Identification of phenotypically and functionally heterogeneous mouse mucosal-associated invariant T cells using MR1 tetramers.

Identification of phenotypically and functionally heterogeneous mouse mucosal-associated invariant T cells using MR1 tetramers.
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DOI:
10.1084/jem.20142110
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发表时间:
2015-06-29
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Godfrey DI
Godfrey DI
中科院分区:
其他
文献类型:
--
作者:
Rahimpour A;Koay HF;Enders A;Clanchy R;Eckle SB;Meehan B;Chen Z;Whittle B;Liu L;Fairlie DP;Goodnow CC;McCluskey J;Rossjohn J;Uldrich AP;Pellicci DG;Godfrey DI

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Rahimpour et al. use MR1 tetramers to characterize the heterogeneous population of mouse MAIT cells and find a close resemblance to their human counterparts. These findings will provide the foundation for further investigation of MAIT cells in health and disease. Studies on the biology of mucosal-associated invariant T cells (MAIT cells) in mice have been hampered by a lack of specific reagents. Using MR1-antigen (Ag) tetramers that specifically bind to the MR1-restricted MAIT T cell receptors (TCRs), we demonstrate that MAIT cells are detectable in a broad range of tissues in C57BL/6 and BALB/c mice. These cells include CD4−CD8−, CD4−CD8+, and CD4+CD8− subsets, and their frequency varies in a tissue- and strain-specific manner. Mouse MAIT cells have a CD44hiCD62Llo memory phenotype and produce high levels of IL-17A, whereas other cytokines, including IFN-γ, IL-4, IL-10, IL-13, and GM-CSF, are produced at low to moderate levels. Consistent with high IL-17A production, most MAIT cells express high levels of retinoic acid–related orphan receptor γt (RORγt), whereas RORγtlo MAIT cells predominantly express T-bet and produce IFN-γ. Most MAIT cells express the promyelocytic leukemia zinc finger (PLZF) transcription factor, and their development is largely PLZF dependent. These observations contrast with previous reports that MAIT cells from Vα19 TCR transgenic mice are PLZF− and express a naive CD44lo phenotype. Accordingly, MAIT cells from normal mice more closely resemble human MAIT cells than previously appreciated, and this provides the foundation for further investigations of these cells in health and disease.
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