MMP3 and infection: In vivo, STm infections results in transcriptional upregulation of MMPs family genes, Mmp3, Mmp8, and Mmp28 in PPs and mesenteric lymph nodes (mLNs) 2 days post-infection (Handley and Miller, 2007) and further Mmp genes in the inflamed caecum up to 3 weeks post infection.