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Differentiation of effector/memory V ae 2 T cells and migratory routes in lymph nodes or inflammatory sites

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Item Type:Article
Title:Differentiation of effector/memory V ae 2 T cells and migratory routes in lymph nodes or inflammatory sites
Creators Name:Dieli, F. and Poccia, F. and Lipp, M. and Sireci, G. and Caccamo, N. and Di Sano, C. and Salerno, A.
Abstract:Vdelta2 T lymphocytes recognize nonpeptidic antigens without presentation by MHC molecules and mount both immediate effector functions and memory responses after microbial infection. However, how Vdelta2 T cells mediate different facets of a memory response remains unknown. Here, we show that the expression of CD45RA and CD27 antigens defines four subsets of human Vdelta2 T cells with distinctive compartmentalization routes. Naive CD45RA+CD27+ and memory CD45RA-CD27+ cells express lymph node homing receptors, abound in lymph nodes, and lack immediate effector functions. Conversely, memory CD45RA-CD27- and terminally differentiated CD45RA+CD27- cells, which express receptors for homing to inflamed tissues, are poorly represented in the lymph nodes while abounding at sites of inflammation, and display immediate effector functions. These observations and additional in vitro experiments indicate a lineage differentiation pattern for human Vdelta2 T cells that generates naive cells circulating in lymph nodes, effector/memory cells patrolling the blood, and terminally differentiated effector cells residing in inflamed tissues.
Keywords:{Gamma}{delta}2 T cells, Effector Functions, Chemokine Receptors, Functional Subsets, Phosphoantigens, Animals
Source:Journal of Experimental Medicine
Publisher:Rockefeller University Press
Page Range:391-397
Date:4 August 2003
Official Publication:https://doi.org/10.1084/jem.20030235
PubMed:View item in PubMed

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