Cited by 181Metabolism and Genetic DisordersMitochondrial Function and PathologyGlycogen Storage Diseases and Myoclonus

Lack of mitochondrial trifunctional protein in mice causes neonatal hypoglycemia and sudden death

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Ibdah, Jamal A., Paul, Hyacinth, Zhao, Yiwen, Binford, Scott, Salleng, Ken, Cline, Mark, Matern, Dietrich, Bennett, Michael J. +2 more·2001·Journal of Clinical Investigation

Abstract

Mitochondrial trifunctional protein (MTP) is a hetero-octamer of four alpha and four beta subunits that catalyzes the final three steps of mitochondrial long chain fatty acid beta-oxidation. Human MTP deficiency causes Reye-like syndrome, cardiomyopathy, or sudden unexpected death. We used gene targeting to generate an MTP alpha subunit null allele and to produce mice that lack MTP alpha and beta subunits. The Mtpa(-/-) fetuses accumulate long chain fatty acid metabolites and have low birth weight compared with the Mtpa(+/-) and Mtpa(+/+) littermates. Mtpa(-/-) mice suffer neonatal hypoglycemia and sudden death 6-36 hours after birth. Analysis of the histopathological changes in the Mtpa(-/-) pups revealed rapid development of hepatic steatosis after birth and, later, significant necrosis and acute degeneration of the cardiac and diaphragmatic myocytes. This mouse model documents that intact mitochondrial long chain fatty acid oxidation is essential for fetal development and for survival after birth. Deficiency of MTP causes fetal growth retardation, neonatal hypoglycemia, and sudden death.

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Authors
Ibdah, J. A., Paul, H., Zhao, Y., Binford, S., Salleng, K., Cline, M., Matern, D., Bennett, M. J., Rinaldo, P., & Strauss, A. W.
Affiliations
  • Wake Forest University Health Sciences (US)
  • Wake Forest University (US)
  • Mayo Clinic (US)
  • The University of Texas Southwestern Medical Center (US)
  • Vanderbilt University (US)
Corresponding author
Ibdah, Jamal A.
Venue
Journal of Clinical Investigation
Published
2001-06-01
Volume
107
Issue
11
Pages
1403-1409
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2144783460
Cited by
181
References
27
Citations by year
2026: 2 · 2025: 4 · 2024: 7 · 2023: 4 · 2022: 5 · 2021: 5 · 2020: 11 · 2019: 7 · 2018: 5 · 2017: 10 · 2016: 9 · 2015: 12 · 2014: 5 · 2013: 9 · 2012: 6
FWCI
4.46
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (AM 20407, 5k08dk002574-04)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-02574)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Metabolism and Genetic Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Rheumatology › Glycogen Storage Diseases and Myoclonus
Keywords
mitochondrial trifunctional protein, long-chain fatty acid beta-oxidation, neonatal hypoglycemia, sudden unexpected death, hepatic steatosis, myocardial necrosis, fetal growth restriction, Reye-like syndrome, mitochondrial fatty acid oxidation
MeSH terms
Animals, Animals, Newborn, Blood Chemical Analysis, Crosses, Genetic, Death, Sudden, Diaphragm, Disease Models, Animal, Female, Embryonic and Fetal Development, Fetal Growth Retardation, Humans, Hypoglycemia, Liver, Male, Multienzyme Complexes, Myocardium, Immunoblotting, Mice, Knockout, Gene Targeting, Mice, Mitochondrial Trifunctional Protein

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