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- W2063169852 abstract "The pro-inflammatory cytokine Interleukin-1α (IL-1α) has recently emerged as a susceptibility marker for a wide array of inflammatory diseases associated with oxidative stress including Alzheimer's, arthritis, atherosclerosis, diabetes and cancer. In the present study, we establish that expression and nuclear localization of IL-1α are redox-dependent. Shifts in steady-state H2O2 concentrations (SS-[H2O2]) resulting from enforced expression of manganese superoxide dismutase (SOD2) drive IL-1α mRNA and protein expression. The redox-dependent expression of IL-1α is accompanied by its increased nuclear localization. Both IL-1α expression and its nuclear residency are abrogated by catalase co-expression. Sub-lethal doses of H2O2 also cause IL-1α nuclear localization. Mutagenesis revealed IL-1α nuclear localization does not involve oxidation of cysteines within its N terminal domain. Inhibition of the processing enzyme calpain prevents IL-1α nuclear localization even in the presence of H2O2. H2O2 treatment caused extracellular Ca2+ influx suggesting oxidants may influence calpain activity indirectly through extracellular Ca2+ mobilization. Functionally, as a result of its nuclear activity, IL-1α overexpression promotes NF-kB activity, but also interacts with the histone acetyl transferase (HAT) p300. Together, these findings demonstrate a mechanism by which oxidants impact inflammation through IL-1α and suggest that antioxidant-based therapies may prove useful in limiting inflammatory disease progression." @default.
- W2063169852 created "2016-06-24" @default.
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- W2063169852 date "2013-01-01" @default.
- W2063169852 modified "2023-09-30" @default.
- W2063169852 title "Redox-control of the alarmin, Interleukin-1α" @default.
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- W2063169852 doi "https://doi.org/10.1016/j.redox.2013.03.001" @default.
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