PMID- 24627159 OWN - NLM STAT- MEDLINE DCOM- 20150112 LR - 20140404 IS - 1791-2431 (Electronic) IS - 1021-335X (Linking) VI - 31 IP - 5 DP - 2014 May TI - Arsenic hexoxide enhances TNF-alpha-induced anticancer effects by inhibiting NF-kappaB activity at a safe dose in MCF-7 human breast cancer cells. PG - 2305-11 LID - 10.3892/or.2014.3085 [doi] AB - Arsenic hexoxide (As4O6) has been used in Korean folk remedy for the treatment of cancer since the late 1980s. Evidence suggests that the anticancer effects of As4O6 are different from those of As2O3. Tumor necrosis factor-alpha (TNF-alpha) is generally increased in advanced cancer and is closely related to cancer progression, although it has cancer-killing effects. The reason is that TNF-alpha activates nuclear factor-kappaB (NF-kappaB) that is involved in cell proliferation, invasion, drug resistance and metastasis. In the present study, we investigated the effects of As4O6 on NF-kappaB activity, NF-kappaB-mediated cellular responses, and NF-kappaB-regulated gene expressions involved in metastasis at the concentrations of As4O6 where no cytotoxicity was observed. As4O6 suppressed NF-kappaB activation in both TNF-alpha-treated and control cells, and also suppressed IkappaB phosphorylation in a time-dependent manner, suggesting the suppression of NF-kappaB results, in part, from the inhibition of IkappaB degradation. We also confirmed the anti-NF-kappaB activity of As4O6 with synergism with TNF-alpha by augmenting caspase-8 activation. As4O6 also suppressed NF-kappaB activation induced by TNF-alpha, and some of the downstream NF-kappaB-regulated proteins involved in cancer proliferation, anti-apoptosis and metastasis. In conclusion, the present study demonstrated that As4O6 has anticancer properties by inhibiting NF-kappaB activation and NF-kappaB-regulated proteins at least in part through the inhibition of IkappaB phosphorylation, especially in the conditions of advanced cancer where TNF-alpha is highly secreted. FAU - Kim, Min Jeong AU - Kim MJ AD - Department of Internal Medicine, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-702, Republic of Korea. FAU - Jung, Ji Hyun AU - Jung JH AD - Department of Internal Medicine, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-702, Republic of Korea. FAU - Lee, Won Sup AU - Lee WS AD - Department of Internal Medicine, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-702, Republic of Korea. FAU - Yun, Jeong Won AU - Yun JW AD - Department of Internal Medicine, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-702, Republic of Korea. FAU - Lu, Jing Nan AU - Lu JN AD - Department of Internal Medicine, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-702, Republic of Korea. FAU - Yi, Sang Mi AU - Yi SM AD - Department of Internal Medicine, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-702, Republic of Korea. FAU - Kim, Hye Jung AU - Kim HJ AD - Department of Pharmacology, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-702, Republic of Korea. FAU - Chang, Seong-Hwan AU - Chang SH AD - Department of Surgery, Konkuk University School of Medicine, Seoul 143-701, Republic of Korea. FAU - Kim, Gon-Sup AU - Kim GS AD - School of Veterinary Medicine and Research Institute of Life Science, Gyeongsang National University, Jinju 660-701, Republic of Korea. FAU - Hong, Soon Chan AU - Hong SC AD - Department of Surgery, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-702, Republic of Korea. FAU - Ha, Woo Song AU - Ha WS AD - Department of Surgery, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-702, Republic of Korea. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140312 PL - Greece TA - Oncol Rep JT - Oncology reports JID - 9422756 RN - 0 (Arsenicals) RN - 0 (Oxides) RN - 0 (Transcription Factor RelA) RN - 0 (Tumor Necrosis Factor-alpha) RN - EC 2.7.11.10 (I-kappa B Kinase) RN - EC 3.4.22.- (Caspase 8) RN - N712M78A8G (Arsenic) SB - IM MH - Apoptosis/drug effects MH - Arsenic/pharmacology MH - Arsenicals/*pharmacology MH - Breast Neoplasms/*drug therapy MH - Caspase 8/biosynthesis MH - Cell Line, Tumor MH - Cell Proliferation MH - Drug Resistance, Neoplasm MH - Enzyme Activation/drug effects MH - Female MH - Gene Expression Regulation, Neoplastic MH - Humans MH - I-kappa B Kinase/metabolism MH - MCF-7 Cells MH - Neoplasm Invasiveness MH - Neoplasm Metastasis MH - Oxides/*pharmacology MH - Phosphorylation/drug effects MH - Transcription Factor RelA/*antagonists & inhibitors MH - Tumor Necrosis Factor-alpha/*metabolism EDAT- 2014/03/15 06:00 MHDA- 2015/01/13 06:00 CRDT- 2014/03/15 06:00 PHST- 2014/01/22 00:00 [received] PHST- 2014/02/28 00:00 [accepted] PHST- 2014/03/15 06:00 [entrez] PHST- 2014/03/15 06:00 [pubmed] PHST- 2015/01/13 06:00 [medline] AID - 10.3892/or.2014.3085 [doi] PST - ppublish SO - Oncol Rep. 2014 May;31(5):2305-11. doi: 10.3892/or.2014.3085. Epub 2014 Mar 12.