Study summary · research use only
Beneficial effects of simultaneously targeting calorie intake and calorie efficiency in diet-induced obese mice
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
This mouse study examined combination therapy of semaglutide, an anti-diabetes and weight-loss drug, with the mitochondrial uncoupler BAM15 in diet-induced obese mice fed a high-fat western diet. Mice were stratified into six treatment groups: diet control, BAM15, low-dose semaglutide with or without BAM15, and high-dose semaglutide with or without BAM15. The abstract reports that combining BAM15 with either semaglutide dose decreased body fat and liver triglycerides, an effect not achieved by either drug alone, while high-dose semaglutide with BAM15 had the greatest effect on glucose homeostasis measured in the study. The authors describe this combination as improving weight loss without loss of lean mass and improving glucose control by targeting both energy intake and energy efficiency, potentially reducing the need for semaglutide dose escalation.
Abstract
Semaglutide is an anti-diabetes and weight loss drug that decreases food intake, slows gastric emptying, and increases insulin secretion. Patients begin treatment with low-dose semaglutide and increase dosage over time as efficacy plateaus. With increasing dosage, there is also greater incidence of gastrointestinal side effects. One reason for the plateau in semaglutide efficacy despite continued low food intake is due to compensatory actions whereby the body becomes more metabolically efficient to defend against further weight loss. Mitochondrial uncoupler drugs decrease metabolic efficiency, therefore we sought to investigate the combination therapy of semaglutide with the mitochondrial uncoupler BAM15 in diet-induced obese mice. Mice were fed high-fat western diet (WD) and stratified into six treatment groups including WD control, BAM15, low-dose semaglutide without or with BAM15, and high-dose semaglutide without or with BAM15. Combining BAM15 with either semaglutide dose decreased body fat and liver triglycerides, which was not achieved by any monotherapy, while high-dose semaglutide with BAM15 had the greatest effect on glucose homeostasis. This study demonstrates a novel approach to improve weight loss without loss of lean mass and improve glucose control by simultaneously targeting energy intake and energy efficiency. Such a combination may decrease the need for semaglutide dose escalation and hence minimize potential gastrointestinal side effects.
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