Autophagy Drives Galectin-1 Secretion From Tumor-Associated Macrophages Facilitating Hepatocellular Carcinoma Progression.

Autophagy Drives Galectin-1 Secretion From Tumor-Associated Macrophages Facilitating Hepatocellular Carcinoma Progression.
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自噬驱动肿瘤相关巨噬细胞分泌半乳糖凝集素-1促进肝细胞癌进展

DOI:
10.3389/fcell.2021.741820
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发表时间:
2021
影响因子:
5.5
通讯作者:
Chang CP
Chang CP
中科院分区:
生物学2区
文献类型:
--
作者:
Davuluri GVN;Chen CC;Chiu YC;Tsai HW;Chiu HC;Chen YL;Tsai PJ;Kuo WT;Tsao N;Lin YS;Chang CP

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Galectin-1 (Gal-1) 是一种具有促肿瘤活性的分泌型凝集素,与肝细胞癌 (HCC) 的发展密切相关。尽管Gal-1是肿瘤微环境(TME)中众所周知的可溶性促肿瘤因子,但Gal-1的分泌模式尚不清楚。另一方面,除了癌细胞外,Gal-1在肿瘤基质细胞中广泛表达,包括肿瘤相关巨噬细胞(TAM)。 TAM 是 TME 中基质细胞的重要组成部分;然而,它们在为 TME 生产 Gal-1 方面的贡献仍未得到探索。在这里,我们揭示了 TAM 可以响应 HCC 细胞的刺激而主动分泌 Gal-1。 TAM 产生的 Gal-1 导致小鼠体内 Gal-1 的全身水平增加和 HCC 肿瘤生长。从机制上讲,TLR2 依赖性分泌性自噬被发现负责 TAM 中 Gal-1 的分泌。 Gal-1 作为自噬体的货物,在分泌前通过 Rab11 和 VAMP7 介导的囊泡运输与多囊泡体融合。 TAM 中这种自噬调节的 Gal-1 分泌与 HCC 患者较差的总生存率和无进展生存率相关。我们的研究结果揭示了 Gal-1 通过分泌性自噬的分泌模式,并强调了 TAM 产生的 Gal-1 在 HCC 进展中的病理作用。
Galectin-1 (Gal-1) is a secretory lectin with pro-tumor activities and is associated strongly with hepatocellular carcinoma (HCC) development. Although Gal-1 is a well-known soluble pro-tumor factor in the tumor microenvironment (TME), the secretion mode of Gal-1 is not clearly defined. On the other hand, in addition to cancer cells, Gal-1 is widely expressed in tumor stromal cells, including tumor-associated macrophages (TAMs). TAMs are a significant component of stromal cells in TME; however, their contributions in producing Gal-1 to TME are still not explored. Here we reveal that TAMs can actively secrete Gal-1 in response to stimuli of HCC cells. Gal-1 produced by TAMs leads to an increase of the systemic level of Gal-1 and HCC tumor growth in mice. Mechanistically, TLR2-dependent secretory autophagy is found to be responsible for Gal-1 secretion from TAMs. Gal-1 acts as a cargo of autophagosomes to fuse with multivesicular bodies via Rab11 and VAMP7-mediated vesicle trafficking before being secreted. This autophagy-regulated Gal-1 secretion in TAMs correlates to poor overall survival and progression-free survival rates of HCC patients. Our findings uncover the secretion mode of Gal-1 via secretory autophagy and highlight the pathological role of TAM-produced Gal-1 in HCC progression.
肿瘤相关巨噬细胞在肝细胞癌中的作用
DOI: 10.7150/jca.51346
发表时间: 2021
期刊: Journal of Cancer
影响因子: 3.9
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发表时间: 2021
影响因子: 4.7
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