Cited by 198Tuberculosis Research and EpidemiologyIron Metabolism and DisordersImmune responses and vaccinations

Correction of the Iron Overload Defect in β-2-Microglobulin Knockout Mice by Lactoferrin Abolishes Their Increased Susceptibility to Tuberculosis

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Schaible, Ulrich E., Collins, Helen L., Priem, Friedrich, Kaufmann, Stefan H.E.·2002·The Journal of Experimental Medicine

Abstract

As a resident of early endosomal phagosomes, Mycobacterium tuberculosis is connected to the iron uptake system of the host macrophage. β-2-microglobulin (β2m) knockout (KO) mice are more susceptible to tuberculosis than wild-type mice, which is generally taken as a proof for the role of major histocompatibility complex class I (MHC-I)–restricted CD8 T cells in protection against M. tuberculosis. However, β2m associates with a number of MHC-I–like proteins, including HFE. This protein regulates transferrin receptor mediated iron uptake and mutations in its gene cause hereditary iron overload (hemochromatosis). Accordingly, β2m-deficient mice suffer from tissue iron overload. Here, we show that modulating the extracellular iron pool in β2m–KO mice by lactoferrin treatment significantly reduces the burden of M. tuberculosis to numbers comparable to those observed in MHC class I–KO mice. In parallel, the generation of nitric oxide impaired in β2m–KO mice was rescued. Conversely, iron overload in the immunocompetent host exacerbated disease. Consistent with this, iron deprivation in infected resting macrophages was detrimental for intracellular mycobacteria. Our data establish: (a) defective iron metabolism explains the increased susceptibility of β2m-KO mice over MHC-I–KO mice, and (b) iron overload represents an exacerbating cofactor for tuberculosis.

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  • β2m-deficient mice develop greater M tuberculosis burden than WT mice, which can be reversed by treatment with lactoferrin.

    “It was previously reported that β2m-deficient mice, which have liver iron overload and aberrant major histocompatibility complex type I expression, develop greater M tuberculosis burden that WT mice, which can be reversed by treatment with lactoferrin.19”
  • Even with M. tuberculosis iron-acquisition factors, macrophage iron withholding effectively limits bacterial growth.

    “Even with the expression of M. tuberculosis iron-acquisition factors, macrophage iron withholding effectively aids in limiting bacterial growth (Schaible et al., 2002).”

    From The Impact of Dietary Transition Metals on Host-Bacterial Interactions (2018) · cites this paper as Schaible et al., 2002

  • Increased availability of iron promotes the growth of M. tuberculosis and exacerbates TB.

    “It is well-established that increased availability of iron promotes the growth of M. tuberculosis and exacerbates TB (163–166).”

    From Macrophage defense mechanisms against intracellular bacteria (2015) · cites this paper as [163]

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Authors
Schaible, U. E., Collins, H. L., Priem, F., & Kaufmann, S. H. E.
Affiliations
  • Max Planck Society (DE)
  • Humboldt-Universität zu Berlin (DE)
Corresponding author
Priem, Friedrich
Venue
The Journal of Experimental Medicine
Published
2002-11-25
Volume
196
Issue
11
Pages
1507-1513
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W1990564189
Cited by
198
References
30
Citations by year
2026: 3 · 2025: 5 · 2024: 1 · 2023: 8 · 2022: 6 · 2021: 9 · 2020: 6 · 2019: 13 · 2018: 4 · 2017: 10 · 2016: 6 · 2015: 9 · 2014: 8 · 2013: 10 · 2012: 10
Type
journal article
Language
en
Open access
Locations
  • The Journal of Experimental Medicine (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
  • LSHTM Research Online (London School of Hygiene and Tropical Medicine) (acceptedVersion)
  • Research Portal (King's College London) (submittedVersion)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Tuberculosis Research and Epidemiology
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
Keywords
beta2-microglobulin, lactoferrin, tuberculosis susceptibility, Mycobacterium tuberculosis, iron overload, hemochromatosis, HFE gene, MHC class I, CD8+ T cells, macrophages, nitric oxide, iron metabolism, phagosome, iron starvation
MeSH terms
Hemochromatosis Protein, Animals, beta 2-Microglobulin, Disease Susceptibility, Interferon-gamma, Lactoferrin, Macrophages, Membrane Proteins, Mycobacterium tuberculosis, Nitric Oxide, Receptors, Transferrin, Tuberculosis, Histocompatibility Antigens Class I, Mice, Knockout, Iron Overload, Mice

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