非生産的な形交差点を遮断することによって,効率的な遠赤/近赤外線を吸収するBODIPYフォトケージ
Pradeep Shrestha1, Komadhie C Dissanayake1, Elizabeth J Gehrmann1
1Department of Chemistry, Iowa State University, 1608 Gilman Hall, Ames, Iowa 50010, United States.
Journal of the American Chemical Society
|August 14, 2020
まとめ
研究者らは,深層組織への適用のために近赤外線を吸収する新しいBODIPYフォトケージを開発しました. これらの改良されたフォトケージは,生物分子の活性化と光療法の以前の制限を克服して,著しく高い光放出効率を示しています.
科学分野:
- 写真化学
- 有機化学
- 生物分子工学
背景:
- 光細胞は 制御された生物分子の活性化を 光で可能にします
- 遠赤/近赤外線を吸収するフォトケージは,深層組織への適用に不可欠です.
- 既存の近赤外線BODIPYフォトケージは,光放出効率が低い.
研究 の 目的:
- 近赤外線を吸収するBODIPYフォトケージの光放出効率を高めるため.
- 深層組織生物分子の活性化と光療法に適した光ケージを開発する.
- フォトケージの量子生産性を向上させるための戦略を調査する.
主な方法:
- ボロンメチル化BODIPYフォトケージを合成した.
- 興奮状態のダイナミックシミュレーションを使って 崩壊経路を特定した.
- 1,7-ダイアリル置換がフォトリレーズに与える影響を研究した.
- トリパンブルーの排除を用いて細胞毒性を評価した.
- ヘラ細胞の光活性化が示された.
主要な成果:
- 700 nm 近くで強く吸収する BODIPY フォトケージが発達した.
- 最良の誘導体の680nmで4650M−1cm−1の量子効率を達成した.
- 新しいフォトケージは,以前の長い波長のBODIPYフォトケージと比較して,量子効率の50倍の増加を示しています.
- 1,7-ディアリル置換は量子収量を改善し,イオンペア再結合を減少させた.
- 20μMの濃度で細胞に毒性はない.
結論:
- 非生産的な興奮状態の崩壊チャネルを阻害することで,写真ケージの効率が効果的に改善されます.
- コンフォーメーション的に抑制されたボロンメチル化されたBODIPY構造は,近赤外線写真キャジングに有望である.
- 開発されたフォトケージは,深部組織への応用のために性能を向上させます.
- この戦略は,より効率的な光反応を設計するための経路を提供します.
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