中国全科医学 ›› 2021, Vol. 24 ›› Issue (17): 2207-2213.DOI: 10.12114/j.issn.1007-9572.2021.00.518

所属专题: 肿瘤最新文章合集 肺癌最新文章合集

• 专题研究 • 上一篇    下一篇

热疗对巨噬细胞M2极化作用及其对肺癌细胞侵袭、迁移影响的体外实验研究

饶紫琦,刘菁,陈炳林,邓永然,刘文其*   

  1. 530000广西南宁市,广西医科大学第二临床附属医院放疗科
    *通信作者:刘文其,教授,硕士研究生导师;E-mail:liuwenqigx@163.com
  • 出版日期:2021-06-15 发布日期:2021-06-15
  • 基金资助:
    广西自然科学基金资助项目(810187552024)

Effect of Hyperthermia on M2 Polarization of Macrophages and Invasion and Migration of Lung Cancer Cells:an in Vitro Experimental Study 

RAO Ziqi,LIU Jing,CHEN Binglin,DENG Yongran,LIU Wenqi*   

  1. Department of Radiotherapy,the Second Affiliated Hospital of Guangxi Medical University,Nanning 530000,China
    *Corresponding author:LIU Wenqi,Professor,Master supervisor;E-mail:liuwenqigx@163.com
  • Published:2021-06-15 Online:2021-06-15

摘要: 背景 热疗是一种安全的辅助治疗方法,通过抑制肿瘤细胞DNA修复、促进其凋亡、提高机体免疫等作用阻碍其发生、发展。但是,对于热疗是否可以通过干预巨噬细胞间接影响肿瘤细胞的研究并不多。目的 通过体外模拟热疗产生的温热作用,探讨在热疗条件下M2型肿瘤相关巨噬细胞对肺癌细胞(LLC)的调控作用。方法 本研究于2019年6—12月实施。10 000 ng/L的干扰素γ(INF-γ)和100 000 ng/L的脂多糖(LPS)诱导RAW264.7细胞48 h成为M1型巨噬细胞,20 000 ng/L 白介素(IL)-4诱导RAW264.7细胞48 h成为M2型巨噬细胞;通过流式细胞术和ELISA法分别检测M1、M2巨噬细胞表面标志抗原CD86、CD206的表达率和细胞因子IL-10、IL-12的分泌水平;采用CCK-8法检测不同热疗温度(41 ℃、42 ℃、43 ℃)干预对M2型巨噬细胞在24 h、48 h和72 h的增殖活性作用;采用实时荧光定量聚合酶链反应法(RT-PCR)检测M0、M2型巨噬细胞及热疗(42 ℃)后M2型巨噬细胞Arg-1、Fizz-1、Ym-1 mRNA相对表达水平;Western blotting法检测M2型巨噬细胞及热疗(42 ℃)后M2型巨噬细胞Arg-1、Fizz-1、Ym-1蛋白相对表达水平;Transwell法检测LLC+M2、LLC+M2+热疗(42 ℃)中LLC的侵袭、迁移能力。结果 IFN-γ和LPS可诱导RAW264.7细胞向M1型极化,IL-4可诱导RAW264.7细胞向M2型转化。流式细胞术检测结果显示,M2型巨噬细胞CD86、CD206的表达率高于M0型巨噬细胞和M1型巨噬细胞(P<0.001)。ELISA法检测结果显示,M2型巨噬细胞IL-10的分泌水平较M0、M1型巨噬细胞高(P<0.001);M1型巨噬细胞IL-12分泌水平较M0、M2型巨噬细胞高(P<0.001)。CCK-8法检测结果显示,42 ℃时热疗抑制巨噬细胞的能力高于41 ℃及43 ℃时(P<0.001)。RT-PCR检测结果显示,与M0型巨噬细胞相比,M2型巨噬细胞的Ym-1、Arg-1、Fizz-1 mRNA相对表达水平升高(P<0.001)。热疗(42 ℃)后M2型巨噬细胞的Ym-1、Arg-1 mRNA和蛋白相对表达水平降低(P<0.001)。Transwell法检测结果显示,M2型巨噬细胞与LLC共培养后LLC侵袭、迁移数量增加(P<0.001);热疗(42 ℃)后LLC侵袭、迁移数量减少(P<0.001)。结论 热疗可能通过下调M2型巨噬细胞的Arg-1、Ym-1 mRNA的表达水平从而抑制LLC的侵袭与迁移能力。

关键词: 肺肿瘤, 肿瘤, 热疗, RAW264.7, 巨噬细胞极化, 体外培养技术

Abstract: Background Hyperthermia is a safe adjuvant therapy that can suppress the occurrence and progression of tumor cells by inhibiting DNA repair,promoting cell apoptosis and improving immunity.However,little is known about whether hyperthermia can indirectly affect tumor cells by interfering with macrophages.Objective This study aimed to examine the regulatory efficacy of M2 macrophages on lung cancer cells(LCCs)under in vitro hyperthermia.Methods This study was implemented from June to December,2019.RAW264.7 cells were stimulated with interferon-γ(INF-γ,10 000 ng/L)+lipopolysaccharide(LPS,100 000 ng/L),and interleukin-4(IL-4,20 000 ng/L)for 72 h to induce M1 and M2 macrophages,respectively.The expression of surface antigens CD86 and CD206 in M1 and M2 macrophages were evaluated by flow cytometry.Secretion levels of IL-10 and IL-12 were measured by ELISA.Then,CCK-8 assay was used to detect the proliferation inhibition of M2 macrophages at 24,48 and 72 h after hyperthermia at different temperatures of 41℃,42℃ and 43℃.Real-time polymerase chain reaction(RT-PCR)and Western blotting were performed to determine the mRNA and protein expression of Arg-1,Fizz-1 and Ym-1 in M0 macrophages,M2 macrophages and M2 macrophages after hyperthermia(42 ℃),respectively.Transwell assay was utilized to measure the invasion and migration abilities of LCCs in LCCs+M2 and LCCs+M2+42℃ hyperthermia groups.Results IFN-γ+LPS-and IL-4-induced RAW264.7 cells were successfully transformed into M1 and M2 macrophages,respectively.Flow cytometry results showed that the expressions of CD86 and CD206 in M2 macrophages were higher than those in M0 and M1 macrophages(P<0.001).ELISA results revealed that the secretion level of IL-10 in M2 macrophages was higher than that of M0 and M1 macrophages(P<0.001).The secretion level of IL-12 in M1 macrophages was higher than that of M0 and M2 macrophages(P<0.001).Besides,we also found that the inhibition level of macrophages by hyperthermia at 42℃ was higher than that at 41℃ and 43℃(P<0.001).RT-PCR results showed that M0 macrophages,the mRNA expressions of Ym-1,Arg-1 and Fizz-1 in M2 macrophages were increased(P<0.001).But the mRNA and protein expressions of Ym-1 and Arg-1 in M2 macrophages were decreased after hyperthermia(42 ℃,P<0.001).In addition,compared with LCCs+M2 group,hyperthermia(42 ℃)significantly decreased the invasion and migration abilities of LCCs(P<0.001).Conclusion In summary,hyperthermia may inhibit the invasion and migration of LCCs by downregulating the mRNA expression of Arg-1 and Ym-1 in M2 macrophages.

Key words: Lung neoplasms, Neoplasms, Hyperthermia, RAW264.7, Macrophage polarization, Vitro techniques