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T cell responses to BPV-4 E7 during infection and mapping of T cell epitopes


, : T cell responses to BPV-4 E7 during infection and mapping of T cell epitopes. Virology 206(1): 504-510

Vaccination of cattle with the recombinant E7 protein of bovine papillomavirus type 4 (BPV-4) prior to BPV-4 infection has been shown to retard development of papillomas and accelerate their regression. To understand the mechanism of regression we have measured proliferation of peripheral blood mononuclear cells (PBM) to E7 in vitro during the course of BPV-4 infection in both vaccinated and nonvaccinated cattle. In vaccinated cattle, T cells specific for E7 could be detected at high levels shortly after challenge, whereas in nonvaccinated cattle low responses of E7-specific T cells could be detected in only a few animals at the late stages of papilloma development. Using short overlapping synthetic peptides corresponding to the E7 protein, three T cell epitopes have been identified. T1 (aa 31-59) was immunodominant and T2 (aa 70-88) and T3 (aa21-40) were minor epitopes.

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PMID: 7530395


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