Ligustilide counteracts carcinogenesis and hepatocellular carcinoma cell-evoked macrophage M2 polarization by regulating yes-associated protein-mediated interleukin-6 secretion

巨噬细胞极化 肿瘤微环境 癌症研究 川地163 M2巨噬细胞 巨噬细胞 信号转导 细胞生物学 分泌物 化学 内分泌学 生物 生物化学 体外 肿瘤细胞
作者
Jikang Yang,Zhiyuan Xing
出处
期刊:Experimental Biology and Medicine [SAGE]
卷期号:246 (17): 1928-1937 被引量:14
标识
DOI:10.1177/15353702211010420
摘要

Cross-communication between cancer cells and macrophages within the tumor microenvironment fulfills the critical roles in the progression of cancers, including hepatocellular carcinoma (HCC). Ligustilide exerts anti-inflammation, anti-injury, and anti-tumor pleiotropic pharmacological functions. Nevertheless, its roles in HCC cells and tumor microenvironment remain elusive. In the current study, ligustilide dramatically restrained HCC cell viability and migration but had little cytotoxicity to normal hepatocytes. Importantly, ligustilide antagonized HCC cell co-culture-induced macrophage recruitment and M2 polarization by enhancing the percentage of CD14+CD206+ cells and macrophage M2 markers (CD163, Arg1, CD206, CCL22, IL-10, and TGF-β). Mechanistically, ligustilide repressed yes-associated protein (YAP) activation by reducing nuclear translocation, protein expression, transcriptional regulatory activity of YAP, and increasing p-YAP levels. Noticeably, blocking the YAP offset the suppressive effects of ligustilide on macrophage recruitment and M2 polarization evoked by HCC cells. Moreover, the release of interleukin-6 (IL-6) was mitigated by ligustilide in a YAP-dependent manner in HCC cells, concomitant with inhibition of IL-6R/STAT3 signaling activation. Of interest, interdicting the IL-6 aggravated ligustilide-mediated suppression in HCC-induced macrophage recruitment and M2 polarization; whereas exogenous IL-6 treatment reversed the above effects. Additionally, blockage of IL-6R signaling also overturned IL-6-induced macrophage recruitment and M2 phenotype. Consequently, these findings support a notion that ligustilide not only restrains HCC cell malignancy but also antagonizes HCC cell-evoked macrophage recruitment and M2 polarization by inhibiting YAP/IL-6 release-induced activation of the IL-6 receptor/signal transducer and activator of transcription 3 (IL-6R/STAT3) signaling. Thus, ligustilide may be a promising therapeutic agent to fight HCC by regulating cancer cells and cross-talk between tumor cells and macrophages in tumor microenvironment.
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