Abstract
An important subtype of the innate-like T lymphocytes is mucosal-associated invariant T (MAIT) cells expressing a semi-invariant T cell receptor α (TCR-α) chain. MAIT cells could be activated mainly by TCR engagement or cytokines. They have been found to have essential roles in various immune mediated. There have been growing preclinical and clinical findings that show an association between MAIT cells and the physiopathology of inflammatory bowel diseases (IBD). Of note, published reports demonstrate contradictory findings regarding the role of MAIT cells in IBD patients. A number of reports suggests a protective effect, whereas others show a pathogenic impact. The present review article aimed to explore and discuss the findings of experimental and clinical investigations evaluating the effects of MAIT cells in IBD subjects and animal models. Findings indicate that MAIT cells could exert opposite effects in the course of IBD, including an anti-inflammatory protective effect of blood circulating MAIT cells and an effector pathogenic effect of colonic MAIT cells. Another important finding is that blood levels of MAIT cells can be considered as a potential biomarker in IBD patients.
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QI contributed to the conception and design of the study. LW and ZC performed data acquisition and prepared the first draft. QI, LW, and ZC performed revised the draft critically for important intellectual content. All the authors read and approved the final version to be submitted.
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Wei, L., Chen, Z. & Lv, Q. Mucosal-associated invariant T cells display both pathogenic and protective roles in patients with inflammatory bowel diseases. Amino Acids 55, 1819–1827 (2023). https://doi.org/10.1007/s00726-023-03344-8
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DOI: https://doi.org/10.1007/s00726-023-03344-8