1
|
Gong X, Liang Y, Wang J, Pang Y, Wang F, Chen X, Zhang Q, Song C, Wang Y, Zhang C, Fang X, Chen X. Highly pathogenic PRRSV upregulates IL-13 production through nonstructural protein 9-mediated inhibition of N6-methyladenosine demethylase FTO. J Biol Chem 2024; 300:107199. [PMID: 38508309 PMCID: PMC11017062 DOI: 10.1016/j.jbc.2024.107199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 03/04/2024] [Accepted: 03/09/2024] [Indexed: 03/22/2024] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV), a highly infectious virus, causes severe losses in the swine industry by regulating the inflammatory response, inducing tissue damage, suppressing the innate immune response, and promoting persistent infection in hosts. Interleukin-13 (IL-13) is a cytokine that plays a critical role in regulating immune responses and inflammation, particularly in immune-related disorders, certain types of cancer, and numerous bacterial and viral infections; however, the underlying mechanisms of IL-13 regulation during PRRSV infection are not well understood. In this study, we demonstrated that PRRSV infection elevates IL-13 levels in porcine alveolar macrophages. PRRSV enhances m6A-methylated RNA levels while reducing the expression of fat mass and obesity associated protein (FTO, an m6A demethylase), thereby augmenting IL-13 production. PRRSV nonstructural protein 9 (nsp9) was a key factor for this modulation. Furthermore, we found that the residues Asp567, Tyr586, Leu593, and Asp595 were essential for nsp9 to induce IL-13 production via attenuation of FTO expression. These insights delineate PRRSV nsp9's role in FTO-mediated IL-13 release, advancing our understanding of PRRSV's impact on host immune and inflammatory responses.
Collapse
Affiliation(s)
- Xingyu Gong
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, Xuzhou, China
| | - Yuan Liang
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, Xuzhou, China
| | - Jingjing Wang
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, Xuzhou, China
| | - Yipeng Pang
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, Xuzhou, China
| | - Fang Wang
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, Xuzhou, China
| | - Xiaohan Chen
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, Xuzhou, China
| | - Qiaoya Zhang
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
| | - Chengchuang Song
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, Xuzhou, China; Laboratory of Phylogenomics and Comparative Genomics, Jiangsu Normal University, Xuzhou, Jiangsu Province, China
| | - Yanhong Wang
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, Xuzhou, China; Laboratory of Phylogenomics and Comparative Genomics, Jiangsu Normal University, Xuzhou, Jiangsu Province, China
| | - Chunlei Zhang
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, Xuzhou, China; Laboratory of Phylogenomics and Comparative Genomics, Jiangsu Normal University, Xuzhou, Jiangsu Province, China
| | - Xingtang Fang
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, Xuzhou, China; Laboratory of Phylogenomics and Comparative Genomics, Jiangsu Normal University, Xuzhou, Jiangsu Province, China.
| | - Xi Chen
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, Xuzhou, China; Laboratory of Phylogenomics and Comparative Genomics, Jiangsu Normal University, Xuzhou, Jiangsu Province, China.
| |
Collapse
|
2
|
Yang Y, Gao Y, Zhang L, Liu X, Sun Y, Bai J, Jiang P. Vidofludimus inhibits porcine reproductive and respiratory syndrome virus infection by targeting dihydroorotate dehydrogenase. Vet Res 2023; 54:124. [PMID: 38124181 PMCID: PMC10731701 DOI: 10.1186/s13567-023-01251-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) infection has caused huge economic losses in global swine industry over the last 37 years. PRRSV commercial vaccines are not effective against all epidemic PRRSV strains. In this study we performed a high-throughput screening (HTS) of an FDA-approved drug library, which contained 2339 compounds, and found vidofludimus (Vi) could significantly inhibits PRRSV replication in Marc-145 cells and primary porcine alveolar macrophages (PAMs). Compounds target prediction, molecular docking analysis, and target protein interference assay showed that Vi interacts with dihydroorotate dehydrogenase (DHODH), a rate-limiting enzyme in the de novo pyrimidine synthesis pathway. Furthermore, PRRSV infection was restored in the presence of excess uridine and cytidine which promote pyrimidine salvage, or excess orotate which is the product of DHODH in the de novo pyrimidine biosynthesis pathway, thus confirming that the antiviral effect of Vi against PRRSV relies on the inhibition of DHODH. In addition, Vi also has antiviral activity against Seneca virus A (SVA), encephalomyocarditis virus (EMCV), porcine epidemic diarrhea virus (PEDV), and pseudorabies virus (PRV) in vitro. These findings should be helpful for developing a novel prophylactic and therapeutic strategy against PRRSV and other swine viral infections.
Collapse
Affiliation(s)
- Yuanqi Yang
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yanni Gao
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Lujie Zhang
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xing Liu
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yangyang Sun
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Juan Bai
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ping Jiang
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
- Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009, China.
| |
Collapse
|
3
|
Gong X, Ma T, Wang J, Cao X, Zhang Q, Wang Y, Song C, Lai M, Zhang C, Fang X, Chen X. Nucleocapsid protein residues 35, 36, and 113 are critical sites in up-regulating the Interleukin-8 production via C/EBPα pathway by highly pathogenic porcine reproductive and respiratory syndrome virus. Microb Pathog 2023; 184:106345. [PMID: 37714310 DOI: 10.1016/j.micpath.2023.106345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/08/2023] [Accepted: 09/10/2023] [Indexed: 09/17/2023]
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) is a highly infectious and pathogenic agent that causes considerable economic damage in the swine industry. It regulates the inflammatory response, triggers inflammation-induced tissue damage, suppresses the innate immune response, and leads to persistent infection. Interleukin-8 (IL-8), a pro-inflammatory chemokine, plays a crucial role in inflammatory response during numerous bacteria and virus infections. However, the underlying mechanisms of IL-8 regulation during PRRSV infection are not well understood. In this study, we demonstrate that PRRSV-infected PAMs and Marc-145 cells release higher levels of IL-8. We screened the nucleocapsid protein, non-structural protein (nsp) 9, and nsp11 of PRRSV to enhance IL-8 promoter activity via the C/EBPα pathway. Furthermore, we identified that the amino acids Q35A, S36A, R113A, and I115A of the nucleocapsid protein play a crucial role in the induction of IL-8. Through reverse genetics, we generated two mutant viruses (rQ35-2A and rR113A), which showed lower induction of IL-8 in PAMs during infection. This finding uncovers a previously unrecognized role of the PRRSV nucleocapsid protein in modulating IL-8 production and provides insight into an additional mechanism by which PRRSV modulates immune responses and inflammation.
Collapse
Affiliation(s)
- Xingyu Gong
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, China
| | - Tianyi Ma
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, China
| | - Jingjing Wang
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, China
| | - Xinran Cao
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, China
| | - Qiaoya Zhang
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, 266000, China
| | - Yanhong Wang
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, China
| | - Chengchuang Song
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, China
| | - Min Lai
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, China
| | - Chunlei Zhang
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, China
| | - Xingtang Fang
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, China.
| | - Xi Chen
- Institute of Cellular and Molecular Biology, School of Life Science, Jiangsu Normal University, China.
| |
Collapse
|
4
|
Porcine Reproductive and Respiratory Syndrome Virus Modulates the Switch of Macrophage Polarization from M1 to M2 by Upregulating MoDC-Released sCD83. Viruses 2023; 15:v15030773. [PMID: 36992481 PMCID: PMC10054646 DOI: 10.3390/v15030773] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/16/2023] [Accepted: 03/16/2023] [Indexed: 03/22/2023] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV), the most economically important infectious disease of pigs, elicits poor innate and adaptive immune responses. Soluble CD83 (sCD83), a secretion from various immune cell populations, especially MoDCs, is involved in negatively regulating the immune response. We speculate sCD83 may be a critical factor in the process of PRRSV-coordinated macrophage polarization. In this study, we found that PAMs co-cultured with PRRSV-infected MoDCs inhibited the M1 macrophage while enhancing the M2 macrophage. This was accompanied by a decrease in the pro-inflammatory cytokine TNF-α and iNOS and an increase in the anti-inflammatory cytokine IL-10 and Arg1. Meanwhile, sCD83 incubation causes the same specific effects lead to a switch in macrophage from M1 to M2. Neutralization of sCD83 removes the inhibitory effects of PRRSV on PAMs. Using reverse genetics, we generated recombinant PRRSVs with mutations in N protein, nsp1α, and nsp10 (knockout sCD83-concerned key amino acid site). Four mutant viruses lost the suppression of M1 macrophage markers, in contrast to the restriction of the upregulation of M2 macrophage markers. These findings suggest that PRRSV modulates the switch of macrophage polarization from M1 to M2 by upregulating the MoDC-induced secretion of CD83, providing new insights into the mechanism by which PRRSV regulates host immunity.
Collapse
|
5
|
A New Long Noncoding RNA, MAHAT, Inhibits Replication of Porcine Reproductive and Respiratory Syndrome Virus by Recruiting DDX6 To Bind to ZNF34 and Promote an Innate Immune Response. J Virol 2022; 96:e0115422. [PMID: 36073922 PMCID: PMC9517731 DOI: 10.1128/jvi.01154-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Long noncoding RNAs (lncRNAs) have increasingly been recognized as being integral to cellular processes, including the antiviral immune response. Porcine reproductive and respiratory syndrome virus (PRRSV) is costly to the global swine industry. To identify PRRSV-related lncRNAs, we performed RNA deep sequencing and compared the profiles of lncRNAs in PRRSV-infected and uninfected Marc-145 cells. We identified a novel lncRNA called MAHAT (maintaining cell morphology-associated and highly conserved antiviral transcript; LTCON_00080558) that inhibits PRRSV replication. MAHAT binds and negatively regulates ZNF34 expression by recruiting and binding DDX6, an RNA helicase forming a complex with ZNF34. Inhibition of ZNF34 expression results in increased type I interferon expression and decreased PRRSV replication. This finding reveals a novel mechanism by which PRRSV evades the host antiviral innate immune response by downregulating the MAHAT-DDX6-ZNF34 pathway. MAHAT could be a host factor target for antiviral therapies against PRRSV infection. IMPORTANCE Long noncoding RNAs (lncRNAs) play important roles in viral infection by regulating the transcription and expression of host genes, and interferon signaling pathways. Porcine reproductive and respiratory syndrome virus (PRRSV) causes huge economic losses in the swine industry worldwide, but the mechanisms of its pathogenesis and immunology are not fully understood. Here, a new lncRNA, designated MAHAT, was identified as a regulator of host innate immune responses. MAHAT negatively regulates the expression of its target gene, ZNF34, by recruiting and binding DDX6, an RNA helicase, forming a complex with ZNF34. Inhibition of ZNF34 expression increases type I interferon expression and decreases PRRSV replication. This finding suggests that MAHAT has potential as a new target for developing antiviral drugs against PRRSV infection.
Collapse
|
6
|
Mapping the Key Residues within the Porcine Reproductive and Respiratory Syndrome Virus nsp1α Replicase Protein Required for Degradation of Swine Leukocyte Antigen Class I Molecules. Viruses 2022; 14:v14040690. [PMID: 35458420 PMCID: PMC9030574 DOI: 10.3390/v14040690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/22/2022] [Accepted: 03/22/2022] [Indexed: 02/05/2023] Open
Abstract
The nonstructural protein 1α (nsp1α) of the porcine reproductive and respiratory syndrome virus (PRRSV) has been shown to target swine leukocyte antigen class I (SLA-I) for degradation, but the molecular details remain unclear. In this report, we further mapped the critical residues within nsp1α by site-directed mutagenesis. We identified a cluster of residues (i.e., Phe17, Ile81, Phe82, Arg86, Thr88, Gly90, Asn91, Phe94, Arg97, Thr160, and Asn161) necessary for this function. Interestingly, they are all located in a structurally relatively concentrated region. Further analysis by reverse genetics led to the generation of two viable viral mutants, namely, nsp1α-G90A and nsp1α-T160A. Compared to WT, nsp1α-G90A failed to co-localize with either chain of SLA-I within infected cells, whereas nsp1α-T160A exhibited a partial co-localization relationship. Consequently, the mutant nsp1α-G90A exhibited an impaired ability to downregulate SLA-I in infected macrophages as demonstrated by Western blot, indirect immunofluorescence, and flow cytometry analysis. Consistently, the ubiquitination level of SLA-I was significantly reduced in the conditions of both infection and transfection. Together, our results provide further insights into the mechanism underlying PRRSV subversion of host immunity and have important implications in vaccine development.
Collapse
|
7
|
Zhao J, Li R, Li Y, Chen J, Feng F, Sun C. Broadly Antiviral Activities of TAP1 through Activating the TBK1-IRF3-Mediated Type I Interferon Production. Int J Mol Sci 2021; 22:ijms22094668. [PMID: 33925089 PMCID: PMC8125511 DOI: 10.3390/ijms22094668] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/25/2021] [Accepted: 04/25/2021] [Indexed: 12/31/2022] Open
Abstract
Deeply understanding the virus-host interaction is a prerequisite for developing effective anti-viral strategies. Traditionally, the transporter associated with antigen processing type 1 (TAP1) is critical for antigen presentation to regulate adaptive immunity. However, its role in controlling viral infections through modulating innate immune signaling is not yet fully understood. In the present study, we reported that TAP1, as a product of interferon-stimulated genes (ISGs), had broadly antiviral activity against various viruses such as herpes simplex virus 1 (HSV-1), adenoviruses (AdV), vesicular stomatitis virus (VSV), dengue virus (DENV), Zika virus (ZIKV), and influenza virus (PR8) etc. This antiviral activity by TAP1 was further confirmed by series of loss-of-function and gain-of-function experiments. Our further investigation revealed that TAP1 significantly promoted the interferon (IFN)-β production through activating the TANK binding kinase-1 (TBK1) and the interferon regulatory factor 3 (IRF3) signaling transduction. Our work highlighted the broadly anti-viral function of TAP1 by modulating innate immunity, which is independent of its well-known function of antigen presentation. This study will provide insights into developing novel vaccination and immunotherapy strategies against emerging infectious diseases.
Collapse
MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 2/antagonists & inhibitors
- ATP Binding Cassette Transporter, Subfamily B, Member 2/deficiency
- ATP Binding Cassette Transporter, Subfamily B, Member 2/genetics
- ATP Binding Cassette Transporter, Subfamily B, Member 2/immunology
- Animals
- Antiviral Agents/immunology
- Gene Knockout Techniques
- HEK293 Cells
- Host Microbial Interactions/immunology
- Humans
- Immunity, Innate
- Interferon Regulatory Factor-3/immunology
- Interferon Type I/biosynthesis
- Mice
- Models, Immunological
- Protein Serine-Threonine Kinases/immunology
- RAW 264.7 Cells
- Toll-Like Receptors/agonists
- Virus Diseases/immunology
Collapse
Affiliation(s)
- Jin Zhao
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou 514400, China; (J.Z.); (R.L.); (Y.L.); (J.C.); (F.F.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 514400, China
| | - Ruiting Li
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou 514400, China; (J.Z.); (R.L.); (Y.L.); (J.C.); (F.F.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 514400, China
| | - Yanjun Li
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou 514400, China; (J.Z.); (R.L.); (Y.L.); (J.C.); (F.F.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 514400, China
| | - Jiaoshan Chen
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou 514400, China; (J.Z.); (R.L.); (Y.L.); (J.C.); (F.F.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 514400, China
| | - Fengling Feng
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou 514400, China; (J.Z.); (R.L.); (Y.L.); (J.C.); (F.F.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 514400, China
| | - Caijun Sun
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou 514400, China; (J.Z.); (R.L.); (Y.L.); (J.C.); (F.F.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 514400, China
- Correspondence: ; Tel.: +86-20-83226383
| |
Collapse
|
8
|
Song Z, Bai J, Liu X, Nauwynck H, Wu J, Liu X, Jiang P. S100A9 regulates porcine reproductive and respiratory syndrome virus replication by interacting with the viral nucleocapsid protein. Vet Microbiol 2019; 239:108498. [PMID: 31767072 PMCID: PMC7125916 DOI: 10.1016/j.vetmic.2019.108498] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 10/27/2019] [Accepted: 11/01/2019] [Indexed: 11/28/2022]
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) has caused huge economic losses to the pig industry worldwide over the last 30 years, yet the associated viral-host interactions remain poorly understood. S100A9 is a damage-associated molecular pattern of the S100 protein family. Here, we found that PRRSV infection stimulated S100A9 expression in porcine alveolar macrophages (PAMs) and Marc-145 cells. S100A9 inhibited PRRSV replication via cellular Ca2+ dependent manner. The viral nucleocapsid (N) protein co-localized with S100A9 in the cytoplasm, and directly interacted at amino acid 78 of S100A9 and amino acids 36-37 of N protein. Moreover, we also found that the mutant S100A9 (E78Q) protein exhibited decreased antiviral activity against PRRSV compared with the parent S100A9. Recombinant PRRSV rBB (36/37) with two mutations in amino acid 36-37 in the N protein exhibited greater replication than the parent PRRSV BB0907 in S100A9-overexpressed PAM and Marc-145 cells. Thus, S100A9 may restrict PRRSV proliferation by interacting with the viral N protein.
Collapse
Affiliation(s)
- Zhongbao Song
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Juan Bai
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Xuewei Liu
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Hans Nauwynck
- Laboratory of Virology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium
| | - Jiaqiang Wu
- Institute of Animal Husbandry and Veterinary Medicine, Shandong Academy of Agricultural Science, Jinan 250100, China
| | - Xing Liu
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biologicals Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-products, Nanjing 210014, China.
| | - Ping Jiang
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China.
| |
Collapse
|
9
|
Liu X, Bai J, Jiang C, Song Z, Zhao Y, Nauwynck H, Jiang P. Therapeutic effect of Xanthohumol against highly pathogenic porcine reproductive and respiratory syndrome viruses. Vet Microbiol 2019; 238:108431. [PMID: 31648725 DOI: 10.1016/j.vetmic.2019.108431] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 09/25/2019] [Accepted: 09/25/2019] [Indexed: 12/17/2022]
Abstract
The infection by porcine reproductive and respiratory syndrome virus (PRRSV) has a severe impact on the world swine industry. However, commercially available vaccines provide only incomplete protection against this disease. Thus, novel approaches to control PRRSV infection are essential for the robust and sustainable swine industry. In our previous study, Xanthohumol (Xn), a prenylated flavonoid extracted for hops (Humulus lupulus L), was screened from 386 natural products to inhibit PRRSV proliferation and alleviate oxidative stress induced by PRRSV via the Nrf2-HMOX1 axis in Marc-145 cells. In this study, we furtherly found that Xn could inhibit PRRSV different sub-genotype strains infection with a low IC50 value in porcine primary alveolar macrophages (PAMs). In addition, it caused decreased expression of interleukin (IL)-1β, IL-6, IL-8, and tumor necrosis factor-α in PAMs infected with PRRSV or treated with lipopolysaccharide. Animal challenge experiments showed that Xn effectively alleviated clinical signs, lung pathology, and inflammatory responses in lung tissues of pigs induced by highly pathogenic PRRSV infection. The results demonstrate that Xn is a promising therapeutic agent to combat PRRSV infections.
Collapse
Affiliation(s)
- Xuewei Liu
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Juan Bai
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Chenlong Jiang
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhongbao Song
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yongxiang Zhao
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Hans Nauwynck
- Laboratory of Virology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke Merelbeke, Belgium
| | - Ping Jiang
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China.
| |
Collapse
|
10
|
Liu X, Song Z, Bai J, Nauwynck H, Zhao Y, Jiang P. Xanthohumol inhibits PRRSV proliferation and alleviates oxidative stress induced by PRRSV via the Nrf2-HMOX1 axis. Vet Res 2019; 50:61. [PMID: 31506103 PMCID: PMC6737628 DOI: 10.1186/s13567-019-0679-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 07/23/2019] [Indexed: 12/11/2022] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) is a prevalent and endemic swine pathogen that causes significant economic losses in the global swine industry. Commercial vaccines provide limited protection against this virus, and no highly effective therapeutic drugs are yet available. In this study, we first screened a library of 386 natural products and found that xanthohumol (Xn), a prenylated flavonoid found in hops, displayed high anti-PRRSV activity by inhibiting PRRSV adsorption onto and internalization into cells. Transcriptome sequencing revealed that Xn treatment stimulates genes associated with the antioxidant response in the nuclear factor-erythroid 2-related factor 2 (Nrf2) signalling pathway. Xn causes increased expression of Nrf2, HMOX1, GCLC, GCLM, and NQO1 in Marc-145 cells. The action of Xn against PRRSV proliferation depends on Nrf2 in Marc-145 cells and porcine alveolar macrophages (PAMs). This finding suggests that Xn significantly inhibits PRRSV proliferation and decreases viral-induced oxidative stress by activating the Nrf2–HMOX1 pathway. This information should be helpful for developing a novel prophylactic and therapeutic strategy against PRRSV infection.
Collapse
Affiliation(s)
- Xuewei Liu
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhongbao Song
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Juan Bai
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Hans Nauwynck
- Laboratory of Virology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Yongxiang Zhao
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ping Jiang
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China.
| |
Collapse
|
11
|
ZAP, a CCCH-Type Zinc Finger Protein, Inhibits Porcine Reproductive and Respiratory Syndrome Virus Replication and Interacts with Viral Nsp9. J Virol 2019; 93:JVI.00001-19. [PMID: 30867303 DOI: 10.1128/jvi.00001-19] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Accepted: 03/04/2019] [Indexed: 01/27/2023] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) is one of the most economically important pathogens affecting many swine-producing regions. Current vaccination strategies and antiviral drugs provide only limited protection. PRRSV infection can cleave mitochondrial antiviral signaling protein (MAVS) and inhibit the induction of type I interferon. The antiviral effector molecules that are involved in host protective responses to PRRSV infection are not fully understood. Here, by using transcriptome sequencing, we found that a zinc finger antiviral protein, ZAP, is upregulated in MAVS-transfected Marc-145 cells and that ZAP suppresses PRRSV infection at the early stage of replication. We also found that the viral protein Nsp9, an RNA-dependent RNA polymerase (RdRp), interacts with ZAP. The interacting locations were mapped to the zinc finger domain of ZAP and N-terminal amino acids 150 to 160 of Nsp9. These findings suggest that ZAP is an effective antiviral factor for suppressing PRRSV infection, and they shed light on virus-host interaction.IMPORTANCE PRRSV continues to adversely impact the global swine industry. It is important to understand the various antiviral factors against PRRSV infection. Here, a zinc finger protein, termed ZAP, was screened from MAVS-induced antiviral genes by transcriptome sequencing, and it was found to remarkably suppress PRRSV replication and interact with PRRSV Nsp9. The zinc finger domain of ZAP and amino acids 150 to 160 of Nsp9 are responsible for the interaction. These findings expand the antiviral spectrum of ZAP and provide a better understanding of ZAP antiviral mechanisms, as well as virus-host interactions.
Collapse
|
12
|
Cellular Innate Immunity against PRRSV and Swine Influenza Viruses. Vet Sci 2019; 6:vetsci6010026. [PMID: 30862035 PMCID: PMC6466325 DOI: 10.3390/vetsci6010026] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 02/21/2019] [Accepted: 02/27/2019] [Indexed: 12/11/2022] Open
Abstract
Porcine respiratory disease complex (PRDC) is a polymicrobial syndrome that results from a combination of infectious agents, such as environmental stressors, population size, management strategies, age, and genetics. PRDC results in reduced performance as well as increased mortality rates and production costs in the pig industry worldwide. This review focuses on the interactions of two enveloped RNA viruses—porcine reproductive and respiratory syndrome virus (PRRSV) and swine influenza virus (SwIV)—as major etiological agents that contribute to PRDC within the porcine cellular innate immunity during infection. The innate immune system of the porcine lung includes alveolar and parenchymal/interstitial macrophages, neutrophils (PMN), conventional dendritic cells (DC) and plasmacytoid DC, natural killer cells, and γδ T cells, thus the in vitro and in vivo interactions between those cells and PRRSV and SwIV are reviewed. Likewise, the few studies regarding PRRSV-SwIV co-infection are illustrated together with the different modulation mechanisms that are induced by the two viruses. Alterations in responses by natural killer (NK), PMN, or γδ T cells have not received much attention within the scientific community as their counterpart antigen-presenting cells and there are numerous gaps in the knowledge regarding the role of those cells in both infections. This review will help in paving the way for future directions in PRRSV and SwIV research and enhancing the understanding of the innate mechanisms that are involved during infection with these viruses.
Collapse
|
13
|
Montaner-Tarbes S, Del Portillo HA, Montoya M, Fraile L. Key Gaps in the Knowledge of the Porcine Respiratory Reproductive Syndrome Virus (PRRSV). Front Vet Sci 2019; 6:38. [PMID: 30842948 PMCID: PMC6391865 DOI: 10.3389/fvets.2019.00038] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 01/30/2019] [Indexed: 12/11/2022] Open
Abstract
The porcine reproductive and respiratory syndrome virus (PRRSV) is one of the most important swine diseases in the world. It is causing an enormous economic burden due to reproductive failure in sows and a complex respiratory syndrome in pigs of all ages, with mortality varying from 2 to 100% in the most extreme cases of emergent highly pathogenic strains. PRRSV displays complex interactions with the immune system and a high mutation rate, making the development, and implementation of control strategies a major challenge. In this review, the biology of the virus will be addressed focusing on newly discovered functions of non-structural proteins and novel dissemination mechanisms. Secondly, the role of different cell types and viral proteins will be reviewed in natural and vaccine-induced immune response together with the role of different immune evasion mechanisms focusing on those gaps of knowledge that are critical to generate more efficacious vaccines. Finally, novel strategies for antigen discovery and vaccine development will be discussed, in particular the use of exosomes (extracellular vesicles of endocytic origin). As nanocarriers of lipids, proteins and nucleic acids, exosomes have potential effects on cell activation, modulation of immune responses and antigen presentation. Thus, representing a novel vaccination approach against this devastating disease.
Collapse
Affiliation(s)
- Sergio Montaner-Tarbes
- Innovex Therapeutics S.L, Badalona, Spain.,Departamento de Ciencia Animal, Escuela Técnica Superior de Ingenieria Agraria (ETSEA), Universidad de Lleida, Lleida, Spain
| | - Hernando A Del Portillo
- Innovex Therapeutics S.L, Badalona, Spain.,Germans Trias i Pujol Health Science Research Institute, Badalona, Spain.,ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
| | - María Montoya
- Innovex Therapeutics S.L, Badalona, Spain.,Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Cientificas, Madrid, Spain
| | - Lorenzo Fraile
- Innovex Therapeutics S.L, Badalona, Spain.,Departamento de Ciencia Animal, Escuela Técnica Superior de Ingenieria Agraria (ETSEA), Universidad de Lleida, Lleida, Spain
| |
Collapse
|