MAIT and iNKT cells in tissue homeostasis and repair

Mucosal-associated invariant T (MAIT) and invariant natural killer T (iNKT) are innate-like T cells, which develop in the thymus through an original developmental program leading to the acquisition of effector memory and tissue targeting phenotypes. Consequently, they become tissue-resident and quic...

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Main Authors: Rafael Almeida Paiva, Marion Salou
Format: Article
Language:English
Published: Elsevier 2025-05-01
Series:Immunobiology
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Online Access:http://www.sciencedirect.com/science/article/pii/S0171298525000518
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author Rafael Almeida Paiva
Marion Salou
author_facet Rafael Almeida Paiva
Marion Salou
author_sort Rafael Almeida Paiva
collection DOAJ
description Mucosal-associated invariant T (MAIT) and invariant natural killer T (iNKT) are innate-like T cells, which develop in the thymus through an original developmental program leading to the acquisition of effector memory and tissue targeting phenotypes. Consequently, they become tissue-resident and quickly produce effector molecules both in a T cell receptor (TCR)-dependent manner after stimulation by activating antigens, and in a TCR-independent fashion in response to cytokines. The latter can trigger MAIT and iNKT cells similarly, potentially leading to redundant functions. MAIT and iNKT cells populate most peripheral tissues where they express a wide range of effector modules including immune type 1/2/17, regulatory and repair programs. This endows them with a plethora of functional properties from anti-infectious immunity to regulation of homeostatic processes and tissue repair. In this review, we summarize the current literature on how MAIT and iNKT cells maintain organ homeostasis and contribute to regeneration in vivo, mostly focused on adipose tissue, intestine, lung, liver and skin. Furthermore, we underline TCR- and/or cytokine-dependent mechanisms and potential redundant, non-redundant or even opposing functions.
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spelling doaj-art-d580250e51dd4e33ad6222dbb05ad7f52025-08-20T03:24:34ZengElsevierImmunobiology0171-29852025-05-01230315291710.1016/j.imbio.2025.152917MAIT and iNKT cells in tissue homeostasis and repairRafael Almeida Paiva0Marion Salou1Institut Curie, PSL University, Inserm U932, Immunity and Cancer, 75005 Paris, FranceInstitut Curie, PSL University, Inserm U932, Immunity and Cancer, 75005 Paris, France; Corresponding author.Mucosal-associated invariant T (MAIT) and invariant natural killer T (iNKT) are innate-like T cells, which develop in the thymus through an original developmental program leading to the acquisition of effector memory and tissue targeting phenotypes. Consequently, they become tissue-resident and quickly produce effector molecules both in a T cell receptor (TCR)-dependent manner after stimulation by activating antigens, and in a TCR-independent fashion in response to cytokines. The latter can trigger MAIT and iNKT cells similarly, potentially leading to redundant functions. MAIT and iNKT cells populate most peripheral tissues where they express a wide range of effector modules including immune type 1/2/17, regulatory and repair programs. This endows them with a plethora of functional properties from anti-infectious immunity to regulation of homeostatic processes and tissue repair. In this review, we summarize the current literature on how MAIT and iNKT cells maintain organ homeostasis and contribute to regeneration in vivo, mostly focused on adipose tissue, intestine, lung, liver and skin. Furthermore, we underline TCR- and/or cytokine-dependent mechanisms and potential redundant, non-redundant or even opposing functions.http://www.sciencedirect.com/science/article/pii/S0171298525000518MAIT cellsiNKT cellsInnate-like T cellsTissue homeostasisTissue repairFibrosis
spellingShingle Rafael Almeida Paiva
Marion Salou
MAIT and iNKT cells in tissue homeostasis and repair
Immunobiology
MAIT cells
iNKT cells
Innate-like T cells
Tissue homeostasis
Tissue repair
Fibrosis
title MAIT and iNKT cells in tissue homeostasis and repair
title_full MAIT and iNKT cells in tissue homeostasis and repair
title_fullStr MAIT and iNKT cells in tissue homeostasis and repair
title_full_unstemmed MAIT and iNKT cells in tissue homeostasis and repair
title_short MAIT and iNKT cells in tissue homeostasis and repair
title_sort mait and inkt cells in tissue homeostasis and repair
topic MAIT cells
iNKT cells
Innate-like T cells
Tissue homeostasis
Tissue repair
Fibrosis
url http://www.sciencedirect.com/science/article/pii/S0171298525000518
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