BfrB-Bfd相互作用の小分子阻害剤 プセドモナス・エアルギノサ 適性および潜在的フッ素ヒノロン活性
Achala N D Punchi Hewage1, Huili Yao2, Baskar Nammalwar3
1Department of Chemistry , University of Kansas , 2030 Becker Drive , Lawrence , Kansas 66047 , United States.
Journal of the American Chemical Society
|May 1, 2019
まとめ
研究者は,細菌の鉄貯蔵タンパク質であるバクテリオフェリチン (BfrB) とフェレドキシン (Bfd) との相互作用を標的とした小分子阻害剤を開発した. これらの阻害剤は,P. aeruginosaにおける鉄の恒常性を破壊し,組み合わせ治療において潜在性を示しています.
科学分野:
- バクテリアの鉄の恒常性
- タンパク質相互作用阻害剤
- 薬物の発見
背景:
- バクテリオフェリチン (BfrB) は,バクテリアの鉄貯蔵とホメオスタシスに不可欠です.
- フェレドキシン (Bfd) によるBfrBからの鉄の動員は,P. aeruginosaの細胞溶融鉄のレベルを調節する.
- タンパク質とタンパク質の相互作用をターゲットにすることで 新しい治療戦略が生まれます
研究 の 目的:
- BfrB-Bfdタンパク質相互作用の小分子阻害剤を開発する.
- これらの阻害剤がP. aeruginosaの鉄同位体と成長に与える影響を調査する.
- これらの阻害剤と抗生物質の組み合わせの可能性を評価する.
主な方法:
- 断片スクリーニングに基づく構造ガイドドラッグデザイン
- 4-置換されたイソインドリン-1,3-ダイオンの同類物の合成と特徴付け.
- 成長抑制と鉄の染色を含むP. aeruginosaを用いたin vitroおよびin vivo検査
主要な成果:
- BfrBをBfdの結合部位に選択的に結合するアイソインドリン類が開発された.
- 抑制剤は,P. aeruginosaの量に依存した成長阻害とピオベルディンの過剰生産を引き起こした.
- アナログはBfrBに鉄の蓄積と細胞溶液の枯渇をもたらし,ネイティブのPAGEとFerene S染色によって確認されました.
- フルオロキノロンとの併用療法により,P. aeruginosaの生存率が著しく低下しました.
結論:
- BfrB- Bfdの相互作用を標的とする小分子阻害剤は,細菌の鉄の恒常性を効果的に乱します.
- これらの発見は,細菌の鉄貯蔵におけるタンパク質相互作用を標的とする概念の証明を示しています.
- 開発された類似薬は,既存の抗生物質治療の補助薬として有望である.
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