IL1B and necrotizing enterocolitis: While both Winnie −/− and Winnie +/+ mice subjected to the NEC protocol had increased levels of pro-inflammatory cytokines compared to DF controls (4.8 and 5.9 fold, respectively), Winnie +/+ NEC mice did not have elevated IL-1β and TNF- α compared to Winnie −/− NEC mice (Figure 2C).