Gene expression analysis in proximal and distal colons of Lcn2-/- IL10-/- double knock-out mice

Lcn2 is involved in host defense against pathogens, but the function in intestinal mucosal immunity and inflammation remains largely unknown. Genetic ablation of Lcn2 results in early-onset colitis and spontaneous emergence of right-sided colonic tumors in the setting of IL-10 deficiency (Lcn2-/-;IL10-/- mice). To address whether inflammation or other mechanisms drives the site-specific tumor locations gene expression analyses in proximal versus distal colons of Lcn2-/- IL10-/- mice were performed. Differential expression between distal colon versus cecum and proximal colon samples were analyses using Affymetrix MoGene 2.0 ST arrays on formalin-fixed, paraffin-embedded tissue sections of Lcn2-/-; IL10-/-mice.