Haplotype of the astrocytic water channel AQP4 is associated with slow wave energy regulation in human NREM sleep

Sara Marie Ulv Larsen, Hans-Peter Landolt, Wolfgang Berger, Maiken Nedergaard, Gitte Moos Knudsen, Sebastian Camillo Holst

40 Citationer (Scopus)

Abstract

Cerebrospinal fluid (CSF) flow through the brain parenchyma is facilitated by the astrocytic water channel aquaporin 4 (AQP4). Homeostatically regulated electroencephalographic (EEG) slow waves are a hallmark of deep non-rapid eye movement (NREM) sleep and have been implicated in the regulation of parenchymal CSF flow and brain clearance. The human AQP4 gene harbors several single nucleotide polymorphisms (SNPs) associated with AQP4 expression, brain-water homeostasis, and neurodegenerative diseases. To date, their role in sleep-wake regulation is unknown. To investigate whether functional variants in AQP4 modulate human sleep, nocturnal EEG recordings and cognitive performance were investigated in 123 healthy participants genotyped for a common eight-SNP AQP4-haplotype. We show that this AQP4-haplotype is associated with distinct modulations of NREM slow wave energy, strongest in early sleep and mirrored by changes in sleepiness and reaction times during extended wakefulness. The study provides the first human evidence for a link between AQP4, deep NREM sleep, and cognitive consequences of prolonged wakefulness.

OriginalsprogEngelsk
Artikelnummere3000623
TidsskriftP L o S Biology
Vol/bind18
Udgave nummer5
Sider (fra-til)e3000623
ISSN1544-9173
DOI
StatusUdgivet - maj 2020

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