PMID- 28488118 OWN - NLM STAT- MEDLINE DCOM- 20171201 LR - 20180710 IS - 1559-0291 (Electronic) IS - 0273-2289 (Linking) VI - 183 IP - 4 DP - 2017 Dec TI - Isoliquiritigenin Induces Cytotoxicity in PC-12 Cells In Vitro. PG - 1173-1190 LID - 10.1007/s12010-017-2491-7 [doi] AB - Isoliquiritigenin (ISL) has been reported to have a wide range of biological activities. This study evaluated the cytotoxic effect of ISL on norvegicus pheochromocytoma cell line (PC-12 cells) and its possible molecular mechanism. The cytotoxicity in vitro of ISL against PC-12 cells was investigated by MTT assay. The migration and invasion of PC-12 cells were performed by scratch test and transwell assay. Apoptosis was evaluated by microscopy and flow cytometry. The reactive oxygen species (ROS) and mitochondrial membrane potential were studied by fluorescent microscopy. DNA damage of PC-12 cells was analyzed by comet assay. The protein expression of caspase, Bcl-2 family member, autophagy-associated protein Beclin-1, and LC3 was detected by western blot. The autophagy of PC-12 cells was investigated by acridine orange (AO) and monodansylcadaverine (MDC) staining. The IC(50) value of ISL against PC-12 cell is 17.8 +/- 1.8 muM. ISL could suppress PC-12 cell migration and invasion. AO/ethidium bromide staining and flow cytometry suggested that ISL caused apoptosis of PC-12 cells. Significant DNA damages of PC-12 cells treated with ISL were observed in a comet assay. ISL inhibited the cell growth of PC-12 cells at S phase. Exposure of PC-12 cells to ISL increased the levels of cellular reactive oxygen species (ROS) and decreased the mitochondrial membrane potential. Additionally, ISL trigged the release of cytochrome c from the mitochondria to the cytoplasm. The expression levels of caspase-9, caspase-3, caspase-7, Bax, and Bim were upregulated, whereas the expression levels of Bcl-2 and Bcl-x were downregulated. AO and monodansylcadaverine (MDC) staining assay showed that ISL caused autophagy of PC-12 cells. The upregulation of protein Beclin-1 and LC3 was observed in PC-12 cells. Therefore, the results show that ISL induces apoptosis of PC-12 cells through ROS-mediated activation of the intrinsic mitochondria-cytochrome c-caspase protease mechanism and causes the autophagy of PC-12 cells. Graphical Abstract The in vitro cytotoxicity, apoptosis, comet assay, ROS, mitochondrial membrane potential, cell cycle arrest, autophagy, and western blot induced by ISL were investigated. FAU - Yang, Hui-Hui AU - Yang HH AD - School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, People's Republic of China. FAU - Zhang, Cheng AU - Zhang C AD - School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, People's Republic of China. FAU - Lai, Shang-Hai AU - Lai SH AD - School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, People's Republic of China. FAU - Zeng, Chuan-Chuan AU - Zeng CC AD - School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, People's Republic of China. FAU - Liu, Yun-Jun AU - Liu YJ AD - School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, People's Republic of China. lyjche@163.com. AD - Guangdong Cosmetics Engineering and Technology Research Center, Guangzhou, 510006, People's Republic of China. lyjche@163.com. FAU - Wang, Xiu-Zhen AU - Wang XZ AD - School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, People's Republic of China. wxzqq1234@163.com. LA - eng GR - 2013LYM0047/Priority Academic Program Development of Guangdong Higher Education Institutions/ GR - 2016A030313728/Natural Science Foundation of Guangdong Province/ PT - Journal Article DEP - 20170509 PL - United States TA - Appl Biochem Biotechnol JT - Applied biochemistry and biotechnology JID - 8208561 RN - 0 (Beclin-1) RN - 0 (Becn1 protein, rat) RN - 0 (Chalcones) RN - 0 (Cytotoxins) RN - 0 (LC3 protein, rat) RN - 0 (Microtubule-Associated Proteins) RN - 0 (Reactive Oxygen Species) RN - B9CTI9GB8F (isoliquiritigenin) SB - IM MH - Animals MH - Apoptosis/*drug effects MH - Beclin-1/metabolism MH - Chalcones/*pharmacology MH - Cytotoxins/*pharmacology MH - Membrane Potential, Mitochondrial/*drug effects MH - Microtubule-Associated Proteins/metabolism MH - PC12 Cells MH - Rats MH - Reactive Oxygen Species/*metabolism OTO - NOTNLM OT - Apoptosis OT - Autophagy OT - Cell invasion OT - Isoliquiritigenin OT - Mitochondria EDAT- 2017/05/11 06:00 MHDA- 2017/12/02 06:00 CRDT- 2017/05/11 06:00 PHST- 2017/03/05 00:00 [received] PHST- 2017/04/24 00:00 [accepted] PHST- 2017/05/11 06:00 [pubmed] PHST- 2017/12/02 06:00 [medline] PHST- 2017/05/11 06:00 [entrez] AID - 10.1007/s12010-017-2491-7 [pii] AID - 10.1007/s12010-017-2491-7 [doi] PST - ppublish SO - Appl Biochem Biotechnol. 2017 Dec;183(4):1173-1190. doi: 10.1007/s12010-017-2491-7. Epub 2017 May 9.