Linked Life Data

12401948

Source:http://linkedlifedata.com/resource/pubmed/id/12401948

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pubmed-article:12401948pubmed:dateCreated2002-10-28lld:pubmed
pubmed-article:12401948pubmed:abstractTextTransferrin and iron uptake by the brain were measured using [(59)Fe-(125)I]transferrin injected intravenously in rats aged from 15 days to 22 weeks. The values for both decreased with age. In rats aged 18 and 70 days the uptake was measured at short time intervals after the injection. When expressed as the volume of distribution (Vd), which represents the volume of plasma from which the transferrin and iron were derived, the results for iron were greater than those of transferrin as early as 7 min after injection and the difference increased rapidly with time, especially in the younger animals. A very similar time course was found for uptake by bone marrow (femurs) where iron uptake involves receptor-mediated endocytosis of Fe-transferrin, release of iron in the cell and recycling of apo-transferrin to the blood. It is concluded that, during transport of transferrin-bound plasma iron into the brain, a similar process occurs in brain capillary endothelial cells (BCECs) and that transcytosis of transferrin into the brain interstitium is only a minor pathway. Also, the high rate of iron transport into the brain in young animals, when iron requirements are high due to rapid growth of the brain, is a consequence of the level of expression and rate of recycling of transferrin receptors on BCECs. As the animal and brain mature both decrease.lld:pubmed
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pubmed-article:12401948pubmed:authorpubmed-author:MorganEvan...lld:pubmed
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pubmed-article:12401948pubmed:copyrightInfoCopyright 2002 S. Karger AG, Basellld:pubmed
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pubmed-article:12401948pubmed:volume24lld:pubmed
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pubmed-article:12401948pubmed:pagination106-13lld:pubmed
pubmed-article:12401948pubmed:dateRevised2011-11-17lld:pubmed
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pubmed-article:12401948pubmed:articleTitleMechanism and developmental changes in iron transport across the blood-brain barrier.lld:pubmed
pubmed-article:12401948pubmed:affiliationDepartment of Physiology, University of Western Australia, Crawley, W.A., Australia. ehmorgan@cyllene.uwa.edu.aulld:pubmed
pubmed-article:12401948pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:12401948pubmed:publicationTypeComparative Studylld:pubmed
pubmed-article:12401948pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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