Hormonal
Neuronal GLP1 receptors (GLP1R) are necessary for the anorectic (appetite-suppressing) and weight-loss effects of the long-acting GLP1 agonist liraglutide, but are not required for its glucose-lowering effects.
For patients using GLP-1 agonists like liraglutide for weight loss, understanding that the drug works by acting on the brain is key. The weight loss is driven by central nervous system receptors, not just peripheral gut signals. This explains why the medication reduces appetite centrally. However, the blood sugar benefits occur through different pathways, likely directly on the pancreas, meaning glucose control can be achieved even if the appetite-suppressing effects are blunted.
These data indicate that neuronal GLP1Rs mediate body weight and anorectic effects of liraglutide, but are not required for glucose-lowering effects.
Why this rating
High-quality experimental design using specific genetic knockouts (CNS and vagal) to isolate receptor function, though results are from mice.
Source
Neuronal GLP1R mediates liraglutide’s anorectic but not glucose-lowering effect
Stephanie Sisley et al. · Journal of Clinical Investigation · 2014
DOI 10.1172/jci72434
Related findings · Hormonal
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