NADH oxidase-dependent CD39 expression by CD8(+) T cells modulates interferon gamma responses via generation of adenosine.

Abstract:

:Interferon gamma (IFNγ)-producing CD8(+) T cells (Tc1) play important roles in immunological disease. We now report that CD3/CD28-mediated stimulation of CD8(+) T cells to generate Tc1 cells, not only increases IFNγ production but also boosts the generation of reactive oxygen species (ROS) and augments expression of CD39. Inhibition of NADPH oxidases or knockdown of gp91phox in CD8(+) T cells abrogates ROS generation, which in turn modulates JNK and NFκB signalling with decreases in both IFNγ levels and CD39 expression. CD39(+)CD8(+) T cells substantially inhibit IFNγ production by CD39(-)CD8(+) T cells via the paracrine generation of adenosine, which is operational via adenosine type 2A receptors. Increases in numbers of CD39(+)CD8(+) T cells and associated enhancements in ROS signal transduction are noted in cells from patients with Crohn's disease. Our findings provide insights into Tc1-mediated IFNγ responses and ROS generation and link these pathways to CD39/adenosine-mediated effects in immunological disease.

journal_name

Nat Commun

journal_title

Nature communications

authors

Bai A,Moss A,Rothweiler S,Serena Longhi M,Wu Y,Junger WG,Robson SC

doi

10.1038/ncomms9819

subject

Has Abstract

pub_date

2015-11-09 00:00:00

pages

8819

issn

2041-1723

pii

ncomms9819

journal_volume

6

pub_type

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