Scientists Identify a Single Protein That May Control Cravings For Fatty Foods

Researchers at Osaka Metropolitan University have discovered that a single protein may play a significant role in determining how much fatty food people and animals consume. The protein, called optic atrophy-1 (OPA1), helps regulate the function of mitochondria, which are often described as the cell’s energy powerhouses. Scientists suspect that when this protein is impaired or absent, it disrupts the body’s ability to regulate appetite and food preferences.

In experiments with genetically modified mice lacking OPA1 in appetite-controlling neurons, researchers observed a dramatic shift in dietary behavior. These mice showed substantially greater preference for fatty foods compared to control subjects and gained weight at accelerated rates, with female mice demonstrating more pronounced effects than males. Over several weeks, the affected animals developed obesity, suggesting that OPA1 may become increasingly important as organisms age.

The neurons in question are located in the hypothalamus, a brain region critical for managing metabolism, hunger, and energy expenditure. By studying how OPA1 influences these appetite-regulating neurons, scientists have gained valuable insight into the biological mechanisms underlying obesity. Interestingly, when researchers administered an anti-obesity drug, it worked effectively in male mice regardless of OPA1 status, but proved less effective in females lacking the protein.

While these findings are currently limited to mouse models, they suggest that OPA1 dysfunction could partially explain unhealthy eating patterns in humans. Researchers believe these discoveries could eventually lead to personalized treatment approaches for obesity, particularly those accounting for biological sex differences in how individuals respond to interventions.

Originally reported by Sciencealert →