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Isolation and Analysis of Plasma Lipoproteins by Ultracentrifugation
Published on: January 28, 2021
アポリポプロテインC-IIIと,高トリグリセリデミアの代謝的基礎と,濃厚な低密度リポプロテインのフェノタイプ
Chunyu Zheng1, Christina Khoo, Jeremy Furtado
1Department of Nutrition, Harvard School of Public Health, Boston, MA 02115, USA.
Circulation
|April 7, 2010
まとめ
アポリポプロテインC-III (apoC-III) は,非常に低密度リポプロテイン (VLDL) のクリアランスを低下させることにより,高トリグリセリデミアに重要な役割を果たします. このApoEからApoC-IIIの支配へのシフトは,トリグリセリドに富んだリポタンパク質の除去が減少し,LDLの形成が密集します.
科学分野:
- 脂質代謝と心血管疾患の研究.
- リポタンパク質の構造と機能の生化学.
背景:
- ハイパートリグリセリデミアは,アポリポプロテイン (apo) B脂質タンパク質代謝の欠陥と関連しています.
- アポリポプロテインC-III (apoC-III) とアポリポプロテインE (apoE) は,リポプロテインの処理を調節する上で重要である.
研究 の 目的:
- アポリポプロテインBのリポプロテイン代謝の特定の欠陥を特定し,高トリグリセリデミアを特徴とする.
- これらの代謝変化におけるapoC-IIIとapoEの役割を調査する.
主な方法:
- 抗アポC-IIIと抗アポEの免疫親和染色法と超遠心分離を用いて,21のサブクラクションでプラズマのアポB輸送を研究した.
- 9人のハイパートリグリセリデミア患者と12人のノルモトリグリセリデミア対照群を比較した.
主要な成果:
- ハイパートリグリセリデミアは,アポC-IIIがアポEではないVLDLの肝臓分泌が3倍に増加し,アポC-IIIとアポEの両方でVLDLが50%減少しました.
- 軽量のVLDLおよびアポEを含むトリグリセリド豊富なリポタンパク質のクリアランスの低下は,ハイパートリグリセリデミアで観察され,上昇したアポC-IIIと関連していました.
- LDLの分布は,変化したVLDL流量,変化した肝臓分泌,増加した変換,および遅れた分解により,密度の高いLDLへとシフトした.
結論:
- ApoC-IIIは,高トリグリセリデミアを引き起こす代謝欠陥の中心です.
- リポプロテインの代謝は,高トリグリセリデミアでは,アポEが支配するシステムからアポC-IIIが支配するシステムに変化します.
- このシフトにより,トリグリセリドに富んだリポタンパク質のクリアランスとLDLフェノタイプが低下する.
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