ジャヌス・ケレーターは,特殊なダイナミックレンジで生化学的に反応するMRIコントラストを可能にします
Eric M Gale1, Chloe M Jones1, Ian Ramsay1
1The Athinoula A. Martinos Center for Biomedical Imaging, The Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School , 149 Thirteenth Street, Suite 2301, Charlestown, Massachusetts 02129, United States.
Journal of the American Chemical Society
|December 15, 2016
まとめ
研究者は,マンガン (Mn) 基の新しいMRIコントラスト剤を"Janus"リガンドで開発しました. この薬剤は,生物学的信号に反応して,Mn3+とMn2+の酸化状態を切り替えることで,9倍のリラクシビティ変化を示します.
科学分野:
- 生物化学
- 医療用イメージング
- 材料科学
背景:
- 現在のMRIコントラスト剤は 反応能力に限界があります
- 生物学的環境に基づいて 性質を変えるエージェントの開発は 極めて重要です
研究 の 目的:
- マンガン (Mn) ベースの新しい生化学反応性MRIコントラスト剤を導入する.
- 酸化状態のスイッチングによる緩解性の有意な変化を証明する.
主な方法:
- Mn3+またはMn2+結合を好むようにイソメリゼーションを行うことができる"Janus"リガンドを設計した.
- 生物学的条件下でMn3+とMn2+複合体の安定性を調査した.
- 酸化のためのペロキシダース活性と,相互変換への還元のためのL-システインを使用した.
主要な成果:
- Mn3+とMn2+の酸化状態を切り替えることで,リラクシビティの9倍の変化を達成した.
- ジャヌス・リガンドは,生物学的環境で安定したMn3+とMn2+複合体をサポートする.
- 生物学的要因によって媒介される酸化状態の急速な相互変換が示されている.
結論:
- ジャヌスシステムは生化学的に反応するMRIコントラスト剤の設計のための新しいパラダイムを表しています.
- このアプローチにより,MRIコントラスト剤は生物学的活性についてダイナミックに報告することができます.
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