Contribution of APCs to mucosal-associated invariant T cell activation in infectious disease and cancer. Issue 4 (May 2018)

• Record Type: Journal Article
• Authors: Shey, Muki Shehu; Balfour, Avuyonke; Wilkinson, Katalin Andrea; Meintjes, Graeme
• Is Part Of: Innate immunity. Volume 24:Issue 4(2018:May)
• Page Start: 192
• Page End: 202
• Publication Date: 2018-05
• Subjects: Antigen presenting cells -- cancer -- infectious disease -- IL-12 -- IL-18 -- MAIT cell activation -- MR1; Natural immunity -- Periodicals; Endotoxins -- Periodicals; 616.07905
• DOI: 10.1177/1753425918768695
• Languages: English
• ISSNs: 1753-4259

Abstract

APCs such as monocytes and dendritic cells are among the first cells to recognize invading pathogens and initiate an immune response. The innate response can either eliminate the pathogen directly, or through presentation of Ags to T cells, which can help to clear the infection. Mucosal-associated invariant T (MAIT) cells are among the unconventional T cells whose activation does not involve the classical co-stimulation during Ag presentation. MAIT cells can be activated either via presentation of unconventional Ags (such as riboflavin metabolites) through the evolutionarily conserved major histocompatibility class I-like molecule, MR1, or directly by cytokines such as IL-12 and IL-18. Given that APCs produce cytokines and can express MR1, these cells can play an important role in both pathways of MAIT cell activation. In this review, we summarize evidence on the role of APCs in MAIT cell activation in infectious disease and cancer. A better understanding of the interactions between APCs and MAIT cells is important in further elucidating the role of MAIT cells in infectious diseases, which may facilitate the design of novel interventions such as vaccines.