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Christoff, Raissa R.; Liesner, Isabelle L.; Gavino-Leopoldino, Daniel; Andrade, Bruna; Oliveira de Campos, Beatriz; Salgado, Isabella; Simões-Lemos, Felipe; Da Poian, Andrea T.; Assunção-Miranda, Iranaia; Figueiredo, Claudia P.; Clarke, Julia R.
Behavioural brain research, 08/2024, Letnik: 471Journal Article
Zika virus (ZIKV) is a neurotropic Orthoflavivirus that causes a myriad of neurological manifestations in newborns exposed in uterus. Despite the devastating consequences of ZIKV on the developing brain, strategies to prevent or treat the consequences of viral infection are not yet available. We previously showed that short-term treatment with the TNF-α neutralizing monoclonal antibody. Infliximab could prevent seizures at acute and chronic stages of ZIKV infection, but had no impact on long-term cognitive and motor dysfunction. Due to the central role of inflammation in ZIKV-neuropathology, we hypothesized that prolonged treatment with the anti-TNF-α monoclonal antibody Infliximab could provide complete rescue of long-term behavioral deficits associated with neonatal ZIKV infection in mice. Here, neonatal (post-natal day 3) Swiss mice were submitted to subcutaneous (s.c.) injection of 106 PFU of ZIKV or mock medium and were then treated with Infliximab (20 μg/day) or sterile saline intraperitoneally (i.p.), for 40 days starting on the day of infection, and behavioral assessment started at 60 days post-infection (dpi). Infliximab prevented ZIKV-induced cognitive and motor impairments in mice. In addition, microgliosis and cell death found in mice following ZIKV infection were partially reversed by TNF-α blockage. Altogether, these results suggest that TNF-α-mediated inflammation is central for late ZIKV-induced behavioral deficits and cell death and strategies targeting this cytokine may be promising approaches to treat subjects exposed to the virus during development. •Neonatal ZIKV infection provokes long-lasting neurological consequences.•Long-term TNF-α neutralization prevents ZIKV-induced memory impairment in mice.•Long-term TNF-α neutralization prevents ZIKV-induced motor deficits in mice.•TNF-α neutralization reduces microglial activation and cell death in the hippocampus of ZIKV-infected mice.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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