Tuning of antigen sensitivity by T cell receptor-dependent negative feedback controls T cell effector function in inflamed tissues.
Publication/Presentation Date
2-20-2014
Abstract
Activated T cells must mediate effector responses sufficiently to clear pathogens while avoiding excessive tissue damage. Here we have combined dynamic intravital microscopy with ex vivo assessments of T cell cytokine responses to generate a detailed spatiotemporal picture of CD4(+) T cell effector regulation in the skin. In response to antigen, effector T cells arrested transiently on antigen-presenting cells, briefly producing cytokine and then resuming migration. Antigen recognition led to upregulation of the programmed death-1 (PD-1) glycoprotein by T cells and blocking its canonical ligand, programmed death-ligand 1 (PD-L1), lengthened the duration of migration arrest and cytokine production, showing that PD-1 interaction with PD-L1 is a major negative feedback regulator of antigen responsiveness. We speculate that the immune system employs T cell recruitment, transient activation, and rapid desensitization to allow the T cell response to rapidly adjust to changes in antigen presentation and minimize collateral injury to the host.
Volume
40
Issue
2
First Page
235
Last Page
247
ISSN
1097-4180
Published In/Presented At
Honda, T., Egen, J. G., Lämmermann, T., Kastenmüller, W., Torabi-Parizi, P., & Germain, R. N. (2014). Tuning of antigen sensitivity by T cell receptor-dependent negative feedback controls T cell effector function in inflamed tissues. Immunity, 40(2), 235–247. https://doi.org/10.1016/j.immuni.2013.11.017
Disciplines
Medicine and Health Sciences
PubMedID
24440150
Department(s)
Department of Medicine
Document Type
Article