Figure 2.

Induction of the M2 phenotype in peritoneal and bone‐marrow‐derived macrophages by stimulation with interleukin‐4 (IL‐4)/IL‐13. (a) RT‐PCR assay for the expression of Irf4 mRNA in isolated peritoneal and bone‐marrow‐derived macrophages stimulated with IL‐4/IL‐13. (b) RT‐PCR assay for the expression of Arg1 mRNA in isolated peritoneal and bone‐marrow‐derived macrophages stimulated with IL‐4/IL‐13. (c) RT‐PCR assay for the expression of Fizz1 mRNA in isolated peritoneal and bone‐marrow‐derived macrophages stimulated with IL‐4/IL‐13. Data are representative of five independent experiments. Error bars represent SD. *P < 0·05 (Student's t‐test).