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Effects of the human recombinant interleukin 4 (IL4) and human recombinant interleukin 13 (IL13) on urea release. (A) The urea content in IMhu cells, under basal condition (white) and after IL4 challenge (striped columns). (B) The urea content in IMhu cells, under basal condition (white) and after IL13 challenge (striped columns). The data are obtained after 24 h of incubation. * p < 0.05, ** p < 0.01, *** p < 0.0001 versus control. One-way ANOVA analysis was carried out.
