REAL

Semaglutide lowers body weight in rodents via distributed neural pathways

Gabery, Sanaz and Salinas, Casper G. and Paulsen, Sarah J. and Ahnfelt-Rønne, Jonas and Alanentalo, Tomas and Baquero, Arian F. and Farkas, Erzsébet and Fekete, Csaba and Szilvásy-Szabó, Anett (2020) Semaglutide lowers body weight in rodents via distributed neural pathways. JCI INSIGHT, 5 (6). pp. 1-18. ISSN 2379-3708

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Abstract

Semaglutide, a glucagon-like peptide 1 (GLP-1) analog, induces weight loss, lowers glucose levels, and reduces cardiovascular risk in patients with diabetes. Mechanistic preclinical studies suggest weight loss is mediated through GLP-1 receptors (GLP-1Rs) in the brain. The findings presented here show that semaglutide modulated food preference, reduced food intake, and caused weight loss without decreasing energy expenditure. Semaglutide directly accessed the brainstem, septal nucleus, and hypothalamus but did not cross the blood-brain barrier; it interacted with the brain through the circumventricular organs and several select sites adjacent to the ventricles. Semaglutide induced central c-Fos activation in 10 brain areas, including hindbrain areas directly targeted by semaglutide, and secondary areas without direct GLP-1R interaction, such as the lateral parabrachial nucleus. Automated analysis of semaglutide access, c-Fos activity, GLP-1R distribution, and brain connectivity revealed that activation may involve meal termination controlled by neurons in the lateral parabrachial nucleus. Transcriptomic analysis of microdissected brain areas from semaglutide-treated rats showed upregulation of prolactin-releasing hormone and tyrosine hydroxylase in the area postrema. We suggest semaglutide lowers body weight by direct interaction with diverse GLP-1R populations and by directly and indirectly affecting the activity of neural pathways involved in food intake, reward, and energy expenditure.

Item Type: Article
Additional Information: Kilencedik szerző: Stiftné Szilvásy-Szabó Anett
Subjects: R Medicine / orvostudomány > R1 Medicine (General) / orvostudomány általában > R850-854 Experimental medicine / kisérleti orvostudomány
R Medicine / orvostudomány > RC Internal medicine / belgyógyászat > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry / idegkórtan, neurológia, pszichiátria
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 17 Mar 2021 14:12
Last Modified: 17 Mar 2021 14:12
URI: http://real.mtak.hu/id/eprint/122506

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