Cited by 195Iron Metabolism and DisordersTrace Elements in HealthNeurological diseases and metabolism

Iron regulatory proteins are essential for intestinal function and control key iron absorption molecules in the duodenum

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Galy, Bruno, Ferring-Appel, Dunja, Kaden, Sylvia, Gröne, Hermann-Josef, Hentze, Matthias W.·2008·Cell Metabolism

Abstract

Iron regulatory proteins (IRPs) orchestrate the posttranscriptional regulation of critical iron metabolism proteins at the cellular level. Redundancy between IRP1 and IRP2 associated with embryonic lethality of doubly IRP-deficient mice has precluded the study of IRP function in vivo. Here we use Cre/Lox technology to generate viable organisms lacking IRP expression in a single tissue, the intestine. Mice lacking intestinal IRP expression develop intestinal malabsorption and dehydration postnatally and die within 4 weeks of birth. We demonstrate that IRPs control the expression of divalent metal transporter 1 (DMT1) mRNA and protein, a limiting intestinal iron importer. IRPs are also shown to be critically important to secure physiological levels of the basolateral iron exporter ferroportin. IRPs are thus essential for intestinal function and organismal survival and coordinate the synthesis of key iron metabolism proteins in the duodenum.

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Crossref · 10.1016/j.cmet.2007.10.006

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  • Mice lacking IRPs completely in hepatocytes or duodenal enterocytes die early after birth, showing IRPs are needed for organismal survival.

    “Earlier work investigating mice with complete IRP deficiency in hepatocytes or duodenal enterocytes, respectively, had shown early post-natal death in both cases, reflecting essential functions of the IRPs for organismal survival (Galy et al., 2008, 2010).”

    From Iron Regulatory Proteins Mediate Host Resistance to Salmonella Infection (2015) · cites this paper as Galy et al., 2008

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Authors
Galy, B., Ferring-Appel, D., Kaden, S., Gröne, H.-J., & Hentze, M. W.
Affiliations
  • European Molecular Biology Laboratory (DE)
  • German Cancer Research Center (DE)
Corresponding author
Hentze, Matthias W.
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2008-01
Volume
7
Issue
1
Pages
79-85
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2031180114
Cited by
195
References
32
Citations by year
2026: 6 · 2025: 8 · 2024: 5 · 2023: 10 · 2022: 7 · 2021: 5 · 2020: 12 · 2019: 6 · 2018: 9 · 2017: 7 · 2016: 4 · 2015: 7 · 2014: 15 · 2013: 14 · 2012: 15
FWCI
14.07
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Health Sciences › Nursing › Nutrition and Dietetics › Trace Elements in Health
  • Life Sciences › Neuroscience › Neurology › Neurological diseases and metabolism
Keywords
iron regulatory proteins, iron regulatory protein 1, IRP2, intestinal iron absorption, duodenum, DMT1, ferroportin, post-transcriptional regulation, iron metabolism, malabsorption, tissue-specific knockout mice, Cre-loxP recombination
MeSH terms
Ferroportin, Solute Carrier Family 11, Member 2, Animals, Duodenum, Epithelial Cells, Intestinal Mucosa, Intestines, Iron, Mice, Transgenic, Immunoblotting, Polymerase Chain Reaction, Cation Transport Proteins, Iron-Regulatory Proteins, Iron Regulatory Protein 1, Iron Regulatory Protein 2, Microscopy, Electron, Transmission, Mice

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