PMID- 31214512 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200929 IS - 2234-943X (Print) IS - 2234-943X (Electronic) IS - 2234-943X (Linking) VI - 9 DP - 2019 TI - The MAP3K7-mTOR Axis Promotes the Proliferation and Malignancy of Hepatocellular Carcinoma Cells. PG - 474 LID - 10.3389/fonc.2019.00474 [doi] LID - 474 AB - Targeted therapy is currently limited for patients with hepatocellular carcinoma (HCC) due to the lack of suitable targets. Kinases play pivotal roles in many cellular biological processes, whereas dysregulation of kinases may lead to various diseases, particularly cancer. However, the role of kinases in HCC malignancy remains unclear. In this study, we employed a kinome small interfering RNA (siRNA) library, comprising 710 kinase-related genes, to screen whether any kinases were essential for cell proliferation in various HCC cell lines. Through a kinome siRNA library screening, we found that MAP3K7 was a crucial gene for HCC cell proliferation. Pharmacological or genetic ablation of MAP3K7 diminished the growth, migration, and invasion of HCC cells, including primary HCC cells. Stable knockdown of MAP3K7 attenuated tumor formation in a spheroid cell culture model and tumor xenograft mouse model. In addition, silencing MAP3K7 reduced the phosphorylation and expression of mammalian target of rapamycin (mTOR) in HCC cells. MAP3K7 expression was positively correlated with mTOR expression in tumors of patients with HCC. Higher co-expression of MAP3K7 and mTOR was significantly associated with poor prognosis of HCC. Taken together, our results revealed that the MAP3K7-mTOR axis might promote tumorigenesis and malignancy, which provides a potential marker or therapeutic target for HCC patients. FAU - Cheng, Jin-Shiung AU - Cheng JS AD - Division of Gastroenterology and Hepatology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan. FAU - Tsai, Wei-Lun AU - Tsai WL AD - Division of Gastroenterology and Hepatology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan. AD - School of Medicine, National Yang-Ming University, Taipei, Taiwan. FAU - Liu, Pei-Feng AU - Liu PF AD - Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan. FAU - Goan, Yih-Gang AU - Goan YG AD - Division of Thoracic Surgery, Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan. FAU - Lin, Chih-Wen AU - Lin CW AD - Division of Gastroenterology and Hepatology, E-Da Dachang Hospital, I-Shou University, Kaohsiung, Taiwan. AD - School of Medicine for International Students, I-Shou University, Kaohsiung, Taiwan. FAU - Tseng, Ho-Hsing AU - Tseng HH AD - Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan. FAU - Lee, Cheng-Hsin AU - Lee CH AD - Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan. FAU - Shu, Chih-Wen AU - Shu CW AD - School of Medicine for International Students, I-Shou University, Kaohsiung, Taiwan. LA - eng PT - Journal Article DEP - 20190604 PL - Switzerland TA - Front Oncol JT - Frontiers in oncology JID - 101568867 PMC - PMC6558008 OTO - NOTNLM OT - MAP3K7 OT - invasion OT - kinome siRNA library screening OT - mTOR OT - migration OT - prognosis OT - proliferation EDAT- 2019/06/20 06:00 MHDA- 2019/06/20 06:01 PMCR- 2019/01/01 CRDT- 2019/06/20 06:00 PHST- 2019/02/05 00:00 [received] PHST- 2019/05/17 00:00 [accepted] PHST- 2019/06/20 06:00 [entrez] PHST- 2019/06/20 06:00 [pubmed] PHST- 2019/06/20 06:01 [medline] PHST- 2019/01/01 00:00 [pmc-release] AID - 10.3389/fonc.2019.00474 [doi] PST - epublish SO - Front Oncol. 2019 Jun 4;9:474. doi: 10.3389/fonc.2019.00474. eCollection 2019.