Antibodies targeting HSV glycoprotein B require effector functions to protect neonatal mice
Slein, M. D.; Jimenez, L. M.; Backes, I. M.; Turnbaugh, E. M.; Garland, C. R.; MacDonald, S. W.; Balazs, A. B.; Leib, D. A.; Ackerman, M. E.
Show abstract
Glycoprotein B (gB) serves as the viral fusion protein for herpes simplex virus (HSV), mediating fusion between viral and host membranes resulting in infection. As such, gB represents a potentially critical target for the host immune system with high potential relevance for vaccine design. Here we investigated the mechanisms of protection for a panel of gB-specific monoclonal antibodies (mAb) in a mouse model of neonatal HSV (nHSV) infection. Viral neutralization contributed, but Fc effector functions were critical for mAb-mediated protection against nHSV mortality, depending on dose. Moreover, AAV-mediated in vivo expression of a gB-specific mAb in mice provided transgenerational protection against HSV-1 and HSV-2 mortality in their offspring. These findings demonstrate that antibodies targeting gB can serve as potent therapeutics and that they require diverse functional profiles to afford optimal protection, informing vaccine design.
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