PMID- 30780125 OWN - NLM STAT- MEDLINE DCOM- 20190822 LR - 20190822 IS - 1096-0341 (Electronic) IS - 0042-6822 (Linking) VI - 530 DP - 2019 Apr TI - Influenza A virus (H1N1) triggers a hypoxic response by stabilizing hypoxia-inducible factor-1alpha via inhibition of proteasome. PG - 51-58 LID - S0042-6822(19)30050-9 [pii] LID - 10.1016/j.virol.2019.02.010 [doi] AB - Virus reprogramming of host cellular function is a critical strategy for viral survival and replication. A better understanding of virus-host interaction may provide new potential avenues for the treatment of viral diseases. It has been reported that hypoxia-inducible factor-1 (HIF-1) pathway is activated by a range of pathogens via different mechanisms, but the impact of Influenza A virus on HIF-1 signaling is still unclear. In this study, we observed H1N1 infection stabilized HIF-1alpha under normoxic conditions. In detail, H1N1 did not increase HIF-1alpha mRNA transcription, nor impaired posttranslational prolyl hydroxylation or ubiquitination of HIF-1alpha, but inhibited the function of proteasome, resulting in HIF-1alpha accumulation. Furthermore, a decreased expression of factor inhibiting HIF-1 (FIH-1), which hydroxylates asparagine 803 within HIF-1alpha to repress HIF-1alpha activity, was seen after H1N1 infection. Taken together, these findings reveal a previously unrecognized mechanism of viral activation of the HIF-1 pathway, resembling a hypoxic response in normoxia. CI - Copyright (c) 2019 The Authors. Published by Elsevier Inc. All rights reserved. FAU - Ren, Lehao AU - Ren L AD - Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 201620, China. FAU - Zhang, Wanju AU - Zhang W AD - Department of Pathogen Diagnosis and Biosafety, Shanghai Public Health Clinical Center, Key Laboratory of Medical Molecular Virology, Ministry of Education and Health, Shanghai Medical College, Fudan University, Shanghai 201508, China. FAU - Han, Peng AU - Han P AD - Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 201620, China. FAU - Zhang, Jiaxiang AU - Zhang J AD - Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 201620, China. FAU - Zhu, Yong AU - Zhu Y AD - Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 201620, China. FAU - Meng, Xiaoxiao AU - Meng X AD - Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 201620, China. FAU - Zhang, Jing AU - Zhang J AD - Department of respiratory and critical care medicine, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China. FAU - Hu, Yunwen AU - Hu Y AD - Department of Pathogen Diagnosis and Biosafety, Shanghai Public Health Clinical Center, Key Laboratory of Medical Molecular Virology, Ministry of Education and Health, Shanghai Medical College, Fudan University, Shanghai 201508, China. FAU - Yi, Zhigang AU - Yi Z AD - Department of Pathogen Diagnosis and Biosafety, Shanghai Public Health Clinical Center, Key Laboratory of Medical Molecular Virology, Ministry of Education and Health, Shanghai Medical College, Fudan University, Shanghai 201508, China. FAU - Wang, Ruilan AU - Wang R AD - Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 201620, China. Electronic address: wangyusun@hotmail.com. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190211 PL - United States TA - Virology JT - Virology JID - 0110674 RN - 0 (HIF1A protein, human) RN - 0 (Hypoxia-Inducible Factor 1, alpha Subunit) RN - EC 3.4.25.1 (Proteasome Endopeptidase Complex) MH - A549 Cells MH - *Host-Pathogen Interactions MH - Humans MH - Hypoxia-Inducible Factor 1, alpha Subunit/*metabolism MH - Influenza A Virus, H1N1 Subtype/*growth & development MH - Proteasome Endopeptidase Complex/*metabolism MH - Protein Stability MH - Proteolysis OTO - NOTNLM OT - Factor inhibiting HIF-1 OT - H1N1 OT - Hypoxia-inducible factor-1 OT - Proteasome EDAT- 2019/02/20 06:00 MHDA- 2019/08/23 06:00 CRDT- 2019/02/20 06:00 PHST- 2018/11/23 00:00 [received] PHST- 2019/02/08 00:00 [revised] PHST- 2019/02/10 00:00 [accepted] PHST- 2019/02/20 06:00 [pubmed] PHST- 2019/08/23 06:00 [medline] PHST- 2019/02/20 06:00 [entrez] AID - S0042-6822(19)30050-9 [pii] AID - 10.1016/j.virol.2019.02.010 [doi] PST - ppublish SO - Virology. 2019 Apr;530:51-58. doi: 10.1016/j.virol.2019.02.010. Epub 2019 Feb 11.