高コレステロール血症における前腕の抵抗性血管の内皮に依存した血管拡張の障害
P J Chowienczyk1, G F Watts, J R Cockcroft
1Department of Clinical Pharmacology, St Thomas' Hospital, London, UK.
Lancet (London, England)
|December 12, 1992
まとめ
高コレステロールは,心臓以外の血管の機能を損なう. この研究では,高コレステロール血症における全般的な内皮機能障害が,前腕の血管に影響を与え,特定の分子欠陥を示唆することを発見しました.
科学分野:
- 心血管生理学 心血管の生理学
- 血管生物学 血管生物学
- メタボリック障害 メタボリック障害
背景:
- 内皮に依存する血管拡張は,血管の健康にとって極めて重要です.
- 高コレステロール血症は,特に冠動脈循環における,内皮機能不全と関連しています.
- 高コレステロール血症における他の血管床における内皮機能障害の程度は議論されている.
研究 の 目的:
- 高コレステロール血症の人の前腕の抵抗血管における血管拡張反応を調査する.
- アセチルコリン,メタコリン,ナトリウムニトロプロシドに対する反応を,高コレステロール血症とノルモコレステロール血症の被験者間で比較するために.
- 高コレステロール血症の内皮機能不全が一般化されているかどうかを判断する.
主な方法:
- 主要高コレステロール血症の男性12人と,ノルモコレステロール血症の男性12人の対照群を募集した.
- アセチルコリン,メタコリン,ナトリウムニトロプロシドを用いた前腕の血管拡張反応の評価.
- 血管拡張剤の投与量増加に反応する血流の変化の測定.
主要な成果:
- エンドセリウムに依存するアセチルコリンへの血管拡張は,高コレステロール症の被験者において有意に低下した.
- 内皮独立系血管拡張剤ナトリウムニトロプルシドに対する反応において,有意な差異は観察されなかった.
- また,内皮に依存する血管拡張剤であるメタコリンに対する反応は,グループによって有意に異なるものではありませんでした.
結論:
- 高コレステロール血症における内皮機能不全は,冠動脈循環に限らず,一般的です.
- アセチルコリン反応の選択的障害は,内皮経路内の特定の分子欠陥を示唆しています.
- 研究結果は,高コレステロール血症が血管機能に及ぼす広範な影響を強調しています.
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