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DNA Vaccine

Apoptosis increases efficacy of alphaviral replicase-based DNA vaccines

Published in Vaccine Weekly, June 16th, 2004

Apoptosis is essential for the increased efficacy of alphaviral replicase-based DNA vaccines.

"Alphaviral replicons can increase the efficacy and immunogenicity of naked nucleic acid vaccines. To study the impact of apoptosis on this increased effectiveness, we co-delivered an anti-apoptotic gene (BCI-XL ) with the melanocyte/melanoma differentiation antigen TRP-1. Although cells co-transfected with Bcl-XL lived longer, produced more antigen, and elicited increased antibody production in vivo, co-delivery of pro-survival BCI-XL with antigen significantly reduced the ability of the replicase-based vaccine to protect against an...

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