Cited by 452Iron Metabolism and DisordersNeurological diseases and metabolismTrace Elements in Health

Serum ferritin is derived primarily from macrophages through a nonclassical secretory pathway

Cohen, Lyora A., Gutierrez, Lucia, Weiss, Avital, Leichtmann-Bardoogo, Yael, Zhang, De-liang, Crooks, Daniel R., Sougrat, Rachid, Morgenstern, Avigail +5 more·2010·Blood

Abstract

The serum ferritin concentration is a clinical parameter measured widely for the differential diagnosis of anemia. Its levels increase with elevations of tissue iron stores and with inflammation, but studies on cellular sources of serum ferritin as well as its subunit composition, degree of iron loading and glycosylation have given rise to conflicting results. To gain further understanding of serum ferritin, we have used traditional and modern methodologies to characterize mouse serum ferritin. We find that both splenic macrophages and proximal tubule cells of the kidney are possible cellular sources for serum ferritin and that serum ferritin is secreted by cells rather than being the product of a cytosolic leak from damaged cells. Mouse serum ferritin is composed mostly of L-subunits, whereas it contains few H-subunits and iron content is low. L-subunits of serum ferritin are frequently truncated at the C-terminus, giving rise to a characteristic 17-kD band that has been previously observed in lysosomal ferritin. Taken together with the fact that mouse serum ferritin is not detectably glycosylated, we propose that mouse serum ferritin is secreted through the nonclassical lysosomal secretory pathway.

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Crossref · 10.1182/blood-2009-11-253815

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Authors
Cohen, L. A., Gutierrez, L., Weiss, A., Leichtmann-Bardoogo, Y., Zhang, D.-L., Crooks, D. R., Sougrat, R., Morgenstern, A., Galy, B., Hentze, M. W., Lazaro, F. J., Rouault, T. A., & Meyron-Holtz, E. G.
Affiliations
  • Technion – Israel Institute of Technology (IL)
  • Departamento de Ciencia y Tecnología de Materiales y Fluidos, Universidad de Zaragoza, Zaragoza, Spain;
  • Laboratory for Molecular Nutrition, Faculty of Biotechnology and Food Engineering, Technion, Technion City, Haifa, Israel;
  • Molecular Medicine Program and
  • National Institutes of Health (US)
  • European Molecular Biology Laboratory (DE)
Venue
Blood
Published
2010-09-02
Volume
116
Issue
9
Pages
1574-1584
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W2153170511
Cited by
452
References
53
Citations by year
2026: 8 · 2025: 34 · 2024: 33 · 2023: 30 · 2022: 43 · 2021: 45 · 2020: 35 · 2019: 34 · 2018: 31 · 2017: 24 · 2016: 23 · 2015: 33 · 2014: 18 · 2013: 24 · 2012: 17
FWCI
11.41
Type
journal article
Language
en
Open access
closed
Locations
  • Blood (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Life Sciences › Neuroscience › Neurology › Neurological diseases and metabolism
  • Health Sciences › Nursing › Nutrition and Dietetics › Trace Elements in Health
Keywords
serum ferritin, macrophages, lysosomal secretion, L subunit, H subunit, C-terminal truncation, glycosylation, proximal tubular epithelial cells, splenic macrophages, iron stores, mice
MeSH terms
Amino Acid Sequence, Animals, Enzyme-Linked Immunosorbent Assay, Ferritins, Glycosylation, Iron, Lysosomes, Macrophages, Male, Mice, Inbred C57BL, Molecular Sequence Data, Sequence Homology, Amino Acid, Iron Overload, Protein Subunits, Mice, Secretory Pathway

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