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Cheng YL, Lin YS, Chen CL, Tsai TT, Tsai CC, Wu YW, Ou YD, Chu YY, Wang JM, Yu CY, Lin CF. Activation of Nrf2 by the dengue virus causes an increase in CLEC5A, which enhances TNF-α production by mononuclear phagocytes. Sci Rep 2016; 6:32000. [PMID: 27561946 PMCID: PMC4999957 DOI: 10.1038/srep32000] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 07/27/2016] [Indexed: 12/11/2022] Open
Abstract
Infection by the dengue virus (DENV) threatens global public health due to its high prevalence and the lack of effective treatments. Host factors may contribute to the pathogenesis of DENV; herein, we investigated the role of nuclear factor (erythroid-derived 2)-like 2 (Nrf2), which is activated by DENV in mononuclear phagocytes. DENV infection selectively activates Nrf2 following nuclear translocation. Following endoplasmic reticular (ER) stress, protein kinase R-like ER kinase (PERK) facilitated Nrf2-mediated transcriptional activation of C-type lectin domain family 5, member A (CLEC5A) to increase CLEC5A expression. Signaling downstream of the Nrf2-CLEC5A interaction enhances Toll-like receptor 3 (TLR3)-independent tumor necrosis factor (TNF)-α production following DENV infection. Forced expression of the NS2B3 viral protein induces Nrf2 nuclear translocation/activation and CLEC5A expression which increases DENV-induced TNF-α production. Animal studies confirmed Nrf2-induced CLEC5A and TNF-α in brains of DENV-infected mice. These results demonstrate that DENV infection causes Nrf2-regulated TNF-α production by increasing levels of CLEC5A.
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Affiliation(s)
- Yi-Lin Cheng
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan.,Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan 701, Taiwan
| | - Yee-Shin Lin
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan.,Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan 701, Taiwan.,Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
| | - Chia-Ling Chen
- Translational Research Center, Taipei Medical University, Taipei 110, Taiwan
| | - Tsung-Ting Tsai
- Department of Microbiology and Immunology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
| | - Cheng-Chieh Tsai
- Department of Nursing, Chung Hwa University of Medical Technology, Tainan 717, Taiwan
| | - Yan-Wei Wu
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan.,Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan 701, Taiwan
| | - Yi-Dan Ou
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
| | - Yu-Yi Chu
- Institute of Bioinformatics and Biosignal Transduction, National Cheng Kung University, Tainan 701, Taiwan
| | - Ju-Ming Wang
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan.,Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan 701, Taiwan.,Institute of Bioinformatics and Biosignal Transduction, National Cheng Kung University, Tainan 701, Taiwan
| | - Chia-Yi Yu
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
| | - Chiou-Feng Lin
- Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan 701, Taiwan.,Department of Microbiology and Immunology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.,Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
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