期刊
SCIENCE ADVANCES
卷 7, 期 18, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abd2710
关键词
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资金
- National Institutes of Health [P01 AI073748, R01NS045937, NS030843, P01NS038037, P01AI056299]
- European Commission Excellent Science H2020 [708658, 10130984]
- National Multiple Sclerosis Society
- Marie Curie Actions (MSCA) [708658] Funding Source: Marie Curie Actions (MSCA)
T cell exhaustion is associated with poor prognosis in persistent viral infection and cancer, but has a favorable correlation with long-term clinical outcomes in the context of autoimmunity. The adaptor molecule Bat3 acts as a molecular checkpoint of T cell exhaustion, suppressing autoreactive T cell-mediated neuroinflammation by inhibiting mTORC2 and Akt function. Bat3 deficiency leads to increased Akt activity and T cell dysfunction under proinflammatory autoimmune conditions.
T cell exhaustion has been associated with poor prognosis in persistent viral infection and cancer. Conversely, in the context of autoimmunity, T cell exhaustion has been favorably correlated with long-term clinical outcome. Understanding the development of exhaustion in autoimmune settings may provide underlying principles that can be exploited to quell autoreactive T cells. Here, we demonstrate that the adaptor molecule Bat3 acts as a molecular checkpoint of T cell exhaustion, with deficiency of Bat3 promoting a profound exhaustion phenotype, suppressing autoreactive T cell-mediated neuroinflammation. Mechanistically, Bat3 acts as a critical mTORC2 inhibitor to suppress Akt function. As a result, Bat3 deficiency leads to increased Akt activity and FoxO1 phosphorylation, indirectly promoting Prdm1 expression. Transcriptional analysis of Bat3(-/-) T cells revealed up-regulation of dysfunction-associated genes, concomitant with down-regulation of genes associated with T cell effector function, suggesting that absence of Bat3 can trigger T cell dysfunction even under highly proinflammatory autoimmune conditions.
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