1
|
Pang Y, Wang Y, Li C, Liu J, Duan C, Zhou Y, Fang L, Xiao S. Itaconate derivative 4-OI inhibits PRRSV proliferation and associated inflammatory response. Virology 2022; 577:84-90. [PMID: 36323047 DOI: 10.1016/j.virol.2022.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/18/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022]
Abstract
Itaconate, a metabolite of the tricarboxylic acid (TCA) cycle produced by immunoresponsive gene 1 (IRG1) via catalyzation of cis-aconitate, plays important roles in metabolism and immunity. Porcine reproductive and respiratory syndrome virus (PRRSV) is an Arterivirus that has devastated the swine industry worldwide for over 30 years. Here, we found that 4-octyl itaconate (4-OI), a cell-permeable itaconate derivative, dose-dependently inhibited PRRSV proliferation by interfering with viral attachment, replication, and release. Furthermore, 4-OI suppressed the PRRSV-induced inflammatory response by enhancing nuclear factor erythroid 2-related factor 2 (Nrf2) signaling. Interestingly, PRRSV infection caused a reduction in itaconate abundance and simultaneously led to an accumulation of cis-aconitate, the upstream metabolite of itaconate, and both of these effects were accomplished by downregulating IRG1 expression. Taken together, these results demonstrate that 4-OI not only inhibits PRRSV replication but also suppresses PRRSV-induced inflammatory responses, indicating that 4-OI is a promising drug candidate for combating PRRSV.
Collapse
Affiliation(s)
- Yu Pang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China; The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, China
| | - Yuchen Wang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China; The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, China
| | - Chenyu Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China; The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, China
| | - Jiao Liu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China; The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, China
| | - Chenrui Duan
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China; The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, China
| | - Yanrong Zhou
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China; The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, China
| | - Liurong Fang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China; The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, China
| | - Shaobo Xiao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China; The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, China.
| |
Collapse
|
2
|
Murugaiah V, Varghese PM, Beirag N, DeCordova S, Sim RB, Kishore U. Complement Proteins as Soluble Pattern Recognition Receptors for Pathogenic Viruses. Viruses 2021; 13:v13050824. [PMID: 34063241 PMCID: PMC8147407 DOI: 10.3390/v13050824] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 04/28/2021] [Indexed: 12/11/2022] Open
Abstract
The complement system represents a crucial part of innate immunity. It contains a diverse range of soluble activators, membrane-bound receptors, and regulators. Its principal function is to eliminate pathogens via activation of three distinct pathways: classical, alternative, and lectin. In the case of viruses, the complement activation results in effector functions such as virion opsonisation by complement components, phagocytosis induction, virolysis by the membrane attack complex, and promotion of immune responses through anaphylatoxins and chemotactic factors. Recent studies have shown that the addition of individual complement components can neutralise viruses without requiring the activation of the complement cascade. While the complement-mediated effector functions can neutralise a diverse range of viruses, numerous viruses have evolved mechanisms to subvert complement recognition/activation by encoding several proteins that inhibit the complement system, contributing to viral survival and pathogenesis. This review focuses on these complement-dependent and -independent interactions of complement components (especially C1q, C4b-binding protein, properdin, factor H, Mannose-binding lectin, and Ficolins) with several viruses and their consequences.
Collapse
Affiliation(s)
- Valarmathy Murugaiah
- Biosciences, College of Health, Medicine and Life Sciences, Brunel University London, Uxbridge UB8 3PH, UK; (V.M.); (P.M.V.); (N.B.); (S.D.)
| | - Praveen M. Varghese
- Biosciences, College of Health, Medicine and Life Sciences, Brunel University London, Uxbridge UB8 3PH, UK; (V.M.); (P.M.V.); (N.B.); (S.D.)
| | - Nazar Beirag
- Biosciences, College of Health, Medicine and Life Sciences, Brunel University London, Uxbridge UB8 3PH, UK; (V.M.); (P.M.V.); (N.B.); (S.D.)
| | - Syreeta DeCordova
- Biosciences, College of Health, Medicine and Life Sciences, Brunel University London, Uxbridge UB8 3PH, UK; (V.M.); (P.M.V.); (N.B.); (S.D.)
| | - Robert B. Sim
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK;
| | - Uday Kishore
- Biosciences, College of Health, Medicine and Life Sciences, Brunel University London, Uxbridge UB8 3PH, UK; (V.M.); (P.M.V.); (N.B.); (S.D.)
- Correspondence: or
| |
Collapse
|
3
|
Li L, Yu X, Zhang H, Cheng H, Hou L, Zheng Q, Hou J. In vitro antiviral activity of Griffithsin against porcine epidemic diarrhea virus. Virus Genes 2019; 55:174-181. [PMID: 30637608 PMCID: PMC7089098 DOI: 10.1007/s11262-019-01633-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 01/02/2019] [Indexed: 02/07/2023]
Abstract
Griffithsin is a lectin with potent antiviral activity against enveloped viruses. The objective of this study was to assess Griffithsin’s inhibitory effect on porcine epidemic diarrhea virus (PEDV). The results showed that Griffithsin reduced PEDV infection of Vero cells by approximately 82.8%. Moreover, using time-of-addition assays and RT-qPCR, we found that delayed addition of Griffithsin had a weaker inhibitory effect on PEDV than earlier treatment. The mechanism of Griffithsin’s action against PEDV involved both preventing viral attachment to host cells and disrupting cell-to-cell transmission; its dual mode of action distinguished Griffithsin from most other antiviral drugs. In conclusion, Griffithsin was identified as a potent PEDV inhibitor and may represent a candidate drug for preventing PEDV infection.
Collapse
Affiliation(s)
- Lan Li
- National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, China
| | - Xiaoming Yu
- National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, China
| | - Haoming Zhang
- National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, China
| | - Haiwei Cheng
- National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, China
| | - Liting Hou
- National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, China
| | - Qisheng Zheng
- National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, China.
| | - Jibo Hou
- National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, China.
| |
Collapse
|
4
|
Li L, Tian X, Chen J, Li P, Zheng Q, Hou J. Griffithsin inhibits porcine reproductive and respiratory syndrome virus infection in vitro. Arch Virol 2018; 163:3317-3325. [PMID: 30220033 PMCID: PMC7087274 DOI: 10.1007/s00705-018-4029-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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: 05/18/2018] [Accepted: 08/01/2018] [Indexed: 11/28/2022]
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) is a pathogen that severely disrupts swine production. Despite sustained efforts, the disease is still endemic, with high mortality and morbidity. New antiviral strategies to control PRRSV are needed. Griffithsin, a red algal lectin, has potent antiviral effect on several human enveloped viruses, but this effect has not been demonstrated on PRRSV. Here, we first tested the in vitro antiviral activity of Griffithsin against PRRSV. Griffithsin exerted strong saccharide-dependent antiviral activity against PRRSV, probably through interactions with glycans on the surface of PRRSV that interfered with virus entry. Furthermore we revealed that Griffithsin’s action on PRRSV involved blocking viral adsorption, and it had no effect on viral penetration. Besides Our findings also suggested that Griffithsin may interfere with cell-to-cell spread to prevent virus transmission. The remarkable potency profile of Griffithsin supports its potential value as an antiviral agent against PRRSV.
Collapse
Affiliation(s)
- Lan Li
- National Research, Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, People's Republic of China
| | - Xiaoning Tian
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, People's Republic of China
| | - Jin Chen
- National Research, Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, People's Republic of China
| | - Pengcheng Li
- National Research, Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, People's Republic of China
| | - Qisheng Zheng
- National Research, Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, People's Republic of China.
| | - Jibo Hou
- National Research, Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, People's Republic of China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, People's Republic of China.
| |
Collapse
|
5
|
Li L, Zheng Q, Zhang Y, Li P, Fu Y, Hou J, Xiao X. Antiviral activity of recombinant porcine surfactant protein A against porcine reproductive and respiratory syndrome virus in vitro. Arch Virol 2016; 161:1883-90. [PMID: 27101074 PMCID: PMC7086670 DOI: 10.1007/s00705-016-2838-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 11/08/2015] [Accepted: 03/18/2016] [Indexed: 02/03/2023]
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) has caused significant economic losses in the swine industry worldwide. However, there is not an ideal vaccine to provide complete protection against PRRSV. Thus, the need for new antiviral strategies to control PRRSV still remains. Surfactant protein A (SP-A) belongs to the family of C-type lectins, which can exert antiviral activities. In this present study, we assessed the antiviral properties of recombinant porcine SP-A (RpSP-A) on PRRSV infection in Marc 145 cells and revealed its antiviral mechanism using a plaque assay, real-time qPCR, western blotting analysis and an attachment and penetration assay. Our results showed that RpSP-A could inhibit the infectivity of PRRSV in Marc 145 cells and could reduce the total RNA and protein level. The attachment assay indicated that RpSP-A in the presence of Ca2+ could largely inhibit Marc 145 cell attachment; however, in the penetration assay, it was relatively inactive. Furthermore, our study suggested that virus progeny released from infected Marc145 cells were blocked by RpSP-A from infecting other cells. We conclude that RpSP-A has antiviral activity against PRRSV, most probably by blocking viral attachment and the cell-to-cell transmission pathway, and therefore, RpSP-A holds promise as a novel antiviral agent against PRRSV.
Collapse
Affiliation(s)
- Lan Li
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Qisheng Zheng
- National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, People's Republic of China
| | - Yuanpeng Zhang
- National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, People's Republic of China
| | - Pengcheng Li
- National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, People's Republic of China
| | - Yanfeng Fu
- Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, People's Republic of China
| | - Jibo Hou
- National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, People's Republic of China.
| | - Xilong Xiao
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China.
| |
Collapse
|
6
|
Li J, Tao S, Orlando R, Murtaugh MP. N-glycosylation profiling of porcine reproductive and respiratory syndrome virus envelope glycoprotein 5. Virology 2015; 478:86-98. [PMID: 25726973 DOI: 10.1016/j.virol.2015.02.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Revised: 02/05/2015] [Accepted: 02/09/2015] [Indexed: 02/04/2023]
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) is a positive-sense ssRNA virus whose envelope contains four glycoproteins and three nonglycosylated proteins. Glycans of major envelope glycoprotein 5 (GP5) are proposed as important for virus assembly and entry into permissive cells. Structural characterization of GP5 glycans would facilitate the mechanistic understanding of these processes. Thus, we purified the PRRSV type 2 prototype strain, VR2332, and analyzed the virion-associated glycans by both biochemical and mass spectrometric methods. Endoglycosidase digestion showed that GP5 was the primary protein substrate, and that the carbohydrate moieties were primarily complex-type N-glycans. Mass spectrometric analysis (HPLC-ESI-MS/MS) of GP5 N-glycans revealed an abundance of N-acetylglucosamine (GlcNAc) and N-acetyllactosamine (LacNAc) oligomers in addition to sialic acids. GlcNAc and LacNAc accessibility to ligands was confirmed by lectin co-precipitation. Our findings help to explain PRRSV infection of cells lacking sialoadhesin and provide a glycan database to facilitate molecular structural studies of PRRSV.
Collapse
Affiliation(s)
- Juan Li
- Department of Veterinary and Biomedical Sciences, University of Minnesota, 1971 Commonwealth Ave., St. Paul, MN 51108, USA
| | - Shujuan Tao
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Rd., Athens, GA 30602, USA
| | - Ron Orlando
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Rd., Athens, GA 30602, USA
| | - Michael P Murtaugh
- Department of Veterinary and Biomedical Sciences, University of Minnesota, 1971 Commonwealth Ave., St. Paul, MN 51108, USA.
| |
Collapse
|
7
|
Abstract
In the innate immune system, a variety of recognition molecules provide the first-line host defense to prevent infection and maintain endogenous homeostasis. Ficolin is a soluble recognition molecule, which senses pathogen-associated molecular patterns on microbes and aberrant sugar structures on self-cells. It consists of a collagen-like stalk and a globular fibrinogen-like domain, the latter binding to carbohydrates such as N-acetylglucosamine. Ficolins have been widely identified in animals from higher invertebrates to mammals. In mammals, ficolins form complexes with mannose-binding lectin-associated serine proteases (MASPs), and ficolin-MASP complexes trigger complement activation via the lectin pathway. Once activated, complement mediates many immune responses including opsonization, phagocytosis, and cytokine production. Although the precise function of each ficolin is still under investigation, accumulating information suggests that ficolins have a crucial role in host defense by recognizing a variety of microorganisms and interacting with effector proteins.
Collapse
Affiliation(s)
- Yuichi Endo
- Department of Immunology, Fukushima Medical University School of Medicine, Fukushima, Japan; Radioisotope Research Center, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Misao Matsushita
- Department of Applied Biochemistry, Tokai University, Kanagawa, Japan
| | - Teizo Fujita
- Department of Immunology, Fukushima Medical University School of Medicine, Fukushima, Japan; Fukushima General Hygiene Institute, Fukushima, Japan
| |
Collapse
|
8
|
Li J, Murtaugh MP. Functional analysis of porcine reproductive and respiratory syndrome virus N-glycans in infection of permissive cells. Virology 2015; 477:82-88. [PMID: 25662311 DOI: 10.1016/j.virol.2015.01.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Accepted: 01/06/2015] [Indexed: 11/17/2022]
Abstract
The role of envelope protein-linked N-glycans in porcine reproductive and respiratory syndrome virus (PRRSV) infection of permissive cells was examined. N-acetylglucosamine (GlcNAc) and N-acetyllactosamine (LacNAc) oligomer-specific lectins bound to PRRSV and blocked virus attachment, resulting in reduced viral infection. However, addition of GlcNAc oligomers and LacNAc to cell culture together with PRRSV did not block infection. Removal or alteration of envelope protein-linked N-glycans also did not affect virus infection, indicating that PRRSV N-glycans are not required for virus infection. These findings show that steric hindrance of glycans on the PRRSV envelope by lectins or, presumably, other space-filling molecules, may interfere nonspecifically with infection by blocking protein interactions with cell surface receptors. Glycans themselves appear not to be required for infection of permissive cells, but may have important roles in avoidance of host immunity and in protein structure, intracellular virion growth and assembly.
Collapse
Affiliation(s)
- Juan Li
- Department of Veterinary and Biomedical Sciences, University of Minnesota, 1971 Commonwealth Avenue, St. Paul, MN 55108, USA
| | - Michael P Murtaugh
- Department of Veterinary and Biomedical Sciences, University of Minnesota, 1971 Commonwealth Avenue, St. Paul, MN 55108, USA.
| |
Collapse
|
9
|
Abstract
Innate recognition of virus proteins is an important component of the immune response to viral pathogens. A component of this immune recognition is the family of lectins; pattern recognition receptors (PRRs) that recognise viral pathogen-associated molecular patterns (PAMPs) including viral glycoproteins. In this review we discuss the contribution of soluble and membrane-associated PRRs to immunity against virus pathogens, and the potential role of these molecules in facilitating virus replication. These processes are illustrated with examples of viruses including human immunodeficiency virus (HIV), hepatitis C virus (HCV) and Ebola virus (EBOV). We focus on the structure, function and genetics of the well-characterised C-type lectin mannose-binding lectin, the ficolins, and the membrane-bound CD209 proteins expressed on dendritic cells. The potential for lectin-based antiviral therapies is also discussed.
Collapse
|
10
|
Hamed MR, Brown RJ, Zothner C, Urbanowicz RA, Mason CP, Krarup A, McClure CP, Irving WL, Ball JK, Harris M, Hickling TP, Tarr AW. Recombinant human L-ficolin directly neutralizes hepatitis C virus entry. J Innate Immun 2014; 6:676-84. [PMID: 24854201 PMCID: PMC6741592 DOI: 10.1159/000362209] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2013] [Revised: 03/16/2014] [Accepted: 03/16/2014] [Indexed: 12/25/2022] Open
Abstract
L-ficolin is a soluble pattern recognition molecule expressed by the liver that contributes to innate immune defense against microorganisms. It is well described that binding of L-ficolin to specific pathogen-associated molecular patterns activates the lectin complement pathway, resulting in opsonization and lysis of pathogens. In this study, we demonstrated that in addition to this indirect effect, L-ficolin has a direct neutralizing effect against hepatitis C virus (HCV) entry. Specific, dose-dependent binding of recombinant L-ficolin to HCV glycoproteins E1 and E2 was observed. This interaction was inhibited by soluble L-ficolin ligands. Interaction of L-ficolin with E1 and E2 potently inhibited entry of retroviral pseudoparticles bearing these glycoproteins. L-ficolin also inhibited entry of cell-cultured HCV in a calcium-dependent manner. Neutralizing concentrations of L-ficolin were found to be circulating in the serum of HCV-infected individuals. This is the first description of direct neutralization of HCV entry by a ficolin and highlights a novel role for L-ficolin as a virus entry inhibitor.
Collapse
Affiliation(s)
- Mohamed R. Hamed
- School of Life Sciences, and Nottingham Digestive Diseases Biomedical Research Unit, University of Nottingham, Nottingham, UK
- Medical Microbiology and Immunology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Richard J.P. Brown
- School of Life Sciences, and Nottingham Digestive Diseases Biomedical Research Unit, University of Nottingham, Nottingham, UK
| | - Carsten Zothner
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Richard A. Urbanowicz
- School of Life Sciences, and Nottingham Digestive Diseases Biomedical Research Unit, University of Nottingham, Nottingham, UK
| | - Christopher P. Mason
- School of Life Sciences, and Nottingham Digestive Diseases Biomedical Research Unit, University of Nottingham, Nottingham, UK
| | - Anders Krarup
- Biochemistry Department, University of Oxford, Oxford, UK
| | - C. Patrick McClure
- School of Life Sciences, and Nottingham Digestive Diseases Biomedical Research Unit, University of Nottingham, Nottingham, UK
| | - William L. Irving
- School of Life Sciences, and Nottingham Digestive Diseases Biomedical Research Unit, University of Nottingham, Nottingham, UK
| | - Jonathan K. Ball
- School of Life Sciences, and Nottingham Digestive Diseases Biomedical Research Unit, University of Nottingham, Nottingham, UK
| | - Mark Harris
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Timothy P. Hickling
- School of Life Sciences, and Nottingham Digestive Diseases Biomedical Research Unit, University of Nottingham, Nottingham, UK
| | - Alexander W. Tarr
- School of Life Sciences, and Nottingham Digestive Diseases Biomedical Research Unit, University of Nottingham, Nottingham, UK
| |
Collapse
|
11
|
Abstract
Ficolins are serum complement lectins, with a structure similar to mannose-binding lectin (MBL) and lung surfactant protein (SP)-A and SP-D. Ficolins activate the lectin complement system and play important roles in host innate immunity. Ficolins are members of the collectin family of proteins, which act as pattern recognition receptors (PRRs). They are soluble oligomeric defense proteins with lectin-like activity, and are able to recognize pathogen-associated molecular patterns (PAMPs), which are carbohydrate molecules on the surface of pathogens, and of apoptotic, necrotic, and malignant cells. Upon binding to their specific PAMPs, ficolins may trigger activation of the immune system either (1) by initiating activation of complement via the lectin pathway, (2) by a primitive type of opsonophagocytosis, or (3) by stimulating secretion of the inflammatory cytokines interferon (IFN)-Γ, interleukin (IL)-17, IL-6, and tumor necrosis factor (TNF)-α, and production of nitric oxide (NO) by macrophages, thus limiting the infection and concurrently orchestrating the subsequent adaptive immune response. Recently, a number of reports have shown that dysfunction or abnormal expression of ficolins may play crucial roles in viral and bacterial diseases and in inflammation. This review summarizes the reports on the roles of ficolins in the infectious diseases, and provides insight into ficolins as novel innate immune therapeutic options to treat these diseases.
Collapse
Affiliation(s)
- Yushan Ren
- State Key Laboratory of Virology and Department of Immunology and Hubei Province Key Laboratory of Allergy and Immunology, Wuhan University School of Medicine, Wuhan, 430071 China
| | - Quanquan Ding
- State Key Laboratory of Virology and Department of Immunology and Hubei Province Key Laboratory of Allergy and Immunology, Wuhan University School of Medicine, Wuhan, 430071 China
| | - Xiaolian Zhang
- State Key Laboratory of Virology and Department of Immunology and Hubei Province Key Laboratory of Allergy and Immunology, Wuhan University School of Medicine, Wuhan, 430071 China
| |
Collapse
|
12
|
Verma A, White M, Vathipadiekal V, Tripathi S, Mbianda J, Ieong M, Qi L, Taubenberger JK, Takahashi K, Jensenius JC, Thiel S, Hartshorn KL. Human H-ficolin inhibits replication of seasonal and pandemic influenza A viruses. J Immunol 2012; 189:2478-87. [PMID: 22851708 DOI: 10.4049/jimmunol.1103786] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The collectins have been shown to have a role in host defense against influenza A virus (IAV) and other significant viral pathogens (e.g., HIV). The ficolins are a related group of innate immune proteins that are present at relatively high concentrations in serum, but also in respiratory secretions; however, there has been little study of the role of ficolins in viral infection. In this study, we demonstrate that purified recombinant human H-ficolin and H-ficolin in human serum and bronchoalveolar lavage fluid bind to IAV and inhibit viral infectivity and hemagglutination activity in vitro. Removal of ficolins from human serum or bronchoalveolar lavage fluid reduces their antiviral activity. Inhibition of IAV did not involve the calcium-dependent lectin activity of H-ficolin. We demonstrate that H-ficolin is sialylated and that removal of sialic acid abrogates IAV inhibition, while addition of the neuraminidase inhibitor oseltamivir potentiates neutralization, hemagglutinin inhibition, and viral aggregation caused by H-ficolin. Pandemic and mouse-adapted strains of IAV are generally not inhibited by the collectins surfactant protein D or mannose binding lectin because of a paucity of glycan attachments on the hemagglutinin of these strains. In contrast, H-ficolin inhibited both the mouse-adapted PR-8 H1N1 strain and a pandemic H1N1 strain from 2009. H-ficolin also fixed complement to a surface coated with IAV. These findings suggest that H-ficolin contributes to host defense against IAV.
Collapse
Affiliation(s)
- Anamika Verma
- Department of Medicine, Boston University School of Medicine, Boston, MA 02118, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Sang Y, Rowland RR, Blecha F. Interaction between innate immunity and porcine reproductive and respiratory syndrome virus. Anim Health Res Rev 2011; 12:149-67. [PMID: 22152291 DOI: 10.1017/S1466252311000144] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Innate immunity provides frontline antiviral protection and bridges adaptive immunity against virus infections. However, viruses can evade innate immune surveillance potentially causing chronic infections that may lead to pandemic diseases. Porcine reproductive and respiratory syndrome virus (PRRSV) is an example of an animal virus that has developed diverse mechanisms to evade porcine antiviral immune responses. Two decades after its discovery, PRRSV is still one of the most globally devastating viruses threatening the swine industry. In this review, we discuss the molecular and cellular composition of the mammalian innate antiviral immune system with emphasis on the porcine system. In particular, we focus on the interaction between PRRSV and porcine innate immunity at cellular and molecular levels. Strategies for targeting innate immune components and other host metabolic factors to induce ideal anti-PRRSV protection are also discussed.
Collapse
|
14
|
Abstract
Human L-ficolin (P35, ficolin-2) is synthesised in the liver and secreted into the bloodstream where it is one of the major pattern recognition molecules of plasma/serum. Like other ficolins, it consists of a collagen-like tail region linked to a fibrinogen-related globular head; a basic triplet subunit arises via a collagen-like triple helix, and this then forms higher multimers (typically a 12-mer, Mr 400K). Unlike other ficolins, it has a complex set of binding sites arranged within an internal cleft enabling it to recognise a variety of molecular patterns including acetylated sugars and certain 1,3-β-glucans. It is one of the few molecules known to activate the lectin pathway of complement. Recently, some disease association studies (at either the DNA or protein level) have implicated L-ficolin in innate immunity, where it might cooperate with pentraxins and collectins. Emerging lines of evidence point to a role for L-ficolin in respiratory immunity, where its affinity for Pseudomonas aeruginosa could be significant.
Collapse
Affiliation(s)
- David C Kilpatrick
- Scottish National Blood Transfusion Service, National Science Laboratory, Edinburgh, UK.
| | | |
Collapse
|
15
|
Tarr AW, Urbanowicz RA, Ball JK. The role of humoral innate immunity in hepatitis C virus infection. Viruses 2012; 4:1-27. [PMID: 22355450 PMCID: PMC3280516 DOI: 10.3390/v4010001] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Revised: 12/21/2011] [Accepted: 12/23/2011] [Indexed: 12/19/2022] Open
Abstract
Infection with Hepatitis C Virus (HCV) causes chronic disease in approximately 80% of cases, resulting in chronic inflammation and cirrhosis. Current treatments are not completely effective, and a vaccine has yet to be developed. Spontaneous resolution of infection is associated with effective host adaptive immunity to HCV, including production of both HCV-specific T cells and neutralizing antibodies. However, the supporting role of soluble innate factors in protection against HCV is less well understood. The innate immune system provides an immediate line of defense against infections, triggering inflammation and playing a critical role in activating adaptive immunity. Innate immunity comprises both cellular and humoral components, the humoral arm consisting of pattern recognition molecules such as complement C1q, collectins and ficolins. These molecules activate the complement cascade, neutralize pathogens, and recruit antigen presenting cells. Here we review the current understanding of anti-viral components of the humoral innate immune system that play a similar role to antibodies, describing their role in immunity to HCV and their potential contribution to HCV pathogenesis.
Collapse
Affiliation(s)
- Alexander W. Tarr
- Biomedical Research Unit in Gastroenterology, School of Molecular Medical Sciences, Faculty of Medicine and Health Sciences, University of Nottingham, Nottingham, NG7 2UH, UK; (R.A.U.); (J.K.B.)
| | | | | |
Collapse
|
16
|
Keirstead ND, Hayes MA, Vandervoort GE, Brooks AS, Squires EJ, Lillie BN. Single nucleotide polymorphisms in collagenous lectins and other innate immune genes in pigs with common infectious diseases. Vet Immunol Immunopathol 2011; 142:1-13. [PMID: 21570129 DOI: 10.1016/j.vetimm.2011.02.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Revised: 02/15/2011] [Accepted: 02/18/2011] [Indexed: 02/06/2023]
Abstract
Innate immune recognition of pathogens involves various surface receptors and soluble proteins that precede agglutination, complement activation, phagocytosis, and the adaptive immune response. Mannan-binding lectins (MBLs), ficolins (FCNs) and surfactant protein A (SP-A) are soluble collagenous lectins that bind surface structures of various bacteria, viruses and fungi. Some single nucleotide polymorphisms (SNPs) in collagenous lectin genes of humans and other species, including pigs, have been implicated in variation in susceptibility to infectious and inflammatory diseases. In this study we determined the frequencies of 13 SNP alleles of MBL-A, MBL-C, ficolin-α, ficolin-β, and SP-A in 1324 healthy pigs and 461 pigs diagnosed with common infectious diseases at necropsy. For comparison, we also analyzed 12 other SNP alleles in several other innate immune genes, including galectins and TLRs. Several SNPs within genes encoding porcine MBL-A, MBL-C and SP-A were more frequent in pigs diagnosed at necropsy with various diseases or pathogens. These findings suggest that several collagenous lectin SNPs are associated with disease susceptibility and therefore might be genetic markers of impaired innate immune function.
Collapse
Affiliation(s)
- N D Keirstead
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | | | | | | | | | | |
Collapse
|