冠動脈疾患のマルチロカス遺伝リスクスコア:症例対照および前向きコホート分析
Samuli Ripatti1, Emmi Tikkanen, Marju Orho-Melander
1Institute for Molecular Medicine Finland FIMM, University of Helsinki, Helsinki, Finland. samuli.ripatti@fi mm.fi
Lancet (London, England)
|October 26, 2010
まとめ
13個の単一核性子ポリモルフィズム (SNP) を用いた遺伝的リスクスコアは,冠動脈性心疾患 (CHD) のリスクが高い個人を特定します. このスコアは,最初のCHDイベントのリスクが70%増加したヨーロッパの祖先の20%の個人を特定するのに役立ちます.
科学分野:
- 心血管遺伝学 心血管遺伝学
- ゲノミクスゲノミクスとは
- エピデミオロジー エピデミオロジー
背景:
- 全ゲノム関連性研究 (GWAS) は,冠動脈性心疾患 (CHD) と関連した単一核酸多形態 (SNP) を特定しました.
- これらのSNPの発見の外部検証は,正確なリスク評価に不可欠です.
- 将来のコホート研究は,遺伝的関連を検証するための堅実な設計を提供します.
研究 の 目的:
- 最近発見された13のSNPをCHDとの関連性を検証する.
- 独立したコホートを使用して外部有効性を確立する.
- 遺伝的リスクスコア (GRS) を使用してCHDリスクを推定します.
主な方法:
- 13のSNPは,ケース・コントロールと前向きなコホートデザインでテストされました.
- 参加者:3829人のCHD症例,48,897人の対照群,30,725人の疾患のない個体.
- マルチロカス遺伝リスクスコア (GRS) をモデル化し,コックス比例リスクとロジスティック回帰を用いた.
主要な成果:
- GRSは,前向きなコホート分析における最初のCHDイベントと関連しています.
- GRSのトップクインチルは,心血管疾患のリスクが1.66倍増加したことを示した (従来の要因を調整した).
- GRSは統合的差別指数にわずかな効果を示したが,C指数や純再分類を大幅に改善することはなかった.
結論:
- CHDに関連した13のSNPのGRSは,欧州の祖先の20%の個人を ~70%のリスク増加で特定しています.
- この遺伝子パネルの臨床的有用性については,さらなる定義が必要である.
- 遺伝的リスクの階層化は,パーソナライズされたCHD予防戦略に役立ちます.
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