Age-associated impairment of T cell immunity is linked to sex-dimorphic elevation of N-glycan branching.

Age-associated impairment of T cell immunity is linked to sex-dimorphic elevation of N-glycan branching.
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DOI:
10.1038/s43587-022-00187-y
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发表时间:
2022-03
期刊:
NATURE AGING
影响因子:
--
通讯作者:
Demetriou, Michael
Demetriou, Michael
中科院分区:
其他
文献类型:
--
作者:
Mkhikian, Haik;Hayama, Ken L.;Khachikyan, Khachik;Li, Carey;Zhou, Raymond W.;Pawling, Judy;Klaus, Suzi;Tran, Phuong Q. N.;Ly, Kim M.;Gong, Andrew D.;Saryan, Hayk;Hai, Jasper L.;Grigoryan, David;Lee, Philip L.;Newton, Barbara L.;Raffatellu, Manuela;Dennis, James W.;Demetriou, Michael

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Impaired T cell immunity with aging increases mortality from infectious disease. The branching of Asparagine-linked glycans is a critical negative regulator of T cell immunity. Here we show that branching increases with age in females more than males, in naïve more than memory T cells, and in CD4+ more than CD8+ T cells. Female sex hormones and thymic output of naïve T cells (TN) decrease with age, however neither thymectomy nor ovariectomy altered branching. Interleukin-7 (IL-7) signaling was increased in old female more than male mouse TN cells, and triggered increased branching. N-acetylglucosamine, a rate-limiting metabolite for branching, increased with age in humans and synergized with IL-7 to raise branching. Reversing elevated branching rejuvenated T cell function and reduced severity of Salmonella infection in old female mice. These data suggest sex-dimorphic antagonistic pleiotropy, where IL-7 initially benefits immunity through TN maintenance but inhibits TN function by raising branching synergistically with age-dependent increases in N-acetylglucosamine.
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