A study of mitochondrial DNA mutations in peripheral lymphocytes in an aging cohort.
Somatic mutation in the mitochondrial genome occurs much more rapidly than in the nuclear genome and is a feature, possibly contributory, of the aging of cells and tissues. Identifying mitochondrial sequence changes in blood DNA of elderly subjects may provide a maker for the epigenetic changes of mitochondrial DNA known to occur in tissues with lower cellular turnover, and would also have implications for immunosenescence. No large-scale epidemiological studies have been reported previously....Expand abstract
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