A recent study published in Science has highlighted a gene linked to obesity that is common in both dogs and humans. Researchers found that this gene, referred to as DENND1B, affects the regulation of appetite and energy balance, making it significant for understanding weight gain across species.
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The study, led by Eleanor Raffan from the University of Cambridge, focused on British Labrador Retrievers, a breed known for its tendency to gain weight. Raffan noted that Labradors are especially motivated by food, making them an ideal subject for research on obesity.
The research involved analyzing saliva samples from 241 dogs to conduct a genome-wide association study that identifies genetic contributions to specific traits. The findings revealed that the top five obesity-related genes in dogs were also present in humans.
Raffan explained that dogs with a high genetic risk for obesity were likely to become overweight if their owners were not diligent about their diet and exercise. In contrast, low-risk dogs maintained a healthy weight regardless of their owners' management.
The study emphasizes the importance of understanding the biological factors that influence obesity. Raffan pointed out that this knowledge is crucial for developing effective anti-obesity treatments.
Furthermore, the researchers were able to measure individual dogs' genetic obesity risks, providing insight into how much effort owners need to invest in maintaining their pets' healthy weight. Raffan remarked that it is essential to view owners of overweight dogs with empathy, as the weight gain often stems from the dogs' persistent food-seeking behavior rather than the owners' lack of care.