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Updated: May 20, 2026

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Murine macrophages response to iron.

Rita Polati1, Annalisa Castagna, Alessandra Maria Bossi

  • 1University of Verona, Department of Biotechnology, Strada Le Grazie 15, 37134 Verona, Italy. polati.rita@gmail.com

Journal of Proteomics
|July 28, 2012
PubMed
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This study reveals how macrophages manage iron, identifying key proteins like ferritins and GAPDH involved in iron uptake and homeostasis. Integrated omics approaches highlight oxidative stress responses during iron management.

Area of Science:

  • Cell biology
  • Iron metabolism
  • Immunology

Background:

  • Macrophages are crucial for iron metabolism and immunity, storing and recycling iron from aged red blood cells.
  • The precise mechanisms of non-heme iron management by macrophages at physiological levels remain unclear.

Purpose of the Study:

  • To investigate protein expression changes in mouse bone marrow macrophages exposed to ferric ammonium citrate (FAC).
  • To elucidate molecular mechanisms controlling iron homeostasis in macrophages using integrated omics.

Main Methods:

  • Proteomic analysis using nano RP-HPLC-ESI-MS/MS.
  • Complementary transcriptomic, metabolomic, and western immunoblotting analyses.
  • Pattern analysis to identify protein networks involved in iron homeostasis.

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Main Results:

  • FAC treatment increased abundance of proteins such as ferritins, cytoskeleton proteins, membrane-bound glyceraldehyde-3-phosphate dehydrogenase (GAPDH), vimentin, arginase, galectin-3, and macrophage migration inhibitory factor (MIF).
  • GAPDH's potential role as an alternative transferrin receptor for iron acquisition was highlighted.
  • Up-regulation of oxidative stress markers (PRDX) and metabolic changes (increased GSSG, 8-isoprostane, pentose phosphate pathway intermediates) were confirmed.

Conclusions:

  • Integrated omics approaches are valuable for studying iron biology and homeostasis.
  • The study provides insights into macrophage iron management, including potential novel iron uptake pathways and oxidative stress responses.