T Cells Compete by Cleaving Cell Surface CD27 and Blocking Access to CD70-bearing APCs
Overview
Affiliations
T cells compete against each other for access to molecules on APCs in addition to peptide/MHC complexes. However, the identity of cell surface molecules that influence T-cell competition, other than peptide/MHC, have yet to be defined. Here, we identify CD70, a TNF ligand expressed on activated APCs, as an important mediator of T-cell competition for APCs. Upon engagement of CD27 by CD70, CD27 is proteolytically cleaved from the surface of the interacting CD8(+) T cell and captured by CD70 expressing dendritic cells. The capture of CD27 effectively masks CD70 on APCs, disallowing the interaction with CD27 on other competing T cells. Collectively, our data indicate that T cells compete against each other for access to the TNF-ligand CD70, an interaction that affects the duration and potency of T cell/DC interactions, thus influencing the repertoire of responding CD8(+) T cells to self or foreign antigens.
Liu L, Chen F, Li S, Yang T, Chen S, Zhou Y Sci Adv. 2024; 10(34):eadp8647.
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Bowakim-Anta N, Acolty V, Azouz A, Yagita H, Leo O, Goriely S Front Immunol. 2023; 14:1023064.
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PMID: 35452603 PMC: 9107929. DOI: 10.1016/j.ccell.2022.04.001.
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PMID: 35216458 PMC: 8877612. DOI: 10.3390/ijms23042342.