PMID- 25310356 OWN - NLM STAT- MEDLINE DCOM- 20150619 LR - 20211203 IS - 1791-3004 (Electronic) IS - 1791-2997 (Linking) VI - 10 IP - 6 DP - 2014 Dec TI - Berberine sensitizes rapamycin‑mediated human hepatoma cell death in vitro. PG - 3132-8 LID - 10.3892/mmr.2014.2608 [doi] AB - Rapamycin is clinically used as an immunosuppressant. Increasing evidence suggests that rapamycin has an important inhibitory role in the development and progression of different types of cancer and that it is a promising candidate for cancer chemotherapy. Berberine is an isoquinoline alkaloid isolated from medicinal plant species, which has been used in traditional Chinese medicine with no significant side effects. Recent research has demonstrated that berberine has anticancer activity against various types of cancer, mediated through the suppression of mammalian target of rapamycin (mTOR). The present study aimed to investigate the in vitro synergistic anticancer effect of combined treatment of rapamycin at various concentrations (0, 10, 50, 100 and 200 nM) and berberine (62.5 microM) in SMMC7721 and HepG2 hepatocellular carcinoma (HCC) cell lines, and the potential underlying molecular mechanism. The combined use of rapamycin and berberine was found to have a synergistic cytotoxic effect, with berberine observed to maintain the cyotoxic effect of rapamycin on HCC cells at a lower rapamycin concentration. Moreover, the cells treated with the combination of the two agents exhibited significantly decreased protein levels of phosphorylated (p)‑p70S6 kinase 1 (Thr389), the downstream effector of mTOR, compared with the cells treated with rapamycin or berberine alone. Furthermore, overexpression of cluster of differentiation (CD) 147, a transmembrance glycoprotein associated with the anticancer effects of berberine, was found to upregulate p‑mTOR expression and inhibit cell death in SMMC7721 cells co‑treated with rapamycin and berberine. In conclusion, the findings of the present study suggest that the combined use of rapamycin and berberine may improve HCC therapy through synergistically inhibiting the mTOR signaling pathway, which is at least in part, mediated through CD147. FAU - Guo, Na AU - Guo N AD - Laboratory of Cell Biology and Translational Medicine, Institute of Basic Medical Science, X'ian Medical University, Xi'an, Shaanxi 710021, P.R. China. FAU - Yan, Aili AU - Yan A AD - Laboratory of Cell Biology and Translational Medicine, Institute of Basic Medical Science, X'ian Medical University, Xi'an, Shaanxi 710021, P.R. China. FAU - Gao, Xingchun AU - Gao X AD - Laboratory of Cell Biology and Translational Medicine, Institute of Basic Medical Science, X'ian Medical University, Xi'an, Shaanxi 710021, P.R. China. FAU - Chen, Yanke AU - Chen Y AD - Department of Cell Biology and Genetics, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710032, P.R. China. FAU - He, Xinying AU - He X AD - Laboratory of Cell Biology and Translational Medicine, Institute of Basic Medical Science, X'ian Medical University, Xi'an, Shaanxi 710021, P.R. China. FAU - Hu, Zhifang AU - Hu Z AD - Laboratory of Cell Biology and Translational Medicine, Institute of Basic Medical Science, X'ian Medical University, Xi'an, Shaanxi 710021, P.R. China. FAU - Mi, Man AU - Mi M AD - Laboratory of Cell Biology and Translational Medicine, Institute of Basic Medical Science, X'ian Medical University, Xi'an, Shaanxi 710021, P.R. China. FAU - Tang, Xu AU - Tang X AD - Department of Pathology, Sichuan College of Traditional Chinese Medicine, Mianyang, Sichuan 721000, P.R. China. FAU - Gou, Xingchun AU - Gou X AD - Laboratory of Cell Biology and Translational Medicine, Institute of Basic Medical Science, X'ian Medical University, Xi'an, Shaanxi 710021, P.R. China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20141008 PL - Greece TA - Mol Med Rep JT - Molecular medicine reports JID - 101475259 RN - 0I8Y3P32UF (Berberine) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Berberine/*pharmacology MH - Carcinoma, Hepatocellular/*drug therapy/metabolism MH - Cell Death/*drug effects MH - Cell Line, Tumor MH - Drug Synergism MH - Hep G2 Cells MH - Humans MH - Liver Neoplasms/*drug therapy/metabolism MH - Signal Transduction/drug effects MH - Sirolimus/*pharmacology MH - TOR Serine-Threonine Kinases/metabolism EDAT- 2014/10/14 06:00 MHDA- 2015/06/20 06:00 CRDT- 2014/10/14 06:00 PHST- 2013/09/18 00:00 [received] PHST- 2014/04/24 00:00 [accepted] PHST- 2014/10/14 06:00 [entrez] PHST- 2014/10/14 06:00 [pubmed] PHST- 2015/06/20 06:00 [medline] AID - 10.3892/mmr.2014.2608 [doi] PST - ppublish SO - Mol Med Rep. 2014 Dec;10(6):3132-8. doi: 10.3892/mmr.2014.2608. Epub 2014 Oct 8.