Cited by 22Sleep and Wakefulness ResearchNeuroscience of respiration and sleepSleep and related disorders

Altered sleep architecture, rapid eye movement sleep, and neural oscillation in a mouse model of human chromosome 16p11.2 microdeletion

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Lu, Hung-Chi, Pollack, Harvey, Lefante, John J, Mills, Alea A, Tian, Di·2019·Sleep

Abstract

Sleep abnormalities are common among children with neurodevelopmental disorders. The human chr16p11.2 microdeletion is associated with a range of neurological and neurobehavioral abnormalities. Previous studies of a mouse model of human chr16p11.2 microdeletion (chr16p11.2df/+) have demonstrated pathophysiological changes at the synapses in the hippocampus and striatum; however, the impact of this genetic abnormality on system level brain functions, such as sleep and neural oscillation, has not been adequately investigated. Here, we show that chr16p11.2df/+ mice have altered sleep architecture, with increased wake time and reduced time in rapid eye movement (REM) and non-REM (NREM) sleep. Importantly, several measurements of REM sleep are significantly changed in deletion mice. The REM bout number and the bout number ratio of REM to NREM are decreased in mutant mice, suggesting a deficit in REM-NREM transition. The average REM bout duration is shorter in mutant mice, indicating a defect in REM maintenance. In addition, whole-cell patch clamp recording of the ventrolateral periaqueductal gray (vlPAG)-projecting gamma-aminobutyric acid (GABA)ergic neurons in the lateral paragigantocellular nucleus of ventral medulla of mutant mice reveal that these neurons, which are important for NREM–REM transition and REM maintenance, have hyperpolarized resting membrane potential and increased membrane resistance. These changes in intrinsic membrane properties suggest that these projection-specific neurons of mutant mice are less excitable, and thereby may play a role in deficient NREM–REM transition and REM maintenance. Furthermore, mutant mice exhibit changes in neural oscillation involving multiple frequency classes in several vigilance states. The most significant alterations occur in the theta frequency during wake and REM sleep.

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  • Sleep abnormalities and anxiety have been reported in 16p11.2+/− mice (Mills).

    “Sleep abnormalities [69, 70] and anxiety [66] have been reported in 16p11.2+/− mice (Mills).”
  • GABAergic neurons in the ventral medulla of 16p11.2+/− mice display hyperpolarized resting membrane potential and increased membrane resistance.

    “Additionally, GABAergic neurons in the ventral medulla display hyperpolarized resting membrane potential and increased membrane resistance [69].”

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Authors
Lu, H.-C., Pollack, H., Lefante, J. J., Mills, A. A., & Tian, D.
Affiliations
  • University of Southern California (US)
  • Tulane University (US)
  • Cold Spring Harbor Laboratory (US)
Corresponding author
Tian, Di
Venue
Sleep
Published
2018-12-12
Volume
42
Issue
3
ISSN
  • 0161-8105 (ISSN-L)
  • 1550-9109
OpenAlex
W2904148038
Cited by
22
References
96
Citations by year
2025: 3 · 2024: 4 · 2023: 4 · 2022: 4 · 2021: 4 · 2020: 2 · 2019: 1
FWCI
1.04
Type
journal article
Language
en
Open access
Locations
  • SLEEP (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (submittedVersion)
Funders
  • The Saban Research Institute of CHLA (8030-RRI007513)
  • Simons Foundation Autism Research Initiative
  • NIH
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Neuroscience of respiration and sleep
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
sleep architecture, REM sleep, NREM sleep, neural oscillations, theta oscillations, ventrolateral periaqueductal gray, GABAergic neurons, membrane hyperpolarization, membrane resistance, neurodevelopmental disorders, sleep abnormalities
MeSH terms
Animals, Autistic Disorder, Chromosome Deletion, Chromosomes, Human, Pair 16, Disease Models, Animal, Electroencephalography, Humans, Male, Medulla Oblongata, Membrane Potentials, Intellectual Disability, Mice, Inbred C57BL, Mice, Transgenic, Sleep, REM, Polysomnography, Chromosome Disorders, Mice, GABAergic Neurons

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