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Cell-mediated immune responses to COPV early proteins
Suchitra Jain1, Richard A Moore, Davina M Anderson
1Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, UK.
Virology
|September 5, 2006
Summary
Cell-mediated immunity is crucial for clearing papillomavirus warts. This study identifies early viral proteins, like E2, as key targets for effective therapeutic immunization against canine oral papillomavirus.
Area of Science:
- Immunology
- Virology
- Veterinary Medicine
Background:
- Cell-mediated immunity is vital for resolving papillomavirus-induced lesions.
- Identifying specific target antigens is essential for understanding and enhancing immune responses.
- Canine oral papillomavirus (COPV) in dogs serves as a valuable model for studying mucosal papillomavirus infections.
Purpose of the Study:
- To investigate systemic T cell responses to early COPV proteins during infection.
- To evaluate the efficacy of therapeutic immunization using particle-mediated immunodelivery (PMID) of COPV E2 and E1 genes.
- To correlate cell-mediated immune responses with protection against COPV.
Main Methods:
- Assessing T cell responses via delayed type hypersensitivity, lymphoproliferation, and IFN-gamma ELISPOT assays.
- Analyzing immune responses during the COPV infectious cycle.
- Vaccinating animals using particle-mediated immunodelivery (PMID) of codon-modified COPV E2 and E1 genes.
Main Results:
- Systemic T cell responses to early COPV proteins, particularly E2, were detected during the infectious cycle.
- Maximal T cell responses correlated with viral DNA replication and wart regression.
- PMID vaccination with E2 induced complete protection, while E1 provided partial protection, correlating with immune response intensity.
Conclusions:
- Early viral proteins, especially E2, are important targets for cell-mediated immunity against COPV.
- Therapeutic immunization via PMID with codon-modified E2 is highly effective in inducing protective immunity.
- The intensity of antigen-specific cell-mediated immunity and the route of immunization are critical for protective immunity.
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