血清アミロイドAタンパク質と冠動脈疾患との関連:二つの異なる動脈硬化プロセスからの証拠
A I Fyfe1, L S Rothenberg, F C DeBeer
1Department of Medicine, Molecular Biology Institute, UCLA, Los Angeles, Calif 90095-1679, USA. afyfe@medicine.medsch.ucla.edu
Circulation
|December 31, 1997
まとめ
血清アミロイドA (SAA) タンパク質の濃度は,自発的および移植に関連した冠動脈疾患の患者で上昇しています. これらの高いSAAレベルは,移植後の死亡率の増加と相関しており,炎症と動脈硬化症との関連を示唆しています.
科学分野:
- 心血管医学は,心臓血管医学である.
- 免疫学 免疫学とは
- 脂質代謝についてです.
背景:
- 血清アミロイドA (SAA) タンパク質は,高密度リポプロテイン (HDL) 機能に影響を与える炎症性アポリポプロテインです.
- SAA濃度の上昇は,不安定な冠動脈症候群と関連しています.
- 自発的または移植された冠動脈疾患 (CAD) のSAAレベルとタイプは,以前は知られていなかった.
研究 の 目的:
- 自発的および移植関連冠動脈疾患の患者におけるSAAタンパク質のレベルとタイプを決定する.
- SAAレベルと心血管疾患との関連を調査する.
- SAA,炎症,動脈硬化症の関係を調査する.
主な方法:
- 患者の血清におけるSAAレベルを定量化するための酵素関連免疫吸収測定法 (ELISA)
- 心臓移植患者および動脈硬化性CAD患者の血清の分析.
- SAAタンパク質の種類を特定するための免疫ボルトリング.
主要な成果:
- 平均SAAレベルは,正常な被験者と比較して,移植患者で有意に高かった (5倍).
- SAAレベルは,移植されたCADを患った患者とそれのない患者の間で上昇しました.
- SAA濃度の上昇は,移植後の死亡率の増加と関連していました.
- SAAレベルは,自発性動脈硬化性CADの患者でも,影響を受けていない親戚と比較して上昇しました.
- コルチコステロイド投与量,移植前のCAD,移植後のCADはSAAレベルを予測した.
結論:
- 環境によって決定されたSAAレベル上昇は,自発的なCADと移植CADの両方で存在します.
- 発見は,炎症,リポプロテイン代謝,動脈硬化症の発症の間の病理生理学的関連性を支持しています.
- SAAは冠動脈疾患の進行に役割を果たす可能性があります.
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