The chelation of colonic luminal iron by a unique sodium alginate for the improvement of gastrointestinal health

Horniblow, Richard D. and Latunde-Dada, Gladys O. and Harding, Stephen E. and Schneider, Melanie and Almutairi, Fahad M. and Sahni, Manroy and Bhatti, Ahsan and Ludwig, Christian and Norton, Ian T. and Iqbal, Tariq H. and Tselepis, Chris (2016) The chelation of colonic luminal iron by a unique sodium alginate for the improvement of gastrointestinal health. Molecular Nutrition & Food Research, 60 (9). pp. 2098-2108. ISSN 1613-4133

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Abstract

Scope

Iron is an essential nutrient. However, in animal models, excess unabsorbed dietary iron residing within the colonic lumen has been shown to exacerbate inflammatory bowel disease and intestinal cancer. Therefore, the aims of this study were to screen a panel of alginates to identify a therapeutic that can chelate this pool of iron and thus be beneficial for intestinal health.

Methods and results

Using several in vitro intestinal models, it is evident that only one alginate (Manucol LD) of the panel tested was able to inhibit intracellular iron accumulation as assessed by iron-mediated ferritin induction, transferrin receptor expression, intracellular 59Fe concentrations, and iron flux across a Caco-2 monolayer. Additionally, Manucol LD suppressed iron absorption in mice, which was associated with increased fecal iron levels indicating iron chelation within the gastrointestinal tract. Furthermore, the bioactivity of Manucol LD was found to be highly dependent on both its molecular weight and its unique compositional sequence.

Conclusion

Manucol LD could be useful for the chelation of this detrimental pool of unabsorbed iron and it could be fortified in foods to enhance intestinal health.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: Horniblow, R. D., Latunde-Dada, G. O., Harding, S. E., Schneider, M., Almutairi, F. M., Sahni, M., Bhatti, A., Ludwig, C., Norton, I. T., Iqbal, T. H. and Tselepis, C. (2016), The chelation of colonic luminal iron by a unique sodium alginate for the improvement of gastrointestinal health. Mol. Nutr. Food Res., 60: 2098–2108, which has been published in final form at http://dx.doi.org/10.1002/mnfr.201500882. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Keywords: Absorption; Alginate; Chelation; Intestinal; Iron
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Biosciences
Identification Number: 10.1002/mnfr.201500882
Depositing User: Eprints, Support
Date Deposited: 03 Apr 2017 09:52
Last Modified: 10 Jun 2017 07:49
URI: http://eprints.nottingham.ac.uk/id/eprint/41693

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