脂質タンパク質の血濃度 (a) と将来の脳卒中のリスク
P M Ridker1, M J Stampfer, C H Hennekens
1Division of Preventive Medicine, Brigham and Women's Hospital, Boston, MA 02115-1204, USA.
JAMA
|April 26, 1995
まとめ
この研究では,中年男性におけるリポプロテイン (a) レベルと将来の脳卒中リスクとの間に関連性がないことが判明しました. リポプロテイン (Lp) の濃度は,この大きな前向きなコホートで脳卒中を予測しなかった.
科学分野:
- 心血管医学 心血管医学
- エピデミオロジー エピデミオロジー
- バイオケミストリー バイオケミストリー
背景:
- リポプロテイン (lipoprotein) (Lp(a)) は,動脈硬化症に関与するリポプロテイン粒子である.
- 高濃度のLp (a) は,脳卒中を含む心血管疾患の危険因子と考えられています.
- しかし,ベースラインのLp(a) 濃度と将来の脳卒中リスクの間の特定の関連は,さらなる見通し調査を必要とする.
研究 の 目的:
- リポプロテイン (Lp) の血濃度と将来の脳卒中のリスクとの関連性を前向きに評価する.
- 健康な男性コホートにおける脳卒中の発生率を予測するバイオマーカーとしてLp(a) レベルが役立つかどうかを判断する.
主な方法:
- Physicians' Health Studyのコホートの中で,ネストされた症例対照研究が行われました.
- 脳卒中を経験した198人の男性医師の血サンプルをLp (a) 濃度について分析した.
- コントロール群は年齢と喫煙習慣に合わせ,分析は心血管疾患のリスク因子に調整された.
主要な成果:
- 中央値Lp(a) 濃度または分布の有意な差は,発症時の脳卒中症例と対照群の間には観察されなかった.
- 増加するLp (a) パーセンチルにおける脳卒中の調整された相対リスクは一貫して非有意であった.
- Lp(a) と脳卒中リスク (血栓塞栓性イベントを含む) と,または高コレステロール血症によって層分化された分析では関連性が見つかりませんでした.
結論:
- ベースラインの血脂タンパク質 (a) 濃度は,主に白人,健康な中年男性において,将来の全身性または血栓栓性脳卒中のリスクの増加と関連していません.
- これらの発見は,Lp (a) がこの集団における脳卒中の有意な独立した予測因子ではないことを示唆しています.
- 異なる集団または特定の脳卒中サブタイプにおけるLp (a) 関連性を調査するために,さらなる研究が必要になる可能性があります.
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