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Li H, Hua D, Qu Q, Cao H, Feng Z, Liu N, Huang J, Zhang L. Oral Immunization with Recombinant Saccharomyces cerevisiae Expressing Viral Capsid Protein 2 of Infectious Bursal Disease Virus Induces Unique Specific Antibodies and Protective Immunity. Vaccines (Basel) 2023; 11:1849. [PMID: 38140252 PMCID: PMC10747824 DOI: 10.3390/vaccines11121849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/09/2023] [Accepted: 12/13/2023] [Indexed: 12/24/2023] Open
Abstract
Infectious bursal disease (IBD), as a highly infectious immunosuppressive disease, causes severe economic losses in the poultry industry worldwide. Saccharomyces cerevisiae is an appealing vehicle used in oral vaccine formulations to safely and effectively deliver heterologous antigens. It can elicit systemic and mucosal responses. This study aims to explore the potential as oral an vaccine for S. cerevisiae expressing the capsid protein VP2 of IBDV. We constructed the recombinant S. cerevisiae, demonstrated that VP2 was displayed on the cell surface and had high immunoreactivity. By using the live ST1814G/Aga2-VP2 strain to immunize the mice, the results showed that recombinant S. cerevisiae significantly increased specific IgG and sIgA antibody titers, indicating the potential efficacy of vaccine-induced protection. These results suggested that the VP2 protein-expressing recombinant S. cerevisiae strain was a promising candidate oral subunit vaccine to prevent IBDV infection.
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Affiliation(s)
| | | | | | | | | | | | - Jinhai Huang
- School of Life Sciences, Tianjin University, Tianjin 300072, China; (H.L.); (D.H.); (Q.Q.); (H.C.); (Z.F.); (N.L.)
| | - Lei Zhang
- School of Life Sciences, Tianjin University, Tianjin 300072, China; (H.L.); (D.H.); (Q.Q.); (H.C.); (Z.F.); (N.L.)
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Bortolami A, Donini M, Marusic C, Lico C, Drissi Touzani C, Gobbo F, Mazzacan E, Fortin A, Panzarin VM, Bonfante F, Baschieri S, Terregino C. Development of a Novel Assay Based on Plant-Produced Infectious Bursal Disease Virus VP3 for the Differentiation of Infected From Vaccinated Animals. FRONTIERS IN PLANT SCIENCE 2021; 12:786871. [PMID: 34950172 PMCID: PMC8689005 DOI: 10.3389/fpls.2021.786871] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/02/2021] [Indexed: 05/28/2023]
Abstract
Infectious bursal disease virus is the causative agent of Gumboro disease, a severe infection that affects young chickens and is associated with lymphoid depletion in the bursa of Fabricius. Traditional containment strategies are based either on inactivated or live-attenuated vaccines. These approaches have several limitations such as residual virulence or low efficacy in the presence of maternally derived antibodies (MDA) but, most importantly, the impossibility to detect the occurrence of natural infections in vaccinated flocks. Therefore, the development of novel vaccination strategies allowing the differentiation of infected from vaccinated animals (DIVA) is a priority. Recently, commercial vectored and experimental subunit vaccines based on VP2 have been proved effective in protecting from clinical disease and posed the basis for the development of novel DIVA strategies. In this study, an engineered version of the VP3 protein of IBDV (His-VP3) was produced in plants, successfully purified from Nicotiana benthamiana leaves, and used to develop an enzyme-linked immunosorbent assay (ELISA) for the detection of anti-VP3 antibodies. The His-VP3 ELISA was validated with a panel of 180 reference sera and demonstrated to have 100% sensitivity (95% CI: 94.7-100.0) and 94.17% specificity (95% CI: 88.4-97.6). To evaluate the application of His-VP3 ELISA as a DIVA test, the novel assay was used to monitor, in combination with a commercial kit, detecting anti-VP2 antibodies, the immune response of chickens previously immunized with an inactivated IBDV vaccine, a recombinant Turkey herpes virus carrying the VP2 of IBDV (HVT-ND-IBD) or with plant-produced VP2 particles. The combined tests correctly identified the immune status of the vaccinated specific pathogen free white-leghorn chickens. Moreover, the His-VP3 ELISA correctly detected MDA against VP3 in commercial broiler chicks and showed that antibody titers fade with time, consistent with the natural decrease of maternally derived immunity. Finally, the novel assay, in combination with a VP2-specific ELISA, demonstrated its potential application as a DIVA test in chickens inoculated with VP2-based vaccines, being able to detect the seroconversion after challenge with a very virulent IBDV strain.
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Affiliation(s)
- Alessio Bortolami
- Department of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie (IZSVe), Legnaro, Italy
| | - Marcello Donini
- Laboratory of Biotechnology, ENEA Casaccia Research Center, Rome, Italy
| | - Carla Marusic
- Laboratory of Biotechnology, ENEA Casaccia Research Center, Rome, Italy
| | - Chiara Lico
- Laboratory of Biotechnology, ENEA Casaccia Research Center, Rome, Italy
| | - Charifa Drissi Touzani
- Avian Pathology Unit, Pathology and Veterinary Public Health Department, Agronomic and Veterinary Institute Hassan II, Rabat, Morocco
| | - Federica Gobbo
- Department of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie (IZSVe), Legnaro, Italy
| | - Elisa Mazzacan
- Department of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie (IZSVe), Legnaro, Italy
| | - Andrea Fortin
- Department of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie (IZSVe), Legnaro, Italy
| | - Valentina Maria Panzarin
- Department of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie (IZSVe), Legnaro, Italy
| | - Francesco Bonfante
- Department of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie (IZSVe), Legnaro, Italy
| | - Selene Baschieri
- Laboratory of Biotechnology, ENEA Casaccia Research Center, Rome, Italy
| | - Calogero Terregino
- Department of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie (IZSVe), Legnaro, Italy
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