Livonesi MC, de Sousa RLM, Badra SJ, Figueiredo LTM. In vitro and in vivo studies of the Interferon-alpha action on distinct Orthobunyavirus.
Antiviral Res 2007;
75:121-8. [PMID:
17368573 PMCID:
PMC7114330 DOI:
10.1016/j.antiviral.2007.01.158]
[Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2006] [Revised: 01/24/2007] [Accepted: 01/25/2007] [Indexed: 11/23/2022]
Abstract
Oropouche, Caraparu, Guama, Guaroa and Tacaiuma viruses (Orthobunyavirus genus) cause human febrile illnesses and/or encephalitis. To achieve a therapeutical agent to prevent and/or treat these diseases we evaluated the antiviral action of Interferon-alpha (IFN-α) on these orthobunyaviruses. In vitro results showed that all the studied orthobunyaviruses are susceptible to antiviral action of IFN-α, but this susceptibility is limited and dependent on both concentration of drug and treatment period. In vivo results demonstrated that IFN-α present antiviral action on Oropouche and Guaroa viruses when used as a prophylactic treatment. Moreover, a treatment initiated 3 h after infection prevented the death of Guaroa virus infected-mice. Additionally, mortality of mice was related to the migration and replication of viruses in their brains. Our results suggest that IFN-α could be potentially useful in the prevention of diseases caused by Oropouche virus and in the prevention and/or treatment of diseases caused by Guaroa virus.
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