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Deprecated: Implicit conversion from float 278.79999999999995 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Acta+Virol 2017 ; 61 (1): 48-55 Nephropedia Template TP
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T-705 (Favipiravir) suppresses tumor necrosis factor alpha production in response to influenza virus infection: A beneficial feature of T-705 as an anti-influenza drug #MMPMID28105854
Tanaka T; Kamiyama T; Daikoku T; Takahashi K; Nomura N; Kurokawa M; Shiraki K
Acta Virol 2017[]; 61 (1): 48-55 PMID28105854show ga
Influenza virus infection induces the production of various cytokines, which play important roles in the pathogenesis of infection. Among the cytokines induced by influenza, tumor necrosis factor alpha (TNF-alpha) production has been correlated with the severity of lung lesions. We investigated the effects of T-705 (Favipiravir, 6-fluoro-3-hydroxy-2-pyrazinecarboxamide) on cytokine production due to influenza virus infection in vitro and in vivo, compared with oseltamivir or GS 4071, an active form of oseltamivir. TNF-alpha production in mouse macrophage-derived P388D1 cells infected with the influenza virus was lower following treatment with T-705 at concentrations of 0.3 to 100 microg/ml than treatment with GS 4071 at the same concentrations. The effect of treatment with T-705 on the cytokine production induced by the influenza virus infection was investigated in mouse influenza virus infection model. At 48 h post-infection (p.i.) T-705 significantly suppressed the viral load in the lungs and TNF-alpha production in the airways of infected mice even when viral loads were high. Furthermore, T-705 suppressed only TNF-alpha production from the early phase of infection. In this study, T-705 showed the antiviral activity of reducing pulmonary viral load compared with oseltamivir, thereby suppressing the TNF-alpha production. This feature of T-705 is benefit against severe influenza infection.