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 Communjournal_title
Nature communicationsauthors
Bai A,Moss A,Rothweiler S,Serena Longhi M,Wu Y,Junger WG,Robson SCdoi
10.1038/ncomms9819subject
Has Abstractpub_date
2015-11-09 00:00:00pages
8819issn
2041-1723pii
ncomms9819journal_volume
6pub_type
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