Here, we observed a significant enrichment of one of the genes that encode for the major iron storage protein ferritin, the ferritin heavy chain 1 (FTH1), in pooled epithelial IBD biopsies (Fig. 2A); and in pooled epithelial PD biopsies depletion of FTH1 and the gene that encodes for ferroportin (SLC40A1), the protein that drives ferritin export (Fig. 2B), relative to NHC biopsies. This evidence concerns the gene SLC40A1 and inflammatory bowel disease.