PMID- 32455774 OWN - NLM STAT- MEDLINE DCOM- 20210225 LR - 20210225 IS - 2073-4409 (Electronic) IS - 2073-4409 (Linking) VI - 9 IP - 5 DP - 2020 May 21 TI - HDAC3-ERalpha Selectively Regulates TNF-alpha-Induced Apoptotic Cell Death in MCF-7 Human Breast Cancer Cells via the p53 Signaling Pathway. LID - 10.3390/cells9051280 [doi] LID - 1280 AB - Tumor necrosis factor-alpha (TNF-alpha) plays a significant role in inflammation and cancer-related apoptosis. We identified a TNF-alpha-mediated epigenetic mechanism of apoptotic cell death regulation in estrogen receptor-alpha (ERalpha)-positive human breast cancer cells. To assess the apoptotic effect of TNF-alpha, annexin V/ propidium iodide (PI) double staining, cell viability assays, and Western blotting were performed. To elucidate this mechanism, histone deacetylase (HDAC) activity assay and immunoprecipitation (IP) were conducted; the mechanism was subsequently confirmed through chromatin IP (ChIP) assays. Finally, we assessed HDAC3-ERalpha-mediated apoptotic cell death after TNF-alpha treatment in ERalpha-positive human breast cancer (MCF-7) cells via the transcriptional activation of p53 target genes using luciferase assay and quantitative reverse transcription PCR. The TNF-alpha-induced selective apoptosis in MCF-7 cells was negatively regulated by the HDAC3-ERalpha complex in a caspase-7-dependent manner. HDAC3 possessed a p53-binding element, thus suppressing the transcriptional activity of its target genes. In contrast, MCF-7 cell treatment with TNF-alpha led to dissociation of the HDAC3-ERalpha complex and substitution of the occupancy on the promoter by the p53-p300 complex, thus accelerating p53 target gene expression. In this process, p53 stabilization was accompanied by its acetylation. This study showed that p53-mediated apoptosis in ERalpha-positive human breast cancer cells was negatively regulated by HDAC3-ERalpha in a caspase-7-dependent manner. Therefore, these proteins have potential application in therapeutic strategies. FAU - Park, Seung-Ho AU - Park SH AD - Department of Biomedical Sciences, Asan Medical Center, AMIST, University of Ulsan College of Medicine, Seoul 05505, Korea. AD - Department of Pharmacology, University of Ulsan College of Medicine, Seoul 05505, Korea. FAU - Kim, Hyunhee AU - Kim H AD - Department of Biomedical Sciences, Asan Medical Center, AMIST, University of Ulsan College of Medicine, Seoul 05505, Korea. AD - Department of Pharmacology, University of Ulsan College of Medicine, Seoul 05505, Korea. FAU - Kwak, Sungmin AU - Kwak S AD - Department of Biomedical Sciences, Asan Medical Center, AMIST, University of Ulsan College of Medicine, Seoul 05505, Korea. AD - Department of Pharmacology, University of Ulsan College of Medicine, Seoul 05505, Korea. FAU - Jeong, Ji-Hoon AU - Jeong JH AD - Department of Biomedical Sciences, Asan Medical Center, AMIST, University of Ulsan College of Medicine, Seoul 05505, Korea. AD - Department of Pharmacology, University of Ulsan College of Medicine, Seoul 05505, Korea. FAU - Lee, Jangho AU - Lee J AD - Korea Food Research Institute, Wanju-gun 55365, Korea. FAU - Hwang, Jin-Taek AU - Hwang JT AD - Korea Food Research Institute, Wanju-gun 55365, Korea. AD - Department of Food Biotechnology, Korea University of Science & Technology, Daejeon 34113, Korea. FAU - Choi, Hyo-Kyoung AU - Choi HK AD - Korea Food Research Institute, Wanju-gun 55365, Korea. FAU - Choi, Kyung-Chul AU - Choi KC AD - Department of Biomedical Sciences, Asan Medical Center, AMIST, University of Ulsan College of Medicine, Seoul 05505, Korea. AD - Department of Pharmacology, University of Ulsan College of Medicine, Seoul 05505, Korea. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20200521 PL - Switzerland TA - Cells JT - Cells JID - 101600052 RN - 0 (Estrogen Receptor alpha) RN - 0 (Tumor Necrosis Factor-alpha) RN - 0 (Tumor Suppressor Protein p53) RN - EC 2.3.1.48 (E1A-Associated p300 Protein) RN - EC 2.3.1.48 (EP300 protein, human) RN - EC 3.4.22.- (Caspase 7) RN - EC 3.5.1.98 (Histone Deacetylases) RN - EC 3.5.1.98 (histone deacetylase 3) SB - IM MH - Acetylation MH - Apoptosis/*drug effects MH - Breast Neoplasms/*metabolism/*pathology MH - Caspase 7/metabolism MH - E1A-Associated p300 Protein/metabolism MH - Estrogen Receptor alpha/*metabolism MH - Female MH - Histone Deacetylases/*metabolism MH - Humans MH - MCF-7 Cells MH - Promoter Regions, Genetic MH - Protein Stability/drug effects MH - *Signal Transduction/drug effects MH - Tumor Necrosis Factor-alpha/*pharmacology MH - Tumor Suppressor Protein p53/*metabolism PMC - PMC7290399 OTO - NOTNLM OT - ERalpha OT - HDAC3 OT - TNF-alpha OT - apoptosis OT - p53 COIS- The authors declare no conflict of interest. EDAT- 2020/05/28 06:00 MHDA- 2021/02/26 06:00 PMCR- 2020/05/01 CRDT- 2020/05/28 06:00 PHST- 2020/03/30 00:00 [received] PHST- 2020/05/15 00:00 [revised] PHST- 2020/05/19 00:00 [accepted] PHST- 2020/05/28 06:00 [entrez] PHST- 2020/05/28 06:00 [pubmed] PHST- 2021/02/26 06:00 [medline] PHST- 2020/05/01 00:00 [pmc-release] AID - cells9051280 [pii] AID - cells-09-01280 [pii] AID - 10.3390/cells9051280 [doi] PST - epublish SO - Cells. 2020 May 21;9(5):1280. doi: 10.3390/cells9051280.