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The most severe manifestation of Herpes Simplex Type 1 virus (HSV-1) infection is encephalitis characterized by arousal impairment and seizures that can evolve to coma and death. Previous studies reported the involvement of suppressor of cytokine signaling (SOCS) proteins, specifically SOCS1 and SOCS3, in HSV-1 infection, suggesting that other members of this family could be involved in the immune response against HSV-1. No previous study has reported the role of SOCS2 in HSV-1 infection. In the current study, C57BL/6 wild-type mice (WT) and mice deficient in SOCS2 gene (SOCS2-/-) were subjected to intracranial inoculation with 102 plaque forming units (PFU) of HSV-1. Survival curve, neuroinflammatory parameters and neuropathology were evaluated. Infected SOCS2-/- mice had increased survival in comparison with infected WT animals. This better outcome was associated with reduced leukocyte infiltration, concentration of cytokines, and structural changes in the brain. SOCS2 seems to play a detrimental role in HSV-1 encephalitis. Moreover, the control of neuroinflammatory response in HSV-1 infection was of paramount importance to clinical outcome. Copyright © 2016 Elsevier Inc. All rights reserved.


Larissa Fonseca da Cunha Sousa, Milene Alvarenga Rachid, Graciela Kunrath Lima, Aline Silva de Miranda, Márcia de Carvalho Vilela, Norinne Lacerda Queiroz, David Henrique Rodrigues, Marco Antonio Campos, Erna Geessien Kroon, Fabiana Simão Machado, Antônio Lúcio Teixeira. Suppressor of cytokine signaling 2 (SOCS2) contributes to encephalitis in a model of Herpes infection in mice. Brain research bulletin. 2016 Oct;127:164-170

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PMID: 27646480

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