Rare aging disorder links 'biological clock' to disease
Scientists have discovered a rare genetic condition that causes people to age at a much faster rate, offering fresh insights into the aging process. The study shows for the first time how a "biological clock" present in every cell of the body could contribute to age-related diseases.
edited by Sadie Harley , reviewed by Robert Egan
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Experts say the findings could support the design of future medicines to counter diseases linked to older age, as life expectancies continue to rise across the globe.
The study is published in the journal Nature Genetics .
Marks on DNA, known as DNA methylation , accumulate over time and can be used to accurately measure a person's age. This DNA methylation clock "ticks" at different rates in mammals according to lifespan, going faster in animals with a shorter life expectancy.