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肿瘤相关巨噬细胞在转移性肾细胞癌患者中作为治疗靶点的新作用。

Emerging role of tumor-associated macrophages as therapeutic targets in patients with metastatic renal cell carcinoma.

机构信息

Medical Oncology, AOU Ospedali Riuniti, Polytechnic University of the Marche Region, via Conca 71, 60126, Ancona, Italy,

出版信息

Cancer Immunol Immunother. 2013 Dec;62(12):1757-68. doi: 10.1007/s00262-013-1487-6. Epub 2013 Oct 17.

Abstract

Tumor-associated macrophages (TAMs) derived from peripheral blood monocytes recruited into the renal cell carcinoma (RCC) microenvironment. In response to inflammatory stimuli, macrophages undergo M1 (classical) or M2 (alternative) activation. M1 cells produce high levels of inflammatory cytokines, such as tumor necrosis factor-α, interleukin (IL)-12, IL-23 and IL-6, while M2 cells produce anti-inflammatory cytokines, such as IL-10, thus contributing to RCC-related immune dysfunction. The presence of extensive TAM infiltration in RCC microenvironment contributes to cancer progression and metastasis by stimulating angiogenesis, tumor growth, and cellular migration and invasion. Moreover, TAMs are involved in epithelial-mesenchymal transition of RCC cancer cells and in the development of tumor resistance to targeted agents. Interestingly, macrophage autophagy seems to play an important role in RCC. Based on this scenario, TAMs represent a promising and effective target for cancer therapy in RCC. Several strategies have been proposed to suppress TAM recruitment, to deplete their number, to switch M2 TAMs into antitumor M1 phenotype and to inhibit TAM-associated molecules. In this review, we summarize current data on the essential role of TAMs in RCC angiogenesis, invasion, impaired anti-tumor immune response and development of drug resistance, thus describing the emerging TAM-centered therapies for RCC patients.

摘要

肿瘤相关巨噬细胞(TAMs)来源于外周血单核细胞,募集到肾细胞癌(RCC)微环境中。巨噬细胞在炎症刺激下发生 M1(经典)或 M2(替代)激活。M1 细胞产生高水平的炎症细胞因子,如肿瘤坏死因子-α、白细胞介素(IL)-12、IL-23 和 IL-6,而 M2 细胞产生抗炎细胞因子,如 IL-10,从而导致与 RCC 相关的免疫功能障碍。RCC 微环境中广泛存在的 TAM 浸润促进了癌症的进展和转移,通过刺激血管生成、肿瘤生长以及细胞迁移和侵袭。此外,TAMs 参与 RCC 癌细胞的上皮-间充质转化以及肿瘤对靶向药物的耐药性的发展。有趣的是,巨噬细胞自噬似乎在 RCC 中发挥重要作用。基于这种情况,TAMs 代表了 RCC 癌症治疗的一个有前途和有效的靶点。已经提出了几种策略来抑制 TAM 募集、减少其数量、将 M2 TAMs 转化为抗肿瘤 M1 表型以及抑制 TAM 相关分子。在这篇综述中,我们总结了 TAMs 在 RCC 血管生成、侵袭、受损的抗肿瘤免疫反应和药物耐药性发展中的重要作用的现有数据,从而描述了针对 RCC 患者的新兴以 TAM 为中心的治疗方法。

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