Cited by 738Genetic Neurodegenerative DiseasesMitochondrial Function and PathologyNeurological diseases and metabolism

Mouse models for Friedreich ataxia exhibit cardiomyopathy, sensory nerve defect and Fe-S enzyme deficiency followed by intramitochondrial iron deposits

Puccio, Hélène, Simon, Delphine, Cossée, Mireille, Criqui-Filipe, Paola, Tiziano, Francesco, Melki, Judith, Hindelang, Colette, Matyas, Robert +2 more·2001·Nature Genetics

Abstract

Friedreich ataxia (FRDA), the most common autosomal recessive ataxia, is characterized by degeneration of the large sensory neurons and spinocerebellar tracts, cardiomyopathy and increased incidence in diabetes. FRDA is caused by severely reduced levels of frataxin, a mitochondrial protein of unknown function. Yeast knockout models as well as histological and biochemical data from heart biopsies or autopsies of FRDA patients have shown that frataxin defects cause a specific iron-sulfur protein deficiency and intramitochondrial iron accumulation. We have recently shown that complete absence of frataxin in the mouse leads to early embryonic lethality, demonstrating an important role for frataxin during mouse development. Through a conditional gene-targeting approach, we have generated in parallel a striated muscle frataxin-deficient line and a neuron/cardiac muscle frataxin-deficient line, which together reproduce important progressive pathophysiological and biochemical features of the human disease: cardiac hypertrophy without skeletal muscle involvement, large sensory neuron dysfunction without alteration of the small sensory and motor neurons, and deficient activities of complexes I-III of the respiratory chain and of the aconitases. Our models demonstrate time-dependent intramitochondrial iron accumulation in a frataxin-deficient mammal, which occurs after onset of the pathology and after inactivation of the Fe-S-dependent enzymes. These mutant mice represent the first mammalian models to evaluate treatment strategies for the human disease.

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Crossref · 10.1038/84818

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Authors
Puccio, H., Simon, D., Cossée, M., Criqui-Filipe, P., Tiziano, F., Melki, J., Hindelang, C., Matyas, R., Rustin, P., & Koenig, M.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Inserm (FR)
Corresponding author
Koenig, Michel
Venue
Nature Genetics
Published
2001-02
Volume
27
Issue
2
Pages
181-186
ISSN
  • 1061-4036 (ISSN-L)
  • 1546-1718
OpenAlex
W1484379620
Cited by
738
References
25
Citations by year
2026: 19 · 2025: 18 · 2024: 28 · 2023: 17 · 2022: 24 · 2021: 20 · 2020: 30 · 2019: 21 · 2018: 24 · 2017: 20 · 2016: 25 · 2015: 24 · 2014: 33 · 2013: 43 · 2012: 34
FWCI
16.30
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Genetic Neurodegenerative Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Neuroscience › Neurology › Neurological diseases and metabolism
Keywords
Friedreich's ataxia, frataxin, mouse model, cardiomyopathy, cardiac hypertrophy, sensory neuron degeneration, iron-sulfur proteins, conditional gene targeting, embryonic lethality, mitochondrial iron
MeSH terms
Frataxin, Animals, Friedreich Ataxia, Iron-Sulfur Proteins, Mice, Mutant Strains, Mitochondria, Cardiomyopathies, Hereditary Sensory and Autonomic Neuropathies, Mutagenesis, Phosphotransferases (Alcohol Group Acceptor), Gene Targeting, Iron-Binding Proteins, Mice

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