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Cholesterol Efflux Assay
Published on: March 6, 2012
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高密度リポプロテイン欠乏症における細胞フォスフォリピドとコレステロールの流出
Michel Marcil1, Rachel Bissonnette, Jérôme Vincent
1Department of Cardiovascular Genetics, McGill University Health Centre, Montréal, Canada.
Circulation
|March 19, 2003
まとめ
低高密度リポタンパク質コレステロール (HDL-C) は,様々な原因から生じる可能性があります. 細胞のコレステロール流出はHDL-Cと関連しているが,HDL-C濃度の上昇の主な原因ではないかもしれない.
科学分野:
- 心血管研究 循環器科の研究
- 脂質代謝についてです.
- 遺伝学 遺伝学とは
背景:
- 将来の研究は,冠動脈疾患と低高密度の脂質タンパク質コレステロール (HDL-C) を関連付けています.
- ハイポアルファリポプロテイン血症 (HypoA) は,HDL-Cが5パーセント以下であると定義されています.
研究 の 目的:
- ヒポアルファリポプロテイン血症 (HypoA) の根本的な原因を調査する.
- HDL-Cレベルを調節する細胞のコレステロールとフォスホリピド流出の役割を決定する.
主な方法:
- 測定されたアポリポプロテインAI媒介のコレステロールとフォスフォリピド流出が,HypoA被験者および対照者からの線維芽細胞で測定された.
- HDL-Cレベルを評価し,流出量測定値と相関させた.
- ABCA1遺伝子の変異を基因的にスクリーニングします.
主要な成果:
- フォスフォリピド流出欠陥は,13人のHypoA被験者 (20%) で特定されました.
- タンジャール病または家族性HDL欠乏症は,HypoA症例の16%を占めました.
- コレステロール流出とHDL-Cは,HypoA被験者に相関していましたが,この関係は,より高いHDL-Cレベルでは減少しました.
結論:
- 細胞流出は,特にABCA1.1経由の初期高密度リポプロテイン (HDL) 形成に不可欠です.
- 正常レベルを超えて,放出量が増加しても,必ずしもプラズマのHDL-Cを増加させるわけではありません.
- 他のプラズマ要因は,HDL-C全体のレベルを著しく調節する.
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