動脈硬化症における抗酸化物質の臨床試験:我々は正しいことをしているのか?
1University of California, San Diego, Department of Medicine, La Jolla 92093-0682, USA.
Lancet (London, England)
|July 1, 1995
まとめ
低密度脂質タンパク質 (LDL) の酸化変化が動脈硬化に寄与する. 抗酸化物質は,動物モデルでのこのプロセスを著しく遅らせ,その治療的可能性をサポートします.
科学分野:
- 心血管研究 循環器科の研究
- 酸化ストレス生物学 生物学
- 動脈硬化症の病原性 病原性
背景:
- 低密度脂質タンパク質 (LDL) の酸化変異は,動脈硬化症の発達における重要な仮説である.
- 酸化されたLDLは,変化した生物学的特性を示し,潜在的にアテロゲン性を高めます.
- これらの特性の正確なin vivoメカニズムと相対的な重要性については,まだ調査中です.
研究 の 目的:
- 動脈硬化症の進行におけるLDLの酸化変化の役割を評価する.
- 実験的な動脈硬化症の緩和における抗酸化物質の有効性を評価する.
主な方法:
- 動脈硬化症のインビトロ発見と動物モデルのレビュー.
- 様々な動物モデル (例えば,LDL受容体欠乏ウサギ,コレステロールを摂取したウサギ,非ヒト霊長類) での抗酸化剤の介入を調査した18件の公表された研究の分析.
主要な成果:
- 18件の研究のうち13件で,強い肯定的な結果を示し,病変の進行が50~80%減少した.
- 2つの研究はわずかにポジティブな結果を出しており,3つの研究はネガティブでした.
- 4つの異なる抗酸化化合物 (プロブコル,BHT,DPPD,ビタミンE) が有効性を示しました.
結論:
- 抗酸化物質は,複数の実験モデルで,アテロゲン系プロセスを効果的に遅らせることができます.
- 異なる抗酸化物質における一貫した結果は,抗酸化物質の潜在力を通じてその作用メカニズムをサポートしています.
- 酸化されたLDLのアテロゲニシティの正確なインビボメカニズムを明らかにするために,さらなる研究が必要である.
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