Expression of Reg genes in the pancreatic islet cells after IL-22 neutralization. Reg1, Reg2, and Reg3 δ gene expression levels (A-C) was determined in the pancreas of 6-week-old NOD mice immunized with CFA and treated with an IL-22 neutralizing or a control antibody. Female NOD mice were injected i.p. with either 100 μl of CFA emulsified in saline followed by 100 μl of IL-22 neutralizing antibody (IL-22-01) 1 hr later, or 100 μl of CFA emulsified in saline followed by 100 μl of isotype control antibody. Mice were sacrificed 48 hrs following immunization. Whole pancreatic tissue was homogenized and total RNA extracted for reverse transcription quantitative real-time PCR analysis using gene-specific primers. The results shown for each treatment have been compared to mice immunized with CFA and the IgG isotype antibody, and represent the average fold change of mRNA expression ± SEM. The relative expression of mRNA was taken from three pooled samples per group (with three mice per pooled sample). Treatments indicated by the asterisk (*) are significantly different from the CFA control (P<0.001).