Macrophage-derived CCL22 promotes an immunosuppressive tumor microenvironment via IL-8 in malignant pleural effusion

Macrophage-derived CCL22 promotes an immunosuppressive tumor microenvironment via IL-8 in malignant pleural effusion
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巨噬细胞衍生的 CCL22 通过 IL-8 在恶性胸腔积液中促进免疫抑制肿瘤微环境

DOI:
10.1016/j.canlet.2019.03.040
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发表时间:
2019-01-01
期刊:
影响因子:
9.7
通讯作者:
Zhang, Yi
Zhang, Yi
中科院分区:
医学1区
文献类型:
--
作者:
Wang, Dong;Yang, Li;Zhang, Yi

文献摘要

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免疫功能障碍常发生在恶性胸腔积液(MPE)中。在我们之前的研究中,主要源自巨噬细胞的 TGF-β 在削弱 MPE 中 T 细胞的细胞毒性方面发挥着重要作用。因此,我们的目的是研究其他免疫调节细胞和因子是否介导巨噬细胞分泌TGF-β,参与MPE的免疫抑制微环境,并为MPE的潜在免疫治疗提供线索。我们发现 MPE 中的 CCL22 水平显着高于非恶性胸腔积液。高水平的 CCL22 与 MPE 肺癌患者的不良生存密切相关。 MPE 中 CCL22 主要由肿瘤相关巨噬细胞 (TAM) 产生。同时,TAM 衍生的 TGF-β 通过 c-Fos 介导 TAM 中的 CCL22 表达。 CCL22 促进 MPE 中调节性 T 细胞 (Treg) 的募集。最后,Treg 分泌的高水平 IL-8 进一步诱导 TAM 产生 TGF-β,并促进 MPE 中的免疫抑制肿瘤微环境。我们的结果表明,巨噬细胞衍生的 CCL22 通过 MPE 中的 IL-8 在免疫抑制肿瘤微环境中发挥重要作用。
Immune dysfunction often occurs in malignant pleural effusion (MPE). In our previous study, TGF-beta derived predominantly from macrophages plays an important role in impairing T cell cytotoxicity in MPE. Therefore, we aimed to investigate whether other immunoregulatory cells and factors mediated TGF-beta secretion from macrophages, involved in the immunosuppressive microenvironment of MPE, and to provide clues for potential immune therapy for MPE as well. We found that CCL22 level in MPE was significantly higher than that in nonmalignant pleural effusion. The high level of CCL22 was closely associated with poor survival in MPE patients with lung cancer. CCL22 was dominantly produced by tumor-associated macrophages (TAMs) in MPE. Meanwhile, TAM-derived TGF-beta, mediated CCL22 expression in TAMs via c-Fos. CCL22 promoted the recruitment of regulatory T cells (Tregs) in MPE. Lastly, Treg-secreted high level of IL-8 further induced TGF-beta production from TAMs, and promoted the immunosuppressive tumor microenvironment in MPE. Our results indicate that macrophage-derived CCL22 plays an important role in the immunosuppressive tumor microenvironment via IL-8 in MPE.