Abstract：
:Nesfatin-1, an 82-amino acid peptide encoded by the secreted precursor nucleobinin-2 (NUCB2), exerts potent anorexigenic action independently of leptin signaling. This propensity has propelled this peptide and its analogues as potential anti-obesity drug candidates. However, a more extensive comprehension of its biological actions is needed prior to envisaging its potential use in the treatment of metabolic diseases. Swallowing is an essential motor component of ingestive behavior, which induces the propulsion of the alimentary bolus from the mouth to the esophagus. The dorsal swallowing group (DSG) which constitutes a part of the central pattern generator of swallowing (SwCPG) is located within the solitary tract nucleus (STN), a region reported to contain nesfatin-1/NUCB2 expressing neurons. In this context, we investigate here the possible effects of nesfatin-1 on swallowing discharge. Nesfatin-1 dose-dependently inhibited swallowing reflex and activated neurons located in the DSG region. In addition, we provide evidences that strongly suggest that this nesfatin-1 inhibitory effect involved an oxytocinergic relay. Indeed, oxytocin (OT) injection at the brainstem level inhibited swallowing reflex and OT receptor antagonist prevented nesfatin-1 inhibitory action. Altogether, these data constitute the first demonstration that nesfatin-1 modulates swallowing reflex by acting at the brainstem level via an oxytocinergic relay.
journal_name
Brain Resjournal_title
Brain researchauthors
Guillebaud F,Roussel G,Félix B,Troadec JD,Dallaporta M,Abysique Adoi
10.1016/j.brainres.2019.01.032subject
Has Abstractpub_date
2019-05-15 00:00:00pages
173-182eissn
0006-8993issn
1872-6240pii
S0006-8993(19)30055-1journal_volume
1711pub_type
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