生理学的健康 年齢 (PhysAge):新しい多システム分子時計が高齢者の健康と死亡率を予測する
Thalida Em Arpawong1, Belinda Hernandez2, Claire Potter3
1Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, 90089, USA. arpawong@usc.edu.
GeroScience
|September 1, 2025
まとめ
新しいDNAメチル化ベースの生理学的健康年齢 (PhysAge) スコアを開発し,一般的な臨床バイオマーカーを使用しました. PhysAgeは 既存の表遺伝的な時計と 比較して 健康状態や死亡率を正確に予測します
科学分野:
- エピジェネティクス
- ゲロントロジー
- バイオマーカーの発見
背景:
- エピジェネティック時計は 生物学的老化を測定する 分子時計です
- 既存の時計は 老化のペースを把握し 健康状態を予測する能力が 異なるものです
- アクセシブルなデータから得られた多システム生理学的老化測定が必要である.
研究 の 目的:
- DNAメチル化ベースの生理学的健康年齢 (PhysAge) スコアを開発し,検証する.
- 死亡率と年齢関連の臨床測定を予測するPhysAgeの能力を評価する.
- PhysAgeと現存する 遺伝子表表時計を比較する PhenoAge,GrimAge2,DunedinPACE
主な方法:
- 常見の臨床バイオマーカー (CRP,ピークフロー,脈圧,HDLコレステロール,Hba1c,WHR,シスタチンC,DHEAS) から8つのDNAメチル化サロゲットを用いて開発した.
- アメリカの健康と退職研究 (HRS) のコホートで訓練され,テストされたPhysAge.
- アイリッシュ・ロングティチューディナル・スタディ・オブ・エイジング (TILDA) とNICOLAコホートでの検証結果
主要な成果:
- PhysAgeは,健康に関する測定値の予測において,既存の表遺伝子時計と比べられる性能を示した.
- 死亡率データに関する訓練を受けていないにもかかわらず,PhysAgeの死亡率予測はGrimAge2と区別できませんでした.
- 個々のPhysAgeの代用薬は,健康上の結果を予測する際に,しばしば測定された臨床的値を上回った.
結論:
- DNAメチル化フィザージスコアは,多システム生理学的老化の強力なバイオマーカーとして機能します.
- PhysAgeは臨床モニタリングと クロス・スタディ/カントリー・ヘルス・比較に役立つ.
- このアプローチは,老化の進行を評価するために,すぐに利用可能な臨床データを活用します.
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