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Updated: Jul 18, 2026
07:32
Assessing Iron Deposition in the Brains of 5xFAD Mice by Perls'/DAB Staining
Published on: May 23, 2025
Brain iron metabolism.
Tracey A Rouault1, Sharon Cooperman
1Cell Biology and Metabolism Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA. trou@helix.nih.gov
Seminars in Pediatric Neurology
|November 15, 2006
Summary
Brain iron transport involves transferrin receptor 1 and ferroportin. Iron accumulation in aging brains may cause functional iron deficiency, contributing to neurodegenerative diseases like Parkinson and Alzheimer disease.
Area of Science:
- Neuroscience
- Biochemistry
- Cell Biology
Background:
- Brain iron uptake is crucial for neuronal function.
- Dysregulation of iron homeostasis is implicated in neurodegenerative diseases.
- The blood-brain barrier plays a key role in regulating iron entry into the brain.
Purpose of the Study:
- To elucidate the mechanisms of iron transport across the blood-brain barrier.
- To explore the role of iron accumulation in aging and neurodegeneration.
- To investigate the potential for functional iron deficiency in iron-accumulating diseases.
Main Methods:
- The study discusses the roles of transferrin receptor 1 (TfR1) in endothelial cells.
- It highlights the function of ferroportin as an iron exporter.
- It mentions the involvement of ceruloplasmin in iron oxidation and transferrin binding.
Main Results:
- Transferrin-bound iron enters brain endothelial cells via endocytosis.
- Iron is released into the brain interstitial fluid by ferroportin.
- Oligodendrocyte-synthesized transferrin and astrocytic ceruloplasmin are involved in brain iron handling.
Conclusions:
- Iron accumulation in aging brains, particularly in the basal ganglia, is linked to neurodegenerative conditions.
- Pathological iron accumulations may represent functionally unavailable iron, leading to cellular iron deficiency.
- This functional deficiency, rather than excess iron, could drive oxidative damage and disease pathology.
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