PMID- 34669157 OWN - NLM STAT- MEDLINE DCOM- 20220722 LR - 20220725 IS - 2095-0225 (Electronic) IS - 2095-0217 (Linking) VI - 16 IP - 3 DP - 2022 Jun TI - Rapamycin enhances the anti-tumor activity of cabozantinib in cMet inhibitor-resistant hepatocellular carcinoma. PG - 467-482 LID - 10.1007/s11684-021-0869-y [doi] AB - Cabozantinib, mainly targeting cMet and vascular endothelial growth factor receptor 2, is the second-line treatment for patients with advanced hepatocellular carcinoma (HCC). However, the lower response rate and resistance limit its enduring clinical benefit. In this study, we found that cMet-low HCC cells showed primary resistance to cMet inhibitors, and the combination of cabozantinib and mammalian target of rapamycin (mTOR) inhibitor, rapamycin, exhibited a synergistic inhibitory effect on the in vitro cell proliferation and in vivo tumor growth of these cells. Mechanically, the combination of rapamycin with cabozantinib resulted in the remarkable inhibition of AKT, extracellular signal-regulated protein kinases, mTOR, and common downstream signal molecules of receptor tyrosine kinases; decreased cyclin D1 expression; and induced cell cycle arrest. Meanwhile, rapamycin enhanced the inhibitory effects of cabozantinib on the migration and tubule formation of human umbilical vascular endothelial cells and human growth factor-induced invasion of cMet inhibitor-resistant HCC cells under hypoxia condition. These effects were further validated in xenograft models. In conclusion, our findings uncover a potential combination therapy of cabozantinib and rapamycin to combat cabozantinib-resistant HCC. CI - (c) 2021. Higher Education Press. FAU - Gao, Chao AU - Gao C AD - Department of General Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040, China. FAU - Wang, Shenghao AU - Wang S AD - Department of General Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040, China. FAU - Shao, Weiqing AU - Shao W AD - Department of General Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040, China. FAU - Zhang, Yu AU - Zhang Y AD - Department of General Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040, China. FAU - Lu, Lu AU - Lu L AD - Department of General Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040, China. FAU - Jia, Huliang AU - Jia H AD - Department of General Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040, China. FAU - Zhu, Kejin AU - Zhu K AD - Kanion Research Institute, Lianyungang, 222002, China. FAU - Chen, Jinhong AU - Chen J AD - Department of General Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040, China. FAU - Dong, Qiongzhu AU - Dong Q AD - Department of General Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040, China. AD - Institutes of Biomedical Sciences, Fudan University, Shanghai, 200040, China. FAU - Lu, Ming AU - Lu M AD - Department of General Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040, China. FAU - Zhu, Wenwei AU - Zhu W AD - Department of General Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040, China. westoolife@163.com. FAU - Qin, Lunxiu AU - Qin L AD - Department of General Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040, China. qinlx@fudan.edu.cn. AD - Institutes of Biomedical Sciences, Fudan University, Shanghai, 200040, China. qinlx@fudan.edu.cn. LA - eng PT - Journal Article DEP - 20211020 PL - China TA - Front Med JT - Frontiers of medicine JID - 101549428 RN - 0 (Anilides) RN - 0 (Pyridines) RN - 1C39JW444G (cabozantinib) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - *Anilides/pharmacology MH - Animals MH - *Carcinoma, Hepatocellular/drug therapy MH - Cell Line, Tumor MH - Cell Proliferation MH - Endothelial Cells/metabolism MH - Humans MH - *Liver Neoplasms/drug therapy MH - *Pyridines/pharmacology MH - *Sirolimus/pharmacology MH - Xenograft Model Antitumor Assays OTO - NOTNLM OT - cabozantinib OT - hepatocellular carcinoma OT - primary resistance OT - rapamycin EDAT- 2021/10/21 06:00 MHDA- 2022/07/23 06:00 CRDT- 2021/10/20 12:33 PHST- 2020/12/15 00:00 [received] PHST- 2021/05/28 00:00 [accepted] PHST- 2021/10/21 06:00 [pubmed] PHST- 2022/07/23 06:00 [medline] PHST- 2021/10/20 12:33 [entrez] AID - 10.1007/s11684-021-0869-y [pii] AID - 10.1007/s11684-021-0869-y [doi] PST - ppublish SO - Front Med. 2022 Jun;16(3):467-482. doi: 10.1007/s11684-021-0869-y. Epub 2021 Oct 20.