PMID- 28101201 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220311 IS - 1792-1074 (Print) IS - 1792-1082 (Electronic) IS - 1792-1074 (Linking) VI - 12 IP - 6 DP - 2016 Dec TI - Diosmetin inhibits cell proliferation and induces apoptosis by regulating autophagy via the mammalian target of rapamycin pathway in hepatocellular carcinoma HepG2 cells. PG - 4385-4392 LID - 10.3892/ol.2016.5301 [doi] AB - Hepatocellular carcinoma (HCC), which is a type of malignant tumor, is the fifth most common cancer in men and ninth in women worldwide. The aim of the present study was to investigate the antitumor effect of diosmetin (DIOS) in hepatocellular carcinoma HepG2 cells. The proliferation, apoptosis and autophagy rates of HepG2 cells were measured following treatment with DIOS. The effects of DIOS treatment on HepG2 cell proliferation and apoptosis rates were analyzed using MTT assays and Annexin V staining, respectively. The effect of DIOS treatment on autophagy levels was assessed using transmission electron microscopy, green fluorescent protein (GFP)-microtubule-associated protein 1 light chain (LC3) transfection and LysoTracker Red staining. Furthermore, bafilomycin A1 (BA1), an autophagy inhibitor, was used to assess the association between DIOS and cell autophagy, proliferation and apoptosis. In addition, the expression of autophagy-related proteins [mammalian target of rapamycin (mTOR), phosphatidylinositol 3-kinase, P70S6K, phosphoinositide-dependent kinase-1, extracellular signal-regulated kinase, 5'-AMP-activated protein kinase and Akt] and apoptosis-related proteins [B-cell lymphoma (Bcl)-2-associated X protein, Bak, p53, Bcl-2 and caspase-3] were analyzed by western blotting. The results revealed that DIOS significantly inhibited proliferation (P<0.01) and induced apoptosis (P<0.001) in HepG2 cells. It was also demonstrated that DIOS triggered autophagy by regulating the mTOR pathway in HepG2 cells. Notably, following treatment of HepG2 cells with the autophagy inhibitor, BA1, the expression of apoptosis-related proteins, including Bax, Bak and p53, were significantly decreased (P<0.05), and cell viability was recovered to a certain extent. In conclusion, DIOS inhibits cell proliferation and induces apoptosis in HepG2 cells via regulation of the mTOR pathway. Thus, the results of the current study indicate that DIOS may present a potential therapeutic agent for HCC treatment. FAU - Liu, Jie AU - Liu J AD - Laboratory of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang Key Laboratory of Hepatobiliary Diseases, Zhanjiang, Guangdong 524001, P.R. China. FAU - Ren, Hao AU - Ren H AD - Laboratory of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang Key Laboratory of Hepatobiliary Diseases, Zhanjiang, Guangdong 524001, P.R. China. FAU - Liu, Bin AU - Liu B AD - Laboratory of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang Key Laboratory of Hepatobiliary Diseases, Zhanjiang, Guangdong 524001, P.R. China. FAU - Zhang, Qingyu AU - Zhang Q AD - Laboratory of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang Key Laboratory of Hepatobiliary Diseases, Zhanjiang, Guangdong 524001, P.R. China. FAU - Li, Mingyi AU - Li M AD - Laboratory of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang Key Laboratory of Hepatobiliary Diseases, Zhanjiang, Guangdong 524001, P.R. China. FAU - Zhu, Runzhi AU - Zhu R AD - Laboratory of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang Key Laboratory of Hepatobiliary Diseases, Zhanjiang, Guangdong 524001, P.R. China. LA - eng PT - Journal Article DEP - 20161019 PL - Greece TA - Oncol Lett JT - Oncology letters JID - 101531236 PMC - PMC5228182 OTO - NOTNLM OT - apoptosis OT - autophagy OT - diosmetin OT - hepatocellular carcinoma OT - mammalian target of rapamycin EDAT- 2017/01/20 06:00 MHDA- 2017/01/20 06:01 PMCR- 2016/10/19 CRDT- 2017/01/20 06:00 PHST- 2015/08/24 00:00 [received] PHST- 2016/08/26 00:00 [accepted] PHST- 2017/01/20 06:00 [entrez] PHST- 2017/01/20 06:00 [pubmed] PHST- 2017/01/20 06:01 [medline] PHST- 2016/10/19 00:00 [pmc-release] AID - OL-0-0-5301 [pii] AID - 10.3892/ol.2016.5301 [doi] PST - ppublish SO - Oncol Lett. 2016 Dec;12(6):4385-4392. doi: 10.3892/ol.2016.5301. Epub 2016 Oct 19.