Acquisition of innate-like microbial reactivity in mucosal tissues during human fetal MAIT-cell development

Abstract excerpt

Innate-like, evolutionarily conserved MR1-restricted mucosa-associated invariant T (MAIT) cells represent a large antimicrobial T-cell subset in humans. Here, we investigate the development of these cells in second trimester human fetal tissues. MAIT cells are rare and immature in the fetal thymus, spleen and mesenteric lymph nodes. In contrast, mature IL-18Rα+ CD8αα MAIT cells are enriched in the fetal small...

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