巨噬细胞极化对血管平滑肌细胞PI3K/Akt/mTOR信号通路的影响  

Effect of macrophage polarization on PI 3 K/Akt/mTOR signaling pathway in vascular smooth muscle cells

作　　者：冯莹[1] 张妍 雷杰 刘娟[1] 方勇[1] 贺立群[1] FENG Ying;ZHANG Yan;LEI Jie;LIU Juan;FANG Yong;HE Liqun(Department of Cardiology,Wuhan First Hospital,Wuhan 430000,China)

机构地区：[1]武汉市第一医院心内科,武汉430000

出　　处：《中国免疫学杂志》2025年第2期315-319,共5页Chinese Journal of Immunology

基　　金：武汉市卫健委青年基金(WX21Q11)。

摘　　要：目的:探讨巨噬细胞极化对血管平滑肌细胞PI3K/Akt/mTOR信号通路和炎症反应的影响。方法:佛波酯诱导THP-1细胞成为巨噬细胞,分别用LPS和IFN-γ、IL-4和IL-13处理48 h,更换不含血清的新鲜培养基培养24 h,取上清作为条件培养基。将血管平滑肌细胞分成对照组、M0培养基组、M1培养基组和M2培养基组。CCK-8检测细胞增殖能力,流式细胞术检测细胞凋亡,ELISA检测细胞上清中炎症因子IL-1α、IL-6和TGF-β表达,RT-qPCR和Western blot检测血管平滑肌细胞中PI3K、Akt、mTOR mRNA和磷酸化蛋白表达。结果:与对照组相比,M0培养基组细胞增殖能力、细胞上清中TGF-β水平显著降低(P<0.01),细胞凋亡率、细胞上清中IL-1α和IL-6水平、细胞中PI3K、Akt、mTOR mRNA和蛋白磷酸化水平显著升高(P<0.01);与M0培养基组相比,M1培养基组细胞增殖能力、细胞上清中TGF-β水平显著降低(P<0.05),细胞凋亡率、细胞上清中IL-1α和IL-6水平、细胞中PI3K、Akt、mTOR mRNA和蛋白磷酸化水平显著升高(P<0.01),M2培养基组趋势相反(P<0.05)。结论:巨噬细胞极化能够通过调控PI3K/Akt/mTOR信号通路调节炎症细胞因子表达,参与动脉粥样硬化炎症反应。Objective:To investigate effects of macrophage polarization on PI3K/Akt/mTOR signaling pathway and inflammatory response of vascular smooth muscle cells.Methods:THP-1 cells were induced to become macrophages by phaboate,then treated with LPS and IFN-γ,IL-4 and IL-13 for 48 h,and cultured with fresh medium without serum for 24 h.Supernatant was used as conditioned medium.Vascular smooth muscle cells were divided into control group,M0 medium group,M1 medium group and M2 medium group.CCK-8 was used to detect cell proliferation,flow cytometry was used to detect cell apoptosis,ELISA was used to detect expressions of inflammatory cytokines IL-1α,IL-6 and TGF-βin supernatant of cells,and mRNA and phosphorylated protein expressions of PI3K,Akt and mTOR in vascular smooth muscle cells were detected by RT-qPCR and Western blot.Results:Compared with control group,cell proliferation ability and TGF-βlevel in supernatant of M0 medium group were significantly decreased(P<0.01),apoptosis rate,IL-1αand IL-6 levels in cell supernatant,mRNA and protein phosphorylation levels of PI3K,Akt and mTOR in cells were significantly increased(P<0.01).Compared with M0 medium group,cell proliferation ability and TGF-βlevel in supernatant of M1 medium group were significantly decreased(P<0.05),apoptosis rate,IL-1αand IL-6 levels in cell supernatant,mRNA and protein phosphorylation levels of PI3K,Akt and mTOR in cells were significantly increased(P<0.01),the trend was opposite in M2 medium group(P<0.05).Conclusion:Macrophage polarization can regulate expressions of inflammatory cytokines by regulating PI3K/Akt/mTOR signaling pathway,and participate in inflammatory response in atherosclerosis.

关 键 词：巨噬细胞极化 动脉粥样硬化 PI3K/Akt/mTOR信号通路 

分 类 号：R392[医药卫生—免疫学]