Cited by 311Iron Metabolism and DisordersErythropoietin and Anemia TreatmentHemoglobin structure and function

The DOI matches its Crossref record; 35 of the 36 references it cites were found in a registry or an index.

Furin-mediated release of soluble hemojuvelin: a new link between hypoxia and iron homeostasis

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Abstract

The liver peptide hepcidin regulates iron absorption and recycling. Hemojuvelin (HJV) has a key role in hepcidin regulation, and its inactivation causes severe iron overload both in humans and in mice. Membrane HJV (m-HJV) acts as a coreceptor for bone morphogenetic proteins (BMPs), whereas soluble HJV (s-HJV) may down-regulate hepcidin in a competitive way interfering with BMP signaling. s-HJV is decreased by iron in vitro and increased by iron deficiency in vivo. However, the mechanisms regulating the 2 HJV isoforms remain unclear. Here we show that s-HJV originates from a furin cleavage at position 332-335. s-HJV is reduced in the cleavage mutant R335Q as well as in cells treated with a furin inhibitor, and increased in cells overexpressing exogenous furin, but not in cells overexpressing an inactive furin variant. Furin is up-regulated by iron deficiency and hypoxia in association with the stabilization of HIF-1alpha. Increased s-HJV in response to HIF-1alpha occurs during differentiation of murine muscle cells expressing endogenous Hjv. Our data are relevant to the mechanisms that relate iron metabolism to the hypoxic response. The release of s-HJV might be a tissue-specific mechanism, signaling the local iron requests of hypoxic skeletal muscles independently of the oxygen status of the liver.

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Crossref · 10.1182/blood-2007-07-100677

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  • In hypoxia hepcidin is also suppressed in vitro by soluble hemojuvelin, released by furin, an effect unclear in vivo, and by platelet-derived growth factor-BB in volunteers exposed to hypoxia.

    “In hypoxia hepcidin is also suppressed in vitro by soluble hemojuvelin, released by furin,53 an effect unclear in vivo, and by platelet-derived growth factor-BB in volunteers exposed to hypoxia.54”
  • HIF induces furin, which cleaves HJV and generates a soluble form of HJV, which suppresses hepcidin by antagonizing BMP6 signaling.

    “Recent in vivo studies have shown that HIF induces furin, a proprotein convertase that cleaves HJV and generates a soluble form of HJV, which suppresses hepcidin by antagonizing BMP6 signaling.”

    From Regulation of erythropoiesis by hypoxia-inducible factors (2013) · cites this paper as [203]

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Metadata

Authors
Silvestri, L., Pagani, A., & Camaschella, C.
Affiliations
Vita-Salute San Raffaele University (IT)
Venue
Blood
Published
2008-01-15
Volume
111
Issue
2
Pages
924-931
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W2005438156
Cited by
311
References
36
Citations by year
2026: 1 · 2025: 4 · 2024: 11 · 2023: 3 · 2022: 10 · 2021: 18 · 2020: 12 · 2019: 16 · 2018: 16 · 2017: 16 · 2016: 13 · 2015: 17 · 2014: 16 · 2013: 27 · 2012: 20
FWCI
17.97
Type
journal article
Language
en
Open access
Locations
  • Blood (publishedVersion)
  • PubMed (publishedVersion)
  • INFM-OAR (INFN Catania) (submittedVersion, other-oa)
Topics
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Health Sciences › Medicine › Hematology › Erythropoietin and Anemia Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Hemoglobin structure and function
Keywords
hemojuvelin, furin, proteolytic cleavage, hypoxia, iron homeostasis, hepcidin, HIF-1α, iron deficiency, BMP signaling, skeletal muscle, myogenesis, iron overload
MeSH terms
Hemochromatosis Protein, Iron Deficiencies, Animals, Cell Differentiation, HeLa Cells, Homeostasis, Humans, Iron, Liver, Membrane Proteins, Organ Specificity, Oxygen, Signal Transduction, Down-Regulation, Cell Hypoxia, Muscle, Skeletal, Iron Overload, Bone Morphogenetic Proteins, Amino Acid Substitution, Protein Isoforms, Mutation, Missense, Antimicrobial Cationic Peptides, Muscle Cells, Furin, Mice, Hypoxia-Inducible Factor 1, alpha Subunit, GPI-Linked Proteins, Hepcidins

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