PD-L1 co-stimulation contributes to ligand-induced T cell receptor down-modulation on CD8+ T cells.
PD-L1 co-stimulation contributes to ligand-induced T cell receptor down-modulation on CD8+ T cells.
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DOI:
10.1002/emmm.201100165
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发表时间:
2011-10
影响因子:
11.1
通讯作者:
Escors, David
中科院分区:
文献类型:
--
作者:
Karwacz, Katarzyna;Bricogne, Christopher;MacDonald, Douglas;Arce, Frederick;Bennett, Clare L.;Collins, Mary;Escors, David
T cell receptor (TCR) down-modulation after antigen presentation is a fundamental process that regulates TCR signal transduction. Current understanding of this process is that intrinsic TCR/CD28 signal transduction leads to TCR down-modulation. Here, we show that the interaction between programmed cell death 1 ligand 1 (PD-L1) on dendritic cells (DCs) and programmed death 1 (PD-1) on CD8 T cells contributes to ligand-induced TCR down-modulation. We provide evidence that this occurs via Casitas B-lymphoma (Cbl)-b E3 ubiquitin ligase up-regulation in CD8 T cells. Interference with PD-L1/PD-1 signalling markedly inhibits TCR down-modulation leading to hyper-activated, proliferative CD8 T cells as assessed in vitro and in vivo in an arthritis model. PD-L1 silencing accelerates anti-tumour immune responses and strongly potentiates DC anti-tumour capacities, when combined with mitogen-activated kinase (MAPK) modulators that promote DC activation.
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DOI:
10.4049/jimmunol.0903561
发表时间:
2010-05-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Mirza N;Duque MA;Dominguez AL;Schrum AG;Dong H;Lustgarten J
通讯作者:
Lustgarten J
影响因子:
4.4
作者:
Chemnitz, JM;Parry, RV;Riley, JL
通讯作者:
Riley, JL
影响因子:
20.3
作者:
Frecha, Cecilia;Costa, Caroline;Verhoeyen, Els
通讯作者:
Verhoeyen, Els
影响因子:
64.8
作者:
通讯作者:
--
影响因子:
4.4
作者:
Goold, Hugh D.;Escors, David;Bennett, Clare L.
通讯作者:
Bennett, Clare L.