Abstract
Sensory neurons of the trigeminal ganglion (TG) are of crucial importance in the pathogenesis of many alphaherpesviruses, constituting major target cells for latency and reactivation events. We showed earlier that a subpopulation of porcine TG neurons, in contrast to other porcine cell types, is highly resistant to cell death induced by infection with the porcine alphaherpesvirus pseudorabies virus (PRV). Here, we report that expression of Brn-3a, a neuron-specific transcription factor implicated in cell survival of sensory neurons, correlates with the increased resistance of TG neurons towards PRV-induced cell death. In addition, overexpression of Brn-3a in the sensory neuronal cell line ND7 markedly increased resistance of these cells to PRV-induced cell death. Hence, Brn-3a may play a hitherto uncharacterized role in protection of sensory neurons from alphaherpesvirus-induced cell death, which may have implications for different aspects of the alphaherpesvirus life cycle, including latency/reactivation events.
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