showed that IL-27 alleviated the abnormal activation of microglia induced by lipopolysaccharide (LPS), decreased the expression of pro-inflammatory factors such as TNF- α, IL-1β and IL-6, transformed microglia induced by LPS or Aβ1-42 from neurotoxic M1 to neuroprotective M2, and improved the abnormal phosphorylation of NF-κB and IκBα induced by Aβ1-42. The research suggested that IL-27 can regulate the M1/M2 polarization of microglia induced by Aβ1-42 or LPS, and alleviate neuroinflammation.
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