冠動脈疾患の逆行のための新しい病理生理学的メカニズムの証拠:LDL密度の肝臓リパース媒介の変化
A Zambon1, J E Hokanson, B G Brown
1Department of Medicine, Division of Metabolism, Endocrinology and Nutrition, University of Washington, Seattle, Wash. 98195-6426, USA.
Circulation
|April 20, 1999
まとめ
脂質低下療法では,低密度リポプロテイン (LDL) 粒子の密度を変化させることで,冠動脈疾患 (CAD) を改善します. この研究は,肝臓リパース (HL) 活性の変化が,CAD進行に対するこれらの好ましい効果の鍵であることを明らかにしています.
科学分野:
- 心血管医学 心血管医学
- 脂質代謝 脂質代謝とは
- 動脈硬化症の研究 動脈硬化症の研究
背景:
- 小さくて密度の高いLDL粒子は冠動脈疾患 (CAD) と関連しており,脂質低下療法中に疾患の進行を予測します.
- 家族性動脈硬化症治療研究 (FATS) での濃縮性脂質低下治療は,CADの有意な改善を示した.
- この研究は,LDL密度,肝脂酶 (HL),およびCAD進行の相互作用を調査しています.
研究 の 目的:
- LDL粒子の密度,肝臓リパース (HL) 活性,冠動脈疾患 (CAD) の進行との関係を調べる.
- 脂質変化療法によるCADに対する有益な効果の基礎となる新しい生物学的メカニズムを特定する.
- 異なる脂質低下療法がLDL密度とHL活動にどのように影響するか評価する.
主な方法:
- 記録された冠動脈疾患を有する88人のFATS参加者は,ロバスタチン-コレステロール,ニアシン-コレステロール,または従来の治療にランダムに割り当てられました.
- 血の肝脂質酶 (HL) と脂質タンパク質脂質酶,およびLDL密度が測定されました.
- LDL浮揚率とHL活動の変化は,冠動脈狭窄症の重度の変化と相関していた.
主要な成果:
- ローバスタチン-コレステロールとニアシン-コレステロールによる治療は,LDLの浮揚率 (それぞれ7.7%と10.3%) を著しく増加させ,HLの活性性を低下させました (それぞれ-14%と-17%).
- LDL浮揚率とHL活動の変化は,CAD重度の変化と強く関連していました (P<0.001).
- 増加したLDL浮気力は,CADの回帰の最も強い予測因子であり,冠動脈狭窄の変化のバリエーションの37%を説明しました.
結論:
- 治療による肝脂質酶 (HL) 活性の変化は,LDL粒子の密度を変化させ,CADの進行に好ましい影響を及ぼします.
- これは,脂質変化療法と冠動脈疾患の改善を結びつける,臨床的に重要な新しいメカニズムを表しています.
- この発見は,HL活動の調節がCADの管理のための実行可能な戦略であるという仮説を裏付けている.
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