The thalamic mGluR1-PLCβ4 pathway is critical in sleep architecture

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Title
The thalamic mGluR1-PLCβ4 pathway is critical in sleep architecture
Author(s)
JooHyeon Hong; Jungryun Lee; Kiyeong Song; Go Eun Ha; Yong Ryoul Yang; Ji Su Ma; Masahiro Yamamoto; Hee-Sup Shin; Pann-Ghill Suh; Eunji Cheong
Publication Date
2016-12
Journal
MOLECULAR BRAIN, v.9, no., pp.100 -
Publisher
BIOMED CENTRAL LTD
Abstract
The transition from wakefulness to a nonrapid eye movement (NREM) sleep state at the onset of sleep involves a transition from low-voltage, high-frequency irregular electroencephalography (EEG) waveforms to large-amplitude, low-frequency EEG waveforms accompanying synchronized oscillatory activity in the thalamocortical circuit. The thalamocortical circuit consists of reciprocal connections between the thalamus and cortex. The cortex sends strong excitatory feedback to the thalamus, however the function of which is unclear. In this study, we investigated the role of the thalamic metabotropic glutamate receptor 1 (mGluR1)-phospholipase C β4 (PLCβ4) pathway in sleep control in PLCβ4-deficient (PLCβ4-/-) mice. The thalamic mGluR1-PLCβ4 pathway contains synapses that receive corticothalamic inputs. In PLCβ4-/- mice, the transition from wakefulness to the NREM sleep state was stimulated, and the NREM sleep state was stabilized, which resulted in increased NREM sleep. The power density of delta (δ) waves increased in parallel with the increased NREM sleep. These sleep phenotypes in PLCβ4-/- mice were consistent in TC-restricted PLCβ4 knockdown mice. Moreover, in vitro intrathalamic oscillations were greatly enhanced in the PLCβ4-/- slices. The results of our study showed that thalamic mGluR1-PLCβ4 pathway was critical in controlling sleep architecture. © 2016 The Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/3221
ISSN
1756-6606
Appears in Collections:
Center for Cognition and Sociality(인지 및 사회성 연구단) > Journal Papers (저널논문)
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