Induction of Nramp2 in activated mouse macrophages is dissociated from regulation of the Nramp1, classical inflammatory genes, and genes involved in iron metabolism

S. L. Wardrop, C. Wells, T. Ravasi, D. A. Hume*, D. R. Richardson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Nramp2 is a widely expressed metal-ion transporter that is involved in dietary iron absorption in the duodenum and iron uptake from transferrin in peripheral tissues. Nramp1 is a related gene involved in regulation of host pathogen interaction. Nramp2 has at least two alternatively spliced isoforms, one of which contains an iron-responsive element in its 3′-untranslated region. In this study, we investigated the regulation of both isoforms of Nramp2 in activated primary macrophages from mouse strains with wild-type (Bcgr) or mutant (Bcgs) alleles. The Nramp2-IRE and/or -nonIRE transcripts were up-regulated in all mouse strains analyzed after treatment with interferon-γ and lipopolysaccharide. cDNA microarray analysis revealed that Nramp2 regulation is controlled discordantly from other iron-regulated genes and classical macrophage-activation genes in different mouse strains. We suggest that Nramp2 is regulated independently of known iron-responsive genes in macrophages, and its function in host defense is unrelated to Nramp1.

Original languageEnglish (US)
Pages (from-to)99-106
Number of pages8
JournalJournal of Leukocyte Biology
Issue number1
StatePublished - 2002
Externally publishedYes


  • 3′UTR
  • Ferritin
  • iNOS
  • Transferrin receptor

ASJC Scopus subject areas

  • Immunology
  • Cell Biology

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