Cited by 437Iron Metabolism and DisordersTGF-β signaling in diseasesPlant Micronutrient Interactions and Effects

Iron regulates phosphorylation of Smad1/5/8 and gene expression of Bmp6, Smad7, Id1, and Atoh8 in the mouse liver

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Kautz, Léon, Meynard, Delphine, Monnier, Annabelle, Darnaud, Valérie, Bouvet, Régis, Wang, Rui-Hong, Deng, Chiuxia, Vaulont, Sophie +3 more·2008·Blood

Abstract

Although hepcidin expression was shown to be induced by the BMP/Smad signaling pathway, it is not yet known how iron regulates this pathway and what its exact molecular targets are. We therefore assessed genome-wide liver transcription profiles of mice of 2 genetic backgrounds fed iron-deficient, -balanced, or -enriched diets. Among 1419 transcripts significantly modulated by the dietary iron content, 4 were regulated similarly to the hepcidin genes Hamp1 and Hamp2. They are coding for Bmp6, Smad7, Id1, and Atoh8 all related to the Bmp/Smad pathway. As shown by Western blot analysis, variations in Bmp6 expression induced by the diet iron content have for functional consequence similar changes in Smad1/5/8 phosphorylation that leads to formation of heteromeric complexes with Smad4 and their translocation to the nucleus. Gene expression variations induced by secondary iron deficiency or iron overload were compared with those consecutive to Smad4 and Hamp1 deficiency. Iron overload developed by Smad4- and Hamp1-deficient mice also increased Bmp6 transcription. However, as shown by analysis of mice with liver-specific disruption of Smad4, activation of Smad7, Id1, and Atoh8 transcription by iron requires Smad4. This study points out molecules that appear to play a critical role in the control of systemic iron balance.

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Crossref · 10.1182/blood-2008-03-143354

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  • BMP6 expression is regulated by iron, possibly in the context of an antioxidant response, controlled by NRF2.

    “BMP6 expression is regulated by iron,42 possibly in the context of an antioxidant response, controlled by NRF2.43”

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Authors
Kautz, L., Meynard, D., Monnier, A., Darnaud, V., Bouvet, R., Wang, R.-H., Deng, C., Vaulont, S., Mosser, J., Coppin, H., & Roth, M.-P.
Affiliations
  • Université Toulouse III - Paul Sabatier (FR)
  • Centre National de la Recherche Scientifique (FR)
  • Centre Hospitalier Universitaire de Rennes (FR)
  • Genetics of Development and Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD;
  • National Institutes of Health (US)
Venue
Blood
Published
2008-08-15
Volume
112
Issue
4
Pages
1503-1509
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W2049917711
Cited by
437
References
12
Citations by year
2026: 10 · 2025: 11 · 2024: 10 · 2023: 23 · 2022: 24 · 2021: 21 · 2020: 21 · 2019: 26 · 2018: 18 · 2017: 28 · 2016: 25 · 2015: 20 · 2014: 26 · 2013: 31 · 2012: 27
FWCI
24.81
Type
journal article
Language
en
Open access
Locations
  • Blood (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
  • Association pour la Recherche sur le Cancer
  • European Commission (LSHM-CT-2006-037296)
  • Agence Nationale de la Recherche (ANR-05-MRAR-0031)
Topics
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Micronutrient Interactions and Effects
Keywords
iron regulation, BMP/Smad signaling, Smad1/5/8 phosphorylation, BMP6, Smad7, Id1, ATOH8, hepcidin, SMAD4, iron deficiency, iron overload, hepatic gene expression, dietary iron
MeSH terms
Animals, Diet, Iron, Liver, Male, Phosphorylation, Transcription, Genetic, Signal Transduction, Mice, Knockout, Iron Overload, Bone Morphogenetic Proteins, Gene Expression Profiling, Active Transport, Cell Nucleus, Mice, Smad Proteins, Basic Helix-Loop-Helix Proteins, Basic Helix-Loop-Helix Transcription Factors, Smad1 Protein, Smad4 Protein, Smad5 Protein, Smad8 Protein, Smad7 Protein, Bone Morphogenetic Protein 6

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