학술논문
A screen of Crohn's disease-associated microbial metabolites identifies ascorbate as a novel metabolic inhibitor of activated human T cells.
Document Type
article
Author
Chang, Yu-Ling; Rossetti, Maura; Vlamakis, Hera; Casero, David; Sunga, Gemalene; Harre, Nicholas; Miller, Shelley; Humphries, Romney; Stappenbeck, Thaddeus; Simpson, Kenneth W; Sartor, R Balfour; Wu, Gary; Lewis, James; Bushman, Frederic; McGovern, Dermot PB; Salzman, Nita; Borneman, James; Xavier, Ramnik; Huttenhower, Curtis; Braun, Jonathan
Source
Mucosal immunology. 12(2)
Subject
Language
Abstract
Microbial metabolites are an emerging class of mediators influencing CD4+ T-cell function. To advance the understanding of direct causal microbial factors contributing to Crohn's disease, we screened 139 predicted Crohn's disease-associated microbial metabolites for their bioactivity on human CD4+ T-cell functions induced by disease-associated T helper 17 (Th17) polarizing conditions. We observed 15 metabolites with CD4+ T-cell bioactivity, 3 previously reported, and 12 unprecedented. A deeper investigation of the microbe-derived metabolite, ascorbate, revealed its selective inhibition on activated human CD4+ effector T cells, including IL-17A-, IL-4-, and IFNγ-producing cells. Mechanistic assessment suggested the apoptosis of activated human CD4+ T cells associated with selective inhibition of energy metabolism. These findings suggest a substantial rate of relevant T-cell bioactivity among Crohn's disease-associated microbial metabolites, and evidence for novel modes of bioactivity, including targeting of T-cell energy metabolism.