Journal
CELL HOST & MICROBE
Volume 8, Issue 3, Pages 260-270Publisher
CELL PRESS
DOI: 10.1016/j.chom.2010.08.003
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Funding
- National Institutes of Health, National Cancer Institute, Center for Cancer Research
- National Cancer Institute
- SPORE in Cervical Cancer [P50 CA098252, CA118790]
- GlaxoSmithKline
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Using a human papillomavirus (HPV) cervicovaginal murine challenge model, we microscopically examined the in vivo mechanisms of L1 virus-like particle (VLP) and L2 vaccine-induced inhibition of infection. In vivo HPV infection requires an initial association with the acellular basement membrane (BM) to induce conformational changes in the virion that permit its association with the keratinocyte cell surface. By passive transfer of immune serum, we determined that anti-L1 antibodies can interfere with infection at two stages. Similarly to active VLP immunization, transfer of high L1 antibody concentrations prevented BM binding. However, in the presence of low concentrations of anti-L1, virions associated with the BM, but to the epithelial cell surface was not detected. Regardless of the concentration, L2 vaccine-induced antibodies allow BM association but prevent association with the cell surface. Thus, we have revealed distinct mechanisms of vaccine-induced inhibition of virus infection in vivo.
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