Canine Genes Shed Light on⁤ Human ‍Obesity Risk

Updated June 10, 2025

A new study reveals that genes associated with obesity in Labrador retrievers also play a role in human weight gain. Researchers identified⁣ several genes contributing to canine obesity, offering insights into the complex genetic factors influencing body weight in both species. ⁣The research highlights the importance of understanding genetic predispositions to obesity and the potential for targeted interventions.

The gene with the strongest link to obesity in Labradors is ⁢DENND1B. This same gene is present in humans and also ⁣associated with weight issues. According to the study, DENND1B⁤ directly impacts the leptin melanocortin pathway,⁤ a crucial brain⁢ pathway for regulating energy balance.

Researchers at the university of Cambridge also mapped four additional genes linked to canine obesity directly onto corresponding human genes. While these genes have a smaller effect than DENND1B, they further underscore the shared genetic basis of obesity in dogs and humans.

Alyce McClellan, with the University of Cambridge’s department of Physiology, Growth and ⁣Neuroscience, noted that these⁣ genes aren’t immediate targets for weight-loss ‍drugs. McClellan ⁤said they control ⁢other key biological processes that should‍ not be interfered with. She ‍added that the results emphasize the importance of basic brain pathways in controlling appetite and body weight.

Natalie Wallis, also with the university of Cambridge, said dogs with a high genetic risk of obesity showed more interest in food. Wallis added that they measured how⁣ much dogs pestered their owners for food and whether they were fussy eaters. She said⁢ dogs⁣ at high genetic risk ⁢of obesity showed signs of having higher appetite, as has also‍ been shown for people at high genetic ‍risk of obesity.

The study, published in the journal Science, also found‍ that owners who closely managed their dogs’ diets and exercise routines coudl prevent obesity, even in dogs with a high genetic risk. Though, this required significantly more effort.

Eleanor Raffan, a researcher at the University of Cambridge, said studying dogs showed that owners of slim dogs are not morally superior. Raffan added that the same is true of slim people. She said if you⁣ have a ‍high genetic risk of obesity, then when there’s lots of food available you’re prone to overeating and gaining weight unless you put a huge effort into not doing so.

Raffan said that by studying dogs, researchers could measure their desire for food separately from the⁢ control owners exerted over their dog’s diet and exercise.She ⁤added ⁢that in ‍human studies, it’s harder to study how genetically driven ⁤appetite requires greater willpower to remain slim, as both are affecting the one person.

Researchers suggest that owners can manage their dogs’ hunger by using puzzle feeders,scattering food in the garden,or choosing more nutrient-rich food‍ options. These strategies can help ⁤to slow down eating and increase satiety.

What’s next

Further research will explore the specific mechanisms by which ⁣these genes influence appetite and metabolism, potentially leading ⁣to new strategies for preventing and treating obesity in ⁤both humans and their canine companions. Understanding the genetic ⁤basis of⁢ obesity risk can⁢ empower individuals to make informed choices about diet and lifestyle.