Abstract
Mitochondrial DNA (mtDNA) is present in multiple copies in human cells. We evaluated cross-sectional associations of whole-blood mtDNA copy number (CN) with several cardiometabolic disease traits in 408,361 participants of multiple ancestries in TOPMed and UK Biobank. Age showed a threshold association with mtDNA CN: each additional 10 years of age was associated with a 0.03 SD higher level of mtDNA CN (p = 0.0014) among younger participants (younger than 65 years) versus a 0.14 SD lower level of mtDNA CN (p = 1.82 × 10−13) among older participants (65 years and older). At lower mtDNA CN levels, we found age-independent associations with increased odds of obesity (p = 5.6 × 10−238), hypertension (p = 2.8 × 10−50), diabetes (p = 3.6 × 10−7), and hyperlipidemia (p = 6.3 × 10−56). The observed decline in mtDNA CN after 65 years of age may be a key to understanding age-related diseases.
| Original language | English (US) |
|---|---|
| Article number | 100006 |
| Journal | Cell Genomics |
| Volume | 1 |
| Issue number | 1 |
| DOIs | |
| State | Published - Oct 13 2021 |
| Externally published | Yes |
Keywords
- aging
- cardiometabolic disease
- inflammation
- mitochondrial DNA copy number
- white blood cell counts
- whole-exom sequencing
- whole-genome sequencing
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology (miscellaneous)
- Genetics
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