Endothelial cells are critical regulators of iron transport in a model of the human blood–brain barrier

Brian Chiou, Emma H. Neal, Aaron B. Bowman, Ethan S. Lippmann, Ian A. Simpson, James R. Connor

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Iron delivery to the brain is essential for multiple neurological processes such as myelination, neurotransmitter synthesis, and energy production. Loss of brain iron homeostasis is a significant factor in multiple neurological disorders. Understanding the mechanism by which the transport of iron across the blood–brain barrier (BBB) is regulated is crucial to address the impact of iron deficiency on brain development and excessive accumulation of iron in neurodegenerative diseases. Using induced pluripotent stem cell (iPSC)-derived brain endothelial cells (huECs) as a human BBB model, we demonstrate the ability of transferrin, hepcidin, and DMT1 to impact iron transport and release. Our model reveals a new function for H-ferritin to transport iron across the BBB by binding to the T-cell immunoglobulin and mucin receptor 1. We show that huECs secrete both transferrin and H-ferritin, which can serve as iron sources for the brain. Based on our data, brain iron status can exert control of iron transport across the endothelial cells that constitute the BBB. These data address a number of pertinent questions such as how brain iron uptake is regulated at the regional level, the source of iron delivery to the brain, and the clinical strategies for attempting to treat brain iron deficiency.

Original languageEnglish (US)
Pages (from-to)2117-2131
Number of pages15
JournalJournal of Cerebral Blood Flow and Metabolism
Volume39
Issue number11
DOIs
StatePublished - Nov 1 2019

Fingerprint

Iron
Endothelial Cells
Brain
Apoferritins
Transferrin
Hepcidins
Induced Pluripotent Stem Cells
Mucin-1
T-Cell Antigen Receptor
Nervous System Diseases
Neurodegenerative Diseases
Neurotransmitter Agents
Immunoglobulins
Homeostasis

All Science Journal Classification (ASJC) codes

  • Neurology
  • Clinical Neurology
  • Cardiology and Cardiovascular Medicine

Cite this

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abstract = "Iron delivery to the brain is essential for multiple neurological processes such as myelination, neurotransmitter synthesis, and energy production. Loss of brain iron homeostasis is a significant factor in multiple neurological disorders. Understanding the mechanism by which the transport of iron across the blood–brain barrier (BBB) is regulated is crucial to address the impact of iron deficiency on brain development and excessive accumulation of iron in neurodegenerative diseases. Using induced pluripotent stem cell (iPSC)-derived brain endothelial cells (huECs) as a human BBB model, we demonstrate the ability of transferrin, hepcidin, and DMT1 to impact iron transport and release. Our model reveals a new function for H-ferritin to transport iron across the BBB by binding to the T-cell immunoglobulin and mucin receptor 1. We show that huECs secrete both transferrin and H-ferritin, which can serve as iron sources for the brain. Based on our data, brain iron status can exert control of iron transport across the endothelial cells that constitute the BBB. These data address a number of pertinent questions such as how brain iron uptake is regulated at the regional level, the source of iron delivery to the brain, and the clinical strategies for attempting to treat brain iron deficiency.",
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Endothelial cells are critical regulators of iron transport in a model of the human blood–brain barrier. / Chiou, Brian; Neal, Emma H.; Bowman, Aaron B.; Lippmann, Ethan S.; Simpson, Ian A.; Connor, James R.

In: Journal of Cerebral Blood Flow and Metabolism, Vol. 39, No. 11, 01.11.2019, p. 2117-2131.

Research output: Contribution to journalArticle

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