miR-487a通过靶向调控TIA1对胃癌肿瘤相关巨噬细胞M2型极化的抑制作用  

Inhibitory effect of miR-487a on M2-type polarization of gastric cancer tumor-associated macrophages by targeting TIA1

作　　者：曲颜 戴霖 王彪 阮笃激 钟裕昌 杨雪峰 QU Yan;DAI Lin;WANG Biao;RUAN Duji;ZHONG Yuchang;YANG Xuefeng(Department of Gastrointestinal Surgery,Second Affiliated Hospital,Zunyi Medical University,Zunyi 563006,China;Department of Gastrointestinal Surgery,Affiliated Hospital,Zunyi Medical University,Zunyi 563000,China)

机构地区：[1]遵义医科大学第二附属医院胃肠外科,贵州遵义563006 [2]遵义医科大学附属医院胃肠外科,贵州遵义563000

出　　处：《吉林大学学报（医学版）》2024年第3期728-738,共11页Journal of Jilin University：Medicine Edition

基　　金：贵州省科技厅科技计划项目(黔科合基础[2020]1Y335)。

摘　　要：目的:探讨微小RNA(miR)-487a对胃癌肿瘤相关巨噬细胞(TAMs) M2型极化的抑制作用,并阐明其对胃癌AGS细胞增殖、侵袭和迁移的影响。方法:分离和培养原发性胃癌患者胃癌组织TAMs及癌旁组织来源的正常巨噬细胞(NTMs),体外诱导人单核细胞THP-1分化为TAMs,将分化得到的M0、M1和M2型巨噬细胞经条件培养基(CM)刺激培养24 h,分别获取TAMs、M1-TAMs和M2-TAMs。转染TAMs,分为空白组、 inhibitor-NC组、 miR-487a inhibitor组、 miR-487a inhibitor+si-NC组和miR-487ainhibitor+si-TIA1组,采用实时荧光定量PCR(RT-qPCR)法和Western blotting法验证转染效率。将M2-TAMs与AGS细胞共培养,分为AGS组、AGS+inhibitor-NC组、AGS+miR-487ainhibitor组、AGS+miR-487ainhibitor+si-NC组和AGS+miR-487ainhibitor+si-TIA1组,RT-qPCR法检测胃癌组织TAMs和癌旁组织NTMs及各组TAMs中miR-487a和T淋巴细胞胞浆内抗原-1(TIA1) mRNA表达水平,Western blotting法检测胃癌组织TAMs和癌旁组织NTMs及各组TAMs中TIA1蛋白表达水平,流式细胞术检测各组TAMs中CD206和CD163水平,酶联免疫吸附试验(ELISA)法检测各组TAMs培养上清中白细胞介素10(IL-10)、转化生长因子β(TGF-β)、血管内皮生长因子A(VEGF-A)和精氨酸酶1(Arg-1)水平,CCK-8法检测各组AGS细胞增殖活性,细胞划痕实验检测各组AGS细胞迁移率,Transwell实验检测各组AGS细胞侵袭细胞数。结果:RT-qPCR法,与癌旁组织NTMs比较,胃癌组织TAMs中miR-487a表达水平明显升高(P<0.01),TIA1 mRNA表达水平明显降低(P<0.01);与TAMs比较,M1-TAMs中miR-487a表达水平明显降低(P<0.01),TIA1 mRNA表达水平明显升高(P<0.01);M2-TAMs中miR-487a表达水平明显升高(P<0.01),TIA1 mRNA表达水平明显降低(P<0.01);转染后,与空白组和inhibitor-NC组比较,miR-487a inhibitor组细胞中miR-487a表达水平明显降低(P<0.01),提示细胞转染成功。Western blotting法,与癌旁组织NTMs比较,胃癌组织TAMs中TIA1蛋白表达水平明显降低(P<0.01);与TAMs比较,Objective:To discuss the inhibitory effect of microRNA-487a(miR-487a) on the M2 polarization of tumor-associated macrophages(TAMs) in gastric cancer,and to clarify its effect on the proliferation,invasion,and migration of the gastric cancer AGS cells.Methods:The TAMs from gastric cancer tissue and adjacent normal tissue macrophages(NTMs) from adjacent tissue of the primary gastric cancer patients were isolated and cultured.The human monocyte THP-1 cells were induced in vitro to differentiate into TAMs,and the differentiated M0,M1,and M2 macrophages were cultured for 24 h by conditioned medium(CM) to obtain the TAMs,M1-TAMs,and M2-TAMs respectively.The TAMs were transfected and then divided into blank group,inhibitor-NC group,miR-487a inhibitor group,miR-487a inhibitor+si-NC group,and miR-487a inhibitor+si-TIA1 group.The transfection efficiencies of the cells in various groups were detected by real-time fluorescence quantitative PCR(RT-qPCR) and Western blotting methods.The M2-TAMs were co-cultured with the AGS cells,and divided into AGS group,AGS+inhibitor-NC group,AGS+miR-487a inhibitor group,AGS+miR-487a inhibitor+si-NC group,and AGS+miR-487a inhibitor+si-TIA1 group.RT-qPCR method was used to detect the expression levels of miR-487a and lymphocyte intracytoplasmic antigen-1(TIA1) mRNA in TAMs from gastric cancer tissue and NTMs from adjacent normal tissue in various groups;Western blotting method was used to detect the expression level of TIA1 protein in TAMs from gastric cancer tissue and NTMs from adjacent normal tissue and TAMs in various groups;flow cytometry was used to detect the levels of CD206 and CD163 in TAMs in various groups;enzyme-linked immunosorbent assay(ELISA) was used to detect the levels of interleukin-10(IL-10),transforming growth factor-beta(TGF-β),vascular endothelial growth factor A(VEGF-A),and arginase-1(Arg-1) in culture supernatant of the TAMs cells;CCK-8 assay was used to detect the proliferative activity of the AGS cells in various groups;wound healing assay was used to detect the m

关 键 词：胃肿瘤 微小RNA-487a T淋巴细胞内抗原1 肿瘤相关巨噬细胞 M2型极化 

分 类 号：R735.2[医药卫生—肿瘤]