PMID- 26409214 OWN - NLM STAT- MEDLINE DCOM- 20161213 LR - 20220330 IS - 1600-0641 (Electronic) IS - 0168-8278 (Linking) VI - 64 IP - 2 DP - 2016 Feb TI - Cleaved c-FLIP mediates the antiviral effect of TNF-alpha against hepatitis B virus by dysregulating hepatocyte nuclear factors. PG - 268-277 LID - S0168-8278(15)00630-3 [pii] LID - 10.1016/j.jhep.2015.09.012 [doi] AB - BACKGROUND & AIMS: Cytokines are key molecules implicated in the defense against virus infection. Tumor necrosis factor-alpha (TNF-alpha) is well known to block the replication of hepatitis B virus (HBV). However, the molecular mechanism and the downstream effector molecules remain largely unknown. METHODS: In this study, we investigated the antiviral effect and mechanism of p22-FLIP (FLICE-inhibitory protein) by ectopic expression in vitro and in vivo. In addition, to provide the biological relevance of our study, we examined that the p22-FLIP is involved in TNF-alpha-mediated suppression of HBV in primary human hepatocytes. RESULTS: We found that p22-FLIP, a newly discovered c-FLIP cleavage product, inhibited HBV replication at the transcriptional level in both hepatoma cells and primary human hepatocytes, and that c-FLIP conversion to p22-FLIP was stimulated by the TNF-alpha/NF-kappaB pathway. p22-FLIP inhibited HBV replication through the upregulation of HNF3beta but downregulation of HNF4alpha, thus inhibiting both HBV enhancer elements. Finally, p22-FLIP potently inhibited HBV DNA replication in a mouse model of HBV replication. CONCLUSIONS: Taken together, these findings suggest that the anti-apoptotic p22-FLIP serves a novel function of inhibiting HBV transcription, and mediates the antiviral effect of TNF-alpha against HBV replication. CI - Copyright (c) 2015 European Association for the Study of the Liver. Published by Elsevier B.V. All rights reserved. FAU - Park, Yong Kwang AU - Park YK AD - Department of Pharmacology, Center for Cancer Research and Diagnostic Medicine, IBST, School of Medicine, Konkuk University, Seoul, Republic of Korea; KU Open Innovation Center, Konkuk University, Seoul, Republic of Korea. FAU - Park, Eun-Sook AU - Park ES AD - Department of Pharmacology, Center for Cancer Research and Diagnostic Medicine, IBST, School of Medicine, Konkuk University, Seoul, Republic of Korea; KU Open Innovation Center, Konkuk University, Seoul, Republic of Korea. FAU - Kim, Doo Hyun AU - Kim DH AD - Department of Pharmacology, Center for Cancer Research and Diagnostic Medicine, IBST, School of Medicine, Konkuk University, Seoul, Republic of Korea. FAU - Ahn, Sung Hyun AU - Ahn SH AD - Department of Pharmacology, Center for Cancer Research and Diagnostic Medicine, IBST, School of Medicine, Konkuk University, Seoul, Republic of Korea. FAU - Park, Seung Hwa AU - Park SH AD - Department of Anatomy, School of Medicine, Konkuk University, Seoul, Republic of Korea. FAU - Lee, Ah Ram AU - Lee AR AD - Department of Pharmacology, Center for Cancer Research and Diagnostic Medicine, IBST, School of Medicine, Konkuk University, Seoul, Republic of Korea. FAU - Park, Soree AU - Park S AD - Department of Pharmacology, Center for Cancer Research and Diagnostic Medicine, IBST, School of Medicine, Konkuk University, Seoul, Republic of Korea. FAU - Kang, Hong Seok AU - Kang HS AD - Department of Pharmacology, Center for Cancer Research and Diagnostic Medicine, IBST, School of Medicine, Konkuk University, Seoul, Republic of Korea. FAU - Lee, Ji-Hyun AU - Lee JH AD - Samsung Biomedical Research Institute, Seoul, Republic of Korea. FAU - Kim, Jong Man AU - Kim JM AD - Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea. FAU - Lee, Suk-Koo AU - Lee SK AD - Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea. FAU - Lim, Keo-Heun AU - Lim KH AD - Department of Pharmacology, Center for Cancer Research and Diagnostic Medicine, IBST, School of Medicine, Konkuk University, Seoul, Republic of Korea. FAU - Isorce, Nathalie AU - Isorce N AD - INSERM Unite 1052, Cancer Research Center of Lyon, Hospices Civils de Lyon, Lyon University, Lyon, France. FAU - Tong, Shuping AU - Tong S AD - Liver Research Center, Rhode Island Hospital, Brown University, Providence, RI, USA. FAU - Zoulim, Fabien AU - Zoulim F AD - INSERM Unite 1052, Cancer Research Center of Lyon, Hospices Civils de Lyon, Lyon University, Lyon, France. FAU - Kim, Kyun-Hwan AU - Kim KH AD - Department of Pharmacology, Center for Cancer Research and Diagnostic Medicine, IBST, School of Medicine, Konkuk University, Seoul, Republic of Korea; KU Open Innovation Center, Konkuk University, Seoul, Republic of Korea; Research Institute of Medical Sciences, Konkuk University, Seoul, Republic of Korea. Electronic address: khkim10@kku.ac.kr. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150925 PL - Netherlands TA - J Hepatol JT - Journal of hepatology JID - 8503886 RN - 0 (Antiviral Agents) RN - 0 (CASP8 and FADD-Like Apoptosis Regulating Protein) RN - 0 (DNA, Viral) RN - 0 (Hepatocyte Nuclear Factors) RN - 0 (Tumor Necrosis Factor-alpha) SB - IM MH - Animals MH - Antiviral Agents/pharmacology MH - CASP8 and FADD-Like Apoptosis Regulating Protein/*metabolism MH - Cell Line MH - DNA, Viral/metabolism MH - *Hepatitis B virus/drug effects/physiology MH - Hepatocyte Nuclear Factors/metabolism MH - Hepatocytes/metabolism MH - Humans MH - Mice MH - Models, Animal MH - Signal Transduction/drug effects MH - *Tumor Necrosis Factor-alpha/metabolism/pharmacology MH - Virus Replication/*drug effects OTO - NOTNLM OT - HBV replication OT - Hepatitis B virus OT - TNF-alpha OT - p22-FLIP EDAT- 2015/09/27 06:00 MHDA- 2016/12/15 06:00 CRDT- 2015/09/27 06:00 PHST- 2015/07/06 00:00 [received] PHST- 2015/08/31 00:00 [revised] PHST- 2015/09/14 00:00 [accepted] PHST- 2015/09/27 06:00 [entrez] PHST- 2015/09/27 06:00 [pubmed] PHST- 2016/12/15 06:00 [medline] AID - S0168-8278(15)00630-3 [pii] AID - 10.1016/j.jhep.2015.09.012 [doi] PST - ppublish SO - J Hepatol. 2016 Feb;64(2):268-277. doi: 10.1016/j.jhep.2015.09.012. Epub 2015 Sep 25.