IFN-γ and pro-inflammatory cytokine production by antigen-presenting cells is dictated by intracellular thiol redox status regulated by oxygen tension
Open Access
- 24 September 2002
- journal article
- research article
- Published by Wiley in European Journal of Immunology
- Vol. 32 (10) , 2866-2873
- https://doi.org/10.1002/1521-4141(2002010)32:10<2866::aid-immu2866>3.0.co;2-v
Abstract
Murine mature splenic DC with elevated intracellular glutathione, pretreated with IL-18, strikingly augmented the production of IFN-γ in response to IL-12, whereas intracellular glutathione deprivation ablated this effect of IL-18. Likewise, macrophages with elevated intracellular glutathione augmented IFN-γ production upon LPS or IL-12+IL-18 stimulation, whereas macrophages withreduced intracellular glutathione showed the reciprocal response. Under hypoxia, macrophages displayed a functional phenotype with decreased intracellular glutathione, i.e. decreased NO and IL-12, and elevated IL-10 production. However, mature DC and macrophages produced an elevated amount of IFN-γ under hypoxia. Taken together, our results suggest that the intracellular redox status of DC and macrophages may play a pivotal role in local innate immunity, depending on local oxygen tension.Keywords
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