A three-stage intrathymic development pathway for the mucosal-associated invariant T cell lineage
- PMID: 27668799
- DOI: 10.1038/ni.3565
A three-stage intrathymic development pathway for the mucosal-associated invariant T cell lineage
Abstract
Mucosal-associated invariant T cells (MAIT cells) detect microbial vitamin B2 derivatives presented by the antigen-presenting molecule MR1. Here we defined three developmental stages and checkpoints for the MAIT cell lineage in humans and mice. Stage 1 and stage 2 MAIT cells predominated in thymus, while stage 3 cells progressively increased in abundance extrathymically. Transition through each checkpoint was regulated by MR1, whereas the final checkpoint that generated mature functional MAIT cells was controlled by multiple factors, including the transcription factor PLZF and microbial colonization. Furthermore, stage 3 MAIT cell populations were expanded in mice deficient in the antigen-presenting molecule CD1d, suggestive of a niche shared by MAIT cells and natural killer T cells (NKT cells). Accordingly, this study maps the developmental pathway and checkpoints that control the generation of functional MAIT cells.
Comment in
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How MAIT cells get their start.Nat Immunol. 2016 Oct 19;17(11):1238-1240. doi: 10.1038/ni.3584. Nat Immunol. 2016. PMID: 27760106 No abstract available.
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MAITs onstage in mice and men with three acts for development.Immunol Cell Biol. 2017 Jan;95(1):3-4. doi: 10.1038/icb.2016.102. Epub 2016 Nov 8. Immunol Cell Biol. 2017. PMID: 27824039 No abstract available.
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