The Dog Aging Project has revealed that dogs and humans may share similar biological patterns associated with lifespan, according to a study published in The Journals of Gerontology. Researchers analyzed metabolites—small chemicals produced during normal bodily processes—and found that specific combinations of these metabolites were linked to earlier or later death in dogs, mirroring patterns previously identified in humans. Dr. Kate Creevy, chief veterinary officer for the Dog Aging Project, noted that the molecules associated with risk or protection against premature death are remarkably similar between the two species, suggesting shared features of aging biology.
The study utilized blood samples from dogs enrolled in the Dog Aging Project, a community science initiative that tracks dogs throughout their lives with owner-provided surveys and biological samples. By focusing on mortality as a clear endpoint, researchers could identify metabolic patterns associated with lifespan, examining thousands of metabolites collectively to discern broader patterns rather than individual molecules. These patterns, or “fingerprints,” may indicate underlying biological processes contributing to aging. The researchers then compared these canine metabolic patterns with findings from five large human mortality studies, discovering broad similarities that reinforce the notion that dogs and humans share key aspects of the biological mechanisms underlying aging. This shared biology could facilitate cross-species research, leveraging human findings to enhance canine health and using dogs as models to study aging across a lifespan.