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RNA Breakthrough Boosts Weight Loss
22 Sep
Summary
- Experimental RNA therapy preserves muscle mass during weight loss.
- Mice with combined therapy lost more fat and retained more muscle.
- Therapy converts fat-storing white fat to calorie-burning beige fat.
Researchers at Northwestern University have developed an experimental RNA therapy that may solve a significant drawback of current obesity treatments: muscle loss. This new approach targets thermogenesis, converting white fat (energy-storing) into beige fat (energy-burning) by silencing the ZFP423 gene. This mechanism increases energy expenditure rather than reducing appetite, potentially circumventing issues associated with appetite suppressants.
In studies involving mice, the therapy improved glucose tolerance and reduced body fat without muscle depletion. When combined with the GLP-1 medication semaglutide, the results were even more pronounced. Mice receiving both treatments lost more weight and body fat than those on semaglutide alone, with significantly less lean mass loss (5.5% vs. 10%).
While still in early stages and tested only in mice, this RNA therapy holds promise for long-term health benefits by preserving muscle. Such preservation could mitigate challenges in weight maintenance, including mobility issues, cardiometabolic risks, and insulin sensitivity. The team is now progressing to test related RNA therapies in human cells, emphasizing the potential for a new lean mass-preserving obesity treatment.
