Restraint stress decreases virus-induced pro-inflammatory cytokine mRNA expression during acute Theiler's virus infection.
2006
Abstract Stressful life events have been associated with the onset and/or exacerbation of multiple sclerosis (MS). Our previous studies have indicated that restraint stress (RS) reduces inflammation and virus-induced chemokine expression in the Theiler's virus-induced demyelination (TVID) model of MS. Here we report that RS significantly reduced the virus-induced interferon-γ mRNA levels in the brain. Additionally, mRNA levels of lymphotoxin-β, tumor necrosis factor-α, and interferon-γ in the brain were negatively correlated with viral titers in the brain. These results indicated an immunosuppressive effect of stress during early TVID causing impaired viral clearance, which may be a potential exacerbating factor for later demyelination.
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