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Astragalus mongholicus Bunge-Curcuma aromatica Salisb. suppresses growth and metastasis of colorectal cancer cells by inhibiting M2 macrophage polarization via a Sp1/ZFAS1/miR-153-3p/CCR5 regulatory axis

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Abstract

Colorectal cancer (CRC) is regarded as one of the commonest cancer types around the world. Due to the poor understanding on the causes of CRC formation and progression, this study sets out to investigate the physiological mechanisms by which Astragalus mongholicus Bunge-Curcuma aromatica Salisb. (ARCR) regulates CRC growth and metastasis, and the role in which M2 macrophage polarization plays in this process. An orthotopic-transplant model of CRC was established to evaluate the influence of ARCR on the polarization of M2 macrophage and the growth and metastasis of tumors. Next, the binding affinity among Sp1, ZFAS1, miR-153-5p, and CCR5 was identified using multiple assays. Finally, after co-culture of bone marrow–derived macrophages (BMDM) with CRC cell line CT26.WT, the cell proliferative, invasive, and migrated abilities were assessed in gain- or loss-of-function experiments. ARCR inhibited the infiltration of M2 macrophages into tumor microenvironment to suppress the CRC growth and metastasis in vivo. Additionally, ARCR inhibited the transcription of ZFAS1 by reducing Sp1 expression to repress M2 macrophage polarization. Moreover, ZFAS1 competitively binds to miR-153-3p to upregulate the CCR5 expression. Finally, ARCR suppressed the polarization of M2 macrophages to inhibit the tumor growth and tumor metastasis in CRC by mediating the Sp1/ZFAS1/miR-153-3p/CCR5 regulatory axis. Collectively, ARCR appears to suppress the CRC cell growth and metastasis by suppressing M2 macrophage polarization via Sp1/ZFAS1/miR-153-3p/CCR5 regulatory axis.

Graphical abstract

1. ARCR suppress the CRC cell growth and metastasis

2. ZFAS1 promotes CCR5 expression by competitively binding to miR-153-3p.

3. Sp1 promotes M2 macrophage polarization by activating ZFAS1 via miR-153-3p/CCR5.

4. The study unveiled a protective target against CRC.

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The datasets generated and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 81904059, 81904066), the Natural Science Research in Jiangsu Province (19KJB360015, BK20190803), and the Youth Project of Nanjing University of Chinese Medicine (NZY81904059, NZY81904066,) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (Integration of Chinese and Western Medicine).

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Junfei Gu and Ruolan Sun wrote the paper; Decai Tang and Fuyan Liu conceived the experiments; Xiangwei Chang and Qiaohan Wang analyzed the data; Decai Tang and Fuyan Liu collected and provided the sample for this study. All authors have read and approved the final submitted manuscript.

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Correspondence to Qiaohan Wang.

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Gu, J., Sun, R., Tang, D. et al. Astragalus mongholicus Bunge-Curcuma aromatica Salisb. suppresses growth and metastasis of colorectal cancer cells by inhibiting M2 macrophage polarization via a Sp1/ZFAS1/miR-153-3p/CCR5 regulatory axis. Cell Biol Toxicol 38, 679–697 (2022). https://doi.org/10.1007/s10565-021-09679-w

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  • DOI: https://doi.org/10.1007/s10565-021-09679-w

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