To investigate the ability of IL-4 in inducing the expression of Foxp3 molecules on the CD4+ T cells of EW-fed R23-3 mice, R23-3 mice were injected intravenously with anti-IL-4 mAb (1 mg; clone 11B11) or control antibody (1 mg; rat IgG, Cappel, Cochranville, PA, USA) on the day before and on day 3 of receiving the diet. Mice were weighed daily for 7 days. On day 7, the mice were euthanized, and their MLN and spleen cells and intestinal tissues were harvested. The expression of Foxp3 molecules on splenic and MLN CD4+ T cells was analyzed by flow cytometry.
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