Abstract
Ferric lactate is known to modify Ca2+ uptake by the cells. To enlighten the role of protein and ATP in this phenomenon, iron transfer from ferric lactate to albumin and adenosine polyphosphates was determined by electrophoresis. The order of iron affinity was ATP>ADP>AMP for the polyphosphates, and albumin does not compete for iron binding with the polyphosphates. The iron transfer to ATP was also observed in vivo by adsorption chromatography of the adenosine polyphosphates fraction from blood plasma of mice injected with ferric lactate plus ATP. In vitro iron and calcium uptake by Ehrlich ascites tumor cells showed that albumin and ATP decreased iron uptake, whereas calcium incorporation is diminished by albumin but augmented by ATP. This difference might be explained by albumin binding of ferric lactate that is inhibited from reaching cell structures, whereas ATP, known to be an inhibitor of iron polimerization, facilitates it.
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Anghileri, L.J., Maincent, P., Córdova-Martínez, A. et al. Effects of albumin and adenosine phosphates on iron transfer from ferric lactate. Biol Trace Elem Res 40, 83–88 (1994). https://doi.org/10.1007/BF02916823
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DOI: https://doi.org/10.1007/BF02916823