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Aβ-アグレガットへの結合によって促進されたペロキシニトリートの比分画像化のためのESIPTプローブ
Adam C Sedgwick1,2, Wei-Tao Dou3, Jin-Biao Jiao3
1Department of Chemistry , University of Bath , Bath BA2 7AY , U.K.
Journal of the American Chemical Society
|October 3, 2018
まとめ
新しい光探知器はペロキシニート (ONOO-) とアミロイド-β (Aβ) アグレガットを検出します. この突破により 繊維状のタンパク質と 反応性酸素/窒素の種を同時に検出できます
科学分野:
- 生物化学
- 化学生物学
- 材料科学
背景:
- アミロイド-β (Aβ) アグリゲーションは神経変性疾患に関与しています.
- ペロキシニトライト (ONOO-) は酸化ストレスと病原性に関与する反応性窒素種である.
- AβとONOO-を同時に検出するための選択的探査機の開発は困難です.
研究 の 目的:
- 刺激状態のプロトン内移転 (ESIPT) を利用した,新しい3-ヒドロキシフラボン (3-HF) ベースの光探査機を開発する.
- 探査機が,ONOO-の存在下でのAβの異なる結合状態をイメージする能力を調査する.
- Aβ と ONOO- の同時検出のためのホスト・ゲスト・アンサンブルの開発を調査する.
主な方法:
- 3-ヒドロキシフラボン (3-HF) ベースの光センサーの合成
- ミセラー環境におけるONOO-に対する探査機の反応の評価.
- ONOO-の存在下でのAβ集積のイメージングのための探査機の適用
- 3HF-OMe探査機がAβ集積に結合した時の比数学的反応の特徴
主要な成果:
- 環境に敏感な性質を持つ 3-HF ESIPT ボロナートベースの光探査機を開発した.
- ミセラー環境で,ONOO-に対するプローブの比率的な反応を示した.
- ONOO-の存在下でのAβの異なる結合状態を成功裏にイメージした.
- 3-HF-OMe探査機は,Aβ集積と結合すると,新しい宿主-ゲストアンサンブルを形成する割合測定反応を示した.
結論:
- 開発された3HF ESIPT探査機は,ONOO-を検出するのに有効です.
- これらの探査機は,ONOO-存在の文脈でAβ集積状態を可視化することができます.
- 3HF-OMe探査機のホスト・ゲスト・アンサンブルは,繊維タンパク質と反応性の種を同時に検出するための新しい戦略を提供します.
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