転写抑制体DEC2は,哺乳類の睡眠時間を調節する
Ying He1, Christopher R Jones, Nobuhiro Fujiki
1Department of Neurology, University of California at San Francisco, Mission Bay, 1550 Fourth Street, San Francisco, CA 94158, USA.
Science (New York, N.Y.)
|August 15, 2009
まとめ
研究者らは,ヒトの睡眠不足に関連した変異 (hDEC2-P385R) を特定した. この変異を持つトランスジェニックマウスは睡眠が低下し,睡眠ホメオスタシスとその健康への影響を研究するための新しいモデルを提供します.
科学分野:
- 神経科学は神経科学である.
- 遺伝学 遺伝学とは
- スリープ・メディシン (睡眠医学)
背景:
- 睡眠不足は,人間の健康とパフォーマンスに悪影響を及ぼします.
- 睡眠時間の習慣と睡眠不足に対する身体の反応は,人間の重要な特徴です.
- 以前の動物モデルでは,睡眠特性の直接的なヒトの遺伝子型-フェノタイプ相関が欠けていました.
研究 の 目的:
- 人間の短時間の睡眠現象型に寄与する遺伝的要因を特定する.
- 人間の睡眠ホメオスタシスを研究するための適切な動物モデルを開発する.
- 特定の人間の睡眠変異の生理学的影響を調査するために.
主な方法:
- 短時間の睡眠に関連した転写抑制剤の変異 (hDEC2-P385R) を特定しました.
- hDEC2-P385R変異を持つトランスジェニックマウスを作成しました.
- ミュータントマウスと対照マウスの活動プロファイルと睡眠パターンを様々な条件下で記録した.
主要な成果:
- トランスジェニックのマウスは,警戒時間が大幅に増加した.
- 変異したマウスは,対照群と比較して,総睡眠時間が短縮された.
- これらの睡眠の変化は,昼夜リズム (zeitgeber time) と,睡眠不足によるものでした.
結論:
- hDEC2-P385R変異は,ヒトの睡眠不足の遺伝的原因である.
- この変異を携えたトランス遺伝子マウスは,人間の睡眠ホメオスタシスの貴重なモデルとして機能する.
- このモデルは,睡眠の変化が身体的および精神的健康に及ぼす影響に関する研究を促進します.
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