1
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Riccio S, Childs K, Jackson B, Graham SP, Seago J. The Identification of Host Proteins That Interact with Non-Structural Proteins-1α and -1β of Porcine Reproductive and Respiratory Syndrome Virus-1. Viruses 2023; 15:2445. [PMID: 38140685 PMCID: PMC10747794 DOI: 10.3390/v15122445] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/12/2023] [Accepted: 12/14/2023] [Indexed: 12/24/2023] Open
Abstract
Porcine reproductive and respiratory syndrome viruses (PRRSV-1 and -2) are the causative agents of one of the most important infectious diseases affecting the global pig industry. Previous studies, largely focused on PRRSV-2, have shown that non-structural protein-1α (NSP1α) and NSP1β modulate host cell responses; however, the underlying molecular mechanisms remain to be fully elucidated. Therefore, we aimed to identify novel PRRSV-1 NSP1-host protein interactions to improve our knowledge of NSP1-mediated immunomodulation. NSP1α and NSP1β from a representative western European PRRSV-1 subtype 1 field strain (215-06) were used to screen a cDNA library generated from porcine alveolar macrophages (PAMs), the primary target cell of PRRSV, using the yeast-2-hybrid system. This identified 60 putative binding partners for NSP1α and 115 putative binding partners for NSP1β. Of those taken forward for further investigation, 3 interactions with NSP1α and 27 with NSP1β were confirmed. These proteins are involved in the immune response, ubiquitination, nuclear transport, or protein expression. Increasing the stringency of the system revealed NSP1α interacts more strongly with PIAS1 than PIAS2, whereas NSP1β interacts more weakly with TAB3 and CPSF4. Our study has increased our knowledge of the PRRSV-1 NSP1α and NSP1β interactomes, further investigation of which could provide detailed insight into PRRSV immunomodulation and aid vaccine development.
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Affiliation(s)
- Sofia Riccio
- The Pirbright Institute, Ash Road, Pirbright, Woking GU24 0NF, UK; (S.R.); (K.C.); (B.J.); (S.P.G.)
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, 146 Brownlow Hill, Liverpool L3 5RF, UK
| | - Kay Childs
- The Pirbright Institute, Ash Road, Pirbright, Woking GU24 0NF, UK; (S.R.); (K.C.); (B.J.); (S.P.G.)
| | - Ben Jackson
- The Pirbright Institute, Ash Road, Pirbright, Woking GU24 0NF, UK; (S.R.); (K.C.); (B.J.); (S.P.G.)
| | - Simon P. Graham
- The Pirbright Institute, Ash Road, Pirbright, Woking GU24 0NF, UK; (S.R.); (K.C.); (B.J.); (S.P.G.)
| | - Julian Seago
- The Pirbright Institute, Ash Road, Pirbright, Woking GU24 0NF, UK; (S.R.); (K.C.); (B.J.); (S.P.G.)
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2
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Noble A, Paudyal B, Schwartz JC, Mwangi W, Munir D, Tchilian E, Hammond JA, Graham SP. Distinct effector functions mediated by Fc regions of bovine IgG subclasses and their interaction with Fc gamma receptors. Front Immunol 2023; 14:1286903. [PMID: 38077405 PMCID: PMC10702552 DOI: 10.3389/fimmu.2023.1286903] [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] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 11/07/2023] [Indexed: 12/18/2023] Open
Abstract
Cattle possess three IgG subclasses. However, the key immune functions, including complement and NK cell activation, and enhancement of phagocytosis, are not fully described for bovine IgG1, 2 and 3. We produced chimeric monoclonal antibodies (mAbs) consisting of a defined variable region linked to the constant regions of bovine IgG1, 2 and 3, and expressed His-tagged soluble recombinant bovine Fc gamma receptors (FcγRs) IA (CD64), IIA (CD32A), III (CD16) and Fcγ2R. Functional assays using bovinized mAbs were developed. IgG1 and IgG3, but not IgG2, activated complement-dependent cytotoxicity. Only IgG1 could activate cattle NK cells to mobilize CD107a after antigen crosslinking, a surrogate assay for antibody-dependent cell cytotoxicity. Both IgG1 and IgG2 could trigger monocyte-derived macrophages to phagocytose fluorescently labelled antigen-expressing target cells. IgG3 induced only weak antibody-dependent cellular phagocytosis (ADCP). By contrast, monocytes only exhibited strong ADCP when triggered by IgG2. IgG1 bound most strongly to recombinant FcγRs IA, IIA and III, with weaker binding by IgG3 and none by IgG2, which bound exclusively to Fcγ2R. Immune complexes containing IgG1, 2 and 3 bound differentially to leukocyte subsets, with IgG2 binding strongly to neutrophils and monocytes and all subclasses binding platelets. Differential expression of the FcγRs on leukocyte subsets was demonstrated by surface staining and/or RT-qPCR of sorted cells, e.g., Fcγ2R mRNA was expressed in monocytes/macrophages, neutrophils, and platelets, potentially explaining their strong interactions with IgG2, and FcγRIII was expressed on NK cells, presumably mediating IgG1-dependent NK cell activation. These data reveal differences in bovine IgG subclass functionality, which do not correspond to those described in humans, mice or pigs, which is relevant to the study of these IgG subclasses in vaccine and therapeutic antibody development.
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3
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Luo K, Li Y, Liu T, Zhuge X, Chung E, Timms AR, Graham SP, Ren G. Functionalized Copper Nanoparticles with Gold Nanoclusters: Part I. Highly Selective Electrosynthesis of Hydrogen Peroxide. ACS Omega 2023; 8:36171-36178. [PMID: 37810692 PMCID: PMC10552511 DOI: 10.1021/acsomega.3c03665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 08/30/2023] [Indexed: 10/10/2023]
Abstract
Copper nanoparticles (CuNPs) and gold nanoclusters (AuNCs) show a high catalytic performance in generating hydrogen peroxide (H2O2), a property that can be exploited to kill disease-causing microbes and to carry carbon-free energy. Some combinations of NPs/NCs can generate synergistic effects to produce stronger antiseptics, such as H2O2 or other reactive oxygen species (ROS). Herein, we demonstrate a novel facile AuNC surface decoration method on the surfaces of CuNPs using galvanic displacement. The Cu-Au bimetallic NPs presented a high selective production of H2O2 via a two-electron (2e-) oxygen reduction reaction (ORR). Their physicochemical analyses were conducted by scanning electron microscopy (SEM), transmitting electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). With the optimized Cu-Au1.5NPs showing their particle sizes averaged in 53.8 nm, their electrochemical analysis indicated that the pristine AuNC structure exhibited the highest 2e- selectivity in ORR, the CuNPs presented the weakest 2e- selectivity, and the optimized Cu-Au1.5NPs exhibited a high 2e- selectivity of 95% for H2O2 production, along with excellent catalytic activity and durability. The optimized Cu-Au1.5NPs demonstrated a novel pathway to balance the cost and catalytic performance through the appropriate combination of metal NPs/NCs.
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Affiliation(s)
- Kun Luo
- School
of Materials Science and Engineering, Changzhou
University, Changzhou 213164, P. R. China
| | - Ya Li
- School
of Materials Science and Engineering, Changzhou
University, Changzhou 213164, P. R. China
| | - Tong Liu
- School
of Materials Science and Engineering, Changzhou
University, Changzhou 213164, P. R. China
| | - Xiangqun Zhuge
- School
of Materials Science and Engineering, Changzhou
University, Changzhou 213164, P. R. China
| | - Etelka Chung
- University
of Hertfordshire, Hatfield, Hertfordshire AL10 9AB, U.K.
| | - Andrew R. Timms
- University
of Hertfordshire, Hatfield, Hertfordshire AL10 9AB, U.K.
| | - Simon P. Graham
- The
Pirbright Institute, Ash Road, Pirbright, Woking GU24 0NF, U.K.
| | - Guogang Ren
- University
of Hertfordshire, Hatfield, Hertfordshire AL10 9AB, U.K.
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4
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de Brito RCF, Holtham K, Roser J, Saunders JE, Wezel Y, Henderson S, Mauch T, Sanz-Bernardo B, Frossard JP, Bernard M, Lean FZX, Nunez A, Gubbins S, Suárez NM, Davison AJ, Francis MJ, Huether M, Benchaoui H, Salt J, Fowler VL, Jarvis MA, Graham SP. An attenuated herpesvirus vectored vaccine candidate induces T-cell responses against highly conserved porcine reproductive and respiratory syndrome virus M and NSP5 proteins that are unable to control infection. Front Immunol 2023; 14:1201973. [PMID: 37600784 PMCID: PMC10436000 DOI: 10.3389/fimmu.2023.1201973] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 07/14/2023] [Indexed: 08/22/2023] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) remains a leading cause of economic loss in pig farming worldwide. Existing commercial vaccines, all based on modified live or inactivated PRRSV, fail to provide effective immunity against the highly diverse circulating strains of both PRRSV-1 and PRRSV-2. Therefore, there is an urgent need to develop more effective and broadly active PRRSV vaccines. In the absence of neutralizing antibodies, T cells are thought to play a central role in controlling PRRSV infection. Herpesvirus-based vectors are novel vaccine platforms capable of inducing high levels of T cells against encoded heterologous antigens. Therefore, the aim of this study was to assess the immunogenicity and efficacy of an attenuated herpesvirus-based vector (bovine herpesvirus-4; BoHV-4) expressing a fusion protein comprising two well-characterized PRRSV-1 T-cell antigens (M and NSP5). Prime-boost immunization of pigs with BoHV-4 expressing the M and NSP5 fusion protein (vector designated BoHV-4-M-NSP5) induced strong IFN-γ responses, as assessed by ELISpot assays of peripheral blood mononuclear cells (PBMC) stimulated with a pool of peptides representing PRRSV-1 M and NSP5. The responses were closely mirrored by spontaneous IFN-γ release from unstimulated cells, albeit at lower levels. A lower frequency of M and NSP5 specific IFN-γ responding cells was induced following a single dose of BoHV-4-M-NSP5 vector. Restimulation using M and NSP5 peptides from PRRSV-2 demonstrated a high level of cross-reactivity. Vaccination with BoHV-4-M-NSP5 did not affect viral loads in either the blood or lungs following challenge with the two heterologous PRRSV-1 strains. However, the BoHV-4-M-NSP5 prime-boost vaccination showed a marked trend toward reduced lung pathology following PRRSV-1 challenge. The limited effect of T cells on PRRSV-1 viral load was further examined by analyzing local and circulating T-cell responses using intracellular cytokine staining and proliferation assays. The results from this study suggest that vaccine-primed T-cell responses may have helped in the control of PRRSV-1 associated tissue damage, but had a minimal, if any, effect on controlling PRRSV-1 viral loads. Together, these results indicate that future efforts to develop effective PRRSV vaccines should focus on achieving a balanced T-cell and antibody response.
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Affiliation(s)
| | | | | | - Jack E. Saunders
- The Pirbright Institute, Woking, United Kingdom
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
| | - Yvonne Wezel
- The Vaccine Group Ltd., Plymouth, United Kingdom
| | | | - Thekla Mauch
- The Vaccine Group Ltd., Plymouth, United Kingdom
| | | | | | - Matthieu Bernard
- Pathology and Animal Sciences Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Fabian Z. X. Lean
- Pathology and Animal Sciences Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Alejandro Nunez
- Pathology and Animal Sciences Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | | | - Nicolás M. Suárez
- MRC-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
| | - Andrew J. Davison
- MRC-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
| | | | | | | | - Jeremy Salt
- The Vaccine Group Ltd., Plymouth, United Kingdom
| | | | - Michael A. Jarvis
- The Vaccine Group Ltd., Plymouth, United Kingdom
- School of Biomedical Sciences, University of Plymouth, Plymouth, United Kingdom
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5
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Chrun T, Maze EA, Roper KJ, Vatzia E, Paudyal B, McNee A, Martini V, Manjegowda T, Freimanis G, Silesian A, Polo N, Clark B, Besell E, Booth G, Carr BV, Edmans M, Nunez A, Koonpaew S, Wanasen N, Graham SP, Tchilian E. Simultaneous co-infection with swine influenza A and porcine reproductive and respiratory syndrome viruses potentiates adaptive immune responses. Front Immunol 2023; 14:1192604. [PMID: 37287962 PMCID: PMC10242126 DOI: 10.3389/fimmu.2023.1192604] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 05/09/2023] [Indexed: 06/09/2023] Open
Abstract
Porcine respiratory disease is multifactorial and most commonly involves pathogen co-infections. Major contributors include swine influenza A (swIAV) and porcine reproductive and respiratory syndrome (PRRSV) viruses. Experimental co-infection studies with these two viruses have shown that clinical outcomes can be exacerbated, but how innate and adaptive immune responses contribute to pathogenesis and pathogen control has not been thoroughly evaluated. We investigated immune responses following experimental simultaneous co-infection of pigs with swIAV H3N2 and PRRSV-2. Our results indicated that clinical disease was not significantly exacerbated, and swIAV H3N2 viral load was reduced in the lung of the co-infected animals. PRRSV-2/swIAV H3N2 co-infection did not impair the development of virus-specific adaptive immune responses. swIAV H3N2-specific IgG serum titers and PRRSV-2-specific CD8β+ T-cell responses in blood were enhanced. Higher proportions of polyfunctional CD8β+ T-cell subset in both blood and lung washes were found in PRRSV-2/swIAV H3N2 co-infected animals compared to the single-infected groups. Our findings provide evidence that systemic and local host immune responses are not negatively affected by simultaneous swIAV H3N2/PRRSV-2 co-infection, raising questions as to the mechanisms involved in disease modulation.
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Affiliation(s)
| | | | | | | | | | - Adam McNee
- The Pirbright Institute, Woking, United Kingdom
| | | | | | | | | | - Noemi Polo
- The Pirbright Institute, Woking, United Kingdom
| | - Becky Clark
- The Pirbright Institute, Woking, United Kingdom
| | | | | | | | | | - Alejandro Nunez
- Pathology and Animal Sciences, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Surapong Koonpaew
- Virology and Cell Technology Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Pathumthani, Thailand
| | - Nanchaya Wanasen
- Virology and Cell Technology Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Pathumthani, Thailand
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6
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Hayhurst E, Rose E, Pedrera M, Edwards JC, Kotynska N, Grainger D, Sadigh Y, Flannery J, Bonnet L, Ritwik R, Dulal P, Howard MK, Graham SP. Evaluation of the Delivery of a Live Attenuated Porcine Reproductive and Respiratory Syndrome Virus as a Unit Solid Dose Injectable Vaccine. Vaccines (Basel) 2022; 10:vaccines10111836. [PMID: 36366345 PMCID: PMC9696641 DOI: 10.3390/vaccines10111836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 10/25/2022] [Accepted: 10/28/2022] [Indexed: 12/01/2022] Open
Abstract
Solid dose vaccine formulation and delivery systems offer potential advantages over traditional liquid vaccine formulations. In addition to enhanced thermostability, needle-free delivery of unit solid dose injectable (USDI) vaccines offers safe, rapid, and error-free administration, with applicability to both human and animal health. Solid dose formulation technologies can be adapted for delivery of different vaccine formats including live attenuated vaccines, which remain the ‘gold standard’ for many disease targets. Porcine reproductive and respiratory syndrome viruses (PRRSV) cause one of the most economically important diseases affecting the global pig industry. Despite several shortcomings, live attenuated vaccines are widely used to control PRRSV. We optimised a freeze-dried USDI formulation of live attenuated PRRSV-1, which fully retained infectious titre, and evaluated its immunogenicity in comparison to virus delivered in liquid suspension via intramuscular and subcutaneous needle inoculation. Pigs vaccinated with the USDI formulation displayed vaccine viraemia, and PRRSV-specific antibody and T cell responses comparable to animals immunised with the liquid vaccine. The USDI vaccine formulation was stable for at least 6 months when stored refrigerated. These data demonstrate the potential for a solid dose vaccine delivery system as an alternative to conventional needle-syringe delivery of live attenuated PRRSV vaccines.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Pawan Dulal
- Enesi Pharma, Abingdon OX14 4SA, UK
- Correspondence: (P.D.); (S.P.G.)
| | | | - Simon P. Graham
- The Pirbright Institute, Pirbright GU24 0NF, UK
- Correspondence: (P.D.); (S.P.G.)
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7
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Goatley LC, Nash RH, Andrews C, Hargreaves Z, Tng P, Reis AL, Graham SP, Netherton CL. Cellular and Humoral Immune Responses after Immunisation with Low Virulent African Swine Fever Virus in the Large White Inbred Babraham Line and Outbred Domestic Pigs. Viruses 2022; 14:v14071487. [PMID: 35891467 PMCID: PMC9322176 DOI: 10.3390/v14071487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 06/24/2022] [Accepted: 07/03/2022] [Indexed: 12/15/2022] Open
Abstract
African swine fever virus is currently present in all of the world’s continents apart from Antarctica, and efforts to control the disease are hampered by the lack of a commercially available vaccine. The Babraham large white pig is a highly inbred line that could represent a powerful tool to improve our understanding of the protective immune responses to this complex pathogen; however, previous studies indicated differential vaccine responses after the African swine fever virus challenge of inbred minipigs with different swine leukocyte antigen haplotypes. Lymphocyte numbers and African swine fever virus-specific antibody and T-cell responses were measured in inbred and outbred animals after inoculation with a low virulent African swine fever virus isolate and subsequent challenge with a related virulent virus. Surprisingly, diminished immune responses were observed in the Babraham pigs when compared to the outbred animals, and the inbred pigs were not protected after challenge. Recovery of Babraham pigs after challenge weakly correlated with antibody responses, whereas protective responses in outbred animals more closely correlated with the T-cell response. The Babraham pig may, therefore, represent a useful model for studying the role of antibodies in protection against the African swine fever virus.
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8
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El Sharif HF, Dennison SR, Tully M, Crossley S, Mwangi W, Bailey D, Graham SP, Reddy SM. Evaluation of electropolymerized molecularly imprinted polymers (E-MIPs) on disposable electrodes for detection of SARS-CoV-2 in saliva. Anal Chim Acta 2022; 1206:339777. [PMID: 35473858 PMCID: PMC8974637 DOI: 10.1016/j.aca.2022.339777] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [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: 01/21/2022] [Revised: 03/18/2022] [Accepted: 03/25/2022] [Indexed: 02/07/2023]
Abstract
We investigate electropolymerized molecularly imprinted polymers (E-MIPs) for the selective recognition of SARS-CoV-2 whole virus. E-MIPs imprinted with SARS-CoV-2 pseudoparticles (pps) were electrochemically deposited onto screen printed electrodes by reductive electropolymerization, using the water-soluble N-hydroxmethylacrylamide (NHMA) as functional monomer and crosslinked with N,N'-methylenebisacrylamide (MBAm). E-MIPs for SARS-CoV-2 showed selectivity for template SARS-CoV-2 pps, with an imprinting factor of 3:1, and specificity (significance = 0.06) when cross-reacted with other respiratory viruses. E-MIPs detected the presence of SARS-CoV-2 pps in <10 min with a limit of detection of 4.9 log10 pfu/mL, suggesting their suitability for detection of SARS-CoV-2 with minimal sample preparation. Using electrochemical impedance spectroscopy (EIS) and principal component analysis (PCA), the capture of SARS-CoV-2 from real patient saliva samples was also evaluated. Fifteen confirmed COVID-19 positive and nine COVID-19 negative saliva samples were compared against the established loop-mediated isothermal nucleic acid amplification (LAMP) technique used by the UK National Health Service. EIS data demonstrated a PCA discrimination between positive and negative LAMP samples. A threshold real impedance signal (ZRe) ≫ 4000 Ω and a corresponding charge transfer resistance (RCT) ≫ 6000 Ω was indicative of absence of virus (COVID-19 negative) in agreement with values obtained for our control non-imprinted polymer control. A ZRe at or below a threshold value of 600 Ω with a corresponding RCT of <1200 Ω was indicative of a COVID-19 positive sample. The presence of virus was confirmed by treatment of E-MIPs with a SARS-CoV-2 specific monoclonal antibody.
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Affiliation(s)
- H F El Sharif
- Department of Chemistry, UCLan Centre for Smart Materials, School of Natural Sciences, University of Central Lancashire, Preston, PR1 2HE, United Kingdom
| | - S R Dennison
- School of Pharmacy and Biomedical Sciences, University of Central Lancashire, Preston, PR1 2HE, United Kingdom
| | - M Tully
- The Pirbright Institute, Pirbright, Woking, Surrey, GU24 0NF, United Kingdom
| | - S Crossley
- The Pirbright Institute, Pirbright, Woking, Surrey, GU24 0NF, United Kingdom
| | - W Mwangi
- The Pirbright Institute, Pirbright, Woking, Surrey, GU24 0NF, United Kingdom
| | - D Bailey
- The Pirbright Institute, Pirbright, Woking, Surrey, GU24 0NF, United Kingdom
| | - S P Graham
- The Pirbright Institute, Pirbright, Woking, Surrey, GU24 0NF, United Kingdom
| | - S M Reddy
- Department of Chemistry, UCLan Centre for Smart Materials, School of Natural Sciences, University of Central Lancashire, Preston, PR1 2HE, United Kingdom.
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9
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McLean RK, Graham SP. The pig as an amplifying host for new and emerging zoonotic viruses. One Health 2022; 14:100384. [PMID: 35392655 PMCID: PMC8975596 DOI: 10.1016/j.onehlt.2022.100384] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 03/28/2022] [Accepted: 03/29/2022] [Indexed: 12/23/2022] Open
Abstract
Pig production is a rapidly growing segment of the global livestock sector, especially in Asia and Africa. Expansion and intensification of pig production has resulted in significant changes to traditional pig husbandry practices leading to an environment conducive to increased emergence and spread of infectious diseases. These include a number of zoonotic viruses including influenza, Japanese encephalitis, Nipah and coronaviruses. Pigs are known to independently facilitate the creation of novel reassortant influenza A virus strains, capable of causing pandemics. Moreover, pigs play a role in the amplification of Japanese encephalitis virus, transmitted by mosquito vectors found in areas inhabited by over half the world's human population. Furthermore, pigs acted as an amplifying host in the first and still most severe outbreak of Nipah virus in Malaysia, that necessitated the culling over 1 million pigs. Finally, novel porcine coronaviruses are being discovered in high pig-density countries which have pandemic potential. In this review, we discuss the role that pigs play as intermediate/amplifying hosts for zoonotic viruses with pandemic potential and consider how multivalent vaccination of pigs could in turn safeguard human health.
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10
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Fay PC, Wijesiriwardana N, Munyanduki H, Sanz-Bernardo B, Lewis I, Haga IR, Moffat K, van Vliet AHM, Hope J, Graham SP, Beard PM. The immune response to lumpy skin disease virus in cattle is influenced by inoculation route. Front Immunol 2022; 13:1051008. [PMID: 36518761 PMCID: PMC9742517 DOI: 10.3389/fimmu.2022.1051008] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 10/31/2022] [Indexed: 11/29/2022] Open
Abstract
Lumpy skin disease virus (LSDV) causes severe disease in cattle and water buffalo and is transmitted by hematophagous arthropod vectors. Detailed information of the adaptive and innate immune response to LSDV is limited, hampering the development of tools to control the disease. This study provides an in-depth analysis of the immune responses of calves experimentally inoculated with LSDV via either needle-inoculation or arthropod-inoculation using virus-positive Stomoxys calcitrans and Aedes aegypti vectors. Seven out of seventeen needle-inoculated calves (41%) developed clinical disease characterised by multifocal necrotic cutaneous nodules. In comparison 8/10 (80%) of the arthropod-inoculated calves developed clinical disease. A variable LSDV-specific IFN-γ immune response was detected in the needle-inoculated calves from 5 days post inoculation (dpi) onwards, with no difference between clinical calves (developed cutaneous lesions) and nonclinical calves (did not develop cutaneous lesions). In contrast a robust and uniform cell-mediated immune response was detected in all eight clinical arthropod-inoculated calves, with little response detected in the two nonclinical arthropod-inoculated calves. Neutralising antibodies against LSDV were detected in all inoculated cattle from 5-7 dpi. Comparison of the production of anti-LSDV IgM and IgG antibodies revealed no difference between clinical and nonclinical needle-inoculated calves, however a strong IgM response was evident in the nonclinical arthropod-inoculated calves but absent in the clinical arthropod-inoculated calves. This suggests that early IgM production is a correlate of protection in LSD. This study presents the first evidence of differences in the immune response between clinical and nonclinical cattle and highlights the importance of using a relevant transmission model when studying LSD.
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Affiliation(s)
- Petra C Fay
- The Pirbright Institute, Pirbright, United Kingdom
| | - Najith Wijesiriwardana
- The Pirbright Institute, Pirbright, United Kingdom.,School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom
| | | | | | - Isabel Lewis
- The Pirbright Institute, Pirbright, United Kingdom
| | - Ismar R Haga
- The Pirbright Institute, Pirbright, United Kingdom
| | - Katy Moffat
- The Pirbright Institute, Pirbright, United Kingdom
| | | | - Jayne Hope
- The Roslin Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Simon P Graham
- The Pirbright Institute, Pirbright, United Kingdom.,School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom
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11
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Paudyal B, Mwangi W, Rijal P, Schwartz JC, Noble A, Shaw A, Sealy JE, Bonnet-Di Placido M, Graham SP, Townsend A, Hammond JA, Tchilian E. Fc-Mediated Functions of Porcine IgG Subclasses. Front Immunol 2022; 13:903755. [PMID: 35757698 PMCID: PMC9218351 DOI: 10.3389/fimmu.2022.903755] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [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: 03/24/2022] [Accepted: 04/29/2022] [Indexed: 11/13/2022] Open
Abstract
The pig is an important agricultural species and powerful biomedical model. We have established the pig, a large natural host animal for influenza with many physiological similarities to humans, as a robust model for testing the therapeutic potential of monoclonal antibodies. Antibodies provide protection through neutralization and recruitment of innate effector functions through the Fc domain. However very little is known about the Fc-mediated functions of porcine IgG subclasses. We have generated 8 subclasses of two porcine monoclonal anti influenza hemagglutinin antibodies. We characterized their ability to activate complement, trigger cytotoxicity and phagocytosis by immune cells and assayed their binding to monocytes, macrophages, and natural killer cells. We show that IgG1, IgG2a, IgG2b, IgG2c and IgG4 bind well to targeted cell types and mediate complement mediated cellular cytotoxicity (CDCC), antibody dependent cellular cytotoxicity (ADCC) and antibody mediated cell phagocytosis (ADCP). IgG5b and IgG5c exhibited weak binding and variable and poor functional activity. Immune complexes of porcine IgG3 did not show any Fc-mediated functions except for binding to monocytes and macrophages and weak binding to NK cells. Interestingly, functionally similar porcine IgG subclasses clustered together in the genome. These novel findings will enhance the utility of the pig model for investigation of therapeutic antibodies.
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Affiliation(s)
- Basudev Paudyal
- Host Responses, The Pirbright Institute, Woking, United Kingdom
| | - William Mwangi
- Host Responses, The Pirbright Institute, Woking, United Kingdom
| | - Pramila Rijal
- Medical Research Council (MRC) Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - John C Schwartz
- Host Responses, The Pirbright Institute, Woking, United Kingdom
| | - Alistair Noble
- Host Responses, The Pirbright Institute, Woking, United Kingdom
| | - Andrew Shaw
- Host Responses, The Pirbright Institute, Woking, United Kingdom
| | - Joshua E Sealy
- Host Responses, The Pirbright Institute, Woking, United Kingdom
| | | | - Simon P Graham
- Host Responses, The Pirbright Institute, Woking, United Kingdom
| | - Alain Townsend
- Medical Research Council (MRC) Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - John A Hammond
- Host Responses, The Pirbright Institute, Woking, United Kingdom
| | - Elma Tchilian
- Host Responses, The Pirbright Institute, Woking, United Kingdom
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12
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Chrun T, Maze EA, Vatzia E, Martini V, Paudyal B, Edmans MD, McNee A, Manjegowda T, Salguero FJ, Wanasen N, Koonpaew S, Graham SP, Tchilian E. Simultaneous Infection With Porcine Reproductive and Respiratory Syndrome and Influenza Viruses Abrogates Clinical Protection Induced by Live Attenuated Porcine Reproductive and Respiratory Syndrome Vaccination. Front Immunol 2021; 12:758368. [PMID: 34858411 PMCID: PMC8632230 DOI: 10.3389/fimmu.2021.758368] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 10/21/2021] [Indexed: 11/30/2022] Open
Abstract
The porcine respiratory disease complex (PRDC) is responsible for significant economic losses in the pig industry worldwide. Porcine reproductive and respiratory syndrome virus (PRRSV) and swine influenza virus are major viral contributors to PRDC. Vaccines are cost-effective measures for controlling PRRS, however, their efficacy in the context of co-infections has been poorly investigated. In this study, we aimed to determine the effect of PRRSV-2 and swine influenza H3N2 virus co-infection on the efficacy of PRRSV modified live virus (MLV) vaccination, which is widely used in the field. Following simultaneous challenge with contemporary PRRSV-2 and H3N2 field isolates, we found that the protective effect of PRRS MLV vaccination on clinical disease and pathology was abrogated, although viral load was unaffected and antibody responses were enhanced. In contrast, co-infection in non-immunized animals reduced PRRSV-2 viremia and H3N2 virus load in the upper respiratory tract and potentiated T cell responses against both PRRSV-2 and H3N2 in the lung. Further analysis suggested that an upregulation of inhibitory cytokines gene expression in the lungs of vaccinated pigs may have influenced responses to H3N2 and PRRSV-2. These findings provide important insights into the effect of viral co-infections on PRRS vaccine efficacy that may help identify more effective vaccination strategies against PRDC in the field.
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Affiliation(s)
| | | | | | | | | | | | - Adam McNee
- The Pirbright Institute, Woking, United Kingdom
| | | | | | - Nanchaya Wanasen
- Virology and Cell Technology Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Pathumthani, Thailand
| | - Surapong Koonpaew
- Virology and Cell Technology Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Pathumthani, Thailand
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13
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Chrun T, Leng J, La Ragione RM, Graham SP, Tchilian E. Changes in the Nasal Microbiota of Pigs Following Single or Co-Infection with Porcine Reproductive and Respiratory Syndrome and Swine Influenza A Viruses. Pathogens 2021; 10:1225. [PMID: 34684174 PMCID: PMC8540314 DOI: 10.3390/pathogens10101225] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 09/16/2021] [Accepted: 09/16/2021] [Indexed: 01/04/2023] Open
Abstract
Host-microbiota interactions are important in shaping immune responses that have the potential to influence the outcome of pathogen infection. However, most studies have focused on the gut microbiota and its possible association with disease outcome, while the role of the nasal microbiota and respiratory pathogen infection has been less well studied. Here we examined changes in the composition of the nasal microbiota of pigs following experimental infection with porcine reproductive and respiratory syndrome virus 2 (PRRSV-2), swine influenza A H3N2 virus (H3N2) or both viruses. DNA extracted from nasal swabs were subjected to 16S rRNA sequencing to study the composition of the nasal microbiota. Bacterial richness fluctuated in all groups, with a slight reduction in pigs singly infected with PRRSV-2 and H3N2 during the first 5 days of infection compared to uninfected controls. In contrast, nasal bacterial richness remained relatively stable after PRRSV-2/H3N2 co-infection. PRRSV-2 and H3N2, alone or in combination differentially altered the abundance and distribution of bacterial families. Single and co-infection with PRRSV-2 or H3N2 was associated with the expansion of the Neisseriaceae family. A positive correlation between H3N2 viral load and the relative abundance of the Neisseriaceae was observed. However, further mechanistic studies are required to understand the significance of the changes in specific bacterial families following these viral infections.
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Affiliation(s)
- Tiphany Chrun
- The Pirbright Institute, Woking GU24 0NF, UK; (S.P.G.); (E.T.)
| | - Joy Leng
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK;
| | | | - Simon P. Graham
- The Pirbright Institute, Woking GU24 0NF, UK; (S.P.G.); (E.T.)
| | - Elma Tchilian
- The Pirbright Institute, Woking GU24 0NF, UK; (S.P.G.); (E.T.)
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14
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Graham SP, Cheong YK, Furniss S, Nixon E, Smith JA, Yang X, Fruengel R, Hussain S, Tchorzewska MA, La Ragione RM, Ren G. Antiviral Efficacy of Metal and Metal Oxide Nanoparticles against the Porcine Reproductive and Respiratory Syndrome Virus. Nanomaterials (Basel) 2021; 11:nano11082120. [PMID: 34443950 PMCID: PMC8398903 DOI: 10.3390/nano11082120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 08/15/2021] [Accepted: 08/16/2021] [Indexed: 11/16/2022]
Abstract
Porcine reproductive and respiratory syndrome viruses (PRRSV) are responsible for one of the most economically important diseases affecting the global pig industry. On-farm high-efficiency particulate air (HEPA) filtration systems can effectively reduce airborne transmission of PRRSV and the incidence of PRRS, but they are costly, and their adoption is limited. Therefore, there is a need for low-cost alternatives, such as antimicrobial filters impregnated with antiviral nanoparticles (AVNP). During the past 10 years, tailored intermetallic/multi-elemental AVNP compositions have demonstrated effective performance against human viruses. In this study, a panel of five AVNP was evaluated for viricidal activity against PRRSV. Three AVNP materials: AVNP2, copper nanoparticles (CuNP), and copper oxide nanoparticles (CuONP), were shown to exert a significant reduction (>99.99%) in virus titers at 1.0% (w/v) concentration. Among the three, CuNP was the most effective at lower concentrations. Further experiments revealed that AVNP generated significant reductions in viral titers within just 1.5 min. For an optimal reduction in viral titers, direct contact between viruses and AVNP was required. This was further explained by the inert nature of these AVNP, where only negligible leaching concentrations of Ag/Cu ions (0.06–4.06 ppm) were detected in AVNP supernatants. Real-time dynamic light scatting (DLS) and transmission electron microscopic (TEM) analyses suggested that the mono-dispersive hydrodynamic behavior of AVNPs may have enhanced their antiviral activity against PRRSV. Collectively, these data support the further evaluation of these AVNP as candidate nanoparticles for incorporation into antimicrobial air-filtration systems to reduce transmission of PRRSV and other airborne pathogens.
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Affiliation(s)
- Simon P. Graham
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
- The Pirbright Institute, Woking GU24 0NF, UK
- Correspondence: (S.P.G.); (G.R.); Tel.: +44-(0)1483-231-478 (S.P.G.); +44-(0)7940-767-589 (G.R.)
| | - Yuen-Ki Cheong
- School of Physics, Engineering and Computer Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK; (Y.-K.C.); (X.Y.)
| | - Summer Furniss
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Emma Nixon
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Joseph A. Smith
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Xiuyi Yang
- School of Physics, Engineering and Computer Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK; (Y.-K.C.); (X.Y.)
| | - Rieke Fruengel
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Sabha Hussain
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Monika A. Tchorzewska
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Roberto M. La Ragione
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Guogang Ren
- School of Physics, Engineering and Computer Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK; (Y.-K.C.); (X.Y.)
- Correspondence: (S.P.G.); (G.R.); Tel.: +44-(0)1483-231-478 (S.P.G.); +44-(0)7940-767-589 (G.R.)
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15
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Holzer B, Rijal P, McNee A, Paudyal B, Martini V, Clark B, Manjegowda T, Salguero FJ, Bessell E, Schwartz JC, Moffat K, Pedrera M, Graham SP, Noble A, Placido MBD, La Ragione RM, Mwangi W, Beverley P, McCauley JW, Daniels RS, Hammond JA, Townsend AR, Tchilian E. Correction: Protective porcine influenza virus-specific monoclonal antibodies recognize similar haemagglutinin epitopes as humans. PLoS Pathog 2021; 17:e1009815. [PMID: 34347851 PMCID: PMC8336845 DOI: 10.1371/journal.ppat.1009815] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
[This corrects the article DOI: 10.1371/journal.ppat.1009330.].
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16
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Young JE, Dvorak CMT, Graham SP, Murtaugh MP. Isolation of Porcine Reproductive and Respiratory Syndrome Virus GP5-Specific, Neutralizing Monoclonal Antibodies From Hyperimmune Sows. Front Immunol 2021; 12:638493. [PMID: 33692807 PMCID: PMC7937800 DOI: 10.3389/fimmu.2021.638493] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 12/06/2020] [Accepted: 01/11/2021] [Indexed: 01/10/2023] Open
Abstract
Porcine reproductive and respiratory syndrome (PRRS) is a devastating disease which impacts the pig industry worldwide. The disease is caused by PRRS viruses (PRRSV-1 and -2) which leads to abortions and other forms of reproductive failure in sows and severe respiratory disease in growing pigs. Current PRRSV vaccines provide limited protection; only providing complete protection against closely related strains. The development of improved PRRSV vaccines would benefit from an increased understanding of epitopes relevant to protection, including those recognized by antibodies which possess the ability to neutralize distantly related strains. In this work, a reverse vaccinology approach was taken; starting first with pigs known to have a broadly neutralizing antibody response and then investigating the responsible B cells/antibodies through the isolation of PRRSV neutralizing monoclonal antibodies (mAbs). PBMCs were harvested from pigs sequentially exposed to a modified-live PRRSV-2 vaccine as well as divergent PRRSV-2 field isolates. Memory B cells were immortalized and a total of 5 PRRSV-specific B-cell populations were isolated. All identified PRRSV-specific antibodies were found to be broadly binding to all PRRSV-2 isolates tested, but not PRRSV-1 isolates. Antibodies against GP5 protein, commonly thought to possess a dominant PRRSV neutralizing epitope, were found to be highly abundant, as four out of five B cells populations were GP5 specific. One of the GP5-specific mAbs was shown to be neutralizing but this was only observed against homologous and not heterologous PRRSV strains. Further investigation of these antibodies, and others, may lead to the elucidation of conserved neutralizing epitopes that can be exploited for improved vaccine design and lays the groundwork for the study of broadly neutralizing antibodies against other porcine pathogens.
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Affiliation(s)
- Jordan E Young
- College of Veterinary Medicine, University of Minnesota, St. Paul, MN, United States
| | - Cheryl M T Dvorak
- College of Veterinary Medicine, University of Minnesota, St. Paul, MN, United States
| | | | - Michael P Murtaugh
- College of Veterinary Medicine, University of Minnesota, St. Paul, MN, United States
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17
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Tan TK, Rijal P, Rahikainen R, Keeble AH, Schimanski L, Hussain S, Harvey R, Hayes JWP, Edwards JC, McLean RK, Martini V, Pedrera M, Thakur N, Conceicao C, Dietrich I, Shelton H, Ludi A, Wilsden G, Browning C, Zagrajek AK, Bialy D, Bhat S, Stevenson-Leggett P, Hollinghurst P, Tully M, Moffat K, Chiu C, Waters R, Gray A, Azhar M, Mioulet V, Newman J, Asfor AS, Burman A, Crossley S, Hammond JA, Tchilian E, Charleston B, Bailey D, Tuthill TJ, Graham SP, Duyvesteyn HME, Malinauskas T, Huo J, Tree JA, Buttigieg KR, Owens RJ, Carroll MW, Daniels RS, McCauley JW, Stuart DI, Huang KYA, Howarth M, Townsend AR. A COVID-19 vaccine candidate using SpyCatcher multimerization of the SARS-CoV-2 spike protein receptor-binding domain induces potent neutralising antibody responses. Nat Commun 2021; 12:542. [PMID: 33483491 PMCID: PMC7822889 DOI: 10.1038/s41467-020-20654-7] [Citation(s) in RCA: 163] [Impact Index Per Article: 54.3] [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: 08/31/2020] [Accepted: 12/10/2020] [Indexed: 12/18/2022] Open
Abstract
There is need for effective and affordable vaccines against SARS-CoV-2 to tackle the ongoing pandemic. In this study, we describe a protein nanoparticle vaccine against SARS-CoV-2. The vaccine is based on the display of coronavirus spike glycoprotein receptor-binding domain (RBD) on a synthetic virus-like particle (VLP) platform, SpyCatcher003-mi3, using SpyTag/SpyCatcher technology. Low doses of RBD-SpyVLP in a prime-boost regimen induce a strong neutralising antibody response in mice and pigs that is superior to convalescent human sera. We evaluate antibody quality using ACE2 blocking and neutralisation of cell infection by pseudovirus or wild-type SARS-CoV-2. Using competition assays with a monoclonal antibody panel, we show that RBD-SpyVLP induces a polyclonal antibody response that recognises key epitopes on the RBD, reducing the likelihood of selecting neutralisation-escape mutants. Moreover, RBD-SpyVLP is thermostable and can be lyophilised without losing immunogenicity, to facilitate global distribution and reduce cold-chain dependence. The data suggests that RBD-SpyVLP provides strong potential to address clinical and logistic challenges of the COVID-19 pandemic.
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Affiliation(s)
- Tiong Kit Tan
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, OX3 9DS, UK.
| | - Pramila Rijal
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, OX3 9DS, UK
- Centre for Translational Immunology, Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | - Rolle Rahikainen
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - Anthony H Keeble
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - Lisa Schimanski
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, OX3 9DS, UK
- Centre for Translational Immunology, Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | - Saira Hussain
- Worldwide Influenza Centre, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Ruth Harvey
- Worldwide Influenza Centre, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Jack W P Hayes
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Jane C Edwards
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | | | | | - Miriam Pedrera
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Nazia Thakur
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | | | | | - Holly Shelton
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Anna Ludi
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | | | - Clare Browning
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | | | - Dagmara Bialy
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Sushant Bhat
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | | | - Philippa Hollinghurst
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
- Department of Microbial Sciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, UK
| | - Matthew Tully
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Katy Moffat
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Chris Chiu
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Ryan Waters
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Ashley Gray
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Mehreen Azhar
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | | | - Joseph Newman
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Amin S Asfor
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Alison Burman
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | | | - John A Hammond
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Elma Tchilian
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | | | - Dalan Bailey
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | | | - Simon P Graham
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Helen M E Duyvesteyn
- Division of Structural Biology, Nuffield Department of Medicine, University of Oxford, The Wellcome Centre for Human Genetics, Headington, Oxford, UK
| | - Tomas Malinauskas
- Division of Structural Biology, Nuffield Department of Medicine, University of Oxford, The Wellcome Centre for Human Genetics, Headington, Oxford, UK
| | - Jiandong Huo
- Division of Structural Biology, Nuffield Department of Medicine, University of Oxford, The Wellcome Centre for Human Genetics, Headington, Oxford, UK
- Rutherford Appleton Laboratory, Protein Production UK, Research Complex at Harwell, and Rosalind Franklin Institute, Harwell, Didcot, OX11 0FA, UK
| | - Julia A Tree
- National Infection Service, Public Health England, Porton Down, Salisbury, SP4 0JG, UK
| | - Karen R Buttigieg
- National Infection Service, Public Health England, Porton Down, Salisbury, SP4 0JG, UK
| | - Raymond J Owens
- Division of Structural Biology, Nuffield Department of Medicine, University of Oxford, The Wellcome Centre for Human Genetics, Headington, Oxford, UK
- Rutherford Appleton Laboratory, Protein Production UK, Research Complex at Harwell, and Rosalind Franklin Institute, Harwell, Didcot, OX11 0FA, UK
| | - Miles W Carroll
- National Infection Service, Public Health England, Porton Down, Salisbury, SP4 0JG, UK
- Nuffield Department of Medicine, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
| | - Rodney S Daniels
- Worldwide Influenza Centre, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - John W McCauley
- Worldwide Influenza Centre, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - David I Stuart
- Centre for Translational Immunology, Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
- Division of Structural Biology, Nuffield Department of Medicine, University of Oxford, The Wellcome Centre for Human Genetics, Headington, Oxford, UK
- Diamond Light Source Ltd, Harwell Science & Innovation Campus, Didcot, UK
| | - Kuan-Ying A Huang
- Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Mark Howarth
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK.
| | - Alain R Townsend
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, OX3 9DS, UK.
- Centre for Translational Immunology, Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK.
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18
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Tugwell LA, England ME, Gubbins S, Sanders CJ, Stokes JE, Stoner J, Graham SP, Blackwell A, Darpel KE, Carpenter S. Thermal limits for flight activity of field-collected Culicoides in the United Kingdom defined under laboratory conditions. Parasit Vectors 2021; 14:55. [PMID: 33461612 PMCID: PMC7814454 DOI: 10.1186/s13071-020-04552-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 10/12/2020] [Accepted: 12/13/2020] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Culicoides biting midges (Diptera: Ceratopogonidae) are biological vectors of internationally important arboviruses and inflict biting nuisance on humans, companion animals and livestock. In temperate regions, transmission of arboviruses is limited by temperature thresholds, in both replication and dissemination of arboviruses within the vector and in the flight activity of adult Culicoides. This study aims to determine the cold-temperature thresholds for flight activity of Culicoides from the UK under laboratory conditions. METHODS Over 18,000 Culicoides adults were collected from the field using 4 W down-draught miniature ultraviolet Centers for Disease Control traps. Populations of Culicoides were sampled at three different geographical locations within the UK during the summer months and again in the autumn at one geographical location. Activity at constant temperatures was assessed using a bioassay that detected movement of adult Culicoides towards an ultraviolet light source over a 24-h period. RESULTS The proportion of active adult Culicoides increased with temperature but cold temperature thresholds for activity varied significantly according to collection season and location. Populations dominated by the subgenus Avaritia collected in South East England had a lower activity threshold temperature in the autumn (4 °C) compared with populations collected in the summer (10 °C). Within the subgenus Avaritia, Culicoides scoticus was significantly more active across all temperatures tested than Culicoides obsoletus within the experimental setup. Populations of Culicoides impunctatus collected in the North East of England were only active once temperatures reached 14 °C. Preliminary data suggested flight activity of the subgenus Avaritia does not differ between populations in South East England and those in the Scottish Borders. CONCLUSIONS These findings demonstrate seasonal changes in temperature thresholds for flight and across different populations of Culicoides. These data, alongside that defining thresholds for virus replication within Culicoides, provide a primary tool for risk assessment of arbovirus transmission in temperate regions. In addition, the study also provides a comparison with thermal limits derived directly from light-suction trapping data, which is currently used as the main method to define adult Culicoides activity during surveillance.
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Affiliation(s)
- Laura A. Tugwell
- The Pirbright Institute, Ash Road, Woking, GU24 0NF UK
- School of Veterinary Medicine, University of Surrey, Daphne Jackson Rd, Guildford, GU2 7AL UK
| | | | - Simon Gubbins
- The Pirbright Institute, Ash Road, Woking, GU24 0NF UK
| | | | | | - Joanne Stoner
- The Pirbright Institute, Ash Road, Woking, GU24 0NF UK
| | - Simon P. Graham
- The Pirbright Institute, Ash Road, Woking, GU24 0NF UK
- School of Veterinary Medicine, University of Surrey, Daphne Jackson Rd, Guildford, GU2 7AL UK
| | - Alison Blackwell
- APS Biocontrol Ltd, Prospect Business Centre, Dundee, DD2 1TY UK
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19
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Thakur N, Conceicao C, Isaacs A, Human S, Modhiran N, McLean RK, Pedrera M, Tan TK, Rijal P, Townsend A, Taylor G, Young PR, Watterson D, Chappell KJ, Graham SP, Bailey D. Micro-fusion inhibition tests: quantifying antibody neutralization of virus-mediated cell-cell fusion. J Gen Virol 2021; 102:jgv001506. [PMID: 33054904 PMCID: PMC8116787 DOI: 10.1099/jgv.0.001506] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [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] [Indexed: 12/16/2022] Open
Abstract
Although enveloped viruses canonically mediate particle entry through virus-cell fusion, certain viruses can spread by cell-cell fusion, brought about by receptor engagement and triggering of membrane-bound, viral-encoded fusion proteins on the surface of cells. The formation of pathogenic syncytia or multinucleated cells is seen in vivo, but their contribution to viral pathogenesis is poorly understood. For the negative-strand paramyxoviruses respiratory syncytial virus (RSV) and Nipah virus (NiV), cell-cell spread is highly efficient because their oligomeric fusion protein complexes are active at neutral pH. The recently emerged severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has also been reported to induce syncytia formation in infected cells, with the spike protein initiating cell-cell fusion. Whilst it is well established that fusion protein-specific antibodies can block particle attachment and/or entry into the cell (canonical virus neutralization), their capacity to inhibit cell-cell fusion and the consequences of this neutralization for the control of infection are not well characterized, in part because of the lack of specific tools to assay and quantify this activity. Using an adapted bimolecular fluorescence complementation assay, based on a split GFP-Renilla luciferase reporter, we have established a micro-fusion inhibition test (mFIT) that allows the identification and quantification of these neutralizing antibodies. This assay has been optimized for high-throughput use and its applicability has been demonstrated by screening monoclonal antibody (mAb)-mediated inhibition of RSV and NiV fusion and, separately, the development of fusion-inhibitory antibodies following NiV vaccine immunization in pigs. In light of the recent emergence of coronavirus disease 2019 (COVID-19), a similar assay was developed for SARS-CoV-2 and used to screen mAbs and convalescent patient plasma for fusion-inhibitory antibodies. Using mFITs to assess antibody responses following natural infection or vaccination is favourable, as this assay can be performed entirely at low biocontainment, without the need for live virus. In addition, the repertoire of antibodies that inhibit cell-cell fusion may be different to those that inhibit particle entry, shedding light on the mechanisms underpinning antibody-mediated neutralization of viral spread.
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Affiliation(s)
- Nazia Thakur
- The Pirbright Institute, Ash Road, Pirbright, Woking, GU24 0NF, UK
| | - Carina Conceicao
- The Pirbright Institute, Ash Road, Pirbright, Woking, GU24 0NF, UK
| | - Ariel Isaacs
- University of Queensland, Brisbane, Queensland 4071, Australia
| | - Stacey Human
- The Pirbright Institute, Ash Road, Pirbright, Woking, GU24 0NF, UK
| | - Naphak Modhiran
- University of Queensland, Brisbane, Queensland 4071, Australia
| | - Rebecca K McLean
- The Pirbright Institute, Ash Road, Pirbright, Woking, GU24 0NF, UK
| | - Miriam Pedrera
- The Pirbright Institute, Ash Road, Pirbright, Woking, GU24 0NF, UK
| | - Tiong Kit Tan
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford OX3 9DS, UK
| | - Pramila Rijal
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford OX3 9DS, UK
| | - Alain Townsend
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford OX3 9DS, UK
| | - Geraldine Taylor
- The Pirbright Institute, Ash Road, Pirbright, Woking, GU24 0NF, UK
| | - Paul R Young
- University of Queensland, Brisbane, Queensland 4071, Australia
| | | | | | - Simon P Graham
- The Pirbright Institute, Ash Road, Pirbright, Woking, GU24 0NF, UK
| | - Dalan Bailey
- The Pirbright Institute, Ash Road, Pirbright, Woking, GU24 0NF, UK
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20
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Baron MD, Hodgson S, Moffat K, Qureshi M, Graham SP, Darpel KE. Depletion of CD8 + T cells from vaccinated goats does not affect protection from challenge with wild-type peste des petits ruminants virus. Transbound Emerg Dis 2020; 68:3320-3334. [PMID: 33222411 PMCID: PMC9291567 DOI: 10.1111/tbed.13936] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 09/01/2020] [Revised: 11/18/2020] [Accepted: 11/18/2020] [Indexed: 12/15/2022]
Abstract
Peste des petits ruminants (PPR) is a severe disease of goats and sheep that is widespread in Africa, the Middle East and Asia. The disease is caused by peste des petits ruminants virus (PPRV); cell culture-attenuated strains of PPRV have been shown, both experimentally and by extensive use in the field, to be effective vaccines and are widely used. We have previously demonstrated that these vaccines elicit both serological (PPRV-specific antibody) and cell-based (PPRV-specific CD4+ and CD8+ T cells) immune responses. However, it is not known which of these responses are required for protection from PPRV, information that would be useful in the evaluation of new vaccines that are being developed to provide the capability to differentiate infected and vaccinated animals (DIVA capability). To begin to address this issue, we have used a complement-fixing monoclonal antibody recognizing caprine CD8 to deplete >99.9% of circulating CD8+ T cells from vaccinated goats. Animals were then infected with wild-type PPRV. Despite the absence of the CD8+ T-cell component of the vaccine-induced immune response, the vaccinated animals were almost fully protected, showing no pyrexia or viraemia, and almost no clinical signs. These data suggest that a virus-specific CD8+ T-cell response is not critical for protection against PPRV and that virus-specific antibody and/or CD4+ T cells are the main mediators of protection. We have also shown that the leucopenia caused by infection with wild-type PPRV affects all major classes of circulating leucocytes.
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Affiliation(s)
| | - Sophia Hodgson
- The Pirbright Institute, Pirbright, UK.,School of Veterinary Medicine, University of Surrey, Guildford, UK
| | | | | | - Simon P Graham
- The Pirbright Institute, Pirbright, UK.,School of Veterinary Medicine, University of Surrey, Guildford, UK
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21
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Riitho V, Strong R, Larska M, Graham SP, Steinbach F. Bovine Pestivirus Heterogeneity and Its Potential Impact on Vaccination and Diagnosis. Viruses 2020; 12:v12101134. [PMID: 33036281 PMCID: PMC7601184 DOI: 10.3390/v12101134] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 09/29/2020] [Accepted: 10/03/2020] [Indexed: 12/15/2022] Open
Abstract
Bovine Pestiviruses A and B, formerly known as bovine viral diarrhoea viruses (BVDV)-1 and 2, respectively, are important pathogens of cattle worldwide, responsible for significant economic losses. Bovine viral diarrhoea control programmes are in effect in several high-income countries but less so in low- and middle-income countries where bovine pestiviruses are not considered in disease control programmes. However, bovine pestiviruses are genetically and antigenically diverse, which affects the efficiency of the control programmes. The emergence of atypical ruminant pestiviruses (Pestivirus H or BVDV-3) from various parts of the world and the detection of Pestivirus D (border disease virus) in cattle highlights the challenge that pestiviruses continue to pose to control measures including the development of vaccines with improved cross-protective potential and enhanced diagnostics. This review examines the effect of bovine pestivirus diversity and emergence of atypical pestiviruses in disease control by vaccination and diagnosis.
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Affiliation(s)
- Victor Riitho
- Virology Department, Animal and Plant Health Agency, APHA-Weybridge, Woodham Lane, New Haw, Addlestone KT15 3NB, UK; (V.R.); (R.S.)
| | - Rebecca Strong
- Virology Department, Animal and Plant Health Agency, APHA-Weybridge, Woodham Lane, New Haw, Addlestone KT15 3NB, UK; (V.R.); (R.S.)
| | - Magdalena Larska
- Department of Virology, National Veterinary Research Institute, Al. Partyzantów 57, 24-100 Puławy, Poland;
| | - Simon P. Graham
- The Pirbright Institute, Ash Road, Pirbright GU24 0NF, UK;
- School of Veterinary Medicine, University of Surrey, Guilford GU2 7XH, UK
| | - Falko Steinbach
- Virology Department, Animal and Plant Health Agency, APHA-Weybridge, Woodham Lane, New Haw, Addlestone KT15 3NB, UK; (V.R.); (R.S.)
- School of Veterinary Medicine, University of Surrey, Guilford GU2 7XH, UK
- Correspondence:
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22
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Graham SP, McLean RK, Spencer AJ, Belij-Rammerstorfer S, Wright D, Ulaszewska M, Edwards JC, Hayes JWP, Martini V, Thakur N, Conceicao C, Dietrich I, Shelton H, Waters R, Ludi A, Wilsden G, Browning C, Bialy D, Bhat S, Stevenson-Leggett P, Hollinghurst P, Gilbride C, Pulido D, Moffat K, Sharpe H, Allen E, Mioulet V, Chiu C, Newman J, Asfor AS, Burman A, Crossley S, Huo J, Owens RJ, Carroll M, Hammond JA, Tchilian E, Bailey D, Charleston B, Gilbert SC, Tuthill TJ, Lambe T. Evaluation of the immunogenicity of prime-boost vaccination with the replication-deficient viral vectored COVID-19 vaccine candidate ChAdOx1 nCoV-19. NPJ Vaccines 2020; 5:69. [PMID: 32793398 PMCID: PMC7385486 DOI: 10.1038/s41541-020-00221-3] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 07/14/2020] [Indexed: 12/31/2022] Open
Abstract
Clinical development of the COVID-19 vaccine candidate ChAdOx1 nCoV-19, a replication-deficient simian adenoviral vector expressing the full-length SARS-CoV-2 spike (S) protein was initiated in April 2020 following non-human primate studies using a single immunisation. Here, we compared the immunogenicity of one or two doses of ChAdOx1 nCoV-19 in both mice and pigs. Whilst a single dose induced antigen-specific antibody and T cells responses, a booster immunisation enhanced antibody responses, particularly in pigs, with a significant increase in SARS-CoV-2 neutralising titres.
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Affiliation(s)
| | | | - Alexandra J. Spencer
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ UK
| | - Sandra Belij-Rammerstorfer
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ UK
| | - Daniel Wright
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ UK
| | - Marta Ulaszewska
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ UK
| | | | | | | | - Nazia Thakur
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | | | | | - Holly Shelton
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | - Ryan Waters
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | - Anna Ludi
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | | | - Clare Browning
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | - Dagmara Bialy
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | - Sushant Bhat
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | | | - Philippa Hollinghurst
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
- Department of Microbial Sciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH UK
| | - Ciaran Gilbride
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ UK
| | - David Pulido
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ UK
| | - Katy Moffat
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | - Hannah Sharpe
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ UK
| | - Elizabeth Allen
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ UK
| | | | - Chris Chiu
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | - Joseph Newman
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | - Amin S. Asfor
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | - Alison Burman
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | | | - Jiandong Huo
- Protein Production UK, Research Complex at Harwell, and Rosalind Franklin Institute Rutherford Appleton Laboratory Harwell Oxford, Didcot, OX11 0FA UK
- Division of Structural Biology, Henry Wellcome Building for Genomic Medicine, University of Oxford, Oxford, OX3 7BN UK
| | - Raymond J. Owens
- Protein Production UK, Research Complex at Harwell, and Rosalind Franklin Institute Rutherford Appleton Laboratory Harwell Oxford, Didcot, OX11 0FA UK
- Division of Structural Biology, Henry Wellcome Building for Genomic Medicine, University of Oxford, Oxford, OX3 7BN UK
| | - Miles Carroll
- Public Health England, Manor Farm Road, Salisbury, SP4 0JG UK
| | | | - Elma Tchilian
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | - Dalan Bailey
- The Pirbright Institute, Ash Road, Pirbright, GU24 0NF UK
| | | | - Sarah C. Gilbert
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ UK
| | | | - Teresa Lambe
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ UK
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23
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Pedrera M, Macchi F, McLean RK, Franceschi V, Thakur N, Russo L, Medfai L, Todd S, Tchilian EZ, Audonnet JC, Chappell K, Isaacs A, Watterson D, Young PR, Marsh GA, Bailey D, Graham SP, Donofrio G. Bovine Herpesvirus-4-Vectored Delivery of Nipah Virus Glycoproteins Enhances T Cell Immunogenicity in Pigs. Vaccines (Basel) 2020; 8:vaccines8010115. [PMID: 32131403 PMCID: PMC7157636 DOI: 10.3390/vaccines8010115] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 02/24/2020] [Accepted: 02/27/2020] [Indexed: 02/07/2023] Open
Abstract
Nipah virus (NiV) is an emergent pathogen capable of causing acute respiratory illness and fatal encephalitis in pigs and humans. A high fatality rate and broad host tropism makes NiV a serious public and animal health concern. There is therefore an urgent need for a NiV vaccines to protect animals and humans. In this study we investigated the immunogenicity of bovine herpesvirus (BoHV-4) vectors expressing either NiV attachment (G) or fusion (F) glycoproteins, BoHV-4-A-CMV-NiV-GΔTK or BoHV-4-A-CMV-NiV-FΔTK, respectively in pigs. The vaccines were benchmarked against a canarypox (ALVAC) vector expressing NiV G, previously demonstrated to induce protective immunity in pigs. Both BoHV-4 vectors induced robust antigen-specific antibody responses. BoHV-4-A-CMV-NiV-GΔTK stimulated NiV-neutralizing antibody titers comparable to ALVAC NiV G and greater than those induced by BoHV-4-A-CMV-NiV-FΔTK. In contrast, only BoHV-4-A-CMV-NiV-FΔTK immunized pigs had antibodies capable of significantly neutralizing NiV G and F-mediated cell fusion. All three vectored vaccines evoked antigen-specific CD4 and CD8 T cell responses, which were particularly strong in BoHV-4-A-CMV-NiV-GΔTK immunized pigs and to a lesser extent BoHV-4-A-CMV-NiV-FΔTK. These findings emphasize the potential of BoHV-4 vectors for inducing antibody and cell-mediated immunity in pigs and provide a solid basis for the further evaluation of these vectored NiV vaccine candidates.
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Affiliation(s)
- Miriam Pedrera
- The Pirbright Institute, Ash Road, Pirbright GU24 0NF, UK; (M.P.); (R.K.M.); (N.T.); (L.M.); (E.Z.T.); (D.B.)
| | - Francesca Macchi
- Department of Medical-Veterinary Science, University of Parma, 43126 Parma, Italy; (F.M.); (V.F.); (L.R.)
| | - Rebecca K. McLean
- The Pirbright Institute, Ash Road, Pirbright GU24 0NF, UK; (M.P.); (R.K.M.); (N.T.); (L.M.); (E.Z.T.); (D.B.)
| | - Valentina Franceschi
- Department of Medical-Veterinary Science, University of Parma, 43126 Parma, Italy; (F.M.); (V.F.); (L.R.)
| | - Nazia Thakur
- The Pirbright Institute, Ash Road, Pirbright GU24 0NF, UK; (M.P.); (R.K.M.); (N.T.); (L.M.); (E.Z.T.); (D.B.)
| | - Luca Russo
- Department of Medical-Veterinary Science, University of Parma, 43126 Parma, Italy; (F.M.); (V.F.); (L.R.)
| | - Lobna Medfai
- The Pirbright Institute, Ash Road, Pirbright GU24 0NF, UK; (M.P.); (R.K.M.); (N.T.); (L.M.); (E.Z.T.); (D.B.)
- UnivLyon, Université Claude Bernard Lyon 1, 69100 Villeurbanne, France
| | - Shawn Todd
- CSIRO Health and Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria 3219, Australia; (S.T.); (G.A.M.)
| | - Elma Z. Tchilian
- The Pirbright Institute, Ash Road, Pirbright GU24 0NF, UK; (M.P.); (R.K.M.); (N.T.); (L.M.); (E.Z.T.); (D.B.)
| | - Jean-Christophe Audonnet
- Boehringer Ingelheim Animal Health, Bâtiment 700 R&D, 813 Cours du 3ème Millénaire, 69800 Saint Priest, France;
| | - Keith Chappell
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, University of Queensland, St. Lucia, Queensland 4072, Australia; (K.C.); (A.I.); (D.W.); (P.R.Y.)
| | - Ariel Isaacs
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, University of Queensland, St. Lucia, Queensland 4072, Australia; (K.C.); (A.I.); (D.W.); (P.R.Y.)
| | - Daniel Watterson
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, University of Queensland, St. Lucia, Queensland 4072, Australia; (K.C.); (A.I.); (D.W.); (P.R.Y.)
| | - Paul R. Young
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, University of Queensland, St. Lucia, Queensland 4072, Australia; (K.C.); (A.I.); (D.W.); (P.R.Y.)
| | - Glenn A. Marsh
- CSIRO Health and Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria 3219, Australia; (S.T.); (G.A.M.)
| | - Dalan Bailey
- The Pirbright Institute, Ash Road, Pirbright GU24 0NF, UK; (M.P.); (R.K.M.); (N.T.); (L.M.); (E.Z.T.); (D.B.)
| | - Simon P. Graham
- The Pirbright Institute, Ash Road, Pirbright GU24 0NF, UK; (M.P.); (R.K.M.); (N.T.); (L.M.); (E.Z.T.); (D.B.)
- Correspondence: (S.P.G.); (G.D.)
| | - Gaetano Donofrio
- Department of Medical-Veterinary Science, University of Parma, 43126 Parma, Italy; (F.M.); (V.F.); (L.R.)
- Correspondence: (S.P.G.); (G.D.)
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24
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McCarthy RR, Everett HE, Graham SP, Steinbach F, Crooke HR. Head Start Immunity: Characterizing the Early Protection of C Strain Vaccine Against Subsequent Classical Swine Fever Virus Infection. Front Immunol 2019; 10:1584. [PMID: 31396205 PMCID: PMC6663987 DOI: 10.3389/fimmu.2019.01584] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 01/04/2019] [Accepted: 06/25/2019] [Indexed: 01/18/2023] Open
Abstract
Classical Swine Fever Virus (CSFV) is an ongoing threat to the pig industry due to the high transmission and mortality rates associated with infection. Live attenuated vaccines such as the CSFV C strain vaccine are capable of protecting against infection within 5 days of vaccination, but the molecular mechanisms through which this early protection is mediated have yet to be established. In this study, we compared the response of pigs vaccinated with the C strain to non-vaccinated pigs both challenged with a pathogenic strain of CSFV. Analysis of transcriptomic data from the tonsils of these animals during the early stages after vaccination and challenge reveals a set of regulated genes that appear throughout the analysis. Many of these are linked to the ISG15 antiviral pathway suggesting it may play a role in the rapid and early protection conferred by C strain vaccination.
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Affiliation(s)
- Ronan R McCarthy
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Helen E Everett
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Simon P Graham
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom.,School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom.,The Pirbright Institute, Pirbright, United Kingdom
| | - Falko Steinbach
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom.,School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom
| | - Helen R Crooke
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom
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25
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Graham SP, El-Sharif HF, Hussain S, Fruengel R, McLean RK, Hawes PC, Sullivan MV, Reddy SM. Evaluation of Molecularly Imprinted Polymers as Synthetic Virus Neutralizing Antibody Mimics. Front Bioeng Biotechnol 2019; 7:115. [PMID: 31179277 PMCID: PMC6542949 DOI: 10.3389/fbioe.2019.00115] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 05/07/2019] [Indexed: 11/13/2022] Open
Abstract
Rapid development of antibody-based therapeutics are crucial to the agenda of innovative manufacturing of macromolecular therapies to combat emergent diseases. Although highly specific, antibody therapies are costly to produce. Molecularly imprinted polymers (MIPs) constitute a rapidly-evolving class of antigen-recognition materials that act as synthetic antibodies. We report here on the virus neutralizing capacity of hydrogel-based MIPs. We produced MIPs using porcine reproductive and respiratory syndrome virus (PRRSV-1), as a model mammalian virus. Assays were performed to evaluate the specificity of virus neutralization, the effect of incubation time and MIP concentration. Polyacrylamide and N-hydroxymethylacrylamide based MIPs produced a highly significant reduction in infectious viral titer recovered after treatment, reducing it to the limit of detection of the assay. MIP specificity was tested by comparing their neutralizing effects on PRRSV-1 to the effects on the unrelated bovine viral diarrhea virus-1; no significant cross-reactivity was observed. The MIPs demonstrated effective virus neutralization in just 2.5 min and their effect was concentration dependent. These data support the further evaluation of MIPs as synthetic antibodies as a novel approach to the treatment of viral infection.
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Affiliation(s)
- Simon P. Graham
- School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom
- The Pirbright Institute, Pirbright, United Kingdom
| | - Hazim F. El-Sharif
- Department of Chemistry, University of Central Lancashire, Preston, United Kingdom
| | - Sabha Hussain
- School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom
| | - Rieke Fruengel
- School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom
| | | | | | - Mark V. Sullivan
- Department of Chemistry, University of Central Lancashire, Preston, United Kingdom
| | - Subrayal M. Reddy
- Department of Chemistry, University of Central Lancashire, Preston, United Kingdom
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26
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Goldeck D, Perry DM, Hayes JWP, Johnson LPM, Young JE, Roychoudhury P, McLuskey EL, Moffat K, Bakker AQ, Kwakkenbos MJ, Frossard JP, Rowland RRR, Murtaugh MP, Graham SP. Establishment of Systems to Enable Isolation of Porcine Monoclonal Antibodies Broadly Neutralizing the Porcine Reproductive and Respiratory Syndrome Virus. Front Immunol 2019; 10:572. [PMID: 30972067 PMCID: PMC6445960 DOI: 10.3389/fimmu.2019.00572] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 01/10/2019] [Accepted: 03/04/2019] [Indexed: 02/01/2023] Open
Abstract
The rapid evolution of porcine reproductive and respiratory syndrome viruses (PRRSV) poses a major challenge to effective disease control since available vaccines show variable efficacy against divergent strains. Knowledge of the antigenic targets of virus-neutralizing antibodies that confer protection against heterologous PRRSV strains would be a catalyst for the development of next-generation vaccines. Key to discovering these epitopes is the isolation of neutralizing monoclonal antibodies (mAbs) from immune pigs. To address this need, we sought to establish systems to enable the isolation of PRRSV neutralizing porcine mAbs. We experimentally produced a cohort of immune pigs by sequential challenge infection with four heterologous PRRSV strains spanning PRRSV-1 subtypes and PRRSV species. Whilst priming with PRRSV-1 subtype 1 did not confer full protection against a subsequent infection with a PRRSV-1 subtype 3 strain, animals were protected against a subsequent PRRSV-2 infection. The infection protocol resulted in high serum neutralizing antibody titers against PRRSV-1 Olot/91 and significant neutralization of heterologous PRRSV-1/-2 strains. Enriched memory B cells isolated at the termination of the study were genetically programmed by transduction with a retroviral vector expressing the Bcl-6 transcription factor and the anti-apoptotic Bcl-xL protein, a technology we demonstrated efficiently converts porcine memory B cells into proliferating antibody-secreting cells. Pools of transduced memory B cells were cultured and supernatants containing PRRSV-specific antibodies identified by flow cytometric staining of infected MARC-145 cells and in vitro neutralization of PRRSV-1. Collectively, these data suggest that this experimental system may be further exploited to produce a panel of PRRSV-specific mAbs, which will contribute both to our understanding of the antibody response to PRRSV and allow epitopes to be resolved that may ultimately guide the design of immunogens to induce cross-protective immunity.
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Affiliation(s)
| | - Dana M Perry
- The Pirbright Institute, Pirbright, United Kingdom.,School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Jack W P Hayes
- The Pirbright Institute, Pirbright, United Kingdom.,School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Luke P M Johnson
- The Pirbright Institute, Pirbright, United Kingdom.,School of Veterinary Science, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Jordan E Young
- College of Veterinary Medicine, University of Minnesota, St. Paul, MN, United States
| | - Parimal Roychoudhury
- The Pirbright Institute, Pirbright, United Kingdom.,College of Veterinary Science and Animal Husbandry, Central Agricultural University, Aizawl, India
| | - Elle L McLuskey
- The Pirbright Institute, Pirbright, United Kingdom.,Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Katy Moffat
- The Pirbright Institute, Pirbright, United Kingdom
| | | | | | - Jean-Pierre Frossard
- Department of Virology, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Raymond R R Rowland
- College of Veterinary Medicine, Kansas State University, Manhattan, KS, United States
| | - Michael P Murtaugh
- College of Veterinary Medicine, University of Minnesota, St. Paul, MN, United States
| | - Simon P Graham
- The Pirbright Institute, Pirbright, United Kingdom.,School of Veterinary Science, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
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27
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Abstract
Nipah virus (NiV) causes a severe and often fatal neurological disease in humans. Whilst fruit bats are considered the natural reservoir, NiV also infects pigs and may cause an unapparent or mild disease. Direct pig-to-human transmission was responsible for the first and still most devastating NiV outbreaks in Malaysia and Singapore in 1998–99, with nearly 300 human cases and over 100 fatalities. Pigs can therefore play a key role in the epidemiology of NiV by acting as an “amplifying” host. The outbreak in Singapore ended with the prohibition of pig imports from Malaysia and the Malaysian outbreak was ended by culling 45% of the country's pig population with costs exceeding US$500 million. Despite the importance of NiV as an emerging disease with the potential for pandemic, no vaccines, or therapeutics are currently approved for human or livestock use. In this mini-review, we will discuss current knowledge of NiV infection in pigs; our ongoing work to develop a NiV vaccine for use in pigs; and the pig as a model to support human vaccine development.
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Affiliation(s)
| | - Simon P Graham
- The Pirbright Institute, Pirbright, United Kingdom.,School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom
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28
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Soldevila F, Edwards JC, Graham SP, Stevens LM, Crudgington B, Crooke HR, Werling D, Steinbach F. Characterization of the Myeloid Cell Populations' Resident in the Porcine Palatine Tonsil. Front Immunol 2018; 9:1800. [PMID: 30158925 PMCID: PMC6104124 DOI: 10.3389/fimmu.2018.01800] [Citation(s) in RCA: 13] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 07/20/2018] [Indexed: 12/22/2022] Open
Abstract
The palatine tonsil is the portal of entry for food and air and is continuously subjected to environmental challenges, including pathogens, which use the tonsil and pharynx as a primary site of replication. In pigs, this includes the viruses causing porcine respiratory and reproductive syndrome, and classical and African swine fever; diseases that have impacted the pig production industry globally. Despite the importance of tonsils in host defense, little is known regarding the phenotype of the myeloid cells resident in the porcine tonsil. Here, we have characterized five myeloid cell populations that align to orthologous populations defined in other mammalian species: a CD4+ plasmacytoid dendritic cell (DC) defined by expression of the conserved markers E2.2 and IRF-7, a conventional dendritic cell (cDC1) population expressing CADM1highCD172alow and high levels of XCR1 able to activate allogeneic CD4 and CD8 T cells; a cDC2 population of CADM1dim cells expressing FLT3, IRF4, and CSF1R with an ability to activate allogeneic CD4 T cells; CD163+ macrophages (Mϴs) defined by high levels of endocytosis and responsiveness to LPS and finally a CD14+ population likely derived from the myelomonocytic lineage, which showed the highest levels of endocytosis, a capacity for activation of CD4+ memory T cells, combined with lower relative expression of FLT3. Increased knowledge regarding the phenotypic and functional properties of myeloid cells resident in porcine tonsil will enable these cells to be targeted for future vaccination strategies to current and emerging porcine viruses.
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Affiliation(s)
- Ferran Soldevila
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Jane C Edwards
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Simon P Graham
- The Pirbright Institute, Pirbright, United Kingdom.,School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom
| | - Lisa M Stevens
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Bentley Crudgington
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Helen R Crooke
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Dirk Werling
- Department of Pathobiology and Population Sciences, The Royal Veterinary College, Hatfield, United Kingdom
| | - Falko Steinbach
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom.,School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom
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29
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Riitho V, Larska M, Strong R, La Rocca SA, Locker N, Alenius S, Steinbach F, Liu L, Uttenthal Å, Graham SP. Comparative analysis of adaptive immune responses following experimental infections of cattle with bovine viral diarrhoea virus-1 and an Asiatic atypical ruminant pestivirus. Vaccine 2018; 36:4494-4500. [DOI: 10.1016/j.vaccine.2018.06.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 05/28/2018] [Accepted: 06/06/2018] [Indexed: 10/14/2022]
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30
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Charleston B, Graham SP. Recent advances in veterinary applications of structural vaccinology. Curr Opin Virol 2018; 29:33-38. [PMID: 29550741 PMCID: PMC5954236 DOI: 10.1016/j.coviro.2018.02.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 02/20/2018] [Accepted: 02/28/2018] [Indexed: 01/22/2023]
Abstract
The deployment of effective veterinary vaccines has had a major impact on improving food security and consequently human health. Effective vaccines were essential for the global eradication of Rinderpest and the control and eradication of foot-and-mouth disease in some regions of the world. Effective vaccines also underpin the development of modern intensive food production systems such as poultry and aquaculture. However, for some high consequence diseases there are still significant challenges to develop effective vaccines. There is a strong track record in veterinary medicine of early adoption of new technologies to produce vaccines. Here we provide examples of new technologies to interrogate B cell responses and using structural biology to improve antigens.
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Affiliation(s)
- Bryan Charleston
- The Pirbright Institute, Ash Road, Pirbright, Guildford GU24 0NF, Surrey, United Kingdom.
| | - Simon P Graham
- The Pirbright Institute, Ash Road, Pirbright, Guildford GU24 0NF, Surrey, United Kingdom
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31
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Franzoni G, Graham SP, Sanna G, Angioi P, Fiori MS, Anfossi A, Amadori M, Dei Giudici S, Oggiano A. Interaction of porcine monocyte-derived dendritic cells with African swine fever viruses of diverse virulence. Vet Microbiol 2018. [DOI: 10.1016/j.vetmic.2018.02.021] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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32
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Strong R, Graham SP, La Rocca SA, Raue R, Vangeel I, Steinbach F. Establishment of a Bovine Viral Diarrhea Virus Type 2 Intranasal Challenge Model for Assessing Vaccine Efficacy. Front Vet Sci 2018. [PMID: 29536016 PMCID: PMC5835082 DOI: 10.3389/fvets.2018.00024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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] [Indexed: 11/13/2022] Open
Abstract
The objective of this study was to develop a bovine viral diarrhea virus type 2 (BVDV-2) challenge model suitable for evaluation of efficacy of BVDV vaccines; a model that mimics natural infection and induces clear leukopenia and viremia. Clinical, hematological and virological parameters were evaluated after infection of two age groups of calves (3 and 9 months) with two BVDV-2 strains (1362727 and 502643). Calves became pyrexic between 8 and 9 days post inoculation and exhibited symptoms, such as nasal discharge, mild depression, cough, and inappetence. Leukopenia with associated lymphopenia and neutropenia was evident in all groups with lowest leukocyte and lymphocyte counts reached 8 dpi and granulocyte counts between 11 and 16 dpi, dependent on the strain and age of the calves. A more severe thrombocytopenia was seen in those animals inoculated with strain 1362727. Leukocyte and nasal swab samples were positive by virus isolation, as early as 3 dpi and 2 dpi respectively, independent of the inocula used. All calves seroconverted with high levels of BVDV-2 neutralizing antibodies. BVDV RNA was evident as late as 90 dpi and provides the first evidence of the presence of replicating virus long after recovery from BVDV-2 experimental infection. In summary, moderate disease can be induced after experimental infection of calves with a low titer of virulent BVDV-2, with leukopenia, thrombocytopenia, viremia, and virus shedding. These strains represent an attractive model to assess the protective efficacy of existing and new vaccines against BVDV-2.
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Affiliation(s)
- Rebecca Strong
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Simon P Graham
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - S A La Rocca
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom
| | - Rudiger Raue
- Veterinary Medicine Research & Development, Zoetis, Belgium
| | - Ilse Vangeel
- Veterinary Medicine Research & Development, Zoetis, Belgium
| | - Falko Steinbach
- Virology Department, Animal and Plant Health Agency, Addlestone, United Kingdom
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33
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Riitho V, Walters AA, Somavarapu S, Lamp B, Rümenapf T, Krey T, Rey FA, Oviedo-Orta E, Stewart GR, Locker N, Steinbach F, Graham SP. Design and evaluation of the immunogenicity and efficacy of a biomimetic particulate formulation of viral antigens. Sci Rep 2017; 7:13743. [PMID: 29062078 PMCID: PMC5653838 DOI: 10.1038/s41598-017-13915-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 06/14/2017] [Accepted: 09/19/2017] [Indexed: 11/17/2022] Open
Abstract
Subunit viral vaccines are typically not as efficient as live attenuated or inactivated vaccines at inducing protective immune responses. This paper describes an alternative ‘biomimetic’ technology; whereby viral antigens were formulated around a polymeric shell in a rationally arranged fashion with a surface glycoprotein coated on to the surface and non-structural antigen and adjuvant encapsulated. We evaluated this model using BVDV E2 and NS3 proteins formulated in poly-(D, L-lactic-co-glycolic acid) (PLGA) nanoparticles adjuvanted with polyinosinic:polycytidylic acid (poly(I:C) as an adjuvant (Vaccine-NP). This Vaccine-NP was compared to ovalbumin and poly(I:C) formulated in a similar manner (Control-NP) and a commercial adjuvanted inactivated BVDV vaccine (IAV), all inoculated subcutaneously and boosted prior to BVDV-1 challenge. Significant virus-neutralizing activity, and E2 and NS3 specific antibodies were observed in both Vaccine-NP and IAV groups following the booster immunisation. IFN-γ responses were observed in ex vivo PBMC stimulated with E2 and NS3 proteins in both vaccinated groups. We observed that the protection afforded by the particulate vaccine was comparable to the licenced IAV formulation. In conclusion, the biomimetic particulates showed a promising immunogenicity and efficacy profile that may be improved by virtue of being a customisable mode of delivery.
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Affiliation(s)
- Victor Riitho
- Virology Department, Animal and Plant Health Agency, Woodham Lane, Addlestone, KT15 3NB, United Kingdom.,Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom.,International Livestock Research Institute, P.O. Box 30709, Nairobi, 00100, Kenya
| | - Adam A Walters
- Virology Department, Animal and Plant Health Agency, Woodham Lane, Addlestone, KT15 3NB, United Kingdom.,Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom.,The Jenner Institute, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ, United Kingdom
| | | | - Benjamin Lamp
- Institute for Virology, University of Veterinary Medicine Vienna, Veterinaerplatz 1, 1210, Vienna, Austria
| | - Till Rümenapf
- Institute for Virology, University of Veterinary Medicine Vienna, Veterinaerplatz 1, 1210, Vienna, Austria
| | - Thomas Krey
- Institut Pasteur, Unité de Virologie Structurale, Department Virologie, Paris CNRS UMR, 3569, Paris, France.,Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany.,German Center for Infection Research (DZIF), 30625, Hannover, Germany
| | - Felix A Rey
- Institut Pasteur, Unité de Virologie Structurale, Department Virologie, Paris CNRS UMR, 3569, Paris, France
| | - Ernesto Oviedo-Orta
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom.,Sanofi Pasteur, 1541, Avenue Marcel Merieux - Campus Merieux, 69280, Marcy, L'Etoile, France
| | - Graham R Stewart
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - Nicolas Locker
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - Falko Steinbach
- Virology Department, Animal and Plant Health Agency, Woodham Lane, Addlestone, KT15 3NB, United Kingdom.,Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - Simon P Graham
- Virology Department, Animal and Plant Health Agency, Woodham Lane, Addlestone, KT15 3NB, United Kingdom. .,Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom. .,The Pirbright Institute, Ash Road, Pirbright, Woking, GU24 0NF, United Kingdom.
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34
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Mokhtar H, Biffar L, Somavarapu S, Frossard JP, McGowan S, Pedrera M, Strong R, Edwards JC, Garcia-Durán M, Rodriguez MJ, Stewart GR, Steinbach F, Graham SP. Evaluation of hydrophobic chitosan-based particulate formulations of porcine reproductive and respiratory syndrome virus vaccine candidate T cell antigens. Vet Microbiol 2017; 209:66-74. [PMID: 28228336 DOI: 10.1016/j.vetmic.2017.01.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 11/02/2016] [Revised: 12/21/2016] [Accepted: 01/30/2017] [Indexed: 01/06/2023]
Abstract
PRRS control is hampered by the inadequacies of existing vaccines to combat the extreme diversity of circulating viruses. Since immune clearance of PRRSV infection may not be dependent on the development of neutralising antibodies and the identification of broadly-neutralising antibody epitopes have proven elusive, we hypothesised that conserved T cell antigens represent potential candidates for development of a novel PRRS vaccine. Previously we had identified the M and NSP5 proteins as well-conserved targets of polyfunctional CD8 and CD4 T cells. To assess their vaccine potential, peptides representing M and NSP5 were encapsulated in hydrophobically-modified chitosan particles adjuvanted by incorporation of a synthetic multi-TLR2/TLR7 agonist and coated with a model B cell PRRSV antigen. For comparison, empty particles and adjuvanted particles encapsulating inactivated PRRSV-1 were prepared. Vaccination with the particulate formulations induced antigen-specific antibody responses, which were most pronounced following booster immunisation. M and NSP5-specific CD4, but not CD8, T cell IFN-γ reactivity was measurable following the booster immunisation in a proportion of animals vaccinated with peptide-loaded particles. Upon challenge, CD4 and CD8 T cell reactivity was detected in all groups, with the greatest responses being detected in the peptide vaccinated group but with limited evidence of an enhanced control of viraemia. Analysis of the lungs during the resolution of infection showed significant M/NSP5 specific IFN-γ responses from CD8 rather than CD4 T cells. Vaccine primed CD8 T cell responses may therefore be required for protection and future work should focus on enhancing the cross-presentation of M/NSP5 to CD8 T cells.
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Affiliation(s)
- Helen Mokhtar
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, United Kingdom; Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - Lucia Biffar
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, United Kingdom
| | - Satyanarayana Somavarapu
- School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, United Kingdom
| | - Jean-Pierre Frossard
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, United Kingdom
| | - Sarah McGowan
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, United Kingdom
| | - Miriam Pedrera
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, United Kingdom
| | - Rebecca Strong
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, United Kingdom
| | - Jane C Edwards
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, United Kingdom
| | | | | | - Graham R Stewart
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - Falko Steinbach
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, United Kingdom; Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - Simon P Graham
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, United Kingdom; Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom.
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35
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Franzoni G, Graham SP, Giudici SD, Bonelli P, Pilo G, Anfossi AG, Pittau M, Nicolussi PS, Laddomada A, Oggiano A. Characterization of the interaction of African swine fever virus with monocytes and derived macrophage subsets. Vet Microbiol 2016; 198:88-98. [PMID: 28062012 DOI: 10.1016/j.vetmic.2016.12.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [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: 09/22/2016] [Revised: 12/08/2016] [Accepted: 12/09/2016] [Indexed: 12/20/2022]
Abstract
African swine fever (ASF) is a devastating disease for which there is no vaccine available. The ASF virus (ASFV) primarily infects cells of the myeloid lineage and this tropism is thought to be crucial for disease pathogenesis. A detailed in vitro characterization of the interactions of a virulent Sardinian isolate (22653/14) and a tissue culture adapted avirulent strain (BA71V) of ASFV with porcine monocytes, un-activated (moMΦ), classically (moM1) and alternatively (moM2) activated monocyte-derived macrophages was conducted in an attempt to better understand this relationship. Using a multiplicity-of-infection (MOI) of 1, both viruses were able to infect monocytes and macrophage subsets, but BA71V presented a reduced ability to infect moM1 compared to 22653/14, with higher expression of early compared to late proteins. Using an MOI of 0.01, only 22653/14 was able to replicate in all the macrophage subsets, with initially lowest in moM1 and moM2. No differences were observed in the expression of CD163 between ASFV infected and uninfected bystander cells. ASFV down-regulated CD16 expression but did not modulate MHC class II levels in monocytes and macrophage subsets. BA71V-infected but not 22653/14-infected moMΦ and moM2 presented with a reduced expression of MHC class I compared to the mock-infected controls. Higher levels of IL-18, IL1-β and IL-1α were released from moM1 after infection with BA71V compared to 22653/14 or mock-infected control. These results revealed differences between these ASFV strains, suggesting that virulent isolates have evolved mechanisms to counteract activated macrophages responses, promoting their survival, dissemination in the host and so ASF pathogenesis.
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Affiliation(s)
- Giulia Franzoni
- Department of Veterinary Medicine, University of Sassari, Sassari, 07100, Italy; Istituto Zooprofilattico Sperimentale della Sardegna, Sassari, 07100, Italy.
| | - Simon P Graham
- School of Veterinary Medicine, University of Surrey, Guildford, GU2 7AL, United Kingdom; The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, United Kingdom.
| | - Silvia Dei Giudici
- Istituto Zooprofilattico Sperimentale della Sardegna, Sassari, 07100, Italy.
| | - Piero Bonelli
- Istituto Zooprofilattico Sperimentale della Sardegna, Sassari, 07100, Italy.
| | - Giovannantonio Pilo
- Istituto Zooprofilattico Sperimentale della Sardegna, Sassari, 07100, Italy.
| | - Antonio G Anfossi
- Department of Veterinary Medicine, University of Sassari, Sassari, 07100, Italy.
| | - Marco Pittau
- Department of Veterinary Medicine, University of Sassari, Sassari, 07100, Italy.
| | - Paola S Nicolussi
- Istituto Zooprofilattico Sperimentale della Sardegna, Sassari, 07100, Italy.
| | - Alberto Laddomada
- Istituto Zooprofilattico Sperimentale della Sardegna, Sassari, 07100, Italy.
| | - Annalisa Oggiano
- Istituto Zooprofilattico Sperimentale della Sardegna, Sassari, 07100, Italy.
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36
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Connelley TK, Li X, MacHugh N, Colau D, Graham SP, van der Bruggen P, Taracha EL, Gill A, Morrison WI. CD8 T-cell responses against the immunodominant Theileria parva peptide Tp249-59 are composed of two distinct populations specific for overlapping 11-mer and 10-mer epitopes. Immunology 2016; 149:172-85. [PMID: 27317384 PMCID: PMC5011678 DOI: 10.1111/imm.12637] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 06/07/2016] [Accepted: 06/07/2016] [Indexed: 01/30/2023] Open
Abstract
Immunity against Theileria parva is associated with CD8 T‐cell responses that exhibit immunodominance, focusing the response against limited numbers of epitopes. As candidates for inclusion in vaccines, characterization of responses against immunodominant epitopes is a key component in novel vaccine development. We have previously demonstrated that the Tp249–59 and Tp1214–224 epitopes dominate CD8 T‐cell responses in BoLA‐A10 and BoLA‐18 MHC I homozygous animals, respectively. In this study, peptide–MHC I tetramers for these epitopes, and a subdominant BoLA‐A10‐restricted epitope (Tp298–106), were generated to facilitate accurate and rapid enumeration of epitope‐specific CD8 T cells. During validation of these tetramers a substantial proportion of Tp249–59‐reactive T cells failed to bind the tetramer, suggesting that this population was heterogeneous with respect to the recognized epitope. We demonstrate that Tp250–59 represents a distinct epitope and that tetramers produced with Tp50–59 and Tp49–59 show no cross‐reactivity. The Tp249–59 and Tp250–59 epitopes use different serine residues as the N‐terminal anchor for binding to the presenting MHC I molecule. Molecular dynamic modelling predicts that the two peptide–MHC I complexes adopt structurally different conformations and Tcell receptor β sequence analysis showed that Tp249–59 and Tp250–59 are recognized by non‐overlapping T‐cell receptor repertoires. Together these data demonstrate that although differing by only a single residue, Tp249–59 and Tp250–59 epitopes form distinct ligands for T‐cell receptor recognition. Tetramer analysis of T. parva‐specific CD8 T‐cell lines confirmed the immunodominance of Tp1214–224 in BoLA‐A18 animals and showed in BoLA‐A10 animals that the Tp249–59 epitope response was generally more dominant than the Tp250–59 response and confirmed that the Tp298–106 response was subdominant.
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Affiliation(s)
- Timothy K Connelley
- Division of Immunity and Infection, The Roslin Institute, The University of Edinburgh, Midlothian, UK
| | - Xiaoying Li
- Division of Immunity and Infection, The Roslin Institute, The University of Edinburgh, Midlothian, UK
| | - Niall MacHugh
- Division of Immunity and Infection, The Roslin Institute, The University of Edinburgh, Midlothian, UK
| | - Didier Colau
- Ludwig Institute for Cancer Research and de Duve Institute, Universite catholique de Louvain, Brussels, Belgium
| | - Simon P Graham
- The International Livestock Research Institute, Nairobi, Kenya
| | - Pierre van der Bruggen
- Ludwig Institute for Cancer Research and de Duve Institute, Universite catholique de Louvain, Brussels, Belgium
| | - Evans L Taracha
- The International Livestock Research Institute, Nairobi, Kenya
| | - Andy Gill
- Division of Neurobiology, The Roslin Institute, The University of Edinburgh, Midlothian, UK
| | - William Ivan Morrison
- Division of Immunity and Infection, The Roslin Institute, The University of Edinburgh, Midlothian, UK
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37
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Singleton H, Graham SP, Bodman-Smith KB, Frossard JP, Steinbach F. Establishing Porcine Monocyte-Derived Macrophage and Dendritic Cell Systems for Studying the Interaction with PRRSV-1. Front Microbiol 2016; 7:832. [PMID: 27313573 PMCID: PMC4889594 DOI: 10.3389/fmicb.2016.00832] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 05/17/2016] [Indexed: 11/13/2022] Open
Abstract
Monocyte-derived macrophages (MoMØ) and monocyte-derived dendritic cells (MoDC) are two model systems well established in human and rodent systems that can be used to study the interaction of pathogens with host cells. Porcine reproductive and respiratory syndrome virus (PRRSV) is known to infect myeloid cells, such as macrophages (MØ) and dendritic cells (DC). Therefore, this study aimed to establish systems for the differentiation and characterization of MoMØ and MoDC for subsequent infection with PRRSV-1. M-CSF differentiated MoMØ were stimulated with activators for classical (M1) or alternative (M2) activation. GM-CSF and IL-4 generated MoDC were activated with the well established maturation cocktail containing PAMPs and cytokines. In addition, MoMØ and MoDC were treated with dexamethasone and IL-10, which are known immuno-suppressive reagents. Cells were characterized by morphology, phenotype, and function and porcine MØ subsets highlighted some divergence from described human counterparts, while MoDC, appeared more similar to mouse and human DCs. The infection with PRRSV-1 strain Lena demonstrated different replication kinetics between MoMØ and MoDC and within subsets of each cell type. While MoMØ susceptibility was significantly increased by dexamethasone and IL-10 with an accompanying increase in CD163/CD169 expression, MoDC supported only a minimal replication of PRRSV These findings underline the high variability in the susceptibility of porcine myeloid cells toward PRRSV-1 infection.
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Affiliation(s)
- Helen Singleton
- Virology Department, Animal and Plant Health AgencySurrey, UK; Faculty of Health and Medical Sciences, University of SurreySurrey, UK
| | - Simon P Graham
- Virology Department, Animal and Plant Health AgencySurrey, UK; Faculty of Health and Medical Sciences, University of SurreySurrey, UK
| | | | | | - Falko Steinbach
- Virology Department, Animal and Plant Health AgencySurrey, UK; Faculty of Health and Medical Sciences, University of SurreySurrey, UK
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38
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Hemmink JD, Weir W, MacHugh ND, Graham SP, Patel E, Paxton E, Shiels B, Toye PG, Morrison WI, Pelle R. Limited genetic and antigenic diversity within parasite isolates used in a live vaccine against Theileria parva. Int J Parasitol 2016; 46:495-506. [PMID: 27080723 PMCID: PMC4935670 DOI: 10.1016/j.ijpara.2016.02.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 02/17/2016] [Accepted: 02/29/2016] [Indexed: 11/02/2022]
Abstract
An infection and treatment protocol is used to vaccinate cattle against Theileria parva infection. Due to incomplete cross-protection between different parasite isolates, a mixture of three isolates, termed the Muguga cocktail, is used for vaccination. While vaccination of cattle in some regions provides high levels of protection, some animals are not protected against challenge with buffalo-derived T. parva. Knowledge of the genetic composition of the Muguga cocktail vaccine is required to understand how vaccination is able to protect against field challenge and to identify the potential limitations of the vaccine. The aim of the current study was to determine the extent of genetic and antigenic diversity within the parasite isolates that constitute the Muguga cocktail. High throughput multi-locus sequencing of antigen-encoding loci was performed in parallel with typing using a panel of micro- and mini-satellite loci. The former focused on genes encoding CD8(+) T cell antigens, believed to be relevant to protective immunity. The results demonstrate that each of the three component stocks of the cocktail contains limited parasite genotypic diversity, with single alleles detected at many gene/satellite loci and, moreover, that two of the components show a very high level of similarity. Thus, the vaccine incorporates very little of the genetic and antigenic diversity observed in field populations of T. parva. The presence of alleles at low frequency (<10%) within vaccine component populations also points to the possibility of variability in the content of vaccine doses and the potential for loss of allelic diversity during tick passage. The results demonstrate that there is scope to modify the content of the vaccine in order to enhance its diversity and thus its potential for providing broad protection. The ability to accurately quantify genetic diversity in vaccine component stocks will facilitate improved quality control procedures designed to ensure the long-term efficacy of the vaccine.
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Affiliation(s)
- Johanneke D Hemmink
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Roslin, Midlothian EH25 9RG, UK
| | - William Weir
- College of Medical, Veterinary and Life Sciences, Institute of Biodiversity Animal Health and Comparative Medicine, University of Glasgow, Henry Wellcome Building, Garscube Campus, Bearsden Road, Glasgow G61 1QH, UK
| | - Niall D MacHugh
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Roslin, Midlothian EH25 9RG, UK
| | - Simon P Graham
- The International Livestock Research Institute, PO Box 30709, Nairobi, Kenya
| | - Ekta Patel
- The International Livestock Research Institute, PO Box 30709, Nairobi, Kenya
| | - Edith Paxton
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Roslin, Midlothian EH25 9RG, UK
| | - Brian Shiels
- College of Medical, Veterinary and Life Sciences, Institute of Biodiversity Animal Health and Comparative Medicine, University of Glasgow, Henry Wellcome Building, Garscube Campus, Bearsden Road, Glasgow G61 1QH, UK
| | - Philip G Toye
- The International Livestock Research Institute, PO Box 30709, Nairobi, Kenya
| | - W Ivan Morrison
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Roslin, Midlothian EH25 9RG, UK.
| | - Roger Pelle
- The International Livestock Research Institute, PO Box 30709, Nairobi, Kenya
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Amarilla SP, Gómez-Laguna J, Carrasco L, Rodríguez-Gómez IM, Caridad Y Ocerín JM, Graham SP, Frossard JP, Steinbach F, Salguero FJ. Thymic depletion of lymphocytes is associated with the virulence of PRRSV-1 strains. Vet Microbiol 2016; 188:47-58. [PMID: 27139029 DOI: 10.1016/j.vetmic.2016.04.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 05/28/2015] [Revised: 03/31/2016] [Accepted: 04/05/2016] [Indexed: 01/29/2023]
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) exists as two distinct viruses, type 1 (PRRSV-1) and type 2 (PRRSV-2). Atrophy of the thymus in PRRSV-2 infected piglets has been associated with a loss of thymocytes. The present study aimed to evaluate the impact of PRRSV-1 strains of differing virulence on the thymus of infected piglets by analysing the histomorphometry, the presence of apoptotic cells and cells producing cytokines. Thymic samples were taken from animals experimentally infected (with LV, SU1-bel, and 215-06 strains) or mock inoculated animals at 3, 7 and 35days post-infection (dpi) and processed for histopathological and immunohistochemical analyses. PRRSV antigen was detected in the thymus from 3dpi until the end of the study in all virus-infected animals with the highest numbers of infected cells detected in SU1-bel group. The histomorphometry analysis and counts of CD3(+) thymocytes in the thymic cortex displayed significant differences between strains at different time-points (p≤0.011), with SU1-bel group showing the most severe changes at 7dpi. Cell death displayed statistically significant increase in the cortex of all infected animals, with SU1-bel group showing the highest rate at 3 and 7dpi. The number of cells immunostained against IL-1α, TNF-α and IL-10 were predominantly detected in the medulla (p≤0.01). An increase in the number of TNF-α and IL-10 positive cells was observed in LV and SU-1bel groups. Our results demonstrate that different PRRSV-1 strains induced depletion of the thymic cortex due to apoptosis of thymocytes and that the most severe depletion was associated with the highly virulent SU1-bel strain.
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Affiliation(s)
- Shyrley Paola Amarilla
- Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Campus Universitario de Rabanales, 'International Excellence Agrifood Campus, CeiA3', 14071 Córdoba, Spain.
| | | | - Librado Carrasco
- Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Campus Universitario de Rabanales, 'International Excellence Agrifood Campus, CeiA3', 14071 Córdoba, Spain
| | - Irene M Rodríguez-Gómez
- Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Campus Universitario de Rabanales, 'International Excellence Agrifood Campus, CeiA3', 14071 Córdoba, Spain
| | - José M Caridad Y Ocerín
- Department of Statistics, Econometrics, Operations Research, Business Organization and Applied Economics, Faculty of Law and Economics, 14071 Córdoba, Spain
| | - Simon P Graham
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, United Kingdom; Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford GU2 7TE, United Kingdom
| | - Jean-Pierre Frossard
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, United Kingdom
| | - Falko Steinbach
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, United Kingdom; Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford GU2 7TE, United Kingdom
| | - Francisco J Salguero
- Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford GU2 7TE, United Kingdom
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40
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Mokhtar H, Pedrera M, Frossard JP, Biffar L, Hammer SE, Kvisgaard LK, Larsen LE, Stewart GR, Somavarapu S, Steinbach F, Graham SP. The Non-structural Protein 5 and Matrix Protein Are Antigenic Targets of T Cell Immunity to Genotype 1 Porcine Reproductive and Respiratory Syndrome Viruses. Front Immunol 2016; 7:40. [PMID: 26909080 PMCID: PMC4755262 DOI: 10.3389/fimmu.2016.00040] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [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: 10/29/2015] [Accepted: 01/26/2016] [Indexed: 01/01/2023] Open
Abstract
The porcine reproductive and respiratory syndrome virus (PRRSV) is the cause of one of the most economically important diseases affecting swine worldwide. Efforts to develop a next-generation vaccine have largely focused on envelope glycoproteins to target virus-neutralizing antibody responses. However, these approaches have failed to demonstrate the necessary efficacy to progress toward market. T cells are crucial to the control of many viruses through cytolysis and cytokine secretion. Since control of PRRSV infection is not dependent on the development of neutralizing antibodies, it has been proposed that T cell-mediated immunity plays a key role. Therefore, we hypothesized that conserved T cell antigens represent prime candidates for the development a novel PRRS vaccine. Antigens were identified by screening a proteome-wide synthetic peptide library with T cells from cohorts of pigs rendered immune by experimental infections with a closely related (subtype 1) or divergent (subtype 3) PRRSV-1 strain. Dominant T cell IFN-γ responses were directed against the non-structural protein 5 (NSP5), and to a lesser extent, the matrix (M) protein. The majority of NSP5-specific CD8 T cells and M-specific CD4 T cells expressed a putative effector memory phenotype and were polyfunctional as assessed by coexpression of TNF-α and mobilization of the cytotoxic degranulation marker CD107a. Both antigens were generally well conserved among strains of both PRRSV genotypes. Thus, M and NSP5 represent attractive vaccine candidate T cell antigens, which should be evaluated further in the context of PRRSV vaccine development.
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Affiliation(s)
- Helen Mokhtar
- Virology Department, Animal and Plant Health Agency, Addlestone, UK; Department of Microbial and Cellular Sciences, University of Surrey, Guildford, UK
| | - Miriam Pedrera
- Virology Department, Animal and Plant Health Agency , Addlestone , UK
| | | | - Lucia Biffar
- Virology Department, Animal and Plant Health Agency , Addlestone , UK
| | - Sabine E Hammer
- Department of Pathobiology, Institute of Immunology, University of Veterinary Medicine Vienna , Vienna , Austria
| | - Lise K Kvisgaard
- National Veterinary Institute, Technical University of Denmark , Frederiksberg , Denmark
| | - Lars E Larsen
- National Veterinary Institute, Technical University of Denmark , Frederiksberg , Denmark
| | - Graham R Stewart
- Department of Microbial and Cellular Sciences, University of Surrey , Guildford , UK
| | | | - Falko Steinbach
- Virology Department, Animal and Plant Health Agency , Addlestone , UK
| | - Simon P Graham
- Virology Department, Animal and Plant Health Agency , Addlestone , UK
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Abstract
In approaching the development of a veterinary vaccine, researchers must choose from a bewildering array of options that can be combined to enhance benefit. The choice and combination of options is not just driven by efficacy, but also consideration of the cost, practicality, and challenges faced in licensing the product. In this review we set out the different choices faced by veterinary vaccine developers, highlight some issues, and propose some pressing needs to be addressed.
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Affiliation(s)
- Mark A Chambers
- Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford, Surrey, GU2 7AL, UK.
- Department of Bacteriology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK.
| | - Simon P Graham
- Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford, Surrey, GU2 7AL, UK
- The Pirbright Institute, Ash Road, Pirbright, Woking, GU24 0NF, UK
| | - Roberto M La Ragione
- Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford, Surrey, GU2 7AL, UK
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42
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Walters AA, Somavarapu S, Riitho V, Stewart GR, Charleston B, Steinbach F, Graham SP. Assessment of the enhancement of PLGA nanoparticle uptake by dendritic cells through the addition of natural receptor ligands and monoclonal antibody. Vaccine 2015; 33:6588-95. [DOI: 10.1016/j.vaccine.2015.10.093] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 09/23/2015] [Accepted: 10/24/2015] [Indexed: 11/29/2022]
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43
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Salguero FJ, Frossard JP, Rebel JMJ, Stadejek T, Morgan SB, Graham SP, Steinbach F. Host-pathogen interactions during porcine reproductive and respiratory syndrome virus 1 infection of piglets. Virus Res 2015; 202:135-43. [PMID: 25559070 PMCID: PMC7172408 DOI: 10.1016/j.virusres.2014.12.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 10/13/2014] [Revised: 12/18/2014] [Accepted: 12/22/2014] [Indexed: 01/26/2023]
Abstract
Porcine reproductive and respiratory syndrome (PRRS) is a major disease affecting pigs worldwide and resulting in considerable economic losses. While PRRS is a global phenomenon, the causative viruses PRRSV-1 (first detected in Europe) and PRRSV-2 (isolated in North America) are genetically and biologically distinct. In addition, the disease outcome is directly linked to co-infections associated with the porcine respiratory disease complex and the host response is variable between different breeds of pigs. It is therefore warranted when studying the pathogenesis of PRRS to consider each viral genotype separately and apply careful consideration to the disease model studied. We here review the respiratory pig model for PRRSV-1, with a focus on a recent set of studies conducted with carefully selected virus strains and pigs, which may serve as both a baseline and benchmark for future investigation.
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Affiliation(s)
- Francisco J Salguero
- Virology Department, Animal and Plant Health Agency, Weybridge, Addlestone, United Kingdom; Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom
| | - Jean-Pierre Frossard
- Virology Department, Animal and Plant Health Agency, Weybridge, Addlestone, United Kingdom.
| | - Johanna M J Rebel
- Department of Infection Biology, Central Veterinary Institute, Lelystad, The Netherlands
| | - Tomasz Stadejek
- Department of Pathology and Veterinary Diagnostics, Faculty of Veterinary Medicine, Warsaw University of Life, Poland
| | - Sophie B Morgan
- Virology Department, Animal and Plant Health Agency, Weybridge, Addlestone, United Kingdom
| | - Simon P Graham
- Virology Department, Animal and Plant Health Agency, Weybridge, Addlestone, United Kingdom; Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom
| | - Falko Steinbach
- Virology Department, Animal and Plant Health Agency, Weybridge, Addlestone, United Kingdom; Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford, United Kingdom
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44
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García-Nicolás O, Rosales RS, Pallarés FJ, Risco D, Quereda JJ, Graham SP, Frossard JP, Morgan SB, Steinbach F, Drew TW, Strickland TS, Salguero FJ. Comparative analysis of cytokine transcript profiles within mediastinal lymph node compartments of pigs after infection with porcine reproductive and respiratory syndrome genotype 1 strains differing in pathogenicity. Vet Res 2015; 46:34. [PMID: 25889072 PMCID: PMC4364558 DOI: 10.1186/s13567-015-0161-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 07/25/2014] [Accepted: 02/06/2015] [Indexed: 01/28/2023] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) induces a weak immune response enabling it to persist in different organs of infected pigs. This has been attributed to the ability of PRRSV to influence the induction of cytokine responses. In this study, we investigated the cytokine transcriptional profiles in different compartments of the mediastinal lymph node of pigs infected with three genotype 1 PRRSV strains of differing pathogenicity: the low virulence prototype Lelystad virus (LV), and UK field strain 215–06 and the highly virulent subtype 3 SU1-Bel isolate from Belarus. We have used a combination of laser capture micro-dissection (LCM) followed by real time quantitative PCR (RT-qPCR) and immunohistochemical (IHC) detection of immune cell markers (CD3, CD79a and MAC387) and RT-qPCR quantification of PRRSV and cytokine transcripts. Compared to mock infected pigs, we found a significant downregulation of TNF-α and IFN-α in follicular and interfollicular areas of the mediastinal lymph node from 3 days post-infection (dpi) in animals infected with all three strains. This was accompanied by a transient B cell depletion and T cell and macrophage infiltration in the follicles together with T cell depletion in the interfollicular areas. A delayed upregulation of IFN-γ and IL-23p19 was observed mainly in the follicles. The PRRSV load was higher in all areas and time-points studied in the animals infected with the SU1-Bel strain. This paper describes the first application of LCM to study the cytokine transcript profiles and virus distribution in different compartments of the lymph node of pigs.
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Affiliation(s)
- Obdulio García-Nicolás
- Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Murcia University, "Mare Nostrum Excellence Campus - 3738", 30100, Murcia, Spain.
| | - Rubén S Rosales
- Department of Bacteriology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK.
| | - Francisco J Pallarés
- Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Murcia University, "Mare Nostrum Excellence Campus - 3738", 30100, Murcia, Spain.
| | - David Risco
- Red de Grupos de Investigación Recursos Faunísticos, Facultad de Veterinaria, Universidad de Extremadura, 10003, Cáceres, Spain.
| | - Juan J Quereda
- Spanish National Center of Biotechnology (CSIC), C/Darwin 3, Campus de Cantoblanco, 28049, Madrid, Spain.
| | - Simon P Graham
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK.
| | - Jean-Pierre Frossard
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK.
| | - Sophie B Morgan
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK.
| | - Falko Steinbach
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK. .,Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford, GU2 7TE, UK.
| | - Trevor W Drew
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK.
| | - Tony S Strickland
- Department of Pathology, Animal and Plant Health Agency, Addlestone, KT15 3NB, UK.
| | - Francisco J Salguero
- Department of Pathology, Animal and Plant Health Agency, Addlestone, KT15 3NB, UK. .,Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford, GU2 7TE, UK.
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Amarilla SP, Gómez-Laguna J, Carrasco L, Rodríguez-Gómez IM, Caridad Y Ocerín JM, Morgan SB, Graham SP, Frossard JP, Drew TW, Salguero FJ. A comparative study of the local cytokine response in the lungs of pigs experimentally infected with different PRRSV-1 strains: upregulation of IL-1α in highly pathogenic strain induced lesions. Vet Immunol Immunopathol 2015; 164:137-47. [PMID: 25739319 DOI: 10.1016/j.vetimm.2015.02.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 01/06/2015] [Accepted: 02/05/2015] [Indexed: 11/17/2022]
Abstract
Porcine reproductive and respiratory syndrome viruses (PRRSV) show high genetic differences both among and within genotypes. Recently, several highly pathogenic PRRSV (HP-PRRSV) strains have been described. This study compares and characterizes the production of cytokines by pulmonary macrophages in pigs experimentally infected with four different PRRSV-1 strains: two low-virulent strains, Lelystad (LV) and a British field strain (215-06); a HP strain (SU1-bel) from Belarus and the attenuated vaccine strain DV (Porcilis(®) PRRS). Animals were clinically monitored and post-mortem examinations were performed at 3, 7 and 35 days post-infection (dpi). Lung samples were processed for histopathological and immunohistochemical studies by using specific antibodies against PRRSV, IL1-α, IL-6, TNF-α, IL-10 and IFN-γ. SU1-bel infected animals presented the highest mean scores for clinical observations, gross and microscopic lesions as well as for PRRSV expression compared with the other infected groups (p≤0.027). These animals displayed the highest expression of IL1-α at 7dpi, together with the highest score for lung pathology, whereas LV, 215-06 and DV inoculated animals only showed a transient enhancement in some of these cytokines. SU1-bel-infected pigs showed a positive correlation between the amount of PRRSV antigen and IL-1α expression (r=0.645, p<0.001). The highest expression of IL-10 was detected in 215-06-infected animals (p≤0.004), with a positive correlation with the numbers of virus-infected cells (r=0.375, p≤0.013). In conclusion, the HP-PRRSV SU1-bel strain replicated more efficiently in the lung of infected animals and induced a higher expression of IL-1α than the other PRRSV-1-infected groups, which may have played a key role in the onset of the clinical signs and interstitial pneumonia.
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Affiliation(s)
- Shyrley P Amarilla
- Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Campus Universitario de Rabanales, 'International Excellence Agrifood Campus, CeiA3', 14071 Cordoba, Spain.
| | | | - Librado Carrasco
- Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Campus Universitario de Rabanales, 'International Excellence Agrifood Campus, CeiA3', 14071 Cordoba, Spain
| | - Irene M Rodríguez-Gómez
- Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Campus Universitario de Rabanales, 'International Excellence Agrifood Campus, CeiA3', 14071 Cordoba, Spain
| | - José M Caridad Y Ocerín
- Department of Statistics, Econometrics, Operations Research, Business Organization and Applied Economics, Faculty of Law and Economics, 14071 Cordoba, Spain
| | - Sophie B Morgan
- Department of Virology, Animal Health and Veterinary Laboratories Agency-Weybridge, Addlestone, Surrey KT15 3NB, UK
| | - Simon P Graham
- Department of Virology, Animal Health and Veterinary Laboratories Agency-Weybridge, Addlestone, Surrey KT15 3NB, UK
| | - Jean-Pierre Frossard
- Department of Virology, Animal Health and Veterinary Laboratories Agency-Weybridge, Addlestone, Surrey KT15 3NB, UK
| | - Trevor W Drew
- Department of Virology, Animal Health and Veterinary Laboratories Agency-Weybridge, Addlestone, Surrey KT15 3NB, UK
| | - Francisco J Salguero
- Department of Virology, Animal Health and Veterinary Laboratories Agency-Weybridge, Addlestone, Surrey KT15 3NB, UK; Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford GU2 7TE, UK
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46
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Morgan SB, Frossard JP, Pallares FJ, Gough J, Stadejek T, Graham SP, Steinbach F, Drew TW, Salguero FJ. Pathology and Virus Distribution in the Lung and Lymphoid Tissues of Pigs Experimentally Inoculated with Three Distinct Type 1 PRRS Virus Isolates of Varying Pathogenicity. Transbound Emerg Dis 2014; 63:285-95. [PMID: 25382098 DOI: 10.1111/tbed.12272] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [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: 04/02/2014] [Indexed: 12/22/2022]
Abstract
Porcine reproductive and respiratory syndrome (PRRS) continues to be the most economically important disease of swine worldwide. The appearance of highly pathogenic PRRS virus (PRRSV) strains in Europe and Asia has raised concerns about this disease and initiated increased efforts to understand the pathogenesis. In this study, we have compared the pathology and the virus distribution in tissues of pigs experimentally inoculated with three different genotype 1 PRRSV isolates. Sixty 5-week-old pigs were inoculated intranasally with a) the Lelystad virus (LV), b) a field strain from the UK causing respiratory clinical signs (UK) or c) a highly pathogenic strain from Belarus (BE). Sixteen animals were mock-infected and used as controls. The animals were euthanized at 3, 7 and 35 days post-infection (dpi), and lung and lymphoid tissues collected for histopathological examination and PRRSV detection by immunohistochemistry (IHC). Histopathological lesions consisted of interstitial pneumonia with mononuclear cell infiltrates in the lungs, lymphoid depletion, apoptosis and follicular hyperplasia in the spleen, lymph nodes and tonsil and lymphoid depletion in the thymus. Porcine reproductive and respiratory syndrome virus was detected mainly in monocytes-macrophages. BE-infected animals showed the highest pathological scores and the highest presence of virus at 3 and 7 dpi, followed by the UK field strain and then LV. Moderate lesions were observed at 35 dpi with lesser detection of PRRSV by IHC in each infected group. The highly pathogenic BE strain induced more severe pathology in both lungs and lymphoid organs of pigs compared with the classic field isolate and the prototype LV. The increased severity of pathology was in correlation with the presence of a higher number of PRRSV-infected cells in the tissues.
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Affiliation(s)
- S B Morgan
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, UK.,Department of Microbial and Cellular Sciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - J P Frossard
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, UK
| | - F J Pallares
- Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Murcia University, Murcia, Spain.,Department of Pathology, Animal Health and Veterinary Laboratories Agency, Addlestone, UK
| | - J Gough
- Department of Pathology, Animal Health and Veterinary Laboratories Agency, Addlestone, UK
| | - T Stadejek
- Faculty of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, Poland
| | - S P Graham
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, UK
| | - F Steinbach
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, UK
| | - T W Drew
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, UK
| | - F J Salguero
- Department of Pathology, Animal Health and Veterinary Laboratories Agency, Addlestone, UK.,School of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
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47
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Mokhtar H, Eck M, Morgan SB, Essler SE, Frossard JP, Ruggli N, Graham SP. Proteome-wide screening of the European porcine reproductive and respiratory syndrome virus reveals a broad range of T cell antigen reactivity. Vaccine 2014; 32:6828-37. [DOI: 10.1016/j.vaccine.2014.04.054] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 04/11/2014] [Accepted: 04/17/2014] [Indexed: 01/06/2023]
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48
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Forberg H, Hauge AG, Valheim M, Garcon F, Nunez A, Gerner W, Mair KH, Graham SP, Brookes SM, Storset AK. Early responses of natural killer cells in pigs experimentally infected with 2009 pandemic H1N1 influenza A virus. PLoS One 2014; 9:e100619. [PMID: 24955764 PMCID: PMC4067341 DOI: 10.1371/journal.pone.0100619] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 05/29/2014] [Indexed: 12/21/2022] Open
Abstract
Natural killer (NK) cells are important players in the innate immune response against influenza A virus and the activating receptor NKp46, which binds hemagglutinin on the surface of infected cells, has been assigned a role in this context. As pigs are natural hosts for influenza A viruses and pigs possess both NKp46− and NKp46+ NK cells, they represent a good animal model for studying the role of the NKp46 receptor during influenza. We explored the role of NK cells in piglets experimentally infected with 2009 pandemic H1N1 influenza virus by flow cytometric analyses of cells isolated from blood and lung tissue and by immunostaining of lung tissue sections. The number of NKp46+ NK cells was reduced while NKp46− NK cells remained unaltered in the blood 1–3 days after infection. In the lungs, the intensity of NKp46 expression on NK cells was increased during the first 3 days, and areas where influenza virus nucleoprotein was detected were associated with increased numbers of NKp46+ NK cells when compared to uninfected areas. NKp46+ NK cells in the lung were neither found to be infected with influenza virus nor to be undergoing apoptosis. The binding of porcine NKp46 to influenza virus infected cells was verified in an in vitro assay. These data support the involvement of porcine NKp46+ NK cells in the local immune response against influenza virus.
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Affiliation(s)
- Hilde Forberg
- Department of Laboratory Services, Norwegian Veterinary Institute, Oslo, Norway
- * E-mail:
| | - Anna G. Hauge
- Department of Laboratory Services, Norwegian Veterinary Institute, Oslo, Norway
| | - Mette Valheim
- Department of Laboratory Services, Norwegian Veterinary Institute, Oslo, Norway
| | - Fanny Garcon
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, United Kingdom
| | - Alejandro Nunez
- Pathology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, United Kingdom
| | - Wilhelm Gerner
- Department of Pathobiology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Kerstin H. Mair
- Department of Pathobiology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Simon P. Graham
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, United Kingdom
| | - Sharon M. Brookes
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, United Kingdom
| | - Anne K. Storset
- Department of Food Safety and Infection Biology, Norwegian University of Life Sciences, Oslo, Norway
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Franzoni G, Kurkure NV, Essler SE, Pedrera M, Everett HE, Bodman-Smith KB, Crooke HR, Graham SP. Proteome-wide screening reveals immunodominance in the CD8 T cell response against classical swine fever virus with antigen-specificity dependent on MHC class I haplotype expression. PLoS One 2013; 8:e84246. [PMID: 24376799 PMCID: PMC3871537 DOI: 10.1371/journal.pone.0084246] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 11/13/2013] [Indexed: 12/19/2022] Open
Abstract
Vaccination with live attenuated classical swine fever virus (CSFV) vaccines induces a rapid onset of protection which has been associated with virus-specific CD8 T cell IFN-γ responses. In this study, we assessed the specificity of this response, by screening a peptide library spanning the CSFV C-strain vaccine polyprotein to identify and characterise CD8 T cell epitopes. Synthetic peptides were pooled to represent each of the 12 CSFV proteins and used to stimulate PBMC from four pigs rendered immune to CSFV by C-strain vaccination and subsequently challenged with the virulent Brescia strain. Significant IFN-γ expression by CD8 T cells, assessed by flow cytometry, was induced by peptide pools representing the core, E2, NS2, NS3 and NS5A proteins. Dissection of these antigenic peptide pools indicated that, in each instance, a single discrete antigenic peptide or pair of overlapping peptides was responsible for the IFN-γ induction. Screening and titration of antigenic peptides or truncated derivatives identified the following antigenic regions: core₂₄₁₋₂₅₅ PESRKKLEKALLAWA and NS3₁₉₀₂₋₁₉₁₂ VEYSFIFLDEY, or minimal length antigenic peptides: E2₉₉₆₋₁₀₀₃ YEPRDSYF, NS2₁₂₂₃₋₁₂₃₀ STVTGIFL and NS5A₃₀₇₀₋₃₀₇₈ RVDNALLKF. The epitopes are highly conserved across CSFV strains and variable sequence divergence was observed with related pestiviruses. Characterisation of epitope-specific CD8 T cells revealed evidence of cytotoxicity, as determined by CD107a mobilisation, and a significant proportion expressed TNF-α in addition to IFN-γ. Finally, the variability in the antigen-specificity of these immunodominant CD8 T cell responses was confirmed to be associated with expression of distinct MHC class I haplotypes. Moreover, recognition of NS₁₂₂₃₋₁₂₃₀ STVTGIFL and NS3₁₉₀₂₋₁₉₁₂ VEYSFIFLDEY by a larger group of C-strain vaccinated animals showed that these peptides could be restricted by additional haplotypes. Thus the antigenic regions and epitopes identified represent attractive targets for evaluation of their vaccine potential against CSFV.
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Affiliation(s)
- Giulia Franzoni
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, United Kingdom
- Department of Microbial & Cellular Sciences, University of Surrey, Guildford, United Kingdom
| | - Nitin V. Kurkure
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, United Kingdom
- Nagpur Veterinary College, Maharashtra Animal & Fishery Sciences University, Nagpur, India
| | - Sabine E. Essler
- Department of Pathobiology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Miriam Pedrera
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, United Kingdom
| | - Helen E. Everett
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, United Kingdom
| | - Kikki B. Bodman-Smith
- Department of Microbial & Cellular Sciences, University of Surrey, Guildford, United Kingdom
| | - Helen R. Crooke
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, United Kingdom
| | - Simon P. Graham
- Virology Department, Animal Health and Veterinary Laboratories Agency, Addlestone, United Kingdom
- * E-mail:
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50
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Londt BZ, Brookes SM, Nash BJ, Núñez A, Kelly MD, Garçon F, Graham SP, Brown IH. Enhanced infectivity of H5N1 highly pathogenic avian influenza (HPAI) virus in pig ex vivo respiratory tract organ cultures following adaptation by in vitro passage. Virus Res 2013; 178:383-91. [PMID: 24050997 DOI: 10.1016/j.virusres.2013.09.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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: 03/19/2013] [Revised: 09/05/2013] [Accepted: 09/06/2013] [Indexed: 11/29/2022]
Abstract
Pigs are thought to play a role in the adaptation of avian influenza (AI) viruses to mammalian hosts. To better understand this mechanism and to identify key mutations two highly pathogenic AI (HPAI) viruses (H5N1 and H7N7) were grown in pig cells, To mimic the pressure of an immune response, these viruses were grown in the presence of antiserum to the homologous virus or porcine IFN-γ. Mutations were identified in both viruses grown in vitro in the presence and absence of antisera or IFN-γ and included the PB2 mutations, E627K or 627E,D701N, described previously as requirements for the adaptation of AI viruses to mammalian species. Additional mutations were also identified in PB1, HA, NP and M genes for viruses passaged in the presence of immune pressure. The infectivity of these viruses was then assessed using ex vivo pig bronchi and lung organ cultures. For lung explants, higher levels of virus were detected in organ cultures infected with H5N1 HPAI viruses passaged in pig cell lines regardless of the presence or absence of homologous antisera or IFN-γ when compared with the wild-type parental viruses. No infection was observed for any of the H7N7 HPAI viruses. These results suggest that the mutations identified in H5N1 HPAI viruses may provide a replication or infection advantage in pigs in vivo and that pigs may continue to play an important role in the ecology of influenza A viruses including those of avian origin.
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Affiliation(s)
- Brandon Z Londt
- Animal Health and Veterinary Laboratories Agency (AHVLA), Addlestone, Surrey KT15 3NB, United Kingdom.
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