Long-acting glucagon-like peptide-1 receptor agonists have direct access to and effects on pro-opiomelanocortin/cocaine- and amphetamine-stimulated transcript neurons in the mouse hypothalamus.

What the researchers found

Long-acting GLP-1 receptor agonists such as liraglutide directly access the arcuate nucleus in the hypothalamus of mice, activating pro-opiomelanocortin (POMC) neurons and increasing cocaine- and amphetamine-regulated transcript (CART) neuropeptide mRNA. This direct neuronal activation correlates with reduced hunger and increased satiety observed clinically.

Why it matters

Understanding that GLP-1 receptor agonists directly affect brain neurons controlling appetite provides insight into their weight loss effects, potentially guiding improved obesity treatments.

How the study worked

The study used fluorescently labeled liraglutide and other GLP-1 receptor agonists combined with single-plane illumination microscopy to track drug access to mouse brain regions. Molecular analyses measured changes in neuropeptide mRNA levels in specific hypothalamic neurons after drug administration.

What this study cannot tell us

The study was conducted in mice, so results may not fully translate to humans; the exact clinical relevance and long-term effects require further investigation.

Read the original research

Long-acting glucagon-like peptide-1 receptor agonists have direct access to and effects on pro-opiomelanocortin/cocaine- and amphetamine-stimulated transcript neurons in the mouse hypothalamus.

Journal of diabetes investigation, 7 Suppl 1(Suppl 1), 56-63

Citation

Knudsen, Lotte Bjerre; Secher, Anna; Hecksher-Sørensen, Jacob; Pyke, Charles. (2016). Long-acting glucagon-like peptide-1 receptor agonists have direct access to and effects on pro-opiomelanocortin/cocaine- and amphetamine-stimulated transcript neurons in the mouse hypothalamus.. Journal of diabetes investigation, 7 Suppl 1(Suppl 1), 56-63. https://doi.org/10.1111/jdi.12463