恒常的な光は生物学的リズムを乱し,睡眠の質を悪化させるが,メスラットの血圧を上昇させない
Lubos Molcan1, Hana Mauer Sutovska2, Michal Zeman2
1Department of Animal Physiology and Ethology, Faculty of Natural Sciences, Comenius University in Bratislava, Bratislava, Slovakia. lubos.molcan@uniba.sk.
まとめ
恒常的な光 (LL) は,メスラットの生物学的リズムを乱し,血圧 (BP) と心拍数 (HR) を低下させ,睡眠パターンと心血管の変動を大幅に変化させます.
科学分野:
- クロノバイオロジーはクロノバイオロジーを用います.
- 生理学 生理学とは
- 心血管研究 循環器科の研究
背景:
- 恒常的な光 (LL) 曝露は,生物学的リズムを乱し,昼間と超昼間パターンを影響することが知られている.
- LLの心臓血管への影響に関する以前の研究は,主に雄性歯類と間接的なBP測定を対象とした.
- 夜行性の動物は,通常,LL.の下では抑制された活動と低血圧 (BP) を表します.
研究 の 目的:
- 女性ラットの心臓血管のパラメータと睡眠に対するLLの影響を包括的に分析する.
- 心血管機能と活動における昼間および超昼間変動に対するLLの影響を調査する.
- 睡眠アーキテクチャに対するLLの影響と,心血管の変化との関連を評価する.
主な方法:
- 心拍数 (HR),高血圧,および雌ネズミの運動運動の継続的なテレメトリモニタリング.
- 4週間の恒常的な照明 (LL) 状態への曝露.
- 超音波リズム評価のためのスペクトル分析と,バロレフレクスの機能のための心拍数変動性 (HRV) 分析.
主要な成果:
- LLは徐々に基礎シストリックBPとHRを低下させ,昼夜リズムの強さを弱めた.
- HRと運動運動活動の超日リズムの大幅な障害が観察されました.
- 睡眠分析は,睡眠-覚醒状態の変化,非レム睡眠の減少,断片化の増加,および昼夜組織の喪失を示した.
結論:
- LLは,以前のいくつかの研究に基づく期待に反して,メスラットの血圧を低下させる.
- LLは,心臓血管の昼間および超昼間変動と睡眠構造を顕著に混乱させます.
- LL誘発のクロノディストラップションは,夜行性歯類に適応不能な生理的負荷を課し,睡眠と心血管の調節の両方に影響を及ぼします.
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