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Fulber JPC, Kamen AA. Development and Scalable Production of Newcastle Disease Virus-Vectored Vaccines for Human and Veterinary Use. Viruses 2022; 14:975. [PMID: 35632717 PMCID: PMC9143368 DOI: 10.3390/v14050975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/29/2022] [Accepted: 05/02/2022] [Indexed: 11/16/2022] Open
Abstract
The COVID-19 pandemic has highlighted the need for efficient vaccine platforms that can rapidly be developed and manufactured on a large scale to immunize the population against emerging viruses. Viral-vectored vaccines are prominent vaccine platforms that have been approved for use against the Ebola virus and SARS-CoV-2. The Newcastle Disease Virus is a promising viral vector, as an avian paramyxovirus that infects poultry but is safe for use in humans and other animals. NDV has been extensively studied not only as an oncolytic virus but also a vector for human and veterinary vaccines, with currently ongoing clinical trials for use against SARS-CoV-2. However, there is a gap in NDV research when it comes to process development and scalable manufacturing, which are critical for future approved vaccines. In this review, we summarize the advantages of NDV as a viral vector, describe the steps and limitations to generating recombinant NDV constructs, review the advances in human and veterinary vaccine candidates in pre-clinical and clinical tests, and elaborate on production in embryonated chicken eggs and cell culture. Mainly, we discuss the existing data on NDV propagation from a process development perspective and provide prospects for the next steps necessary to potentially achieve large-scale NDV-vectored vaccine manufacturing.
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Affiliation(s)
| | - Amine A. Kamen
- Viral Vectors and Vaccines Bioprocessing Group, Department of Bioengineering, McGill University, Montreal, QC H3A 0G4, Canada;
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2
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Vilela J, Rohaim MA, Munir M. Avian Orthoavulavirus Type-1 as Vaccine Vector against Respiratory Viral Pathogens in Animal and Human. Vaccines (Basel) 2022; 10:259. [PMID: 35214716 PMCID: PMC8876055 DOI: 10.3390/vaccines10020259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 01/30/2022] [Accepted: 02/04/2022] [Indexed: 11/17/2022] Open
Abstract
Avian orthoavulaviruses type-1 (AOaV-1) have recently transitioned from animal vaccine vector to a bona fide vaccine delivery vehicle in human. Owing to induction of robust innate and adaptive immune responses in mucus membranes in both birds and mammals, AOaVs offer an attractive vaccine against respiratory pathogens. The unique features of AOaVs include over 50 years of safety profile, stable expression of foreign genes, high infectivity rates in avian and mammalian hosts, broad host spectrum, limited possibility of recombination and lack of pre-existing immunity in humans. Additionally, AOaVs vectors allow the production of economical and high quantities of vaccine antigen in chicken embryonated eggs and several GMP-grade mammalian cell lines. In this review, we describe the biology of AOaVs and define protocols to manipulate AOaVs genomes in effectively designing vaccine vectors. We highlighted the potential and established portfolio of AOaV-based vaccines for multiple respiratory and non-respiratory viruses of veterinary and medical importance. We comment on the limitations of AOaV-based vaccines and propose mitigations strategies. The exploitation of AOaVs vectors is expanding at an exciting pace; thus, we have limited the scope to their use as vaccines against viral pathogens in both animals and humans.
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Affiliation(s)
- Julianne Vilela
- Division of Biomedical and Life Sciences, Lancaster University, Lancaster LA1 4YG, UK; (J.V.); (M.A.R.)
| | - Mohammed A. Rohaim
- Division of Biomedical and Life Sciences, Lancaster University, Lancaster LA1 4YG, UK; (J.V.); (M.A.R.)
- Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt
| | - Muhammad Munir
- Division of Biomedical and Life Sciences, Lancaster University, Lancaster LA1 4YG, UK; (J.V.); (M.A.R.)
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Hein R, Koopman R, García M, Armour N, Dunn JR, Barbosa T, Martinez A. Review of Poultry Recombinant Vector Vaccines. Avian Dis 2021; 65:438-452. [PMID: 34699141 DOI: 10.1637/0005-2086-65.3.438] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 06/02/2021] [Indexed: 11/05/2022]
Abstract
The control of poultry diseases has relied heavily on the use of many live and inactivated vaccines. However, over the last 30 yr, recombinant DNA technology has been used to generate many novel poultry vaccines. Fowlpox virus and turkey herpesvirus are the two main vectors currently used to construct recombinant vaccines for poultry. With the use of these two vectors, more than 15 recombinant viral vector vaccines against Newcastle disease, infectious laryngotracheitis, infectious bursal disease, avian influenza, and Mycoplasma gallisepticum have been developed and are commercially available. This review focuses on current knowledge about the safety and efficacy of recombinant viral vectored vaccines and the mechanisms by which they facilitate the control of multiple diseases. Additionally, the development of new recombinant vaccines with novel vectors will be briefly discussed.
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Affiliation(s)
- Ruud Hein
- Consultant Poultry Diseases Molecular Vaccine Technology Georgetown DE 19947,
| | - Rik Koopman
- MSD Animal Health/Intervet International BV, Boxmeer, 5831 AN Netherlands
| | - Maricarmen García
- Poultry Diagnostic and Research Center, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA 30602
| | - Natalie Armour
- Poultry Research and Diagnostic Laboratory, Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Pearl, MS 39208
| | - John R Dunn
- United States Department of Agriculture, Agricultural Research Service, U.S. National Poultry Research Center, Southeast Poultry Research Laboratory, Athens, GA 30602
| | | | - Algis Martinez
- Cobb-Vantress Global Veterinary Services, Siloam Springs, AR 72761
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Dimitrov KM, Taylor TL, Marcano VC, Williams-Coplin D, Olivier TL, Yu Q, Gogal RM, Suarez DL, Afonso CL. Novel Recombinant Newcastle Disease Virus-Based In Ovo Vaccines Bypass Maternal Immunity to Provide Full Protection from Early Virulent Challenge. Vaccines (Basel) 2021; 9:vaccines9101189. [PMID: 34696297 PMCID: PMC8538074 DOI: 10.3390/vaccines9101189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 09/27/2021] [Accepted: 10/06/2021] [Indexed: 11/16/2022] Open
Abstract
Newcastle disease (ND) is one of the most economically important poultry diseases. Despite intensive efforts with current vaccination programs, this disease still occurs worldwide, causing significant mortality even in vaccinated flocks. This has been partially attributed to a gap in immunity during the post-hatch period due to the presence of maternal antibodies that negatively impact the replication of the commonly used live vaccines. In ovo vaccines have multiple advantages and present an opportunity to address this problem. Currently employed in ovo ND vaccines are recombinant herpesvirus of turkeys (HVT)-vectored vaccines expressing Newcastle disease virus (NDV) antigens. Although proven efficient, these vaccines have some limitations, such as delayed immunogenicity and the inability to administer a second HVT vaccine post-hatch. The use of live ND vaccines for in ovo vaccination is currently not applicable, as these are associated with high embryo mortality. In this study, recombinant NDV-vectored experimental vaccines containing an antisense sequence of avian interleukin 4 (IL4R) and their backbones were administered in ovo at different doses in 18-day-old commercial eggs possessing high maternal antibodies titers. The hatched birds were challenged with virulent NDV at 2 weeks-of-age. Post-hatch vaccine shedding, post-challenge survival, challenge virus shedding, and humoral immune responses were evaluated at multiple timepoints. Recombinant NDV (rNDV) vaccinated birds had significantly reduced post-hatch mortality compared with the wild-type LaSota vaccine. All rNDV vaccines were able to penetrate maternal immunity and induce a strong early humoral immune response. Further, the rNDV vaccines provided protection from clinical disease and significantly decreased virus shedding after early virulent NDV challenge at two weeks post-hatch. The post-challenge hemagglutination-inhibition antibody titers in the vaccinated groups remained comparable with the pre-challenge titers, suggesting the capacity of the studied vaccines to prevent efficient replication of the challenge virus. Post-hatch survival after vaccination with the rNDV-IL4R vaccines was dose-dependent, with an increase in survival as the dose decreased. This improved survival and the dose-dependency data suggest that novel attenuated in ovo rNDV-based vaccines that are able to penetrate maternal immunity to elicit a strong immune response as early as 14 days post-hatch, resulting in high or full protection from virulent challenge, show promise as a contributor to the control of Newcastle disease.
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Affiliation(s)
- Kiril M. Dimitrov
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, US National Poultry Research Center, ARS, USDA, 934 College Station Road, Athens, GA 30605, USA or (K.M.D.); (T.L.T.); (V.C.M.); (D.W.-C.); (T.L.O.); (D.L.S.)
- Texas A&M Veterinary Medical Diagnostic Laboratory, 483 Agronomy Road, College Station, TX 77843, USA
| | - Tonya L. Taylor
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, US National Poultry Research Center, ARS, USDA, 934 College Station Road, Athens, GA 30605, USA or (K.M.D.); (T.L.T.); (V.C.M.); (D.W.-C.); (T.L.O.); (D.L.S.)
| | - Valerie C. Marcano
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, US National Poultry Research Center, ARS, USDA, 934 College Station Road, Athens, GA 30605, USA or (K.M.D.); (T.L.T.); (V.C.M.); (D.W.-C.); (T.L.O.); (D.L.S.)
| | - Dawn Williams-Coplin
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, US National Poultry Research Center, ARS, USDA, 934 College Station Road, Athens, GA 30605, USA or (K.M.D.); (T.L.T.); (V.C.M.); (D.W.-C.); (T.L.O.); (D.L.S.)
| | - Timothy L. Olivier
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, US National Poultry Research Center, ARS, USDA, 934 College Station Road, Athens, GA 30605, USA or (K.M.D.); (T.L.T.); (V.C.M.); (D.W.-C.); (T.L.O.); (D.L.S.)
| | - Qingzhong Yu
- Endemic Poultry Viral Diseases Research Unit, Southeast Poultry Research Laboratory, US National Poultry Research Center, ARS, USDA, 934 College Station Road, Athens, GA 30605, USA;
| | - Robert M. Gogal
- Department of Veterinary Biosciences & Diagnostic Imaging, College of Veterinary Medicine, The University of Georgia, Athens, GA 30602, USA;
| | - David L. Suarez
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, US National Poultry Research Center, ARS, USDA, 934 College Station Road, Athens, GA 30605, USA or (K.M.D.); (T.L.T.); (V.C.M.); (D.W.-C.); (T.L.O.); (D.L.S.)
| | - Claudio L. Afonso
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, US National Poultry Research Center, ARS, USDA, 934 College Station Road, Athens, GA 30605, USA or (K.M.D.); (T.L.T.); (V.C.M.); (D.W.-C.); (T.L.O.); (D.L.S.)
- Correspondence: ; Tel.: +1-800-817-7160
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Generation and Evaluation of Recombinant Thermostable Newcastle Disease Virus Expressing the HA of H9N2 Avian Influenza Virus. Viruses 2021; 13:v13081606. [PMID: 34452473 PMCID: PMC8402907 DOI: 10.3390/v13081606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/11/2021] [Accepted: 08/11/2021] [Indexed: 12/30/2022] Open
Abstract
H9N2 avian influenza virus (AIV) has become endemic in many countries, causing great economic losses when co-infected with other pathogens. So far, several live vaccines based on Newcastle disease virus (NDV) vectors expressing influenza hemagglutinin (HA) have been developed. However, the thermostable recombinant NDV is rarely reported. In this study, using a thermostable NDV rAHR09 strain as the vector, three recombinant NDVs expressing native HA, chimeric HA ectodomain with transmembrane domain/C-terminal cytoplasmic tail domain from fusion protein of NDV, and HA ectodomain were generated, designated rAHR09-HA, rAHR09-HAF, and rAHR09-HAE. The MDT value of three recombinant NDVs was above 120 h, their ICPI value was about 0.03, and the recombinant NDVs were still infectious when treated for 100 min under 56 °C, which demonstrated that the recombinant NDVs kept the lentogenic and thermostable nature of rAHR09. The immunization data showed that rAHR09-HA and rAHR09-HAF induced a higher HI antibody titer against H9N2 AIV and NDV. After being challenged with H9N2 AIV, the rAHR09-HA and rAHR09-HAF could significantly reduce the virus shedding in cloacal and tracheal swab samples. Our results suggest that rAHR09-HA and rAHR09-HAF might be vaccine candidates against H9N2 AIV.
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Murr M, Grund C, Breithaupt A, Mettenleiter TC, Römer-Oberdörfer A. Protection of Chickens with Maternal Immunity Against Avian Influenza Virus (AIV) by Vaccination with a Novel Recombinant Newcastle Disease Virus Vector. Avian Dis 2020; 64:427-436. [PMID: 33347549 DOI: 10.1637/aviandiseases-d-20-00014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 05/18/2020] [Indexed: 11/05/2022]
Abstract
Newcastle disease virus (NDV) vectors expressing avian influenza virus (AIV) hemagglutinin of subtype H5 protect specific pathogen-free chickens from Newcastle disease and avian influenza. However, maternal AIV antibodies (AIV-MDA+) are known to interfere with active immunization by influencing vaccine virus replication and gene expression, resulting in inefficient protection. To overcome this disadvantage, we inserted a transgene encoding a truncated soluble hemagglutinin (HA) in addition to the gene encoding membrane-bound HA from highly pathogenic avian influenza virus (HPAIV) H5N1 into lentogenic NDV Clone 30 genome (rNDVsolH5_H5) to overexpress H5 antigen. Vaccination of 3-wk-old AIV-MDA+ chickens with rNDVsolH5_H5 and subsequent challenge infection with HPAIV H5N1 3 wk later resulted in 100% protection. Vaccination of younger chickens with higher AIV-MDA levels 1 and 2 wk after hatch resulted in protection rates of 40% and 85%, respectively. However, all vaccinated chickens showed strongly reduced shedding of challenge virus compared with age-matched, nonvaccinated control chickens. All control chickens succumbed to the HPAIV infection with a grading in disease progression between the three groups, indicating the influence of AIV-MDAs even at a low level. Furthermore, the shedding and serologic data gathered after immunization indicate sufficient replication of the vaccine virus, which leads to the assumption that lower protection rates in younger AIV-MDA+ chickens are caused by an H5 antigen-specific block and not by the interference of the AIV-MDA and the vaccine virus itself. In summary, solid protective efficacy and reduced virus transmission were achieved in 3-wk-old AIV-MDA+ chickens, which is relevant especially in regions endemically infected with HPAIV H5N1.
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Affiliation(s)
- Magdalena Murr
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Südufer 10, 17493 Greifswald-Insel Riems, Germany
| | - Christian Grund
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Südufer 10, 17493 Greifswald-Insel Riems, Germany
| | - Angele Breithaupt
- Department of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Südufer 10, 17493 Greifswald-Insel Riems, Germany
| | - Thomas C Mettenleiter
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Südufer 10, 17493 Greifswald-Insel Riems, Germany
| | - Angela Römer-Oberdörfer
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Südufer 10, 17493 Greifswald-Insel Riems, Germany
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7
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Tan L, Wen G, Yuan Y, Huang M, Sun Y, Liao Y, Song C, Liu W, Shi Y, Shao H, Qiu X, Ding C. Development of a Recombinant Thermostable Newcastle Disease Virus (NDV) Vaccine Express Infectious Bronchitis Virus (IBV) Multiple Epitopes for Protecting against IBV and NDV Challenges. Vaccines (Basel) 2020; 8:vaccines8040564. [PMID: 33019497 PMCID: PMC7712034 DOI: 10.3390/vaccines8040564] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/16/2020] [Accepted: 09/28/2020] [Indexed: 12/17/2022] Open
Abstract
Newcastle disease (ND) and infectious bronchitis (IB) are two highly contagious diseases that severely threaten the poultry industry. The goal of this study is to prevent these two diseases and reduce the vaccine costs during storage and transportation. In this study, we design a thermostable recombinant Newcastle disease virus (NDV) candidate live vaccine strain designated as rLS-T-HN-T/B, which expresses the multiple epitope cassette of the identified infectious bronchitis virus (IBV) (S-T/B). The rLS-T-HN-T/B strain was found to possess similar growth kinetics, passage stability, morphological characteristics, and virulence to the parental LaSota strain. After incubation at 56 °C at the indicated time points, the rLS-T-HN-T/B strain was determined by the hemagglutination (HA), and 50% embryo infectious dose (EID50) assays demonstrated that it accords with the criteria for thermostability. The thermostable rLS-T-HN-T/B and parental LaSota vaccines were stored at 25 °C for 16 days prior to immunizing the one-day-old specific pathogen-free (SPF) chicks. Three weeks postimmunization, the virus challenge results suggested that the chicks vaccinated with the rLS-T-HN-T/B vaccine were protected by 100% and 90% against a lethal dose of NDV and IBV, respectively. Furthermore, the trachea ciliary activity assay indicated that the mean ciliostasis score of the chicks vaccinated with thermostable rLS-T-HN-T/B vaccine was significantly superior to that of the LaSota and PBS groups (p < 0.05). The rLS-T-HN-T/B vaccine stored at 25 °C for 16 days remained capable of eliciting the immune responses and protecting against IBV and NDV challenges. However, the same storage conditions had a great impact on the parental LaSota strain vaccinated chicks, and the NDV challenge protection ratio was only 20%. We conclude that the thermostable rLS-T-HN-T/B strain is a hopeful bivalent candidate vaccine to control both IB and ND and provides an alternative strategy for the development of cost-effective vaccines for village chickens, especially in the rural areas of developing countries.
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Affiliation(s)
- Lei Tan
- Department of Avian Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (L.T.); (Y.Y.); (M.H.); (Y.S.); (Y.L.); (C.S.); (W.L.); (Y.S.); (X.Q.)
| | - Guoyuan Wen
- Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Wuhan 430070, China; (G.W.); (H.S.)
| | - Yanmei Yuan
- Department of Avian Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (L.T.); (Y.Y.); (M.H.); (Y.S.); (Y.L.); (C.S.); (W.L.); (Y.S.); (X.Q.)
| | - Meizhen Huang
- Department of Avian Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (L.T.); (Y.Y.); (M.H.); (Y.S.); (Y.L.); (C.S.); (W.L.); (Y.S.); (X.Q.)
| | - Yingjie Sun
- Department of Avian Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (L.T.); (Y.Y.); (M.H.); (Y.S.); (Y.L.); (C.S.); (W.L.); (Y.S.); (X.Q.)
| | - Ying Liao
- Department of Avian Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (L.T.); (Y.Y.); (M.H.); (Y.S.); (Y.L.); (C.S.); (W.L.); (Y.S.); (X.Q.)
| | - Cuiping Song
- Department of Avian Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (L.T.); (Y.Y.); (M.H.); (Y.S.); (Y.L.); (C.S.); (W.L.); (Y.S.); (X.Q.)
| | - Weiwei Liu
- Department of Avian Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (L.T.); (Y.Y.); (M.H.); (Y.S.); (Y.L.); (C.S.); (W.L.); (Y.S.); (X.Q.)
| | - Yonghong Shi
- Department of Avian Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (L.T.); (Y.Y.); (M.H.); (Y.S.); (Y.L.); (C.S.); (W.L.); (Y.S.); (X.Q.)
| | - Huabin Shao
- Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Wuhan 430070, China; (G.W.); (H.S.)
| | - Xusheng Qiu
- Department of Avian Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (L.T.); (Y.Y.); (M.H.); (Y.S.); (Y.L.); (C.S.); (W.L.); (Y.S.); (X.Q.)
| | - Chan Ding
- Department of Avian Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (L.T.); (Y.Y.); (M.H.); (Y.S.); (Y.L.); (C.S.); (W.L.); (Y.S.); (X.Q.)
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, China
- Correspondence: ; Tel.: +86-21-34293508
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Hu Z, Ni J, Cao Y, Liu X. Newcastle Disease Virus as a Vaccine Vector for 20 Years: A Focus on Maternally Derived Antibody Interference. Vaccines (Basel) 2020; 8:vaccines8020222. [PMID: 32422944 PMCID: PMC7349365 DOI: 10.3390/vaccines8020222] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 04/28/2020] [Accepted: 05/11/2020] [Indexed: 01/08/2023] Open
Abstract
It has been 20 years since Newcastle disease virus (NDV) was first used as a vector. The past two decades have witnessed remarkable progress in vaccine generation based on the NDV vector and optimization of the vector. Protective antigens of a variety of pathogens have been expressed in the NDV vector to generate novel vaccines for animals and humans, highlighting a great potential of NDV as a vaccine vector. More importantly, the research work also unveils a major problem restraining the NDV vector vaccines in poultry, i.e., the interference from maternally derived antibody (MDA). Although many efforts have been taken to overcome MDA interference, a lack of understanding of the mechanism of vaccination inhibition by MDA in poultry still hinders vaccine improvement. In this review, we outline the history of NDV as a vaccine vector by highlighting some milestones. The recent advances in the development of NDV-vectored vaccines or therapeutics for animals and humans are discussed. Particularly, we focus on the mechanisms and hypotheses of vaccination inhibition by MDA and the efforts to circumvent MDA interference with the NDV vector vaccines. Perspectives to fill the gap of understanding concerning the mechanism of MDA interference in poultry and to improve the NDV vector vaccines are also proposed.
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Affiliation(s)
- Zenglei Hu
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
- Animal Infectious Disease Laboratory, School of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China
| | - Jie Ni
- Animal Infectious Disease Laboratory, School of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China
| | - Yongzhong Cao
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
| | - Xiufan Liu
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
- Animal Infectious Disease Laboratory, School of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China
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9
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Bello MB, Yusoff K, Ideris A, Hair-Bejo M, Jibril AH, Peeters BPH, Omar AR. Exploring the Prospects of Engineered Newcastle Disease Virus in Modern Vaccinology. Viruses 2020; 12:v12040451. [PMID: 32316317 PMCID: PMC7232247 DOI: 10.3390/v12040451] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/13/2020] [Accepted: 03/15/2020] [Indexed: 12/12/2022] Open
Abstract
Many traditional vaccines have proven to be incapable of controlling newly emerging infectious diseases. They have also achieved limited success in the fight against a variety of human cancers. Thus, innovative vaccine strategies are highly needed to overcome the global burden of these diseases. Advances in molecular biology and reverse genetics have completely restructured the concept of vaccinology, leading to the emergence of state-of-the-art technologies for vaccine design, development and delivery. Among these modern vaccine technologies are the recombinant viral vectored vaccines, which are known for their incredible specificity in antigen delivery as well as the induction of robust immune responses in the vaccinated hosts. Although a number of viruses have been used as vaccine vectors, genetically engineered Newcastle disease virus (NDV) possesses some useful attributes that make it a preferable candidate for vectoring vaccine antigens. Here, we review the molecular biology of NDV and discuss the reverse genetics approaches used to engineer the virus into an efficient vaccine vector. We then discuss the prospects of the engineered virus as an efficient vehicle of vaccines against cancer and several infectious diseases of man and animals.
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Affiliation(s)
- Muhammad Bashir Bello
- Department of Veterinary Microbiology, Faculty of Veterinary Medicine, Usmanu Danfodiyo University PMB, Sokoto 2346, Nigeria;
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia; (K.Y.); (A.I.); (M.H.-B.)
| | - Khatijah Yusoff
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia; (K.Y.); (A.I.); (M.H.-B.)
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia
| | - Aini Ideris
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia; (K.Y.); (A.I.); (M.H.-B.)
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia Serdang, Selangor 43400, Malaysia
| | - Mohd Hair-Bejo
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia; (K.Y.); (A.I.); (M.H.-B.)
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia Serdang, Selangor 43400, Malaysia
| | - Abdurrahman Hassan Jibril
- Department of Veterinary Public Health and Preventive Medicine, Faculty of Veterinary Medicine, Usmanu Danfodiyo University PMB, Sokoto 2346, Nigeria;
| | - Ben P. H. Peeters
- Department of Virology, Wageningen Bioveterinary Research, POB 65, NL8200 Lelystad, The Netherlands;
| | - Abdul Rahman Omar
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia; (K.Y.); (A.I.); (M.H.-B.)
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia Serdang, Selangor 43400, Malaysia
- Correspondence: ; Tel.:+603-89472111
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10
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Roy Chowdhury I, Yeddula SGR, Pierce BG, Samal SK, Kim SH. Newcastle disease virus vectors expressing consensus sequence of the H7 HA protein protect broiler chickens and turkeys against highly pathogenic H7N8 virus. Vaccine 2019; 37:4956-4962. [PMID: 31320218 DOI: 10.1016/j.vaccine.2019.07.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 07/02/2019] [Accepted: 07/06/2019] [Indexed: 10/26/2022]
Abstract
Continuous outbreaks of highly pathogenic avian influenza (HPAI) viruses in commercial poultry have caused devastating losses to domestic poultry with a raising public health concern. The outbreaks of HPAI viruses have increased worldwide, including the North America. Therefore, vaccination has been considered as an alternative strategy for an efficient control of HPAI viruses. In this study, we aimed to generate Newcastle disease virus (NDV) vectored H7 serotype-specific vaccines by expressing the consensus sequence of the HA protein. Conventional NDV strain LaSota vector and a chimeric NDV vector containing the avian paramyxovirus type-2 F and HN protein were able to express the consensus sequence of HA protein. The protective efficacy of vaccines was evaluated in broiler chickens and in turkeys. One-day-old poults were prime immunized with the chimeric vector expressing the HA protein followed by boost immunization with LaSota vector expressing the HA protein or co-expressing the HA and NA proteins. Our vaccine candidates provided complete protection of broiler chickens from mortality and shedding of H7N8 HPAI challenge virus. Turkeys were better protected by boosting with the LaSota vector co-expressing the HA and NA proteins than the LaSota vector expressing only the HA protein. Our study demonstrated a potential use of heterologous prime and boost vaccination strategy to protect poultry against H7 HPAI viruses.
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Affiliation(s)
- Ishita Roy Chowdhury
- VA-MD College of Veterinary Medicine, University of Maryland, College Park, MD, USA
| | | | - Brian G Pierce
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD, USA; Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, USA
| | - Siba K Samal
- VA-MD College of Veterinary Medicine, University of Maryland, College Park, MD, USA
| | - Shin-Hee Kim
- VA-MD College of Veterinary Medicine, University of Maryland, College Park, MD, USA.
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11
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Hu H, Roth JP, Yu Q. Generation of a recombinant Newcastle disease virus expressing two foreign genes for use as a multivalent vaccine and gene therapy vector. Vaccine 2018; 36:4846-4850. [PMID: 30037477 DOI: 10.1016/j.vaccine.2018.06.055] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 06/20/2018] [Accepted: 06/23/2018] [Indexed: 11/29/2022]
Abstract
Newcastle disease virus (NDV) has been used as a vector in the development of vaccines and gene therapy. A majority of these NDV vectors express only a single foreign gene through either an independent transcription unit (ITU) or an internal ribosomal entry site (IRES). In the present study, we combined the ITU and IRES methods to generate a novel NDV LaSota strain-based recombinant virus vectoring the red fluorescence protein (RFP) and the green fluorescence protein (GFP) genes. Biological assessments of the recombinant virus, rLS/IRES-RFP/GFP, showed that it was slightly attenuated in vivo, yet maintained similar growth dynamics and viral yields in vitro when compared to the parental LaSota virus. Expression of both the RFP and GFP was detected from the rLS/IRES-RFP/GFP virus-infected DF-1 cells by fluorescence microscopy. These data suggest that the rLS/IRES-RFP/GFP virus may be used as a multivalent vector for the development of vaccines and gene therapy agents.
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Affiliation(s)
- Haixia Hu
- College of Animal Science and Technology, Southwest University, Chongqing 400715, China; Southeast Poultry Research Laboratory, US National Poultry Research Center, Agricultural Research Services, United States Department of Agriculture, 934 College Station Road, Athens, GA 30605, USA
| | - Jason P Roth
- Southeast Poultry Research Laboratory, US National Poultry Research Center, Agricultural Research Services, United States Department of Agriculture, 934 College Station Road, Athens, GA 30605, USA
| | - Qingzhong Yu
- Southeast Poultry Research Laboratory, US National Poultry Research Center, Agricultural Research Services, United States Department of Agriculture, 934 College Station Road, Athens, GA 30605, USA.
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12
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Newcastle disease virus-based H5 influenza vaccine protects chickens from lethal challenge with a highly pathogenic H5N2 avian influenza virus. NPJ Vaccines 2017; 2:33. [PMID: 29263888 PMCID: PMC5714955 DOI: 10.1038/s41541-017-0034-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 09/25/2017] [Accepted: 10/03/2017] [Indexed: 12/29/2022] Open
Abstract
Since December 2014, Eurasian-origin, highly pathogenic avian influenza H5 viruses including H5N1, H5N2, and H5N8 subtypes (called H5Nx viruses), which belong to the H5 clade 2.3.4.4, have been detected in U.S. wild birds. Subsequently, highly pathogenic H5N2 and H5N8 viruses have caused outbreaks in U.S. domestic poultry. Vaccination is one of the most effective ways to control influenza outbreaks and protect animal and public health. Newcastle disease virus (NDV)-based influenza vaccines have been demonstrated to be efficacious and safe in poultry. Herein, we developed an NDV-based H5 vaccine (NDV-H5) that expresses a codon-optimized ectodomain of the hemagglutinin from the A/chicken/Iowa/04-20/2015 (H5N2) virus and evaluated its efficacy in chickens. Results showed that both live and inactivated NDV-H5 vaccines induced hemagglutinin inhibition antibody titers against the H5N2 virus in immunized chickens after prime and booster, and both NDV-H5 vaccines completely protected chickens from lethal challenge with the highly pathogenic H5N2 A/turkey/Minnesota/9845-4/2015 virus. No clinical signs and only minimal virus shedding was observed in both vaccinated groups. In contrast, all mock-vaccinated, H5N2-infected chickens shed virus and died within 5 days post challenge. Furthermore, one dose of the live NDV-H5 vaccine also provided protection of 90% chickens immunized by coarse spraying; after exposure to H5N2 challenge, sera from vaccinated surviving chickens neutralized both highly pathogenic H5N1 and H5N8 viruses. Taken together, our results suggest that the NDV-based H5 vaccine is able to protect chickens against intercontinental highly pathogenic H5Nx viruses and can be used by mass application to protect the poultry industry. Vaccines based on Newcastle disease virus have proved efficacious in protecting chickens from H5 avian influenza strains. Avian influenza causes significant losses to the agriculture industry, indicating the importance of research into their control. A research collaboration of US and Chinese scientists, led by Kansas State University’s Wenjun Ma, have now produced vaccines based on Newcastle disease virus (NDV) — a platform easily modified to express immunity-stimulating proteins from other pathogens. Chickens vaccinated with the group’s vaccines survived a lethal dose of avian flu strain H5N2 and generated neutralizing antibodies cross-protective against other avian flu subtypes. The vaccine was easily applied by spraying the animals. The authors suggest that their data, in addition to previous studies, indicate that NDV could also be a useful vaccine platform for mammals such as humans.
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13
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Dimitrov KM, Afonso CL, Yu Q, Miller PJ. Newcastle disease vaccines-A solved problem or a continuous challenge? Vet Microbiol 2016; 206:126-136. [PMID: 28024856 PMCID: PMC7131810 DOI: 10.1016/j.vetmic.2016.12.019] [Citation(s) in RCA: 192] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 12/10/2016] [Accepted: 12/15/2016] [Indexed: 01/11/2023]
Abstract
Newcastle disease (ND) has been defined by the World Organisation for Animal Health as infection of poultry with virulent strains of Newcastle disease virus (NDV). Lesions affecting the neurological, gastrointestinal, respiratory, and reproductive systems are most often observed. The control of ND must include strict biosecurity that prevents virulent NDV from contacting poultry, and also proper administration of efficacious vaccines. When administered correctly to healthy birds, ND vaccines formulated with NDV of low virulence or viral-vectored vaccines that express the NDV fusion protein are able to prevent clinical disease and mortality in chickens upon infection with virulent NDV. Live and inactivated vaccines have been widely used since the 1950's. Recombinant and antigenically matched vaccines have been adopted recently in some countries, and many other vaccine approaches have been only evaluated experimentally. Despite decades of research and development towards formulation of an optimal ND vaccine, improvements are still needed. Impediments to prevent outbreaks include uneven vaccine application when using mass administration techniques in larger commercial settings, the difficulties associated with vaccinating free-roaming, multi-age birds of village flocks, and difficulties maintaining the cold chain to preserve the thermo-labile antigens in the vaccines. Incomplete or improper immunization often results in the disease and death of poultry after infection with virulent NDV. Another cause of decreased vaccine efficacy is the existence of antibodies (including maternal) in birds, which can neutralize the vaccine and thereby reduce the effectiveness of ND vaccines. In this review, a historical perspective, summary of the current situation for ND and NDV strains, and a review of traditional and experimental ND vaccines are presented.
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Affiliation(s)
- Kiril M Dimitrov
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, United States National Poultry Research Center, USDA/ARS, Athens, GA, 30605, USA
| | - Claudio L Afonso
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, United States National Poultry Research Center, USDA/ARS, Athens, GA, 30605, USA
| | - Qingzhong Yu
- Endemic Poultry Viral Diseases Research Unit, Southeast Poultry Research Laboratory, United States National Poultry Research Center, USDA/ARS, Athens, GA, 30605, USA
| | - Patti J Miller
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, United States National Poultry Research Center, USDA/ARS, Athens, GA, 30605, USA.
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14
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Suarez DL, Pantin-Jackwood MJ. Recombinant viral-vectored vaccines for the control of avian influenza in poultry. Vet Microbiol 2016; 206:144-151. [PMID: 27916319 DOI: 10.1016/j.vetmic.2016.11.025] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 11/17/2016] [Accepted: 11/23/2016] [Indexed: 12/29/2022]
Abstract
Vaccination is a commonly used tool for the control of both low pathogenic and highly pathogenic avian influenza (AI) viruses. Traditionally, inactivated adjuvanted vaccines made from a low pathogenic field strain have been used for vaccination, but advances in molecular biology have allowed a number of different viral vectored vaccines, expressing the AI virus hemagglutinin (HA) gene, to be developed and licensed for use for control of AI. This review summarizes the licensed vector vaccines available for use in poultry. As a group, these vaccines can stimulate both a cellular and humoral immune response and, when antigenically well matched to the target AI strain, are effective at preventing clinical disease and reducing virus shedding if vaccinated birds do become infected. The vaccines can often be given to one-day old chicks in the hatchery, which can provide early protection and is a cost effective route of administration of the vaccine. All the licensed vectored vaccines, because they only express the HA gene, can potentially be used to differentiate vaccinated from vaccinated and infected birds, which is often referred to as a DIVA strategy. Although a potentially valuable tool for the surveillance of the virus in countries that vaccinate, the DIVA principle has currently not been applied. Concern remains that maternal antibody or pre-existing immunity to the vector or to the AI HA insert can suppress the immune response to the vaccine. The viral vectored vaccines appear to work well with a prime boost strategy where the vectored vaccine is given first and a different type of vaccine, often a killed adjuvanted vaccine is given two or three weeks later.
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Affiliation(s)
- David L Suarez
- Exotic and Emerging Avian Viral Diseases Research Unit, Southeast Poultry Research Laboratory, U.S. National Poultry Research Center, Agricultural Research Service, U.S. Department of Agriculture, Athens, GA, USA.
| | - Mary J Pantin-Jackwood
- Exotic and Emerging Avian Viral Diseases Research Unit, Southeast Poultry Research Laboratory, U.S. National Poultry Research Center, Agricultural Research Service, U.S. Department of Agriculture, Athens, GA, USA
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15
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Abstract
Antigenic drift of seasonal influenza viruses and the occasional introduction of influenza viruses of novel subtypes into the human population complicate the timely production of effective vaccines that antigenically match the virus strains that cause epidemic or pandemic outbreaks. The development of game-changing vaccines that induce broadly protective immunity against a wide variety of influenza viruses is an unmet need, in which recombinant viral vectors may provide. Use of viral vectors allows the delivery of any influenza virus antigen, or derivative thereof, to the immune system, resulting in the optimal induction of virus-specific B- and T-cell responses against this antigen of choice. This systematic review discusses results obtained with vectored influenza virus vaccines and advantages and disadvantages of the currently available viral vectors.
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Affiliation(s)
- Rory D de Vries
- a Department of Viroscience , Erasmus MC , Rotterdam , The Netherlands
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16
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Steglich C, Grund C, Röder A, Zhao N, Mettenleiter T, Römer-Oberdörfer A. Chimeric avian paramyxovirus-based vector immunization against highly pathogenic avian influenza followed by conventional Newcastle disease vaccination eliminates lack of protection from virulent ND virus. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.trivac.2014.03.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Influence of antigen insertion site and vector dose on immunogenicity and protective capacity in Sendai virus-based human parainfluenza virus type 3 vaccines. J Virol 2013; 87:5959-69. [PMID: 23514887 DOI: 10.1128/jvi.00227-13] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Recombinant Sendai virus (rSeV) was used as a live, attenuated vaccine vector for intranasal inoculation and mucosal expression of the hemagglutinin-neuraminidase (HN) surface glycoprotein of human parainfluenza virus type 3 (HPIV3). Two vaccine candidates rSeV-HPIV3HN(P-M) and rSeV-HPIV3(F-HN) were constructed in which the HPIV3 HN open reading frame and an additional gene junction was inserted in the P-M and F-HN gene junctions of rSeV, respectively. The rSeV-HPIV3HN(P-M) virus was attenuated compared to rSeV-HPIV3(F-HN) in LLC-MK2 cells, and yet both vaccine candidates grew to similar extents in NHBE cells and in the respiratory tracts of cotton rats. These results suggest that in vitro vector growth in NHBE cells more accurately predicts virus yield in cotton rats than does growth in LLC-MK2 cells. Both vaccine vectors elicited high levels of serum neutralizing antibodies and conferred protection from HPIV3 challenge in cotton rats. Compared to vaccination with a high dose (2,000,000 PFU), intranasal inoculation with a low dose (200 PFU) resulted in a 10-fold decrease in vector growth in the nasal cavity and trachea and a 50-fold decrease in the lungs. However, low-dose vaccination resulted in only modest decreases in anti-HPIV3 antibodies in sera and was sufficient to confer complete protection from HPIV3 challenge. Varying the HPIV3 antigen insertion site and vector dose allowed fine-tuning of the in vivo growth and immunogenicity of rSeV-based vaccines, but all four vaccination strategies tested resulted in complete protection from HPIV3 challenge. These results highlight the versatility of the rSeV platform for developing intranasally administered respiratory virus vaccines.
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Zamarin D, Palese P. Oncolytic Newcastle disease virus for cancer therapy: old challenges and new directions. Future Microbiol 2012; 7:347-67. [PMID: 22393889 DOI: 10.2217/fmb.12.4] [Citation(s) in RCA: 158] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Newcastle disease virus (NDV) is an avian paramyxovirus, which has been demonstrated to possess significant oncolytic activity against mammalian cancers. This review summarizes the research leading to the elucidation of the mechanisms of NDV-mediated oncolysis, as well as the development of novel oncolytic agents through the use of genetic engineering. Clinical trials utilizing NDV strains and NDV-based autologous tumor cell vaccines will expand our knowledge of these novel anticancer strategies and will ultimately result in the successful use of the virus in the clinical setting.
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Affiliation(s)
- Dmitriy Zamarin
- Department of Microbiology, Mount Sinai School of Medicine, New York, NY 10029, USA.
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19
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Geus EDD, Rebel JM, Vervelde L. Induction of respiratory immune responses in the chicken; implications for development of mucosal avian influenza virus vaccines. Vet Q 2012; 32:75-86. [DOI: 10.1080/01652176.2012.711956] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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