Cited by 1,789Mitochondrial Function and PathologyMetabolism and Genetic DisordersRedox biology and oxidative stress

Dilated cardiomyopathy and neonatal lethality in mutant mice lacking manganese superoxide dismutase

Li, Yibing, Huang, Ting-Ting, Carlson, Elaine J., Melov, Simon, Ursell, Philip C., Olson, Jean L., Noble, Linda J., Yoshimura, Midori P. +4 more·1995·Nature Genetics

Abstract

The Sod2 gene for Mn-superoxide dismutase (MnSOD), an intramitochondrial free radical scavenging enzyme that is the first line of defense against superoxide produced as a byproduct of oxidative phosphorylation, was inactivated by homologous recombination. Homozygous mutant mice die within the first 10 days of life with a dilated cardiomyopathy, accumulation of lipid in liver and skeletal muscle, and metabolic acidosis. Cytochemical analysis revealed a severe reduction in succinate dehydrogenase (complex II) and aconitase (a TCA cycle enzyme) activities in the heart and, to a lesser extent, in other organs. These findings indicate that MnSOD is required for normal biological function of tissues by maintaining the integrity of mitochondrial enzymes susceptible to direct inactivation by superoxide.

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Crossref · 10.1038/ng1295-376

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Authors
Li, Y., Huang, T.-T., Carlson, E. J., Melov, S., Ursell, P. C., Olson, J. L., Noble, L. J., Yoshimura, M. P., Berger, C., Chan, P. H., Wallace, D. C., & Epstein, C. J.
Affiliations
  • University of California, San Francisco (US)
  • Emory University (US)
  • Children's Medical Research Institute (AU)
Venue
Nature Genetics
Published
1995-12
Volume
11
Issue
4
Pages
376-381
ISSN
  • 1061-4036 (ISSN-L)
  • 1546-1718
OpenAlex
W2094655287
Cited by
1,789
References
32
Citations by year
2026: 20 · 2025: 35 · 2024: 23 · 2023: 31 · 2022: 32 · 2021: 48 · 2020: 39 · 2019: 36 · 2018: 42 · 2017: 52 · 2016: 58 · 2015: 62 · 2014: 102 · 2013: 87 · 2012: 101
FWCI
9.79
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Genetics (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Aging (P30AG010130, AG-10130, AG-13154, AG-08938, P01AG008938, R01AG013154)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Metabolism and Genetic Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
manganese superoxide dismutase, dilated cardiomyopathy, neonatal lethality, mitochondrial superoxide, oxidative phosphorylation, succinate dehydrogenase, complex II, aconitase, TCA cycle, lipid accumulation, metabolic acidosis, Sod2 knockout mice
MeSH terms
Acidosis, Animals, Animals, Newborn, Base Sequence, Cardiomyopathy, Dilated, Electron Transport Complex IV, Genes, Lethal, Homozygote, Lipids, Liver, Mice, Mutant Strains, Mitochondria, Heart, Mitochondria, Muscle, Molecular Sequence Data, Succinate Dehydrogenase, Superoxide Dismutase, Lipid Peroxidation, Sequence Deletion, Gene Targeting, Muscle, Skeletal, Mice

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