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Targeting FAPα-expressing hepatic stellate cells overcomes resistance to anti-angiogenics in colorectal cancer liver metastasis models

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机构: [1]College of Pharmacy, Jinan University, Guangzhou, China [2]The First Affiliated Hospital of Jinan University, Guangzhou, China [3]Guangdong Province Key Laboratory of Pharmacodynamic Constituentsof TCM and New Drugs Research [4]School of Traditional Chinese Medicine, Jinan University, Guangzhou, China [5]Sun Yat-sen University Cancer Center, Guangzhou, China [6]Department of Cellularand Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai, China [7]School of Medicine, Jinan University, Guangzhou, China
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Vessel co-option has been demonstrated to mediate colorectal cancer liver metastasis (CRCLM) resistance to anti-angiogenic therapy. The current mechanisms underlying vessel co-option have mainly focused on the "hijacker" tumor cells, whereas the function of the "hijackee" sinusoidal blood vessels has not been explored. Here, we found that the occurrence of vessel co-option in bevacizumab-resistant CRCLM xenografts was associated with increased expression of fibroblast activation protein alpha (FAPα) in the co-opted hepatic stellate cells (HSCs), which was dramatically attenuated in HSC-specific conditional Fap-knockout mice bearing CRCLM allografts. Mechanistically, bevacizumab treatment induced hypoxia to upregulate the expression of fibroblast growth factor-binding protein 1 (FGFBP1) in tumor cells. Gain- or loss-of-function experiments revealed that the bevacizumab-resistant tumor cell-derived FGFBP1 induced FAPα expression by enhancing the paracrine FGF2-FGFR1-ERK1/2-EGR1 signaling pathway in HSCs. FAPα promoted CXCL5 secretion in HSCs, which activated CXCR2 to promote the epithelial-mesenchymal transition of tumor cells and the recruitment of myeloid-derived suppressor cells. These findings were further validated in CRCLM patient-derived tumor tissues. Targeting FAPα+ HSCs effectively disrupted the co-opted sinusoidal blood vessels and overcame bevacizumab resistance. Our study highlights the role of FAPα+ HSCs in vessel co-option and provides an effective strategy to overcome the vessel co-option-mediated bevacizumab resistance.

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出版当年[2021]版:
大类 | 1 区 医学
小类 | 1 区 医学:研究与实验
最新[2025]版:
大类 | 1 区 医学
小类 | 1 区 医学:研究与实验
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第一作者机构: [1]College of Pharmacy, Jinan University, Guangzhou, China
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通讯机构: [1]College of Pharmacy, Jinan University, Guangzhou, China [*1]College of Pharmacy, Jinan University, 601 West Huangpu Avenue, Guangzhou, 510632, P.R. China
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