基础医学与临床 ›› 2019, Vol. 39 ›› Issue (10): 1432-1436.

• 研究论文 • 上一篇    下一篇

SRPX2经uPAR调控人单核细胞系THP-1来源巨噬细胞迁移及M2极化

刘揆亮1,李楠杉1,吴静2,李文坤1,李倩2,劳月琼1   

  1. 1. 首都医科大学附属北京世纪坛医院
    2. 首都医科大学附属北京世纪坛医院消化内科
  • 收稿日期:2018-12-26 修回日期:2019-06-03 出版日期:2019-10-05 发布日期:2019-09-25
  • 通讯作者: 吴静 E-mail:liqian39@163.com
  • 基金资助:
    北京市自然科学基金;北京市优秀人才培养项目;北京市医管局“青苗”计划

Role of SRPX2/uPAR in controlling human monocytes THP-1 originated macrophage migration and M2 polarization

  • Received:2018-12-26 Revised:2019-06-03 Online:2019-10-05 Published:2019-09-25
  • Contact: Jing 无Wu E-mail:liqian39@163.com

摘要: 目的:评价SRPX2 蛋白对人单核细胞系THP-1来源巨噬细胞迁移及极化功能的影响。方法:经佛波酯(PMA)诱导人单核细胞系THP-1为巨噬细胞后,将SRPX2重组蛋白作用于巨噬细胞,Transwell法检测细胞迁移,免疫荧光法检测SRPX2与uPAR的定位,Western blot检测相应信号通路蛋白的表达。再用IFN-γ及LPS诱导巨噬细胞的M1极化,SRPX2重组蛋白作用后,逆转录PCR检测M1/M2标志物表达。结果: SRPX2明显促进人单核细胞系THP-1来源巨噬细胞的迁移 (p<0.01), 加入uPAR中和抗体后,明显抑制迁移(p<0.01)。在诱导M1极化的巨噬细胞中,经SRPX2重组蛋白作用后,M1标志物CD40和IL-6明显下降,而M2标志物CD206和IL-6明显上升(p<0.01)。SRPX2与uPAR及CD11b的表达存在共定位。SRPX2重组蛋白作用后巨噬细胞FAK及Akt磷酸化水平增高。结论:SRPX2可能通过uPAR/CD11b/FAK/Akt通路促进人单核细胞THP-1来源巨噬细胞的迁移与M2极化。

关键词: 含sushi重复蛋白X连锁2(SRPX2), 巨噬细胞, 迁移, 极化

Abstract: Objective To investigate the effect of SRPX2 protein on migration and polarization of human monocytes THP-1 derived macrophages. Methods PMA was used to induce macrophages derived from human THP-1 cells. Transwell , immunoflurescence and Western blot were used to determine the cell immigration, signal protein level and location of SRPX2 and uPAR respectively. After SRPX2 was added. IFN-γand LPS was used to induce M1 polarization cells, RT-PCR was used to measure M1/M2 markers. Results The migration of THP-1 derived macrophages were significantly increased by SRPX2 (p<0.01) and antagonized by uPAR neutralization antibody (p<0.01). SRPX2 markedly promoted the expression of CD206/IL-6, while decreased the expression of CD40/IL-6 (both p<0.01). The colocalization of SRPX2/uPAR/CD11b was confirmed. The phosphorylation of FAK and Akt was activated by SRPX2. Conclusions SRPX2 may promote the migration and M2 polarization of human monocytes THP-1 originated macrophage via uPAR/CD11b/FAK/Akt pathway.

Key words: SRPX2, macrophages, migration, polarization