Cold exposure and/or fasting modulate the relationship between sleep and body temperature rhythms in mice

Nobuo Sato, Shuri Marui, Makoto Ozaki, Kei Nagashima

    研究成果: Article

    5 引用 (Scopus)

    抄録

    We assessed the relationship between core temperature (T<inf>c</inf>) and sleep rhythms in mice, and examined the effects of ambient temperature and fasting. T<inf>c</inf>, electroencephalograms (EEG), electromyograms (EMG), and spontaneous activity in male ICR mice (n=9) were measured by telemetry for 3days under a 12:12h dark-light cycle. Mice were fed or fasted at an ambient temperature (T<inf>a</inf>) of 27°C or 20°C for the final 30h of the experiment. The vigilance state was categorized into a wake state, rapid-eye movement (REM) sleep, and non-REM (NREM) sleep, and the total sleep time (TST) was assessed. Relationships between T<inf>c</inf> and TST, NREM periods, and REM sleep were estimated using Pearson's correlation coefficient. During cold exposure, T<inf>c</inf> decreased during the dark and light phases, and TST and the periods of NREM and REM sleep decreased during the dark phase. Throughout the fasting period, T<inf>c</inf> also decreased during the dark and light phases. Furthermore, the decrease in T<inf>c</inf> was augmented when fasting and cold were combined. TST and NREM sleep periods decreased in the light and dark phases, respectively, whereas REM sleep periods decreased in both phases. Negative linear correlations (r=-0.884 to -0.987) were observed between T<inf>c</inf> and TST, NREM sleep periods, and REM sleep periods, except for T<inf>c</inf> and REM sleep periods where fasting and cold conditions were combined. The correlations between sleep and T<inf>c</inf> rhythms were well maintained during cold exposure and fasting. However, when cold and fasting were combined, REM sleep and T<inf>c</inf> rhythms were desynchronized.

    元の言語English
    ページ(範囲)69-75
    ページ数7
    ジャーナルPhysiology and Behavior
    149
    DOI
    出版物ステータスPublished - 2015 10 1

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    Body Temperature
    Fasting
    Sleep
    REM Sleep
    Cold
    Temperature
    Mouse
    Rhythm
    Light
    Inbred ICR Mouse
    Telemetry
    Eye Movements
    Photoperiod
    Electromyography

    ASJC Scopus subject areas

    • Behavioral Neuroscience
    • Experimental and Cognitive Psychology
    • Philosophy

    これを引用

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    title = "Cold exposure and/or fasting modulate the relationship between sleep and body temperature rhythms in mice",
    abstract = "We assessed the relationship between core temperature (Tc) and sleep rhythms in mice, and examined the effects of ambient temperature and fasting. Tc, electroencephalograms (EEG), electromyograms (EMG), and spontaneous activity in male ICR mice (n=9) were measured by telemetry for 3days under a 12:12h dark-light cycle. Mice were fed or fasted at an ambient temperature (Ta) of 27°C or 20°C for the final 30h of the experiment. The vigilance state was categorized into a wake state, rapid-eye movement (REM) sleep, and non-REM (NREM) sleep, and the total sleep time (TST) was assessed. Relationships between Tc and TST, NREM periods, and REM sleep were estimated using Pearson's correlation coefficient. During cold exposure, Tc decreased during the dark and light phases, and TST and the periods of NREM and REM sleep decreased during the dark phase. Throughout the fasting period, Tc also decreased during the dark and light phases. Furthermore, the decrease in Tc was augmented when fasting and cold were combined. TST and NREM sleep periods decreased in the light and dark phases, respectively, whereas REM sleep periods decreased in both phases. Negative linear correlations (r=-0.884 to -0.987) were observed between Tc and TST, NREM sleep periods, and REM sleep periods, except for Tc and REM sleep periods where fasting and cold conditions were combined. The correlations between sleep and Tc rhythms were well maintained during cold exposure and fasting. However, when cold and fasting were combined, REM sleep and Tc rhythms were desynchronized.",
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    author = "Nobuo Sato and Shuri Marui and Makoto Ozaki and Kei Nagashima",
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    T1 - Cold exposure and/or fasting modulate the relationship between sleep and body temperature rhythms in mice

    AU - Sato, Nobuo

    AU - Marui, Shuri

    AU - Ozaki, Makoto

    AU - Nagashima, Kei

    PY - 2015/10/1

    Y1 - 2015/10/1

    N2 - We assessed the relationship between core temperature (Tc) and sleep rhythms in mice, and examined the effects of ambient temperature and fasting. Tc, electroencephalograms (EEG), electromyograms (EMG), and spontaneous activity in male ICR mice (n=9) were measured by telemetry for 3days under a 12:12h dark-light cycle. Mice were fed or fasted at an ambient temperature (Ta) of 27°C or 20°C for the final 30h of the experiment. The vigilance state was categorized into a wake state, rapid-eye movement (REM) sleep, and non-REM (NREM) sleep, and the total sleep time (TST) was assessed. Relationships between Tc and TST, NREM periods, and REM sleep were estimated using Pearson's correlation coefficient. During cold exposure, Tc decreased during the dark and light phases, and TST and the periods of NREM and REM sleep decreased during the dark phase. Throughout the fasting period, Tc also decreased during the dark and light phases. Furthermore, the decrease in Tc was augmented when fasting and cold were combined. TST and NREM sleep periods decreased in the light and dark phases, respectively, whereas REM sleep periods decreased in both phases. Negative linear correlations (r=-0.884 to -0.987) were observed between Tc and TST, NREM sleep periods, and REM sleep periods, except for Tc and REM sleep periods where fasting and cold conditions were combined. The correlations between sleep and Tc rhythms were well maintained during cold exposure and fasting. However, when cold and fasting were combined, REM sleep and Tc rhythms were desynchronized.

    AB - We assessed the relationship between core temperature (Tc) and sleep rhythms in mice, and examined the effects of ambient temperature and fasting. Tc, electroencephalograms (EEG), electromyograms (EMG), and spontaneous activity in male ICR mice (n=9) were measured by telemetry for 3days under a 12:12h dark-light cycle. Mice were fed or fasted at an ambient temperature (Ta) of 27°C or 20°C for the final 30h of the experiment. The vigilance state was categorized into a wake state, rapid-eye movement (REM) sleep, and non-REM (NREM) sleep, and the total sleep time (TST) was assessed. Relationships between Tc and TST, NREM periods, and REM sleep were estimated using Pearson's correlation coefficient. During cold exposure, Tc decreased during the dark and light phases, and TST and the periods of NREM and REM sleep decreased during the dark phase. Throughout the fasting period, Tc also decreased during the dark and light phases. Furthermore, the decrease in Tc was augmented when fasting and cold were combined. TST and NREM sleep periods decreased in the light and dark phases, respectively, whereas REM sleep periods decreased in both phases. Negative linear correlations (r=-0.884 to -0.987) were observed between Tc and TST, NREM sleep periods, and REM sleep periods, except for Tc and REM sleep periods where fasting and cold conditions were combined. The correlations between sleep and Tc rhythms were well maintained during cold exposure and fasting. However, when cold and fasting were combined, REM sleep and Tc rhythms were desynchronized.

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