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Epigenetic changes in chromatin structure at the T helper (Th2) locus correlate with interukin-4 (IL-4) and IL-13 expression during Th2 differentiation. By using a transgenic green fluorescence protein (GFP) reporter system, we show that conserved noncoding sequence-2 (CNS-2), located downstream of the Il4 locus, is a constitutively active enhancer in NKT cells as well as in a subset of CD44 hi...
Molecular mechanisms underlying the coordination of isotype switching with plasma cell differentiation are poorly understood. We show that interferon regulatory factor-4 (IRF-4) regulates both processes by controlling the expression of the Aicda and Prdm1 genes, which encode AID and Blimp-1, respectively. Genome-wide analysis demonstrated that Irf4 −/− B cells failed to induce the entire Blimp-1-dependent...
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