炭水化物輸送体の活性化によるアミノグリコシドの増強剤としてのウリジン
Manon Lang1,2,3, Stéphane Renard3, Imane El-Meouche4
1Institut Pasteur, Université Paris Cité, CNRS UMR3525, Unité Plasticité du Génome Bactérien, 75015 Paris, France.
Science advances
|September 5, 2025
まとめ
科学者は 細菌がアミノグリコシド抗生物質を 糖質輸送機を通して吸収できることを発見しました 耐性感染症に対する抗生物質の有効性を改善し,臨床試験では有望であることが示されています.
科学分野:
- 微生物学
- 分子生物学
- 薬理学について
背景:
- アミノグリコシド (AG) は,グラム陰性細菌感染症の重要な抗生物質です.
- AGの吸収は膜電位に依存することが知られているが,エントリーメカニズムは完全に解明されていない.
- 抗生物質耐性との闘いには AG吸収の理解が不可欠です
研究 の 目的:
- 細菌におけるアミノグリコシド (AG) 吸収の新たな経路を特定する.
- 耐性菌株に対するAGの有効性を高める戦略を探求する.
- 補助療法としてのウリジンの可能性を調査する.
主な方法:
- *E. coli* の26の炭水化物トランスポーターを系統的に削除し,AG吸収におけるその役割を評価する.
- 定量的な吸収分析のために,光で標識されたAGとフローサイトメトリーを使用した.
- AG輸送炭水化物の誘導体を特定するために, *cmtA*-*gfp*レポーターシステムを含む198の炭素源をスクリーンしました.
主要な成果:
- 他のグラム陰性病原体で保存されているE. coli*の炭水化物輸送媒介による新しいAG吸収経路が特定されました.
- テストされた26の炭水化物中18がAGの吸収を促進することを示した.
- ウリジンは重要なAGインポートトランスポーターの強力な誘導体として特定され,AGの有効性をインビトロおよびインビボで有意に高めました.
- 尿素との併用療法により,ヒトの血液とマウスの尿路感染モデルにおける多剤耐性E. coliに対するAGの有効性が改善されました.
結論:
- 炭水化物トランスポーターは,グラム陰性細菌へのAG侵入の重要な,以前に認識されていない経路を表しています.
- 尿素はこれらのトランスポーターを調節し,細胞内AG濃度を増やすことで効果的な補助剤として作用します.
- AGとウリジンの組み合わせは,抗生物質耐性を克服し,治療結果を改善するための臨床的に重要な戦略の可能性があることを示しています.
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