CXCL2 and colitis: The mRNA expression level of Cxcl2 and Il-1β in the colons of WT colitis mice was markedly elevated on day 7 (Figure 3C; Cxcl2; 0.0 ± 0.0 in WT normal, 5.3 ± 1.7 in WT colitis; p < 0.01, Il-1β; 0.4 ± 0.1 in WT normal, 6.6 ± 2.1 in WT colitis; p < 0.01).