Iron Absorption from Three Commercially Available Supplements in Gastrointestinal Cell Lines

• Published in: Nutrients Vol. 9; no. 9; p. 1008
• Main Authors: Uberti, Francesca, Morsanuto, Vera, Ghirlanda, Sabrina, Molinari, Claudio
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 13.09.2017; MDPI
• Subjects: Absorption; Biocompatibility; Biological Availability; Caco-2 Cells; Caco-2 permeability; Cation Transport Proteins - genetics; Cation Transport Proteins - metabolism; Cell Line, Tumor; Cell lines; Cell Survival; Dietary Supplements; Divalent metal transporter-1; DMT1 receptor; Epithelial cells; Epithelial Cells - metabolism; Extrusion; Formulations; Gene Expression Regulation; GTL-16 permeability; Humans; Intestinal Absorption; Intestine; Intestines - cytology; Intestines - metabolism; Iron; Iron - pharmacokinetics; iron mechanisms; iron metabolism; Kinetics; Mathematical models; Stimulation; iron metabolism; Caco-2 permeability; DMT1 receptor; iron mechanisms; GTL-16 permeability
• ISSN: 2072-6643; 2072-6643
• DOI: 10.3390/nu9091008

This study compares the absorption characteristics of two iron-based dietary supplements and their biocompatibility to bisglycinate iron, a common chelated iron form. The Caco-2 cell line-a model of human intestinal absorption-and GTL-16 cell line-a model of gastric epithelial cells-were used to perform the experiments; in the first experiments, the kinetics of absorption have been evaluated analyzing the divalent metal transporter 1 (DMT1) expression. Three different iron combinations containing 50 µM iron (named Fisioeme , Sideral and bisglycinate) were used for different stimulation times (1-24 h). After this, the effects of the three iron formulations were assessed in both a short and a long time, in order to understand the extrusion mechanisms. The effects of the three different formulations were also analyzed at the end of stimulation period immediately after iron removal, and after some time in order to clarify whether the mechanisms were irreversibly activated. Findings obtained in this study demonstrate that Fisioeme was able to maintain a significant beneficial effect on cell viability compared to control, to Sideral , and to iron bisglycinate. This observation indicates that Fisioeme formulation is the most suitable for gastric and intestinal epithelial cells.