Quantification of mitochondrial DNA mutation load

Laura C. Greaves, Nina E. Beadle, Geoffrey A. Taylor, Daniel Commane, John C. Mathers, Konstantin Khrapko, Doug M. Turnbull

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)
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Abstract

Mitochondrial DNA (mtDNA) mutations are an important cause of genetic disease and have been proposed to play a role in the ageing process. Quantification of total mtDNA mutation load in ageing tissues is difficult as mutational events are rare in a background of wild-type molecules, and detection of individual mutated molecules is beyond the sensitivity of most sequencing based techniques. The methods currently most commonly used to document the incidence of mtDNA point mutations in ageing include post-PCR cloning, single-molecule PCR and the random mutation capture assay. The mtDNA mutation load obtained by these different techniques varies by orders of magnitude, but direct comparison of the three techniques on the same ageing human tissue has not been performed. We assess the procedures and practicalities involved in each of these three assays and discuss the results obtained by investigation of mutation loads in colonic mucosal biopsies from ten human subjects.

Original languageEnglish
Pages (from-to)566-72
Number of pages7
JournalAging Cell
Volume8
Issue number5
Early online date18 Jul 2009
DOIs
Publication statusPublished - 24 Sep 2009

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