Aging promotes neutrophil-induced mortality by augmenting IL-17 production during viral infection.

Aging promotes neutrophil-induced mortality by augmenting IL-17 production during viral infection.
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DOI:
10.1016/j.chom.2009.09.011
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发表时间:
2009-11-19
影响因子:
30.3
通讯作者:
Goldstein DR
Goldstein DR
中科院分区:
医学1区
文献类型:
--
作者:
Stout-Delgado HW;Du W;Shirali AC;Booth CJ;Goldstein DR

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Morbidity and mortality associated with viral infections increase with age, although the underlying mechanisms are unclear. Here, we investigated whether aging alters inflammatory responses during systemic viral infection and whether such age-related alterations contribute to viral-induced death. We found that infection of aged mice with systemic herpes viruses led to rapid increases in serum IL-17, neutrophil activation, and mortality due to hepatocyte necrosis. In contrast, all young mice survived infection, displaying weaker IL-17 induction and neutrophil activation. During viral activation, natural killer T cells isolated from the livers of aged mice exhibited greater RORγT gene expression and IL-17 production than young cells. Importantly, IL-17 neutralization or neutrophil depletion during viral infection reduced liver damage and prevented death of aged mice. These results demonstrate that, during systemic viral infection, aging alters the host-pathogen interaction to overproduce IL-17, inducing liver injury and death.
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