Linked Life Data

8139766

Source:http://linkedlifedata.com/resource/pubmed/id/8139766

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pubmed-article:8139766pubmed:abstractTextThe iron chelators desferrioxamine (DFO), pyridoxal isonicotinoyl hydrazone (PIH), 2,2'-bipyridine, diethylenetriamine penta-acetic acid (DTPA) and 1,2 dimethyl-3-hydroxy pyrid-4-one (CP20) were analysed for their ability to change 59Fe uptake and release from the brain of 15- and 63-day rats either during or after intravenous injection of 59Fe-125I-transferrin. DTPA was the only chelator unable to significantly reduce iron uptake into the brain of 15-day rats. This indicates that iron is not released from transferrin at the luminal surface of brain capillary endothelial cells. CP20 was able to reduce iron uptake in the brain by 85% compared to 28% with DFO. Only CP20 was able to significantly reduce brain iron uptake in 63 day rats. Once 59Fe had entered the brain no chelator used was able to mediate its release. All of the chelators except CP20 had similar effects on femur iron uptake as they did on brain uptake, suggesting similar iron uptake mechanisms. It is concluded that during the passage of transferrin-bound iron into the brain the iron is released from transferrin within endothelial cells after endocytosis of transferrin.lld:pubmed
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pubmed-article:8139766pubmed:articleTitleEffects of chelators on iron uptake and release by the brain in the rat.lld:pubmed
pubmed-article:8139766pubmed:affiliationDepartment of Physiology, University of Western Australia, Nedlands.lld:pubmed
pubmed-article:8139766pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:8139766pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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