PMID- 24105047 OWN - NLM STAT- MEDLINE DCOM- 20150109 LR - 20211021 IS - 1699-3055 (Electronic) IS - 1699-048X (Linking) VI - 16 IP - 6 DP - 2014 Jun TI - Peroxiredoxin 3 is resistant to oxidation-induced apoptosis of Hep-3b cells. PG - 561-6 LID - 10.1007/s12094-013-1117-y [doi] AB - OBJECTIVE: Although peroxiredoxin 3 (PRX3) was reported to be overexpressed in liver cancer, the precise function of PRX3 in the development and/or progression of liver cancer remained to be obscure. The present study was conducted to investigate the response of PRX3 to oxidative stress in hepatocellular carcinoma (HCC) cells. METHODS: After successful knockdown of PRX3 expression by small interfering RNA, we treated HCC cell lines Hep-3b and Hep-G2 with gradient concentrations of H2O2 and detected cell proliferation, apoptosis, and the level of reactive oxygen species (ROS) in the cells. RESULTS: After low-dose (5-20 mumol/l) H2O2 treatment, the ROS level was significantly higher in PRX3-knockdown Hep-3b cells than in controls. In addition, PRX3 down-regulation resulted in decreased proliferation, increased apoptosis, and increased caspase 3 activity of Hep-3b cells. We did not notice significant difference between PrxIII knockdown and control Hep-G2 cells in ROS level, cell viability or apoptosis. CONCLUSION: Our results suggest that PRX3 is an indispensable ROS scavenger that protects tumor cells against oxidative damage and subsequent apoptosis, which provides a clue that PRX3 may be involved in the chemotherapeutic resistance of liver cancer. The underlying mechanism for PRX3 function needs further investigation. FAU - Wang, Y-G AU - Wang YG AD - Department of Gastroenterology, Shandong Qianfoshan Hospital, Shandong University, Jinan, 250014, China. FAU - Li, L AU - Li L FAU - Liu, C-H AU - Liu CH FAU - Hong, S AU - Hong S FAU - Zhang, M-J AU - Zhang MJ LA - eng PT - Journal Article DEP - 20131009 PL - Italy TA - Clin Transl Oncol JT - Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico JID - 101247119 RN - 0 (Oxidants) RN - 0 (RNA, Small Interfering) RN - 0 (Reactive Oxygen Species) RN - BBX060AN9V (Hydrogen Peroxide) RN - EC 1.11.1.15 (PRDX3 protein, human) RN - EC 1.11.1.15 (Peroxiredoxin III) RN - EC 3.4.22.- (Caspase 3) SB - IM MH - Apoptosis/*drug effects MH - Blotting, Western MH - Carcinoma, Hepatocellular/metabolism/*pathology MH - Caspase 3/metabolism MH - Cell Proliferation/*drug effects MH - Flow Cytometry MH - Humans MH - Hydrogen Peroxide/*pharmacology MH - Liver Neoplasms/metabolism/*pathology MH - Oxidants/pharmacology MH - Oxidation-Reduction MH - Peroxiredoxin III/antagonists & inhibitors/genetics/*metabolism MH - RNA, Small Interfering/genetics MH - Reactive Oxygen Species/*metabolism MH - Tumor Cells, Cultured EDAT- 2013/10/10 06:00 MHDA- 2015/01/13 06:00 CRDT- 2013/10/10 06:00 PHST- 2013/07/02 00:00 [received] PHST- 2013/09/22 00:00 [accepted] PHST- 2013/10/10 06:00 [entrez] PHST- 2013/10/10 06:00 [pubmed] PHST- 2015/01/13 06:00 [medline] AID - 10.1007/s12094-013-1117-y [doi] PST - ppublish SO - Clin Transl Oncol. 2014 Jun;16(6):561-6. doi: 10.1007/s12094-013-1117-y. Epub 2013 Oct 9.