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Rapid-eye movement (REM) sleep behavior disorder (RBD), enactment of dreams during REM sleep, is an early clinical symptom of alpha-synucleinopathies and defines a more severe subtype. The genetic background of RBD and its underlying mechanisms are not well understood. Here, we perform a genome-wide association study of RBD, identifying five RBD risk loci near SNCA, GBA, TMEM175, INPP5F, and SCARB2. Expression analyses highlight SNCA-AS1 and potentially SCARB2 differential expression in different brain regions in RBD, with SNCA-AS1 further supported by colocalization analyses. Polygenic risk score, pathway analysis, and genetic correlations provide further insights into RBD genetics, highlighting RBD as a unique alpha-synucleinopathy subpopulation that will allow future early intervention.
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http://dx.doi.org/10.1038/s41467-022-34732-5 | DOI Listing |
Neuroimage
September 2025
UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, INSERM, Sorbonne Université, Paris, France; Assistance Publique-Hôpitaux de Paris, Hôpital Pitié-Salpêtrière, Département R3S, Paris, France. Electronic address:
Background: Neural respiratory drive (NRD) is a clinically relevant biomarker in patients with chronic obstructive pulmonary disease (COPD). However, its analysis is challenging due to several technical considerations, including the need to obtain a stable recording over a short time period. However, a short recording duration may be inadequate to comprehensively record clinically relevant information, particularly during sleep, because NRD varies across sleep stages and over time.
View Article and Find Full Text PDFProbiotics Antimicrob Proteins
September 2025
Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Marília (UNIMAR), Marília, SP, 17525-902, Brazil.
The symbiosis between intestinal bacteria and the human body's physiological processes can modulate health. The intestinal microbiota is linked to the development of neurotrophic factors; therefore, it is increasingly related to the modulation of nervous system pathologies. Moreover, microbiota can interfere with inflammation and oxidative stress, which are closely linked to cardiovascular risk factors and several other inflammatory conditions, such as kidney and neurodegenerative diseases.
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September 2025
Department of Neurology, King's College Hospital, Golden Jubilee, Denmark Hill, London, SE5 9RS, UK.
The article summarizes neuroimaging studies carried out during the last 2 decades to investigate the mechanisms underlying sleep dysfunction in Parkinson's and other synucleinopathies. Rapid eye movement sleep behavior disorder and excessive daytime sleepiness are discussed, as they are the most frequently investigated.
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September 2025
Centre for Neurology, Academic Specialist Centre, Stockholm Health Services, Solnavägen 2, 11365 Stockholm, Sweden; Department of Clinical Neuroscience, Karolinska Institutet, 17177 Stockholm, Sweden; Department of Neurology, Karolinska University Hospital, Bioclinicum J5:20, Stockholm 17164, Swede
Parkinson's disease is a neurodegenerative disorder with an increasing prevalence worldwide. The development of disease-modifying therapies remains a critical priority; however, early intervention is limited by the paucity of robust biomarkers for the prodromal stage. Sleep disturbances-particularly isolated rapid eye movement sleep behavior disorder (iRBD)-are emerging as key clinical markers of prodromal synucleinopathy, offering opportunities for early detection and risk stratification.
View Article and Find Full Text PDFSleep Med
August 2025
Department of Neurology, West China Hospital, Sichuan University, Chengdu, Sichuan Province, 610041, PR China. Electronic address:
Background: Progressive supranuclear palsy (PSP) is a rapidly advancing tauopathy, and amongst rapid eye movement (REM) sleep behavior disorder (RBD) has been observed. Prior studies were limited by small samples and inconsistent results; meanwhile, research is lacking since the updated criteria for PSP. This cross-sectional study aimed to assess RBD in a sizable PSP cohort.
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