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DNA vaccine-mediated immune responses in Coxsackie virus B3-infected mice
1Institute of Virology, Medical Center, Friedrich Schiller University, Winzerlaer Str. 10, D-07745 Jena, Germany. i6hean@rz.uni-jena.de
Abstract:
DNA immunizations with the major structural protein VP1 of Coxsackie virus B3 (CVB3) have been previously found to protect BALB/c mice from lethal challenge. Here we report that the other CVB3 capsid proteins, VP2, VP3, and VP4, were less effective at preventing CVB3-caused disease. The application of pCMV/VP1 as a vaccine caused decreased myocyte destruction, reduced viral load in the heart tissue, accelerated antibody induction, and an early cytokine expression in heart tissue. In summary, our results indicate that the induction of B cell and/or T cell memory in vaccinated mice prior to challenge is responsible for the protection observed.
Insights
DNA vaccination using Coxsackie virus B3 (CVB3) major structural protein VP1 protects mice from lethal challenge. This approach reduces heart damage and viral load by inducing robust B and T cell memory responses.
Area of Science:
- Virology
- Immunology
- Vaccine Development
Background:
- Coxsackie virus B3 (CVB3) infections can cause severe heart disease.
- Previous studies showed DNA immunization with CVB3 VP1 protein protected mice.
Purpose of the Study:
- To evaluate the efficacy of other CVB3 capsid proteins (VP2, VP3, VP4) as vaccines.
- To further investigate the protective mechanisms of pCMV/VP1 vaccination against CVB3 infection.
Main Methods:
- DNA immunization of BALB/c mice with different CVB3 capsid proteins.
- Assessment of protection against lethal CVB3 challenge.
- Measurement of viral load, myocyte destruction, antibody induction, and cytokine expression in heart tissue.
Main Results:
- pCMV/VP1 vaccination significantly reduced myocyte destruction and viral load in heart tissue.
- Vaccination with VP1 accelerated antibody induction and early cytokine expression.
- Other CVB3 capsid proteins (VP2, VP3, VP4) were less effective in preventing disease.
Conclusions:
- DNA immunization with pCMV/VP1 is a promising strategy for preventing CVB3-induced myocarditis.
- Protection is mediated by the induction of B cell and T cell memory responses prior to viral challenge.
