1H溶解による迅速かつ単純なC-ハイパーポラライゼーション ダイナミックな核極化とインライン磁場逆転
Quentin Stern1, Quentin Reynard-Feytis1, Stuart J Elliott1,2
1Université Claude Bernard Lyon 1, CRMN UMR-5082, CNRS, ENS Lyon, Villeurbanne 69100 France.
Journal of the American Chemical Society
|December 6, 2023
まとめ
溶解ダイナミック核極化 (dDNP) は,より速い1H極化と13C移転をリアルタイムでメタボリックイメージングに提供しています. この簡素化された方法は 数分で 重要な分極化を実現し 癌の研究を助長します
科学分野:
- 磁気共鳴スペクトル
- 医療用イメージング
- 生物化学
背景:
- 溶解ダイナミック核極化 (dDNP) は,体内の代謝イメージングのために13C代謝物を高極化します.
- 現在のdDNP方法は,1〜2時間 (直接) または20分で (1Hクロスポラライゼーション経由) で高い13Cの極化を達成する.
- 1Hの対極化には複雑な機器と熟練した人員が必要です.
研究 の 目的:
- ハイパーポラライズされた13Cメタボリート製剤の代替,簡素化されたdDNP経路を探求する.
- 液体状態で迅速な1H極化と効率的な1Hから13Cの極化移転を達成する.
主な方法:
- 固体状態で5〜10分で70%以上の極化を達成するために1H dDNPを使用しました.
- 液体状態でのインラインアディアバティック磁場逆転がサンプル移転中に実施された.
- 1H → 13Cの極化移転のためのレバレッジされたJカップリングは,ゼロフィールドでのアンチレベルクロスを経由します.
主要な成果:
- 約5〜10分で素早く固体1Hの極化 (> 70%) を達成する.
- 3-13C-ピルベートと13C-フォーマットでは,液体状態の13C極化が~17%まで示されている.
- 必要な追加の計測器はシンプルで,従来のdDNPポラライザーで簡単に組み立てられます.
結論:
- この新しいアプローチは,ハイパーポラライズされた13C代謝物を作る時間を大幅に短縮します.
- 簡素化された計測器は,この方法をin vivoアプリケーションでより容易に行うことができます.
- MRI/NMRを用いて癌細胞の代謝をリアルタイムでより迅速にモニタリングできます.
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