Fading control over 'jumping genes' may explain why big dogs age faster
Researchers at Arizona State University have identified a molecular link between body size and aging in dogs. The study suggests that larger dogs age faster due to how their DNA changes over time, providing a potential model for understanding human aging.
Why it matters
Understanding the biological mechanisms of aging in dogs could lead to breakthroughs in human health and longevity research.
edited by Gaby Clark , reviewed by Robert Egan
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Add to Preferred Sources Big dogs tend to age faster than small dogs. Now, we know why. A new study led by researchers at Arizona State University offers the first compelling molecular explanation of why large dogs live shorter lives: the answer may lie in how hallmarks of aging reshape dog DNA. Credit: Charlie Leight, Arizona State University Across mammals, larger species typically have longer lifespans, ranging from only a couple of years for mice to almost 200 years for some whales.
However, when we look within species, we often see the opposite—smaller individuals outliving larger individuals. And we see this in dogs.
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