PMID- 29950857 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220318 IS - 1178-6930 (Print) IS - 1178-6930 (Electronic) IS - 1178-6930 (Linking) VI - 11 DP - 2018 TI - Curcumin suppresses the progression of laryngeal squamous cell carcinoma through the upregulation of miR-145 and inhibition of the PI3K/Akt/mTOR pathway. PG - 3521-3531 LID - 10.2147/OTT.S159236 [doi] AB - BACKGROUND: Curcumin is a polyphenol extracted from the rhizomes of Curcuma longa with extensive biological and pharmacological effects. The present study aimed to investigate the mechanisms of curcumin in laryngeal squamous cell carcinoma (LSCC). METHODS: Quantitative real-time reverse transcriptase-polymerase chain reaction was performed to detect the expressions of miR-145 in LSCC tissues and cells. The effects of miR-145 and curcumin on cell proliferation, apoptosis, cell cycle, migration and invasion were explored by MTT assay, flow cytometry analysis, Transwell migration and invasion assay, respectively. The effects of miR-145 combined with curcumin on the phosphoinositol 1,3 kinase (PI3K)/protein kinase B (Akt)/mammalian target of rapamycin (mTOR) pathway were detected by Western blot analysis. RESULTS: miR-145 was significantly downregulated in LSCC tissues and cells. Curcumin administration upregulated miR-145 expression in LSCC cells in a dose-dependent manner. miR-145 overexpression and curcumin treatment both markedly suppressed cell proliferation, migration and invasion and induced cell cycle arrest and apoptosis in LSCC cells. Moreover, curcumin treatment reversed the enhanced effects on cell viability, migration and invasion and the inhibitory effects on apoptosis conferred by anti-miR-145 in LSCC cells. Curcumin treatment dramatically aggravated miR-145-induced inhibition of the PI3K/Akt/mTOR pathway and reversed anti-miR-145-mediated activation of the PI3K/Akt/mTOR pathway in LSCC cells. CONCLUSION: Curcumin suppressed LSCC progression through the upregulation of miR-145 and inhibition of the PI3K/Akt/mTOR pathway. FAU - Zhu, Xiaofeng AU - Zhu X AD - Department of Otorhinolaryngology, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450000, People's Republic of China. FAU - Zhu, Ronghua AU - Zhu R AD - Department of Otorhinolaryngology, Jinan Central Hospital Affiliated to Shandong University, Jinan 250013, People's Republic of China. LA - eng PT - Journal Article DEP - 20180619 PL - New Zealand TA - Onco Targets Ther JT - OncoTargets and therapy JID - 101514322 PMC - PMC6016259 OTO - NOTNLM OT - LSCC OT - curcumin OT - miR-145 OT - the PI3K/Akt/mTOR pathway COIS- Disclosure The authors report no conflicts of interest in this work. EDAT- 2018/06/29 06:00 MHDA- 2018/06/29 06:01 PMCR- 2018/06/19 CRDT- 2018/06/29 06:00 PHST- 2018/06/29 06:00 [entrez] PHST- 2018/06/29 06:00 [pubmed] PHST- 2018/06/29 06:01 [medline] PHST- 2018/06/19 00:00 [pmc-release] AID - ott-11-3521 [pii] AID - 10.2147/OTT.S159236 [doi] PST - epublish SO - Onco Targets Ther. 2018 Jun 19;11:3521-3531. doi: 10.2147/OTT.S159236. eCollection 2018.