Age dependent 6KB deletion in human liver mitochondrial DNA

T. C. Yen, C. Y. Pang, R. H. Hsieh, C. H. Su, K. L. King, Y. H. Wei

研究成果: 雜誌貢獻文章同行評審

41 引文 斯高帕斯(Scopus)


Using PCR technique, restriction mapping and DNA sequencing, we analyzed liver mitochondrial DNA (mtDNA) of 2 stillborn babies and 62 Chinese subjects with non-liver disease from 27 to 86 years old. The results showed an age-dependent 6,063 bp deletion in the liver mtDNA of older subjects. We found a TAACAGAC sequence flanking the 5'-end breakpoint at 7,842 nucleotide position and an imperfect repeat sequence CAACATAC flanking the 3'-end breakpoint at 13,905 nucleotide position. The incidence of the deleted mtDNA was found to increase with age. The deleted mtDNA was not detected in the liver of the stillbirth or blood cells of all the subjects. This is the first account that an age-related 6,063 bp deletion occurs in the liver mtDNA of old humans. The occurrence of this and previously reported 4,977 bp deletions is consistent with our recent finding that liver mitochondrial respiratory functions decline with age and support the hypothesis that continuous accumulation of mtDNA mutations is an important contributor to ageing process in the human.

頁(從 - 到)457-468
期刊Biochemistry International
出版狀態已發佈 - 1992

ASJC Scopus subject areas

  • 生物化學


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