Cited by 283Bone Metabolism and DiseasesMitochondrial Function and PathologyImmune cells in cancer

Mitochondrial Complex I Activity Suppresses Inflammation and Enhances Bone Resorption by Shifting Macrophage-Osteoclast Polarization

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Jin, Zixue, Wei, Wei, Yang, Marie, Du, Yang, Wan, Yihong·2014·Cell Metabolism

Abstract

Mitochondrial complex I (CI) deficiency is associated with multiple neurological and metabolic disorders. However, its effect on innate immunity and bone remodeling is unclear. Using deletion of the essential CI subunit Ndufs4 as a model for mitochondrial dysfunction, we report that mitochondria suppress macrophage activation and inflammation while promoting osteoclast differentiation and bone resorption via both cell-autonomous and systemic regulation. Global Ndufs4 deletion causes systemic inflammation and osteopetrosis. Hematopoietic Ndufs4 deletion causes an intrinsic lineage shift from osteoclast to macrophage. Liver Ndufs4 deletion causes a metabolic shift from fatty acid oxidation to glycolysis, accumulating fatty acids and lactate (FA/LAC) in the circulation. FA/LAC further activates Ndufs4(-/-) macrophages via reactive oxygen species induction and diminishes osteoclast lineage commitment in Ndufs4(-/-) progenitors; both inflammation and osteopetrosis in Ndufs4(-/-) mice are attenuated by TLR4/2 deletion. Together, these findings reveal mitochondrial CI as a critical rheostat of innate immunity and skeletal homeostasis.

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Crossref · 10.1016/j.cmet.2014.07.011

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  • Succinylation is evolutionarily conserved and its substrates are numerous, including proteins involved in cellular metabolism.

    “Western blot analysis of whole cell lysates revealed that this modification is evolutionarily conserved and that substrates are numerous39 and include proteins involved in cellular metabolism38.”
  • Treatment of mouse fibroblasts with the SDH inhibitor 3-nitropropionic acid increases succinylation.

    “Treatment of mouse fibroblasts with the SDH inhibitor 3-nitropropionic acid increases succinylation38.”
  • Lysine succinylation is caused by accumulation of succinyl-CoA, which can result from SDH inhibition and succinate accumulation.

    “This modification is caused by the accumulation of succinyl-CoA, which can result from SDH inhibition and succinate accumulation38.”

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Authors
Jin, Z., Wei, W., Yang, M., Du, Y., & Wan, Y.
Affiliations
The University of Texas Southwestern Medical Center (US)
Corresponding author
Wan, Yihong
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2014-09
Volume
20
Issue
3
Pages
483-498
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2018576241
Cited by
283
References
53
Citations by year
2026: 28 · 2025: 31 · 2024: 26 · 2023: 33 · 2022: 26 · 2021: 39 · 2020: 24 · 2019: 20 · 2018: 15 · 2017: 17 · 2016: 12 · 2015: 10 · 2014: 2
FWCI
5.60
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (R01DK089113)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bone Metabolism and Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
Keywords
mitochondrial complex I, NDUFS4, mitochondrial dysfunction, macrophage polarization, osteoclastogenesis, bone resorption, osteopetrosis, inflammation, fatty acid oxidation, glycolysis, lactate, reactive oxygen species, innate immunity, skeletal homeostasis, hematopoietic cells, liver
MeSH terms
Alopecia, Animals, Bone Resorption, Cell Differentiation, Fatty Acids, Female, Glycolysis, Immunity, Innate, Macrophage Activation, Macrophages, Male, Mice, Inbred C57BL, Mitochondria, Osteoclasts, Gene Deletion, Reactive Oxygen Species, Mitochondrial Diseases, Electron Transport Complex I, Mice

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