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• W2012124492 abstract "We examined the kinetics and distribution of [59Fe–125I] rat Tf and unlabelled human Tf injected into a lateral cerebral ventricle (i.c.v. injection) in the rat. [56Fe–131I]Tf injected intravenously served as a control of blood–brain barrier (BBB) integrity. In CSF of adult rats, 59Fe and [125I]Tf decreased to only 2.5% of the dose injected after 4 h. In brain parenchyma, [125I]Tf had disappeared after 24 h, whereas approximately 18% of i.c.v.-injected 59Fe was retained even after 72 h. The elimination pattern of [125I]Tf from the CSF corresponded to that of [131I]albumin injected i.c.v., suggesting a nonselective washout of CSF proteins. [131I]Tf was hardly detectable in the brain, reflecting an unimpaired BBB during the experiments. Morphologically, 59Fe and i.c.v. injected human Tf were confined to the ventricular surface and meningeal areas, whereas grey matter regions at distances more than 2–3 mm from the ventricles and the subarachnoid space were unlabelled. However, accumulation of 59Fe was observed in the anterior thalamic and the medial habenular nuclei, and in brain regions with synaptic communications to these areas. In the newborn rats aged 7 days (P7) injected i.c.v. with [59Fe–125I]Tf and examined after 24 h, the amounts of [125I]Tf in CSF were approximately 3.5 times higher than in adult rats collected after the same time interval, whereas the amounts of 59Fe in CSF were at the same level in P7 and adult rats. In the brain tissue of the i.c.v. injected P7 rats, both [125I]Tf and 59Fe were retained to a significantly higher degree compared to that seen in adult brains. The rapid washout and lack of capability for i.c.v. injected [125I]Tf to penetrate deeply into the brain parenchyma of the adult brain question the importance of Tf of the CSF, and choroid plexus-derived Tf, for Fe neutralization and delivery of Fe–Tf to TfR-containing neurons and other cells in the CNS. However, it may serve these functions in young animals due to a lower rate of turnover of CSF." @default.
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• W2012124492 date "1998-04-01" @default.
• W2012124492 modified "2023-09-24" @default.
• W2012124492 title "Kinetics and distribution of [59Fe–125I]transferrin injected into the ventricular system of the rat" @default.
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• W2012124492 doi "https://doi.org/10.1016/s0006-8993(98)00055-9" @default.
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