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Tissue-resident mucosal-associated invariant T (MAIT) cells in the human kidney represent a functionally distinct subset.


ABSTRACT: Mucosal-associated invariant T (MAIT) cells are innate-like T-cells that recognize bacterial riboflavin metabolites. They are present in human blood but are abundant at barrier sites, including the liver, lungs, and kidneys, where they possess a CD69+ /CD103+/- tissue-resident phenotype. In renal tissue, MAIT cells likely defend against the ascending uropathogens responsible for urinary tract infections (UTIs), which are common, especially among renal transplant recipients (RTRs). Nevertheless, the functional role for MAIT cells in renal tissue and the influence of renal transplantation on MAIT cells remains unclear. Using multiparameter flow cytometry and the MR1-tetramer, we characterized MAIT cell phenotype and function in healthy renal tissue (n = 6), renal transplants explanted after allograft failure (n = 14) and in blood from healthy controls (n = 20) and RTRs before and 1-year after transplantation (n = 21). MAIT cells in renal tissue constitute a distinct CD69+ CD103+/- population that displays typical phenotypic features of tissue-resident T-cells and is skewed toward IL-2, GM-CSF, and IL-17A production upon stimulation. The circulating MAIT cell population was not decreased in number in RTRs pre- or post-transplantation. Tissue-resident MAIT cells in the kidney represent a functionally distinct population. This shows how MAIT cells in the kidney may be involved in the protection against microorganisms.

SUBMITTER: Terpstra ML 

PROVIDER: S-EPMC7689767 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Tissue-resident mucosal-associated invariant T (MAIT) cells in the human kidney represent a functionally distinct subset.

Terpstra Matty L ML   Remmerswaal Ester B M EBM   van der Bom-Baylon Nelly D ND   Sinnige Marjan J MJ   Kers Jesper J   van Aalderen Michiel C MC   Geerlings Suzanne E SE   Bemelman Frederike J FJ  

European journal of immunology 20200806 11


Mucosal-associated invariant T (MAIT) cells are innate-like T-cells that recognize bacterial riboflavin metabolites. They are present in human blood but are abundant at barrier sites, including the liver, lungs, and kidneys, where they possess a CD69<sup>+</sup> /CD103<sup>+/-</sup> tissue-resident phenotype. In renal tissue, MAIT cells likely defend against the ascending uropathogens responsible for urinary tract infections (UTIs), which are common, especially among renal transplant recipients  ...[more]

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