Loss of Snord116 alters cortical neuronal activity in mice: a preclinical investigation of Prader–Willi syndrome

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Serval ID
serval:BIB_CF7BD3EA3DB9
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Loss of Snord116 alters cortical neuronal activity in mice: a preclinical investigation of Prader–Willi syndrome
Journal
Human Molecular Genetics
Author(s)
Marta Pace, Ilaria Colombi, Matteo Falappa, Andrea Freschi, Mojtaba Bandarabadi, Andrea Armirotti, Blanco María Encarnación, Antoine R Adamantidis, Roberto Amici, Matteo Cerri, Michela Chiappalone, Valter Tucci
Publication state
Published
Issued date
29/07/2020
Language
english
Abstract
Prader–Willi syndrome (PWS) is a neurodevelopmental disorder that is characterized by metabolic alteration and sleep abnormalities mostly related to rapid eye movement (REM) sleep disturbances. The disease is caused by genomic imprinting defects that are inherited through the paternal line. Among the genes located in the PWS region on chromosome 15 (15q11-q13), small nucleolar RNA 116 (Snord116) has been previously associated with intrusions of REM sleep into wakefulness in humans and mice. Here, we further explore sleep regulation of PWS by reporting a study with PWScrm+/p− mouse line, which carries a paternal deletion of Snord116. We focused our study on both macrostructural electrophysiological components of sleep, distributed among REMs and nonrapid eye movements. Of note, here, we study a novel electroencephalography (EEG) graphoelements of sleep for mouse studies, the well-known spindles. EEG biomarkers are often linked to the functional properties of cortical neurons and can be instrumental in translational studies. Thus, to better understand specific properties, we isolated and characterized the intrinsic activity of cortical neurons using in vitro microelectrode array. Our results confirm that the loss of Snord116 gene in mice influences specific properties of REM sleep, such as theta rhythms and, for the first time, the organization of REM episodes throughout sleep–wake cycles. Moreover, the analysis of sleep spindles present novel specific phenotype in PWS mice, indicating that a new catalog of sleep biomarkers can be informative in preclinical studies of PWS.
Create date
06/07/2021 14:28
Last modification date
07/07/2021 5:36
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