Herpes simplex virus type 2-mediated disease is reduced in mice lacking RNase L

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Abstract

RNase L helps mediate the antiviral state induced by type I interferons (IFNαβ). Although herpes simplex virus (HSV) encodes inhibitors of the IFNαβ-induced antiviral response, the IFNαβ system serves the body as a first line of defense against HSV. We investigated whether RNase L limits HSV-2 replication and virulence. RNaseL-/- and wild-type C57BL/6 mice were infected intravaginally with HSV-2 strain 333. Although initial replication in the genital epithelium was similar, mice lacking RNase L developed less severe genital and neurologic disease than wild-type mice, survived longer, and contained lower viral titers in the nervous system. CD4+ T cell infiltration into the genital tract and spinal cord of RNase L-/- mice was reduced, suggesting that a restricted inflammatory response may account for reduction in disease. Thus, RNase L does not play a significant role in control of HSV-2 infection in vivo; instead, RNase L may regulate aspects of the inflammatory response that contribute to disease. © 2006 Elsevier Inc. All rights reserved.

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Duerst, R. J., & Morrison, L. A. (2007). Herpes simplex virus type 2-mediated disease is reduced in mice lacking RNase L. Virology, 360(2), 322–328. https://doi.org/10.1016/j.virol.2006.10.042

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