Document Detail


Ethylenediaminetetraacetic acid (EDTA) does not increase iron uptake or ferritin synthesis by Caco-2 cells.
MedLine Citation:
PMID:  15135149     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Ethylenediaminetetraacetic acid (NaFe-EDTA) is a chelator capable of binding a wide variety of metals, with a high affinity constant for Fe(3+). NaFe-EDTA has been extensively studied and validated as an excellent choice for iron fortification programs and extensive research has demonstrated its high bioavailability specially for cereal based foods. To further evaluate the usefulness of this compound we performed iron uptake experiments with EDTA using the Caco-2 cell system. Cells were incubated in PBS at pH 5.5 or 7.0, containing or not ascorbic acid. Different sources of EDTA, different concentrations of NaFe-EDTA and the inclusion of another iron compound as electrolytic iron, were tested. Also, the ferritin content of Caco-2 cells 24h after 1h incubation with iron compounds was evaluated. Except for the addition of ascorbic acid, under the experimental conditions used, Caco-2 cells were not capable of obtaining iron from NaFe-EDTA. Furthermore, iron uptake from electrolytic iron was inhibited when Na(2) or K(2)-EDTA were included. Ferritin determinations to Caco-2 cells evaluated 24h after 1h incubation periods, showed that NaFe-EDTA did not induce new ferritin synthesis, since iron did not enter the cells. Further studies are required to evaluate incorporation of iron from NaFe-EDTA to a common iron pool and the requirements for iron uptake by Caco-2 cells.
Authors:
María Nieves García-Casal; Irene Leets; Miguel Layrisse
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of nutritional biochemistry     Volume:  15     ISSN:  0955-2863     ISO Abbreviation:  J. Nutr. Biochem.     Publication Date:  2004 May 
Date Detail:
Created Date:  2004-05-11     Completed Date:  2004-11-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9010081     Medline TA:  J Nutr Biochem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  261-6     Citation Subset:  IM    
Affiliation:
Instituto Venezolano de Investigaciones Científicas (IVIC). Carretera Panamericana Km. 11 Altos de Pipe. Apartado Postal 21827, Caracas 1020-A, Venezuela. mngarcia@medicina.ivic
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MeSH Terms
Descriptor/Qualifier:
Ascorbic Acid / pharmacology
Caco-2 Cells
Edetic Acid / pharmacology*
Ferritins / biosynthesis*
Humans
Hydrogen-Ion Concentration
Iron / metabolism*
Iron Compounds
Chemical
Reg. No./Substance:
0/Iron Compounds; 50-81-7/Ascorbic Acid; 60-00-4/Edetic Acid; 7439-89-6/Iron; 9007-73-2/Ferritins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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