Obesity impairs γδ T cell homeostasis and antiviral function in humans.

Obesity impairs γδ T cell homeostasis and antiviral function in humans.
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DOI:
10.1371/journal.pone.0120918
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Jameson JM
Jameson JM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Costanzo AE;Taylor KR;Dutt S;Han PP;Fujioka K;Jameson JM

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Obese patients are susceptible to increased morbidity and mortality associated with infectious diseases such as influenza A virus. γδ T cells and memory αβ T cells play key roles in reducing viral load by rapidly producing IFN-γ and lysing infected cells. In this article we analyze the impact of obesity on T lymphocyte antiviral immunity. Obese donors exhibit a reduction in γδ T cells in the peripheral blood. The severity of obesity negatively correlates with the number of γδ T cells. The remaining γδ T cells have a skewed maturation similar to that observed in aged populations. This skewed γδ T cell population exhibits a blunted antiviral IFN-γ response. Full γδ T cell function can be restored by potent stimulation with 1-Hydroxy-2-methyl-buten-4yl 4-diphosphate (HDMAPP), suggesting that γδ T cells retain the ability to produce IFN-γ. Additionally, γδ T cells from obese donors have reduced levels of IL-2Rα. IL-2 is able to restore γδ T cell antiviral cytokine production, which suggests that γδ T cells lack key T cell specific growth factor signals. These studies make the novel finding that the γδ T cell antiviral immune response to influenza is compromised by obesity. This has important implications for the development of therapeutic strategies to improve vaccination and antiviral responses in obese patients.
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影响因子: --
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