Cited by 48Iron Metabolism and DisordersFerroptosis and cancer prognosisNeurological diseases and metabolism

Sustained Hydrogen Peroxide Induces Iron Uptake by Transferrin Receptor-1 Independent of the Iron Regulatory Protein/Iron-responsive Element Network

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Andriopoulos, Bill, Hegedüsch, Stephan, Mangin, Julia, Riedel, Hans-Dieter, Hebling, Ulrike, Wang, Jian, Pantopoulos, Kostas, Mueller, Sebastian·2007·Journal of Biological Chemistry

Abstract

Local and systemic inflammatory conditions are characterized by the intracellular deposition of excess iron, which may promote tissue damage via Fenton chemistry. Because the Fenton reactant H(2)O(2) is continuously released by inflammatory cells, a tight regulation of iron homeostasis is required. Here, we show that exposure of cultured cells to sustained low levels of H(2)O(2) that mimic its release by inflammatory cells leads to up-regulation of transferrin receptor 1 (TfR1), the major iron uptake protein. The increase in TfR1 results in increased transferrin-mediated iron uptake and cellular accumulation of the metal. Although iron regulatory protein 1 is transiently activated by H(2)O(2), this response is not sufficient to stabilize TfR1 mRNA and to repress the synthesis of the iron storage protein ferritin. The induction of TfR1 is also independent of transcriptional activation via hypoxia-inducible factor 1alpha or significant protein stabilization. In contrast, pulse experiments with (35)S-labeled methionine/cysteine revealed an increased rate of TfR1 synthesis in cells exposed to sustained low H(2)O(2) levels. Our results suggest a novel mechanism of iron accumulation by sustained H(2)O(2), based on the translational activation of TfR1, which could provide an important (patho) physiological link between iron metabolism and inflammation.

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Crossref · 10.1074/jbc.m702463200

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Authors
Andriopoulos, B., Hegedüsch, S., Mangin, J., Riedel, H.-D., Hebling, U., Wang, J., Pantopoulos, K., & Mueller, S.
Affiliations
  • Heidelberg University (DE)
  • Jewish General Hospital (CA)
  • Beth Israel Deaconess Medical Center (US)
Corresponding author
Mueller, Sebastian
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2007-07
Volume
282
Issue
28
Pages
20301-20308
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2086246137
Cited by
48
References
61
Citations by year
2024: 3 · 2023: 3 · 2022: 2 · 2018: 3 · 2017: 2 · 2016: 1 · 2015: 2 · 2014: 2 · 2013: 4 · 2012: 2
FWCI
3.62
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Ferroptosis and cancer prognosis
  • Life Sciences › Neuroscience › Neurology › Neurological diseases and metabolism
Keywords
hydrogen peroxide, transferrin receptor 1, iron absorption, iron homeostasis, iron regulatory protein 1, iron-responsive element, inflammation, ferritin, Fenton reaction, translational activation, hypoxia-inducible factor-1α, protein synthesis
MeSH terms
Ferritins, HeLa Cells, Homeostasis, Humans, Hydrogen Peroxide, Inflammation, Iron, Receptors, Transferrin, Transferrin, Protein Biosynthesis, Transcriptional Activation, Antigens, CD, Up-Regulation, Response Elements, Iron-Regulatory Proteins

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