TFF1 and infection: Figure 4A shows that, in gastric antrum of C57BL/6 mice infected with H. felis, TFF1 mRNA is up-regulated at 3, 5, and 8 days post-infection (up to 2-fold compared to naïve), while it is already down-regulated after 14 days (0.3-fold compared to naïve) and remains low up to 6 weeks post-infection (42 days).