Specific point mutations may not accumulate with aging in the mouse mitochondrial DNA control region

Xiufeng Song, Jian Hong Deng, Changsheng J. Liu, Yidong Bai

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Increasing evidence suggests that mitochondrial function declines during aging in various tissues and in a wide range of organisms. This correlates with an age-dependent large accumulation of specific point mutations in the mtDNA control region that was reported recently in human fibroblast and skeletal muscle. However, evaluations of aging-related mtDNA mutations in other model animal systems. In this study, we analyzed mtDNA control regions of brain, skeletal muscle, heart, and other tissues from aged mice, in search of specific point mutations. A 948-bp fragment covering the entire mtDNA control region from various tissues of mice at the age of 25-26 months was sequenced. The sequence analysis was accomplished with a newly developed program Mutation Quantifier, which was able to accurately detect mutations with frequencies as low as 3%. Probably due to the relative shorter life-span, unlike what has been reported in human mtDNA, our results indicated there might be no significant accumulation of specific mutations in mouse mtDNA control region during aging.

Original languageEnglish (US)
Pages (from-to)193-199
Number of pages7
JournalGene
Volume350
Issue number2
DOIs
StatePublished - May 9 2005

Keywords

  • Aging
  • Control region
  • Mitochondrial DNA
  • Mouse
  • Mutation

ASJC Scopus subject areas

  • Genetics

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