Bioavailability of iron from a heat treated glucose-lysine model food system: assays in rats and in Caco-2 cells

• Published in: Journal of the science of food and agriculture 2004-09, Vol.84 (12), p.1507-1513
• Main Authors: Delgado-Andrade, Cristina, Seiquer, Isabel, Navarro, M Pilar
• Format: Article
• Language: English
• Subjects: balance; Bioavailability; Biological and medical sciences; Caco-2 cells; Cells; Feeding. Feeding behavior; Food industries; Food science; Fundamental and applied biological sciences. Psychology; Glucose; Heat; Iron; Maillard reaction products; Rodents; Vertebrates: anatomy and physiology, studies on body, several organs or systems
• ISSN: 0022-5142; 1097-0010
• DOI: 10.1002/jsfa.1839

The influence of Maillard reaction products (MRP) from glucose–lysine on iron bioavailability was investigated. Equimolar glucose–lysine mixtures (GL, 40% moisture) were heated (150 °C, for 30, 60 and 90 min) to prepare samples GL30, GL60 and GL90, respectively, and were used to study the influence of MRP on iron solubility, iron uptake and transport in Caco‐2 cells and iron balance in rats. After an initial increase with GL30, in vitro iron solubility decreased in the presence of most of the heated samples. The Caco‐2 cell experiments showed that Fe cell content increased in the presence of heated mixtures with respect to GL, whereas transport was less affected. Iron balance was determined in rats fed diets containing the GL30 and GL90 samples (3%) for a 21 day period and compared with that measured in a control group. Consumption of glucose–lysine heated mixtures increased total iron retention, although hemoglobin values decreased. Iron accumulations in organs such as the spleen, kidney and small intestine were observed. Copyright © 2004 Society of Chemical Industry