Further evidence of reduced antral tumour growth in gp130F/F/Il33−/− compared to gp130F/F mice was seen in a reduction in the number of Ki67 positive cells in the gastric mucosa (63.7 ± 5.7 vs. 35.0 ± 3.5, P = 0.0002) (Figure 2G, 2H). Here, MKI67 is linked to neoplasm.