PMID- 28638450 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201001 IS - 1837-9664 (Print) IS - 1837-9664 (Electronic) IS - 1837-9664 (Linking) VI - 8 IP - 8 DP - 2017 TI - Osteopontin is Critical for Hyperactive mTOR-Induced Tumorigenesis in Oral Squamous Cell Carcinoma. PG - 1362-1370 LID - 10.7150/jca.18031 [doi] AB - Mechanistic target of rapamycin (mTOR) plays a critical role in the development of oral squamous cell carcinoma (OSCC), but the underlying mechanisms remain poorly understood. Here we have demonstrated that the expression of osteopontin (OPN) was dramatically up-regulated in OSCC tissues and cell lines. Moreover, reduction of OPN suppressed cell proliferation, colony formation, and in vivo tumorigenic ability of OSCC cell lines Tca8113. In addition, there was a strong positive correlation between mTORC1 activity and OPN expression in OSCC tissues and cell lines. Furthermore, mTOR complex 1 (mTORC1) enhanced OPN expression through up-regulation of ERRalpha. Therefore, OPN is a downstream target of mTORC1 and is crucial for OSCC development. mTORC1, ERRalpha, and OPN may be potential targets for treatment of OSCC with aberrant mTORC1 signaling. FAU - Gan, Ning AU - Gan N AD - Stomatological Hospital of Chongqing Medical University, Chongqing 401147, China. AD - Chongqing key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, China. AD - Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing 401147, China. AD - Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine (Ministry of Education), Chongqing Medical University, Chongqing 400016, China. FAU - Zou, Sihai AU - Zou S AD - Stomatological Hospital of Chongqing Medical University, Chongqing 401147, China. AD - Chongqing key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, China. AD - Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing 401147, China. FAU - Hang, Wenming AU - Hang W AD - Stomatological Hospital of Chongqing Medical University, Chongqing 401147, China. AD - Chongqing key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, China. AD - Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing 401147, China. FAU - Yang, Deqin AU - Yang D AD - Stomatological Hospital of Chongqing Medical University, Chongqing 401147, China. AD - Chongqing key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, China. AD - Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing 401147, China. FAU - Zhang, Xuemei AU - Zhang X AD - Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine (Ministry of Education), Chongqing Medical University, Chongqing 400016, China. FAU - Yin, Yibing AU - Yin Y AD - Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine (Ministry of Education), Chongqing Medical University, Chongqing 400016, China. LA - eng PT - Journal Article DEP - 20170512 PL - Australia TA - J Cancer JT - Journal of Cancer JID - 101535920 PMC - PMC5479241 OTO - NOTNLM OT - ERRalpha OT - OPN OT - OSCC. OT - mTOR OT - tumorigenesis COIS- Competing Interests: The authors have declared that no competing interest exists. EDAT- 2017/06/24 06:00 MHDA- 2017/06/24 06:01 PMCR- 2017/01/01 CRDT- 2017/06/23 06:00 PHST- 2016/10/22 00:00 [received] PHST- 2017/02/14 00:00 [accepted] PHST- 2017/06/23 06:00 [entrez] PHST- 2017/06/24 06:00 [pubmed] PHST- 2017/06/24 06:01 [medline] PHST- 2017/01/01 00:00 [pmc-release] AID - jcav08p1362 [pii] AID - 10.7150/jca.18031 [doi] PST - epublish SO - J Cancer. 2017 May 12;8(8):1362-1370. doi: 10.7150/jca.18031. eCollection 2017.