From the Deep Sea to Everywhere: Environmental Antigens for iNKT Cells

Review

Abstract

Invariant natural killer T (iNKT) cells are a unique subset of innate T cells that share features with innate NK cells and adaptive memory T cells. The first iNKT cell antigen described was found 1993 in a marine sponge and it took over 10 years for other, bacterial antigens to be described. Given the paucity of known bacterial iNKT cell antigens, it appeared as if iNKT cells play a very specialist role in the protection against few, rare and unusual pathogenic bacteria. However, in the last few years several publications painted a very different picture, suggesting that antigens for iNKT cells are found almost ubiquitous in the environment. These environmental iNKT cell antigens can shape the distribution, phenotype and function of iNKT cells. Here, these recent findings will be reviewed and their implications for the field will be outlined.

Keywords

Innate T cells Invariant natural killer T (iNKT) cells Environmental antigens Mucosal immunology 

Abbreviations

αGalCer

α-Galactosylceramide

EoE

Eosinophilic esophagitis

HDE

House dust extract

MHC

Major histocompatibility complex

TCR

T cell receptor

Th

T helper type

Vα14i

Invariant Vα14–Jα18 TCR rearrangement

Vα24i

Invariant Vα24–Jα18 TCR rearrangement

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Copyright information

© L. Hirszfeld Institute of Immunology and Experimental Therapy, Wroclaw, Poland 2015

Authors and Affiliations

  1. 1.Izmir International Biomedicine and Genome Institute (iBG-izmir)Dokuz Eylul University Health CampusIzmirTurkey

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