Cited by 1,026Iron Metabolism and DisordersPlant Micronutrient Interactions and EffectsNeurological diseases and metabolism

Bone morphogenetic protein signaling by hemojuvelin regulates hepcidin expression

Babitt, Jodie L, Huang, Franklin W, Wrighting, Diedra M, Xia, Yin, Sidis, Yisrael, Samad, Tarek A, Campagna, Jason A, Chung, Raymond T +4 more·2006·Nature Genetics

Abstract

Hepcidin is a key regulator of systemic iron homeostasis. Hepcidin deficiency induces iron overload, whereas hepcidin excess induces anemia. Mutations in the gene encoding hemojuvelin (HFE2, also known as HJV) cause severe iron overload and correlate with low hepcidin levels, suggesting that hemojuvelin positively regulates hepcidin expression. Hemojuvelin is a member of the repulsive guidance molecule (RGM) family, which also includes the bone morphogenetic protein (BMP) coreceptors RGMA and DRAGON (RGMB). Here, we report that hemojuvelin is a BMP coreceptor and that hemojuvelin mutants associated with hemochromatosis have impaired BMP signaling ability. Furthermore, BMP upregulates hepatocyte hepcidin expression, a process enhanced by hemojuvelin and blunted in Hfe2-/- hepatocytes. Our data suggest a mechanism by which HFE2 mutations cause hemochromatosis: hemojuvelin dysfunction decreases BMP signaling, thereby lowering hepcidin expression.

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Crossref · 10.1038/ng1777

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  • HFE, hemojuvelin, or TfR2 on the hepatocyte membrane impact hepcidin expression via the BMP-SMAD pathway.

    “The latter is due to the fact, that several co-factors expressed on the hepatocyte cell membrane such as HFE, hemojuvelin (HJV) or TfR2 impact on hepcidin expression via the BMP-SMAD pathway (Babitt et al., 2006).”

    From The Role of Iron Regulation in Immunometabolism and Immune-Related Disease (2019) · cites this paper as Babitt et al., 2006

  • Regulation of hepcidin by iron depends on the HJV and BMPR complex activating the SMAD signaling pathway.

    “Regulation of hepcidin by iron depends on the hemojuvelin (HJV) and bone morphogenetic protein receptor (BMPR) complex activating the SMAD signaling pathway (Fig 3) [13–15].”

    From Hepcidin and Host Defense against Infectious Diseases (2015) · cites this paper as [13]

  • HJV is a BMP co-receptor that enhances iron signaling to hepcidin.

    “HJV is a BMP co-receptor that enhances iron signaling to hepcidin (Babitt et al., 2006).”

    From Pharmacological Targeting of the Hepcidin/Ferroportin Axis (2016) · cites this paper as Babitt et al., 2006

  • Bone morphogenetic protein-6 binds to a heterodimeric receptor complexed with hemojuvelin and matriptase-2, and stimulates hepcidin expression.

    “BMP6 binds to a heterodimeric receptor complexed with hemojuvelin (HJV) and matriptase-2 (the gene product of TMPRSS6), and stimulates HAMP expression [66, 67].”
  • BMP treatment is a potent stimulus for hepcidin expression both in cultured cells and in animals.

    “Nonetheless, BMP treatment is a potent stimulus for hepcidin expression both in cultured cells 113,114,116,117 and in animals.”

    From Forging a field: the golden age of iron biology. (2008) · cites this paper as [114]

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Authors
Babitt, J. L., Huang, F. W., Wrighting, D. M., Xia, Y., Sidis, Y., Samad, T. A., Campagna, J. A., Chung, R. T., Schneyer, A. L., Woolf, C. J., Andrews, N. C., & Lin, H. Y.
Affiliations
  • Harvard University (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Lin, Herbert Y
Venue
Nature Genetics
Published
2006-04-09
Volume
38
Issue
5
Pages
531-539
ISSN
  • 1061-4036 (ISSN-L)
  • 1546-1718
OpenAlex
W2050833520
Cited by
1,026
References
52
Citations by year
2026: 17 · 2025: 23 · 2024: 21 · 2023: 22 · 2022: 21 · 2021: 54 · 2020: 35 · 2019: 39 · 2018: 39 · 2017: 50 · 2016: 44 · 2015: 50 · 2014: 58 · 2013: 62 · 2012: 67
FWCI
49.84
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Genetics (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Heart, Lung, and Blood Institute (T32HL07623, T32HL007623)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-71837, R01DK066373, DK-69533, K08DK075846, R01DK071837, F32DK068997, R01DK069533)
Topics
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Micronutrient Interactions and Effects
  • Life Sciences › Neuroscience › Neurology › Neurological diseases and metabolism
Keywords
hemojuvelin, hepcidin, BMP signaling, iron homeostasis, hemochromatosis, RGMa, dragons, hepatocytes, iron overload, anemia
MeSH terms
Hemochromatosis Protein, Amino Acid Sequence, Animals, Gene Expression Regulation, Cricetinae, Humans, Liver, Membrane Proteins, Molecular Sequence Data, Mutation, Signal Transduction, Polymerase Chain Reaction, Transforming Growth Factor beta, CHO Cells, Bone Morphogenetic Proteins, Antimicrobial Cationic Peptides, Bone Morphogenetic Protein 2, GPI-Linked Proteins, Hepcidins

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