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Significance Obesity is a major public health problem affecting physical and emotional well-being. Although lifestyle-based programs can help with weight loss, avoiding weight regain is nearly impossible because of persistent hormonal adaptations. Here, in mouse models, we explored a more effective strategy using viral gene transfer of butyrylcholinesterase (BChE) to control the appetite-mediating hormone acyl-ghrelin. We found that a single injection of BChE vector led to a lifetime high enzyme expression and lower circulating acyl-ghrelin. This same treatment suppressed postdieting hyperphagia, corrected metabolic lesions, and lowered weight regain. This outcome confirms the impact of the BChE-ghrelin axis on body weight and indicates that BChE gene transfer could be a successful strategy for long-term control of obesity and the “metabolic syndrome.”

Butyrylcholinesterase gene transfer in obese mice prevents postdieting body weight rebound by suppressing ghrelin signaling