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Abstract
The different technology platforms used to make poultry vaccines are reviewed. Vaccines based on classical technologies are either live attenuated or inactivated vaccines. Genetic engineering is applied to design by deletion, mutation, insertion, or chimerization, genetically modified target microorganisms that are used either as live or inactivated vaccines. Other vaccine platforms are based on one or a few genes of the target pathogen agent coding for proteins that can induce a protective immune response ("protective genes"). These genes can be expressed in vitro to produce subunit vaccines. Alternatively, vectors carrying these genes in their genome or nucleic acid-based vaccines will induce protection by in vivo expression of these genes in the vaccinated host. Properties of these different types of vaccines, including advantages and limitations, are reviewed, focusing mainly on vaccines targeting viral diseases and on technologies that succeeded in market authorization.
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Alharbi NK, Aljamaan F, Aljami HA, Alenazi MW, Albalawi H, Almasoud A, Alharthi FJ, Azhar EI, Barhoumi T, Bosaeed M, Gilbert SC, Hashem AM. Immunogenicity of High-Dose MVA-Based MERS Vaccine Candidate in Mice and Camels. Vaccines (Basel) 2022; 10:vaccines10081330. [PMID: 36016218 PMCID: PMC9413082 DOI: 10.3390/vaccines10081330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 08/12/2022] [Accepted: 08/15/2022] [Indexed: 11/16/2022] Open
Abstract
The Middle East respiratory syndrome coronavirus (MERS-CoV) is a zoonotic pathogen that can transmit from dromedary camels to humans, causing severe pneumonia, with a 35% mortality rate. Vaccine candidates have been developed and tested in mice, camels, and humans. Previously, we developed a vaccine based on the modified vaccinia virus Ankara (MVA) viral vector, encoding a full-length spike protein of MERS-CoV, MVA-MERS. Here, we report the immunogenicity of high-dose MVA-MERS in prime–boost vaccinations in mice and camels. Methods: Three groups of mice were immunised with MVA wild-type (MVA-wt) and MVA-MERS (MVA-wt/MVA-MERS), MVA-MERS/MVA-wt, or MVA-MERS/MVA-MERS. Camels were immunised with two doses of PBS, MVA-wt, or MVA-MERS. Antibody (Ab) responses were evaluated using ELISA and MERS pseudovirus neutralisation assays. Results: Two high doses of MVA-MERS induced strong Ab responses in both mice and camels, including neutralising antibodies. Anti-MVA Ab responses did not affect the immune responses to the vaccine antigen (MERS-CoV spike). Conclusions: MVA-MERS vaccine, administered in a homologous prime–boost regimen, induced high levels of neutralising anti-MERS-CoV antibodies in mice and camels. This could be considered for further development and evaluation as a dromedary vaccine to reduce MERS-CoV transmission to humans.
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Affiliation(s)
- Naif Khalaf Alharbi
- Vaccine Development Unit, King Abdullah International Medical Research Center, Riyadh 11481, Saudi Arabia
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh 14611, Saudi Arabia
- Correspondence:
| | - Fahad Aljamaan
- Animal Facilities, King Abdullah International Medical Research Center, Riyadh 11481, Saudi Arabia
| | - Haya A. Aljami
- Vaccine Development Unit, King Abdullah International Medical Research Center, Riyadh 11481, Saudi Arabia
| | - Mohammed W. Alenazi
- Vaccine Development Unit, King Abdullah International Medical Research Center, Riyadh 11481, Saudi Arabia
| | - Hind Albalawi
- Vaccine Development Unit, King Abdullah International Medical Research Center, Riyadh 11481, Saudi Arabia
| | - Abdulrahman Almasoud
- Vaccine Development Unit, King Abdullah International Medical Research Center, Riyadh 11481, Saudi Arabia
| | - Fatima J. Alharthi
- Vaccine Development Unit, King Abdullah International Medical Research Center, Riyadh 11481, Saudi Arabia
| | - Esam I. Azhar
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 22254, Saudi Arabia
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 22254, Saudi Arabia
| | - Tlili Barhoumi
- Vaccine Development Unit, King Abdullah International Medical Research Center, Riyadh 11481, Saudi Arabia
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh 14611, Saudi Arabia
| | - Mohammad Bosaeed
- Vaccine Development Unit, King Abdullah International Medical Research Center, Riyadh 11481, Saudi Arabia
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh 14611, Saudi Arabia
- Department of Medicine, King Abdulaziz Medical City, Riyadh 12746, Saudi Arabia
| | | | - Anwar M. Hashem
- Department of Medical Microbiology and Parasitology, Faculty of Medicine, King Abdulaziz University, Jeddah 22254, Saudi Arabia
- Vaccines and Immunotherapy Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 22254, Saudi Arabia
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Hu Z, Jiang W, Gu L, Qiao D, Shu T, Lowrie DB, Lu SH, Fan XY. Heterologous prime-boost vaccination against tuberculosis with recombinant Sendai virus and DNA vaccines. J Mol Med (Berl) 2019; 97:1685-1694. [PMID: 31786669 DOI: 10.1007/s00109-019-01844-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 08/22/2019] [Accepted: 10/05/2019] [Indexed: 11/30/2022]
Abstract
In an earlier study, a novel Sendai virus-vectored anti-tuberculosis vaccine encoding Ag85A and Ag85B (SeV85AB) was constructed and shown to elicit antigen-specific T cell responses and protection against Mycobacterium tuberculosis (Mtb) infection in a murine model. In this study, we evaluate whether the immune responses induced by this novel vaccine might be elevated by a recombinant DNA vaccine expressing the same antigen in a heterologous prime-boost vaccination strategy. The results showed that both SeV85AB prime-DNA boost (SeV85AB-DNA) and DNA prime-SeV85AB boost (DNA-SeV85AB) vaccination strategies significantly enhanced the antigen-specific T cell responses induced by the separate vaccines. The SeV85AB-DNA immunization regimen induced higher levels of recall T cell responses after Mtb infection and conferred better immune protection compared with DNA-SeV85AB or a single immunization. Collectively, our study lends strong evidence that a DNA vaccine boost might be included in a novel SeV85AB immunization strategy designed to enhance the immune protection against Mtb. KEY MESSAGES: A heterologous prime-boost regimen with a novel recombinant SeV85AB and a DNA vaccine increase the T cell responses above those from a single vaccine. The heterologous prime-boost regimen provided protection against Mtb infection. The DNA vaccine might be included in a novel SeV85AB immunization strategy designed to enhance the immune protection against Mtb.
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Affiliation(s)
- Zhidong Hu
- Shanghai Public Health Clinical Center, Key Laboratory of Medical Molecular Virology of MOE/MOH, Fudan University, Shanghai, 201508, China
| | - Weimin Jiang
- Departments of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Ling Gu
- Shanghai Public Health Clinical Center, Key Laboratory of Medical Molecular Virology of MOE/MOH, Fudan University, Shanghai, 201508, China.,School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, 325000, China.,TB Center, Shanghai Emerging and Re-emerging Institute, Shanghai, 201508, China
| | - Dan Qiao
- Ruijin Hospital (North), Shanghai Jiaotong University, Shanghai, 201801, China
| | | | - Douglas B Lowrie
- Shanghai Public Health Clinical Center, Key Laboratory of Medical Molecular Virology of MOE/MOH, Fudan University, Shanghai, 201508, China.,TB Center, Shanghai Emerging and Re-emerging Institute, Shanghai, 201508, China
| | - Shui-Hua Lu
- Shanghai Public Health Clinical Center, Key Laboratory of Medical Molecular Virology of MOE/MOH, Fudan University, Shanghai, 201508, China. .,School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, 325000, China. .,TB Center, Shanghai Emerging and Re-emerging Institute, Shanghai, 201508, China.
| | - Xiao-Yong Fan
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, 325000, China. .,TB Center, Shanghai Emerging and Re-emerging Institute, Shanghai, 201508, China.
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Pence BD, Ryerson MR, Bravo Cruz AG, Woods JA, Shisler JL. Voluntary Wheel Running Does Not Alter Mortality to or Immunogenicity of Vaccinia Virus in Mice: A Pilot Study. Front Physiol 2018; 8:1123. [PMID: 29354074 PMCID: PMC5760534 DOI: 10.3389/fphys.2017.01123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 12/19/2017] [Indexed: 01/26/2023] Open
Abstract
Exercise has been shown to improve immune responses to viral infections and vaccines in several mouse models. However, previous pathogen studies have primarily used infections limited to the respiratory tract. Additionally, previous studies have utilized forced treadmill exercise paradigms, and voluntary wheel running (VWR) has been shown to have differential effects on the immune system in non-infection models. We examined whether VWR could improve morbidity and mortality to a 50% lethal dose of vaccinia virus (VACV), a systemic pathogen commonly used to examine immune responses. Additionally, we examined whether VWR could improve antibody response to a replication-deficient strain of VACV, mimicking a vaccination. Male C57Bl/6J mice underwent 8 weeks of VWR or remained sedentary, then were infected intranasally with 105 PFU VACV strain WR and followed 14 days for weight loss. Mice in the vaccination study ran or were sedentary for 8 weeks, then were given 106 PFU of replication-deficient VACV strain MVA intraperitoneally. Blood was collected at 1, 2, and 4 weeks post-inoculation, and anti-VACV IgG titer was determined by ELISA. VWR did not improve mortality due to VACV infection (p = 0.26), although fewer VWR mice (4/10) died compared to sedentary (SED, 6/10). VWR did not prevent body weight loss due to infection compared to SED (p = 0.20), although VWR mice loss slightly less weight compared to SED through the first 6 days post-infection. Food intake was significantly reduced in SED post-infection compared to VWR (p = 0.05). VWR mice developed a greater IgG antibody response, although this was not significant (p = 0.22). In summary, VWR did not protect against mortality to VACV or prevent infection-induced weight loss, and VWR did not enhance antibody responses. However, there were non-significant trends toward VWR-related improvements in these outcomes, and post-infection food intake was improved by VWR.
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Affiliation(s)
- Brandt D Pence
- School of Health Studies, University of Memphis, Memphis, TN, United States.,Center for Nutraceutical and Dietary Supplement Research, University of Memphis, Memphis, TN, United States.,Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States.,Integrative Immunology and Behavior Program, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Melissa R Ryerson
- Department of Microbiology, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Ariana G Bravo Cruz
- Department of Microbiology, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Jeffrey A Woods
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States.,Integrative Immunology and Behavior Program, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Joanna L Shisler
- Department of Microbiology, University of Illinois Urbana-Champaign, Urbana, IL, United States
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Offerman K, Deffur A, Carulei O, Wilkinson R, Douglass N, Williamson AL. Six host-range restricted poxviruses from three genera induce distinct gene expression profiles in an in vivo mouse model. BMC Genomics 2015; 16:510. [PMID: 26153454 PMCID: PMC4495948 DOI: 10.1186/s12864-015-1659-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Accepted: 05/28/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Host-range restricted poxviruses make promising vaccine vectors due to their safety profile and immunogenicity. An understanding of the host innate immune responses produced by different poxvirus vectors would aid in the assessment, selection and rational design of improved vaccines for human and veterinary applications. Novel avipoxviruses are being assessed to determine if they are different from other poxvirus vectors. Analysis of the transcriptome induced in a mouse model would aid in determining if there were significant differences between different poxvirus vectors which may reflect different adjuvant potential as well as establish if they should be further evaluated as vaccine vectors. RESULTS We compared host transcript abundance in the spleens of BALB/c mice twenty four hours after intravenous infection (10(5) pfu/mouse) with six host-restricted poxvirus species from three genera, namely Lumpy Skin Disease virus (LSDV), Canarypox virus (CNPV), Fowlpox virus (FWPV), modified vaccinia Ankara (MVA) and two novel South African avipoxviruses, Feral Pigeonpox virus (FeP2) and Penguinpox virus (PEPV). These six viruses produced qualitatively and quantitatively distinct host responses with LSDV, followed by MVA, inducing the greatest interferon (IFN) response. FeP2 and PEPV caused very little change to host transcript abundance compared to the other 4 viruses tested. CNPV and FWPV induced the up regulation of two immunoglobulin genes (Ighg and Ighg3 (IgG3)) with CNPV inducing a third, Ighm (IgM). HIV-1-specific IgG3 antibodies have been correlated with decreased risk of HIV-1 infection in the RV144 trial, which included a CNPV-based vector (Yates et al. (Sci Transl Med, 6(228) p228, 2014). Up regulation of IgG3 by CNPV and FWPV but not the other poxviruses tested in vivo, implies that these two avipoxvirus-vector backbones may be involved in stimulation of the clinically important IgG3 antibody subclass. Differential transcript abundance associated with the different poxviruses is further discussed with particular emphasis on responses related to immune responses. CONCLUSION Six, genetically diverse host-restricted poxviruses produce different responses in a mouse model early after infection. These differences may affect the immune response induced to vaccine antigen in vectors based on these viruses. The two novel avipoxviruses were clearly distinguishable from the other viruses.
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Affiliation(s)
- Kristy Offerman
- Division of Medical Virology, Department of Clinical Laboratory Sciences, University of Cape Town, Cape Town, South Africa. .,Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.
| | - Armin Deffur
- Clinical Infectious Diseases Research Initiative, University of Cape Town, Cape Town, South Africa. .,Department of Medicine, University of Cape Town, Cape Town, South Africa.
| | - Olivia Carulei
- Division of Medical Virology, Department of Clinical Laboratory Sciences, University of Cape Town, Cape Town, South Africa. .,Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.
| | - Robert Wilkinson
- Clinical Infectious Diseases Research Initiative, University of Cape Town, Cape Town, South Africa. .,Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa. .,The Francis Crick Institute Mill Hill Laboratory, London, NW7 1AA, UK. .,Department of Medicine, Imperial College, London, W2 1PG, UK.
| | - Nicola Douglass
- Division of Medical Virology, Department of Clinical Laboratory Sciences, University of Cape Town, Cape Town, South Africa. .,Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.
| | - Anna-Lise Williamson
- Division of Medical Virology, Department of Clinical Laboratory Sciences, University of Cape Town, Cape Town, South Africa. .,Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa. .,National Health Laboratory Service, Groote Schuur Hospital, Cape Town, South Africa.
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Alharbi NK, Spencer AJ, Hill AVS, Gilbert SC. Deletion of Fifteen Open Reading Frames from Modified Vaccinia Virus Ankara Fails to Improve Immunogenicity. PLoS One 2015; 10:e0128626. [PMID: 26053118 PMCID: PMC4459983 DOI: 10.1371/journal.pone.0128626] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 04/29/2015] [Indexed: 12/25/2022] Open
Abstract
Modified vaccinia virus Ankara (MVA) is a highly attenuated strain of vaccinia virus, which has been used as a recombinant vaccine vector in many vaccine development programmes. The loss of many immunosuppressive and host-range genes resulted in a safe and immunogenic vaccine vector. However it still retains some immunomodulatory genes that may reduce MVA immunogenicity. Earlier reports demonstrated that the deletion of the A41L, B15R, C6L, or C12L open reading frames (ORFs) enhanced cellular immune responses in recombinant MVA (rMVA) by up to 2-fold. However, previously, we showed that deletion of the C12L, A44L, A46R, B7R, or B15R ORFs from rMVA, using MVA-BAC recombineering technology, did not enhance rMVA immunogenicity at either peak or memory cellular immune responses. Here, we extend our previous study to examine the effect of deleting clusters of genes on rMVA cellular immunogenicity. Two clusters of fifteen genes were deleted in one rMVA mutant that encodes either the 85A antigen of Mycobacterium tuberculosis or an immunodominant H2-Kd-restricted murine malaria epitope (pb9). The deletion mutants were tested in prime only or prime and boost vaccination regimens. The responses showed no improved peak or memory CD8+ T cell frequencies. Our results suggest that the reported small increases in MVA deletion mutants could not be replicated with different antigens, or epitopes. Therefore, the gene deletion strategy may not be taken as a generic approach for improving the immunogenicity of MVA-based vaccines, and should be carefully assessed for every individual recombinant antigen.
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Affiliation(s)
- Naif Khalaf Alharbi
- The Jenner Institute, University of Oxford, Oxford, OX3 7DQ, United Kingdom
- King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
| | | | - Adrian V. S. Hill
- The Jenner Institute, University of Oxford, Oxford, OX3 7DQ, United Kingdom
| | - Sarah C. Gilbert
- The Jenner Institute, University of Oxford, Oxford, OX3 7DQ, United Kingdom
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Woller N, Gürlevik E, Ureche CI, Schumacher A, Kühnel F. Oncolytic viruses as anticancer vaccines. Front Oncol 2014; 4:188. [PMID: 25101244 PMCID: PMC4104469 DOI: 10.3389/fonc.2014.00188] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 07/06/2014] [Indexed: 12/28/2022] Open
Abstract
Oncolytic virotherapy has shown impressive results in preclinical studies and first promising therapeutic outcomes in clinical trials as well. Since viruses are known for a long time as excellent vaccination agents, oncolytic viruses are now designed as novel anticancer agents combining the aspect of lysis-dependent cytoreductive activity with concomitant induction of antitumoral immune responses. Antitumoral immune activation by oncolytic virus infection of tumor tissue comprises both, immediate effects of innate immunity and also adaptive responses for long lasting antitumoral activity, which is regarded as the most prominent challenge in clinical oncology. To date, the complex effects of a viral tumor infection on the tumor microenvironment and the consequences for the tumor-infiltrating immune cell compartment are poorly understood. However, there is more and more evidence that a tumor infection by an oncolytic virus opens up a number of options for further immunomodulating interventions such as systemic chemotherapy, generic immunostimulating strategies, dendritic cell-based vaccines, and antigenic libraries to further support clinical efficacy of oncolytic virotherapy.
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Affiliation(s)
- Norman Woller
- Clinic for Gastroenterology, Hepatology and Endocrinology, Medical School Hannover , Hannover , Germany
| | - Engin Gürlevik
- Clinic for Gastroenterology, Hepatology and Endocrinology, Medical School Hannover , Hannover , Germany
| | - Cristina-Ileana Ureche
- Clinic for Gastroenterology, Hepatology and Endocrinology, Medical School Hannover , Hannover , Germany
| | - Anja Schumacher
- Clinic for Gastroenterology, Hepatology and Endocrinology, Medical School Hannover , Hannover , Germany
| | - Florian Kühnel
- Clinic for Gastroenterology, Hepatology and Endocrinology, Medical School Hannover , Hannover , Germany
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Boosting functional avidity of CD8+ T cells by vaccinia virus vaccination depends on intrinsic T-cell MyD88 expression but not the inflammatory milieu. J Virol 2014; 88:5356-68. [PMID: 24554667 DOI: 10.1128/jvi.03664-13] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED T-cell functional avidity is a crucial determinant for efficient pathogen clearance. Although recombinant DNA priming coupled with a vaccinia-vectored vaccine (VACV) boost has been widely used to mount robust CD8+ T-cell responses, how VACV boost shapes the properties of memory CD8+ T cells remains poorly defined. Here, we characterize the memory CD8+ T cells boosted by VACV and demonstrate that the intrinsic expression of MyD88 is critical for their high functional avidity. Independent of selection of clones with high-affinity T-cell receptor (TCR) or of enhanced proximal TCR signaling, the VACV boost significantly increased T-cell functional avidity through a decrease in the activation threshold. VACV-induced inflammatory milieu is not sufficient for this improvement, as simultaneous administration of the DNA vaccine and mock VACV had no effects on the functional avidity of memory CD8+ T cells. Furthermore, reciprocal adoptive transfer models revealed that the intrinsic MyD88 pathway is required for instructing the functional avidity of CD8+ T cells boosted by VACV. Taking these results together, the intrinsic MyD88 pathway is required for the high functional avidity of VACV-boosted CD8+ T cells independent of TCR selection or the VACV infection-induced MyD88-mediated inflammatory milieu. IMPORTANCE Functional avidity is one of the crucial determinants of T-cell functionality. Interestingly, although it has been demonstrated that a DNA prime-VACV boost regimen elicits high levels of T-cell functional avidity, how VACV changes the low avidity of CD8+ T cells primed by DNA into higher ones in vivo is less defined. Here, we proved that the enhancement of CD8+ T cell avidity induced by VACV boost is mediated by the intrinsic MyD88 pathway but not the MyD88-mediated inflammatory milieu, which might provide prompts in vaccine design.
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MyD88-dependent immunity to a natural model of vaccinia virus infection does not involve Toll-like receptor 2. J Virol 2014; 88:3557-67. [PMID: 24403581 DOI: 10.1128/jvi.02776-13] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED Although the pattern recognition receptor Toll-like receptor 2 (TLR2) is typically thought to recognize bacterial components, it has been described to alter the induction of both innate and adaptive immunity to a number of viruses, including vaccinia virus (VACV). However, many pathogens that reportedly encode TLR2 agonists may actually be artifactually contaminated during preparation, possibly with cellular debris or merely with molecules that sensitize cells to be activated by authentic TLR2 agonists. In both humans and mice, the most relevant natural route of infection with VACV is through intradermal infection of the skin. Therefore, we examined the requirement for TLR2 and its signaling adaptor MyD88 in protective immunity to VACV after intradermal infection. We find that although TLR2 may recognize virus preparations in vitro and have a minor role in preventing dissemination of VACV following systemic infection with large doses of virus, it is wholly disposable in both control of virus replication and induction of adaptive immunity following intradermal infection. In contrast, MyD88 is required for efficient induction of CD4 T cell and B cell responses and for local control of virus replication following intradermal infection. However, even MyD88 is not required to induce local inflammation, inflammatory cytokine production, or recruitment of cells that restrict virus from spreading systemically after peripheral infection. Thus, an effective antiviral response does require MyD88, but TLR2 is not required for control of a peripheral VACV infection. These findings emphasize the importance of studying relevant routes of infection when examining innate sensing mechanisms. IMPORTANCE Vaccinia virus (VACV) provides the backbone for some of the most widely used and successful viral vaccine vectors and is also related to the human pathogens Cantagalo virus and molluscum contagiosum virus that infect the skin of patients. Therefore, it is vital to understand the mechanisms that induce a strong innate immune response to the virus following dermal infection. Here, we compare the ability of the innate sensing molecule Toll-like receptor 2 (TLR2) and the signaling molecule MyD88 to influence the innate and adaptive immune response to VACV following systemic or dermal infection.
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Howley PM, Diener KR, Hayball JD. Making an avipoxvirus encoding a tumor-associated antigen and a costimulatory molecule. Methods Mol Biol 2014; 1139:407-427. [PMID: 24619696 DOI: 10.1007/978-1-4939-0345-0_32] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Fowlpox virus (FPV) is a double-stranded DNA virus with a history of use as a live attenuated vaccine in commercial poultry production systems. FPV is also highly amenable to genetic engineering, with a large cloning capacity and many nonessential sites available for integration, meaning that in recombinant form, several transgenes can be expressed simultaneously. Recombinant FPV has proven an effective prophylactic vaccine vector for other diseases of birds, as well as other animal species (Brun et al., Vaccine 26:6508-6528, 2008). These vectors do not integrate into the host genome nor do they undergo productive replication in mammalian cells; thus they have a proven and impeccable safety profile and have been progressed as prophylactic and therapeutic vaccine vectors for use in humans (Beukema et al., Expert Rev Vaccines 5:565-577, 2006; Lousberg et al., Expert Rev Vaccines 10:1435-1449, 2011). Furthermore, repeated immunization with FPV does not blunt subsequent vaccine responses, presumably because it is replication-defective, and thus larger doses can be routinely administered (Brun et al., Vaccine 26:6508-6528, 2008). This strengthens the case for FPV as a viable platform vaccine vector, as it means it can be used repeatedly in an individual to achieve different immunological outcomes. Here we describe in detail the construction of a recombinant variant of FPV expressing the prostate tumor-associated antigen prostatic acid phosphatase (PAP) in conjunction with the immunostimulatory cytokine, interleukin-2 (IL-2), which, if undertaken under the appropriate regulatory conditions and with approvals in place, would theoretically be amenable to clinical trial applications.
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11
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Matsumiya M, Stylianou E, Griffiths K, Lang Z, Meyer J, Harris SA, Rowland R, Minassian AM, Pathan AA, Fletcher H, McShane H. Roles for Treg expansion and HMGB1 signaling through the TLR1-2-6 axis in determining the magnitude of the antigen-specific immune response to MVA85A. PLoS One 2013; 8:e67922. [PMID: 23844129 PMCID: PMC3700883 DOI: 10.1371/journal.pone.0067922] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 05/22/2013] [Indexed: 12/29/2022] Open
Abstract
A better understanding of the relationships between vaccine, immunogenicity and protection from disease would greatly facilitate vaccine development. Modified vaccinia virus Ankara expressing antigen 85A (MVA85A) is a novel tuberculosis vaccine candidate designed to enhance responses induced by BCG. Antigen-specific interferon-γ (IFN-γ) production is greatly enhanced by MVA85A, however the variability between healthy individuals is extensive. In this study we have sought to characterize the early changes in gene expression in humans following vaccination with MVA85A and relate these to long-term immunogenicity. Two days post-vaccination, MVA85A induces a strong interferon and inflammatory response. Separating volunteers into high and low responders on the basis of T cell responses to 85A peptides measured during the trial, an expansion of circulating CD4+ CD25+ Foxp3+ cells is seen in low but not high responders. Additionally, high levels of Toll-like Receptor (TLR) 1 on day of vaccination are associated with an increased response to antigen 85A. In a classification model, combined expression levels of TLR1, TICAM2 and CD14 on day of vaccination and CTLA4 and IL2Rα two days post-vaccination can classify high and low responders with over 80% accuracy. Furthermore, administering MVA85A in mice with anti-TLR2 antibodies may abrogate high responses, and neutralising antibodies to TLRs 1, 2 or 6 or HMGB1 decrease CXCL2 production during in vitro stimulation with MVA85A. HMGB1 is released into the supernatant following atimulation with MVA85A and we propose this signal may be the trigger activating the TLR pathway. This study suggests an important role for an endogenous ligand in innate sensing of MVA and demonstrates the importance of pattern recognition receptors and regulatory T cell responses in determining the magnitude of the antigen specific immune response to vaccination with MVA85A in humans.
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Affiliation(s)
- Magali Matsumiya
- The Jenner Institute, University of Oxford, Oxford, United Kingdom.
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Hollenbaugh JA, Gee P, Baker J, Daly MB, Amie SM, Tate J, Kasai N, Kanemura Y, Kim DH, Ward BM, Koyanagi Y, Kim B. Host factor SAMHD1 restricts DNA viruses in non-dividing myeloid cells. PLoS Pathog 2013; 9:e1003481. [PMID: 23825958 PMCID: PMC3694861 DOI: 10.1371/journal.ppat.1003481] [Citation(s) in RCA: 133] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Accepted: 05/22/2013] [Indexed: 01/01/2023] Open
Abstract
SAMHD1 is a newly identified anti-HIV host factor that has a dNTP triphosphohydrolase activity and depletes intracellular dNTP pools in non-dividing myeloid cells. Since DNA viruses utilize cellular dNTPs, we investigated whether SAMHD1 limits the replication of DNA viruses in non-dividing myeloid target cells. Indeed, two double stranded DNA viruses, vaccinia and herpes simplex virus type 1, are subject to SAMHD1 restriction in non-dividing target cells in a dNTP dependent manner. Using a thymidine kinase deficient strain of vaccinia virus, we demonstrate a greater restriction of viral replication in non-dividing cells expressing SAMHD1. Therefore, this study suggests that SAMHD1 is a potential innate anti-viral player that suppresses the replication of a wide range of DNA viruses, as well as retroviruses, which infect non-dividing myeloid cells. Various viral pathogens such as HIV-1, herpes simplex virus (HSV) and vaccinia virus infect terminally-differentiated/non-dividing macrophages during the course of viral pathogenesis. Unlike dividing cells, non-dividing cells lack chromosomal DNA replication, do not enter the cell cycle, and harbor very low levels of cellular dNTPs, which are substrates of viral DNA polymerases. A series of recent studies revealed that the host protein SAMHD1 is dNTP triphosphohydrolase, which contributes to the poor dNTP abundance in non-dividing myeloid cells, and restricts proviral DNA synthesis of HIV-1 and other lentiviruses in macrophages, dendritic cells, and resting T cells. In this report, we demonstrate that SAMHD1 also controls the replication of large dsDNA viruses: vaccinia virus and HSV-1, in primary human monocyte-derived macrophages. SAMHD1 suppresses the replication of these DNA viruses to an even greater extent in the absence of viral genes that are involved in dNTP metabolism such as thymidine kinase. Therefore, this study supports that dsDNA viruses evolved to express enzymes necessary to increase the levels of dNTPs as a mechanism to overcome the restriction induced by SAMHD1 in myeloid cells.
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Affiliation(s)
- Joseph A. Hollenbaugh
- Department of Microbiology and Immunology, University of Rochester, Rochester, New York, United States of America
- Center for Drug Discovery, The Department of Pediatrics, Emory University, Atlanta, Georgia, United States of America
| | - Peter Gee
- Laboratory of Viral Pathogenesis, Institute for Virus Research, Kyoto University, Kyoto, Japan
| | - Jonathon Baker
- Department of Microbiology and Immunology, University of Rochester, Rochester, New York, United States of America
| | - Michele B. Daly
- Department of Microbiology and Immunology, University of Rochester, Rochester, New York, United States of America
- Center for Drug Discovery, The Department of Pediatrics, Emory University, Atlanta, Georgia, United States of America
| | - Sarah M. Amie
- Department of Microbiology and Immunology, University of Rochester, Rochester, New York, United States of America
| | - Jessica Tate
- Department of Microbiology and Immunology, University of Rochester, Rochester, New York, United States of America
| | - Natsumi Kasai
- Laboratory of Viral Pathogenesis, Institute for Virus Research, Kyoto University, Kyoto, Japan
| | - Yuka Kanemura
- Laboratory of Viral Pathogenesis, Institute for Virus Research, Kyoto University, Kyoto, Japan
| | - Dong-Hyun Kim
- Department of Pharmacy, Kyung-Hee University, Seoul, South Korea
| | - Brian M. Ward
- Department of Microbiology and Immunology, University of Rochester, Rochester, New York, United States of America
- * E-mail: (BW); (YK); (BK)
| | - Yoshio Koyanagi
- Laboratory of Viral Pathogenesis, Institute for Virus Research, Kyoto University, Kyoto, Japan
- * E-mail: (BW); (YK); (BK)
| | - Baek Kim
- Department of Microbiology and Immunology, University of Rochester, Rochester, New York, United States of America
- Center for Drug Discovery, The Department of Pediatrics, Emory University, Atlanta, Georgia, United States of America
- Department of Pharmacy, Kyung-Hee University, Seoul, South Korea
- * E-mail: (BW); (YK); (BK)
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13
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Mendes ÉA, Fonseca FG, Casério BM, Colina JP, Gazzinelli RT, Caetano BC. Recombinant vaccines against T. gondii: comparison between homologous and heterologous vaccination protocols using two viral vectors expressing SAG1. PLoS One 2013; 8:e63201. [PMID: 23690999 PMCID: PMC3654925 DOI: 10.1371/journal.pone.0063201] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Accepted: 04/03/2013] [Indexed: 11/19/2022] Open
Abstract
The use of recombinant viral vectors expressing T. gondii antigens is a safe and efficient approach to induce immune response against the parasite and a valuable tool for vaccine development. We have previously protected mice from toxoplasmosis by immunizing the animals with an adenovirus expressing the protein SAG1 (AdSAG1) of T. gondii. We are now looking for ways to improve the vaccination strategy and enhance protection. One limitation of homologous vaccinations (sequential doses of the same vector) is induction of anti-vector immune response that blocks cell transduction, restricts transgene expression and, consequently, compromises the overall outcome of vaccination. One way to avert the effects of anti-vector response is to use different viruses in prime and boost (heterologous vaccination). Bearing this in mind, we generated a modified Vaccinia Virus Ankara encoding SAG1 (MVASAG1), to be tested as boost agent after prime with AdSAG1. Although minor differences were observed in the magnitude of the anti-SAG1 immune response induced by each vaccination protocol, the heterologous immunization with AdSAG1 followed by MVASAG1 resulted in improved capacity to control brain cyst formation in a model of chronic toxoplasmosis in C57BL/6 mice.
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Affiliation(s)
- Érica Araújo Mendes
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Flavio G. Fonseca
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Bárbara M. Casério
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Janaína P. Colina
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ricardo Tostes Gazzinelli
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
- Division of Infectious Disease and Immunology, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
- * E-mail: (RTG); (BCC)
| | - Braulia C. Caetano
- Division of Infectious Disease and Immunology, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
- * E-mail: (RTG); (BCC)
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14
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Abstract
Infectious diseases are responsible for an overwhelming number of deaths worldwide and their clinical management is often hampered by the emergence of multi-drug-resistant strains. Therefore, prevention through vaccination currently represents the best course of action to combat them. However, immune escape and evasion by pathogens often render vaccine development difficult. Furthermore, most currently available vaccines were empirically designed. In this review, we discuss why rational design of vaccines is not only desirable but also necessary. We introduce recent developments towards specifically tailored antigens, adjuvants, and delivery systems, and discuss the methodological gaps and lack of knowledge still hampering true rational vaccine design. Finally, we address the potential and limitations of different strategies and technologies for advancing vaccine development.
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Affiliation(s)
- Christine Rueckert
- Department of Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Carlos A. Guzmán
- Department of Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Braunschweig, Germany
- * E-mail:
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