Translational Medical Research Commons^™

A Study Of Gastrointestinal Pathophysiology, Emily Minor

Graduate Theses, Dissertations, and Problem Reports

Though the duodenum is the primary site of iron absorption, the colon also contains iron transporters and participates in iron absorption. The purpose of this study was to characterize colonic iron absorption in control patients and those with ulcerative colitis (UC), a disease that frequently results in iron deficiency. Using RT-qPCR and western blot analysis, we found that colonic expression of the apical iron importer, divalent metal transporter 1 (DMT1), is equal to duodenal expression. However, colonic expression of ferroportin 1 (FPN1), an iron exporter, is only about one-quarter that of the duodenum. Patients with active ulcerative colitis were found …