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The interaction between invariant Natural Killer T cells and the mucosal microbiota

Journal

IMMUNOLOGY
Volume 155, Issue 2, Pages 164-175

Publisher

WILEY
DOI: 10.1111/imm.12958

Keywords

microbiota; mucosal immunology; invariant Natural Killer T cells

Categories

Funding

  1. TUBITAK [116Z272, 117Z216]
  2. European Molecular Biology Organization (EMBO Installation Grant) [3073]
  3. Dokuz Eylul University [2017.KB.SAG.029]

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The surface of mammalian bodies is colonized by a multitude of microbial organisms, which under normal conditions support the host and are considered beneficial commensals. This requires, however, that the composition of the commensal microbiota is tightly controlled and regulated. The host immune system plays an important role in the maintenance of this microbiota composition. Here we focus on the contribution of one particular immune cell type, invariant Natural Killer T (iNKT) cells, in this process. The iNKT cells are a unique subset of T cells characterized by two main features. First, they express an invariant T-cell receptor that recognizes glycolipid antigens presented by CD1d, a non-polymorphic major histocompatibility complex class I-like molecule. Second, iNKT cells develop as effector/memory cells and swiftly exert effector functions, like cytokine production and cytotoxicity, after activation. We outline the influence that the mucosal microbiota can have on iNKT cells, and how iNKT cells contribute to the maintenance of the microbiota composition.

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