GoKawiilDog Aging Project study links 'jumping genes' to faster aging in large breeds
Arizona State University researchers analyzed DNA methylation data from 864 dogs collected through the Dog Aging Project and published their findings in Science. They found that aging correlates with declining epigenetic regulation of transposable DNA sequences called 'jumping genes,' particularly a class known as LINE1s, with giant breeds losing roughly 35 percent of this regulatory control.
GoKawiil's interpretation of the reporting above, not reported fact.
The findings could help explain the long-standing puzzle of why larger dog breeds die younger than smaller ones, unlike the usual pattern across mammal species where bigger animals live longer. Because dogs share human environments and show wide variation in size and lifespan within one species, they may serve as a useful model for researchers studying the broader biology of aging and age-related disease.
- Researchers used DNA methylation data from 864 dogs in the Dog Aging Project.
- A class of transposable elements called LINE1 'jumping genes' was linked to faster aging in large breeds.
- Giant breeds showed about 35 percent less epigenetic regulation of these elements than smaller dogs.
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Published there as: “Why large dogs age faster than small ones, and other October research highlights”
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