フォスファディチルコリンの腸内細菌の代謝は,心血管疾患を促進します
Zeneng Wang1, Elizabeth Klipfell, Brian J Bennett
1Department of Cell Biology, Cleveland Clinic, Cleveland, Ohio 44195, USA.
Nature
|April 9, 2011
まとめ
メタボロミクスは,コレイン,トリメチラミンN酸化物 (TMAO),およびベタインを,心血管疾患 (CVD) リスクを予測するプラズマ代謝物質として特定しました. 腸内細菌と食事はこれらの代謝産物に影響を与え,動脈硬化症の発症に影響を与えます.
科学分野:
- バイオケミストリー バイオケミストリー
- 心血管科学 心血管科学
- マイクロバイオーム研究
背景:
- 心血管疾患 (CVD) は,世界の主要な死因です.
- メタボロミクスは,病気に関連する経路を明らかにするための有望なアプローチを提供します.
- CVDリスクの新たなバイオマーカーを特定することは,予防と治療において極めて重要です.
研究 の 目的:
- CVDのリスクを予測する小分子メタボリートのプラズマの無偏見の識別のためにメタボロミクスを活用する.
- 特定された代謝産物とその代謝経路が,動脈硬化病原性における役割を調査する.
- ダイエット,腸内微生物群,および代謝産物生産とCVDリスクに対する遺伝因子の影響を調査する.
主な方法:
- 血代謝プロファイリングは,CVDリスクに関連する小分子を特定するために行われました.
- 3つの主要な代謝物質であるコリン,トリメチラミンN酸化物 (TMAO),ベタインを特定した.
- ネズミ (細菌のないモデルを含む) の体内試験は,これらの代謝産物の動脈硬化,マクロファージ機能,および腸内細菌の役割への影響を評価するために使用されました.
主要な成果:
- コリン,TMAO,ベタインは,大規模な臨床コホートにおけるCVDリスクの予測因子として特定されました.
- コリンまたはTMAOを摂取したサプリメントは,マクロファージのスキャベンジャー受容体を向上させることで,マウスの動脈硬化を促進した.
- 腸内微生物群は,食事中のコレリンからTMAOの産生を決定的に媒介し,コレステロールの蓄積と泡細胞形成に影響を与え,腸内細菌の抑制はコレリン強化性動脈硬化症を抑制する.
結論:
- 食中のホスファティディルコリンの代謝,特に腸内微生物群によるTMAOへの変換は,心血管疾患の病原化に関連しています.
- これらの発見は,動脈硬化症における腸内植物に依存した代謝を含む新しい経路を明らかにしています.
- 特定された代謝産物と経路は,動脈硬化性心疾患の新たな診断ツールと治療戦略の潜在的なターゲットを示しています.
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