miR-155 deletion modulates lipopolysaccharide-induced sleep in female mice

Surbhi, . , Borniger, J. C., Russart, K. L. G., Zhang, N., Magalang, U. J., Nelson, R. J. (February 2019) miR-155 deletion modulates lipopolysaccharide-induced sleep in female mice. Chronobiol Int, 36 (2). pp. 188-202. ISSN 1525-6073 (Electronic)0742-0528 (Linking)

URL: https://www.ncbi.nlm.nih.gov/pubmed/30299169
DOI: 10.1080/07420528.2018.1525617


Immune signaling is known to regulate sleep. miR-155 is a microRNA that regulates immune responses. We hypothesized that miR-155 would alter sleep regulation. Thus, we investigated the potential effects of miR-155 deletion on sleep-wake behavior in adult female homozygous miR-155 knockout (miR-155(KO)) mice and littermate controls (WT). Mice were implanted with biotelemetry units and EEG/EMG biopotentials were recorded continuously for three baseline days. miR-155(KO) mice had decreased bouts of NREM and REM sleep compared with WT mice, but no differences were observed in the length of sleep bouts or total time spent in sleep-wake states. Locomotor activity and subcutaneous temperature did not differ between WT and miR-155(KO) mice. Following baseline recordings, mice were sleep-deprived during the first six hours of the rest phase (light phase; ZT 0-6) followed by an 18 h recovery period. There were no differences between groups in sleep rebound (% sleep and NREM delta power) after sleep deprivation. Following recovery from sleep deprivation, mice were challenged with a somnogen (viz., lipopolysaccharide (LPS)) one hour prior to the initiation of the dark (active) phase. Biopotentials were continuously recorded for the following 24 h, and miR-155(KO) mice displayed increased wakefulness and decreased NREM sleep during the dark phase following LPS injection. Additionally, miR-155(KO) mice had reduced EEG slow-wave responses (0.5-4 Hz) compared to WT mice. Together, our findings indicate that miR-155 deletion attenuates the somnogenic and EEG delta-enhancing effects of LPS. Abbreviations: ANOVA: analysis of variance; EEG: electroencephalogram; EMG: electromyogram; h: hour; IL-1: interleukin-1; IL-6: interleukin-6; IP: intra-peritoneal; LPS: lipopolysaccharide; miR/miRNA: microRNA; miR-155(KO): miR-155 knockout; NREM: non-rapid eye movement; REM: rapid eye movement; TNF: tumor necrosis factor; SWS: slow-wave sleep; WT: wild-type.

Item Type: Paper
Subjects: organism description > animal behavior > REM sleep
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > insertion/deletion
organism description > animal > mammal > rodent > mouse
CSHL Authors:
Communities: CSHL labs > Borniger lab
Depositing User: Adrian Gomez
Date: February 2019
Date Deposited: 06 Jan 2020 15:02
Last Modified: 06 Jan 2020 15:02
Related URLs:
URI: https://repository.cshl.edu/id/eprint/38856

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