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The effect of monoclonal antibodies on the growth of herpes simplex virus type 1 in trigeminal ganglia was investigated. Four-week-old mice were infected on an abrased cornea with herpes simplex virus type 1. Forty-eight hours after infection, trigeminal ganglia ipsilateral with infected eyes were removed and placed in culture. Incubation of infected ganglia in the presence of a pool of nonneutralizing monoclonal antibodies specific for glycoproteins of gB and gE suppressed virus growth by greater than 90%. This was comparable to the amount of suppression observed when infected ganglia were incubated in hyperimmune serum. Individual monoclonal antibodies were less efficient, being able to inhibit virus growth by only two- to threefold. The mechanism of suppression was examined. Reduction in virus growth was observed under conditions in which all susceptible ganglion cells were infected in vitro before nonneutralizing monoclonal antibody was added. Similar results were obtained in tests with virus-infected neuroblastoma cells. Furthermore, suppression of infectious progeny was seen in the absence of complement and immunologically reactive cells. Thus, neither virus neutralization nor immunocytolysis could account for the effects of antibody on virus growth. Rather, the data suggest that antibody can bind to herpes simplex virus type 1-infected neuronal cells and suppress intracellular virus replication.

Monoclonal antibodies suppress replication of herpes simplex virus type 1 in trigeminal ganglia