関連する実験動画
内皮機能不全は,ヒトにおける高正常範囲のコレステロールレベルと関連しています
H O Steinberg1, B Bayazeed, G Hook
1Indiana University Medical Center and the Richard L. Roudebush Veterans Affairs Medical Center, Indianapolis 46202-5111, USA.
Circulation
|December 13, 1997
まとめ
高レベルのコレステロールは,正常な範囲内であっても,血管の機能を損なう. この内皮機能不全は,心血管疾患のリスクを増やす可能性があります.
科学分野:
- 心血管生理学 心血管の生理学
- 内皮機能の機能について
- 脂質代謝 脂質代謝とは
背景:
- 心血管健康におけるコレステロールの役割はよく知られていますが,血管機能に対する正常範囲内のコレステロールの影響はあまり理解されていません.
- 内皮機能不全は,動脈硬化症とマクロ血管疾患の早期マーカーです.
研究 の 目的:
- コレステロールレベルが正常範囲内にあることと,内皮に依存した血管拡張との関連を調査する.
- 高正常コレステロールが血管機能障害と関連しているという仮説を検証する.
主な方法:
- エンドセリウム依存 (メタコリン塩化物) および エンドセリウム依存 (ナトリウムニトロプルーシド) 血管拡張剤に対する足の血流 (LBF) の反応を評価した.
- 総コレステロールレベルが正常範囲内の幅広い範囲の健康なボランティアを募集しました.
- 低正常と高正常のコレステロールレベルを持つ被験者間のLBF応答を比較した.
主要な成果:
- 足の血流 (LBF) は,両方の血管拡張剤で用量依存的に増加しました.
- 低正常コレステロールと比較して,高正常コレステロールの被験者において,内皮に依存する血管拡張が有意に鈍化した.
- 最大の内皮に依存する血管拡張は,高正常コレステロール群でほぼ50%減少しました.
- トータルコレステロールとLDLコレステロールのレベルと最大限の内皮に依存する血管拡張の間で,有意な負の相関が観察されました.
- グループ間では,エンドセリウム独立系血管拡張剤への反応において有意な差異は認められなかった.
結論:
- コレステロールレベルと内皮に依存した血管拡張の間には逆の関係がある.
- 正常範囲内のコレステロールレベルは,内皮機能不全と関連している可能性があります.
- このサブクリニック内皮機能不全は,コレステロール値上昇に関連したマクロ血管疾患のリスク増加に寄与する可能性があります.
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