Cited by 306Mitochondrial Function and PathologyCancer, Hypoxia, and MetabolismHigh Altitude and Hypoxia

Hypoxemia Is Associated With Mitochondrial DNA Damage and Gene Induction: Implications for Cardiac Disease

Corral-Debrinski, Marisol·1991·JAMA

Abstract

Objective --Oxidative phosphorylation (OXPHOS) deficiency due to hypoxemia or other causes was hypothesized to increase oxygen radical generation, damage mitochondrial DNA (mtDNA), and reduce adenosine triphosphate synthesis, resulting in compensatory OXPHOS gene induction. Therefore, we investigated the levels of mtDNA damage and OXPHOS transcripts in normal and ischemic hearts, and then in other forms of heart disease.Design --DNA was extracted from the heart and the levels of the common 4977 base pair mtDNA deletion were quantitated as an index for mtDNA damage. Total RNA was extracted from hearts and analyzed for OXPHOS transcript levels.Results --In control hearts, the 4977 base pair mtDNA deletion appeared at age 40 years and reached a maximum deletion of 0.0035%. Much higher levels were found in ischemic hearts (0.02% to 0.85%), as well as in three of 10 cases with other types of heart disease (0.017% to 0.16%). The OXPHOS transcripts were increased in all diseased hearts.Conclusion --Ischemic hearts have increased mtDNA damage and OXPHOS gene expression, suggesting that mtDNA damage is associated with OXPHOS deficiency. Oxidative phosphorylation defects may also play a role in some other forms of cardiac disease.

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Crossref · 10.1001/jama.1991.03470130092035

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  • mtDNA mutations are associated with atherosclerosis, hypertension, type 2 diabetes, cardiovascular disease, and obesity.

    “Moreover, mtDNA mutations have been associated with the development of chronic human diseases, such as atherosclerosis, hypertension, T2DM, cardiovascular disease and obesity175–178.”

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Authors
Corral-Debrinski, M.
Venue
JAMA
Published
1991-10-02
Volume
266
Issue
13
Pages
1812
ISSN
  • 0002-9955 (ISSN-L)
  • 0098-7484
OpenAlex
W7214182327
Cited by
1
References
0
FWCI
0.00
Type
journal article
Language
en
Open access
closed
Locations
JAMA (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › High Altitude and Hypoxia
Keywords
hypoxemia, mitochondrial DNA damage, gene induction, oxidative stress

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