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- W4313369063 abstract "Abstract Elucidating the molecular mechanisms involved in pleotropic cytokine signaling can lead to novel treatment approaches for autoimmune diseases that target proinflammatory functions while maintaining immune-regulatory functions. To that end, we sought to further investigate the immune-regulatory roles of the pleotropic cytokine IFN-γ. Previous studies demonstrated that IFN-γ prevents the differentiation of pathogenic Th17 cells. In addition, nitric oxide generated via inducible nitric oxide synthase (iNOS) prevents differentiation of Th17 cells by nitration of ROR-γT. However, it remains unresolved whether IFN-γ prevents Th17 differentiation directly via inducing nitric oxide (NO) and nitration of ROR-γT. In line with previous observations, we found an increase in the frequency of autoreactive Th17 cells and a decrease in iNOS expression and NO in the absence of IFN-γ in mice with experimental autoimmune encephalomyelitis (EAE), an animal model of multiple sclerosis. Additionally, the increase in Th17 cells in the absence of IFN-γ was reversible both in vitro and in vivo with treatment with a NO donor. This indicates a role for IFN-γ in inhibiting the differentiation of Th17 cells via iNOS-derived NO. We are currently elucidating the underlying mechanisms of NO mediated suppression and the molecular link between ROR-γt-nitration and decreased Th17 differentiation by flow cytometry, single-cell western blotting of key transcription factors, and in vivo adoptive transfer studies. Our studies may lead to a better understanding of the role of IFN-g and NO/iNOS axis in Th17 cell differentiation and autoimmune diseases." @default.
- W4313369063 created "2023-01-06" @default.
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- W4313369063 date "2020-05-01" @default.
- W4313369063 modified "2023-09-27" @default.
- W4313369063 title "IFN-γ-induced nitric oxide leads to inhibition of Th17 differentiation via induction of iNOS and nitration of ROR-γ T" @default.
- W4313369063 doi "https://doi.org/10.4049/jimmunol.204.supp.230.15" @default.
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