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“Most importantly, in UBP43-deficient cells, IFN-beta induces a prolonged Stat1 tyrosine phosphorylation, DNA binding, and IFN-mediated gene activation.”
“Secondly, in untreated patients with stable MS, culture with IFN-beta induced excessive tyrosine phosphorylation of STAT1, and this correlated with low SHP1 tyrosine phosphatase levels.”
“We found that IFN-beta induced phosphorylation on tyrosine of STAT3 in U1.wt cells but not in U1.KR930 cells, whereas STAT1 and STAT2 were activated in both cell lines.”
The Journal of biological chemistry • 1999 | View Paper
“Prior treatment of U266 cells with IFN-beta downregulated IL-6-induced tyrosine phosphorylation of gp130, Jak2, PTP1D/Syp, Shc, and Erk2, and GTP-loading of p21ras.”
World journal of gastroenterology • 2006 | View Paper
“Low, but not high doses of IFN-beta caused enhanced tyrosine phosphorylation of STAT1 and STAT4, suppressed the levels of suppressor of cytokine signaling-1, and up-regulated the expression of inducible NO synthase in vivo.”
“ IFN-beta-mediated suppression is partially or completely prevented by catalase, 2-mercaptoethanol, and certain peroxidase substrates (ascorbic acid, potassium iodide, and tyrosine).”