In situ immunohistochemical analysis of ileum paraffin sections were performed as described previously [28] (link). Primary antibodies against CD3 (#N1580, Dako, Denmark, dilution 1∶10), FOXP-3 (FJK-16s, eBioscience, 1∶100), myeloperoxidase-7 (MPO-7, # A0398, Dako, 1∶500), and F4/80 (#14-4801, clone BM8, eBioscience, 1∶50) were used. For each animal, the average number of positively stained cells within at least six independent high power fields (HPF, 0.287 mm2; 400× magnification) was determined microscopically by two independent double-blinded investigators.
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