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An Anti-Tumor Vaccine Against Marek's Disease Virus Induces Differential Activation and Memory Response of γδ T Cells and CD8 T Cells in Chickens
- Source :
- Frontiers in Immunology, Vol 12 (2021), Frontiers in Immunology
- Publication Year :
- 2021
- Publisher :
- Frontiers Media SA, 2021.
-
Abstract
- Marek's disease virus (MDV) is a highly oncogenic alphaherpesvirus that causes deadly T-cell lymphomas and serves as a natural virus-induced tumor model in chickens. The most efficacious vaccine, CVI988/Rispens (CVI988), against MD has been used for several decades. However, the mechanisms leading to protective immunity following vaccination are not fully understood. In this study, employing multi-parameter flow cytometry, we performed a comprehensive analysis of T cell responses in CVI988-vaccinated chickens. CVI988 vaccination induced significant expansion of γδ T cells and CD8α+ T cells but not CD4+ T cells in spleen, lung and blood at early time-points. The expansion of these cells was CVI988-specific as infection with very virulent MDV RB1B did not elicit expansion of either γδ or CD8α+ T cells. Phenotypic analysis showed that CVI988 vaccination elicited preferential proliferation of CD8α+ γδ T cells and CD8αα co-receptor expression was upregulated on γδ T cells and CD8α+ T cells after immunization. Additionally, cell sorting and quantitative RT-PCR showed that CVI988 vaccination activated γδ T cells and CD8α+ T cells which exhibited differential expression of cytotoxic and T cell-related cytokines. Lastly, secondary immunization with CVI988 induced the expansion of CD8+ T cells but not γδ T cells at higher magnitude, compared to primary immunization, suggesting CVI988 did induce memory CD8+ T cells but not γδ T cells in chickens. Our results, for the first time, reveal a potential role of γδ T cells in CVI988-induced immune protection and provide new insights into the mechanism of immune protection against oncogenic MDV.
- Subjects :
- lcsh:Immunologic diseases. Allergy
0301 basic medicine
040301 veterinary sciences
T cell
Immunology
Spleen
CD8-Positive T-Lymphocytes
Biology
Cancer Vaccines
immune response
Flow cytometry
0403 veterinary science
03 medical and health sciences
MDV
Immune system
vaccine
Marek Disease
medicine
Animals
Immunology and Allergy
Cytotoxic T cell
Herpesvirus 2, Gallid
Poultry Diseases
Original Research
γδ T cell
Marek's disease
medicine.diagnostic_test
Vaccination
Receptors, Antigen, T-Cell, gamma-delta
Viral Vaccines
04 agricultural and veterinary sciences
biology.organism_classification
030104 developmental biology
medicine.anatomical_structure
CD8 T cell
Immunization
lcsh:RC581-607
Chickens
CD8
Subjects
Details
- ISSN :
- 16643224
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Frontiers in Immunology
- Accession number :
- edsair.doi.dedup.....e8534a4855d615d333d3e246d75a5f51