Author:
Vyborova Anna,Janssen Anke,Gatti Lucrezia,Karaiskaki Froso,Yonika Austin,van Dooremalen Sanne,Sanders Jasper,Beringer Dennis X.,Straetemans Trudy,Sebestyen Zsolt,Kuball Jürgen
Abstract
γ9δ2T cells fill a distinct niche in human immunity due to the unique physiology of the phosphoantigen-reactive γ9δ2TCR. Here, we highlight reproducible TCRδ complementarity-determining region 3 (CDR3δ) repertoire patterns associated with γ9δ2T cell proliferation and phenotype, thus providing evidence for the role of the CDR3δ in modulatingin vivoT-cell responses. Features that determine γ9δ2TCR binding affinity and reactivity to the phosphoantigen-induced ligandin vitroappear to similarly underpinin vivoclonotypic expansion and differentiation. Likewise, we identify a CDR3δ bias in the γ9δ2T cell natural killer receptor (NKR) landscape. While expression of the inhibitory receptor CD94/NKG2A is skewed toward cells bearing putative high-affinity TCRs, the activating receptor NKG2D is expressed independently of the phosphoantigen-sensing determinants, suggesting a higher net NKR activating signal in T cells with TCRs of low affinity. This study establishes consistent repertoire–phenotype associations and justifies stratification for the T-cell phenotype in future research on γ9δ2TCR repertoire dynamics.
Subject
Immunology,Immunology and Allergy
Cited by
1 articles.
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