基础医学与临床 ›› 2023, Vol. 43 ›› Issue (12): 1808-1813.doi: 10.16352/j.issn.1001-6325.2023.12.1808

• 研究论文 • 上一篇    下一篇

miR-34a对高糖状态下小鼠巨噬细胞系RAW264.7极化及炎性因子分泌的影响

张凤云, 赵志浩, 张卓琦*   

  1. 徐州医科大学附属医院 心内科, 江苏 徐州 221000
  • 收稿日期:2022-05-15 修回日期:2022-12-31 出版日期:2023-12-05 发布日期:2023-11-29
  • 通讯作者: * zhuoqizhang@sina.com
  • 基金资助:
    徐州市推动科技创新项目(KC19062)

Effects of miR-34a on polarization and inflammatory factor content of mouse macrophage cell line RAW264.7 under high glucose conditions

ZHANG Fengyun, ZHAO Zhihao, ZHANG Zhuoqi*   

  1. Department of Cardiology, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221000, China
  • Received:2022-05-15 Revised:2022-12-31 Online:2023-12-05 Published:2023-11-29
  • Contact: * zhuoqizhang@sina.com

摘要: 目的 探讨微小RNA-34a(miR-34a)对高糖条件下小鼠巨噬细胞系极化和炎性因子表达的影响。方法 将小鼠巨噬细胞在高糖条件下(25 mmol/L)下培养3至28 d, RT-qPCR检测高糖培养时巨噬细胞中miR-34a表达及M1巨噬细胞标志物(iNOS和MCP-1)和 M2巨噬细胞标志物(Arg-1)的基因表达。转染miR-34a模拟物或抑制剂后,ELISA检测炎性相关因子(IL-6、IL-1β和TNF-α)的分泌。Western blot检测miR-34a靶蛋白1型跨膜糖蛋白Notch1的表达。结果 在高糖条件下,巨噬细胞中miR-34a以及M1型巨噬细胞标志物(iNOS和MCP-1)基因表达量逐渐增长。过表达miR-34a后,促炎因子IL-6、IL-1β和TNF-α分泌增加,iNOS和MCP-1 基因表达量也明显增加,而沉默miR-34a的表达后,炎性因子(IL-6、IL-1β和TNF-α)分泌及M1型巨噬细胞标记物(iNOS和MCP-1)的表达量降低(P<0.05)。沉默Notch1表达后,miR-34a及IL-6、IL-1β和TNF-α分泌及iNOS和MCP-1表达量下降。结论 慢性高糖刺激miR-34a表达,后者促进巨噬细胞向M1型极化和促炎因子的分泌。

关键词: miR-34a, 巨噬细胞, 高糖, 极化, 炎性反应

Abstract: Objective To detect the role of miR-34a on macrophage inflammation and polarization under high glucose conditions. Methods Mouse macrophages were collected and cultured during high glucose for 3-28 days. RT-qPCR was used to detect the expression of miR-34a, iNOS, MCP-1 and Arg-1 mRNA. Then miR-34a was over-expressed or silenced, ELISA was used to detect the expression of IL-6, IL-1β,TNF-α and qRT-PCR was used to detect the expression of iNOS and MCP-1 mRNA. Western blot was used to detect the expression of Notch1. Results Expression of miR-34a increased under high glucose conditions in RAW264.7 cells continuously. Over-expression of miR-34a promoted the expression of MCP-1 and iNOS observed by RT-qPCR and increased the expression of IL-6, IL-1β and TNF-α detected by ELISA. Further studies showed that siRNA-Notch1 down-regulated the expression of miR-34a, MCP-1, iNOS, IL-6, IL-1β and TNF-α. Conclusions Chronic high glucose condition stimulates the expression of miR-34a which promotes M1 macrophage polarization and releasing of pro-inflammatory factors.

Key words: miR-34a, macrophage, high glucose, polarization, inflammation

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