節奏を保ちながら歌詞を変えること: 歳をとる時の循環器の生物学
Fumiyuki Hatanaka1, Alejandro Ocampo2, Juan Carlos Izpisua Belmonte2
1Gene Expression Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA; Universidad Católica San Antonio de Murcia (UCAM), Guadalupe 30107 Murcia, Spain.
Cell
|August 13, 2017
まとめ
細胞の老化は 組織内の分子時計の 配線を変化させるが 核の時計の構成要素は変化しない カロリー摂取制限は これらの年齢関連の変化を 防ぐことができ 健康的な老化への洞察を与えてくれます
科学分野:
- ゲロントロジー
- クロノバイオロジー
- 分子生物学
背景:
- 生物学的老化と昼夜リズムとの関係は 長い間確立されていますが 基礎となる分子メカニズムは まだ十分に理解されていません
- 日常時計は多くの生理学的プロセスを調節し,その障害は年齢関連の疾患に 関与しています.
研究 の 目的:
- 生物時計の構成要素の 分子変化を 調べるため
- カロリー摂取制限によって サーカディアンシステムの年齢に関連する変化を緩和できるかどうかを判断する.
主な方法:
- 老齢と若い組織におけるコアクロック遺伝子発現とタンパク質レベルの分析
- 生体時計の調節における組織特有の分子適応の評価
- 年齢に伴うこれらの分子変化に対する長期のカロリー制限の影響の評価
主要な成果:
- 生物時計のコアコンポーネント (例えば,BMAL1,CLOCK,PER,CRY) は,老化とともに最小限の変化を示している.
- 老化は 重要な組織特異的な時計遺伝子ネットワークと 制御経路の再配線によって特徴付けられます
- カロリー制限は,年齢に関連した組織特有の分子再配線を効果的に防ぐ.
結論:
- 衰老は核の時計機構を根本的に変えないが,組織に依存した方法で特定の分子適応を誘導する.
- カロリー制限は 老化中の昼夜系の整合性を維持するための 潜在的介入です
- これらの発見は カロリー制限が老化と日経健康に 与える有益な影響の 分子基礎を 提供しています
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