抗生物質耐性要素の時間的変化がファグと病原体の衝突を制御する
Kristen N LeGault1, Stephanie G Hays1, Angus Angermeyer1
1Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA.
Science (New York, N.Y.)
|July 30, 2021
まとめ
バクテリオファージは バクテリアの防御システムの進化を促します ビブリオ・コレラのSXT要素のようなものです 菌糸体感染は 抗生物質耐性遺伝子を 移動性要素を通じて 拡散させます
科学分野:
- 微生物学
- ゲノミクス
- 進化生物学
背景:
- バクテリオファージの捕食は 抗菌体の進化を促します
- これらのシステムは しばしば 細菌のゲノム内の 動員可能な防御島に集まります
- ファージ-細菌の共進化を理解することは,ファージ療法と病原体の進化の洞察にとって極めて重要です.
研究 の 目的:
- 臨床的なVibrio choleraeにおけるファグ・バクテリアの適応ダイナミクスを調査する.
- 移動性遺伝子要素に対するファグ耐性決定因子をマップする.
- ファージの逆適応と細菌の防御のメカニズムを特定する.
主な方法:
- Vibrio choleraeのサンプルで タイムシフト実験を行いました
- SXT統合性および結合性要素 (ICE) に対するファグ耐性遺伝子のマッピング.
- 菌糸体による防御阻害剤と 菌糸体抵抗性のメカニズムを特定する.
主要な成果:
- 臨床サンプルにおけるVibrio choleraeファグ耐性の変動が観察された.
- ファグ耐性決定因子の主要な媒介体としてSXT ICEを特定した.
- ファージの防御メカニズムと,新しいファージでコードされた防御阻害剤を記録した.
- 菌糸体感染は高頻度のSXT ICE結合を誘発し 菌糸体と抗生物質の耐性を拡散させた.
結論:
- SXT ICEは,防御と抵抗の両方の拡散を媒介するファグ-細菌共同進化の中心です.
- ファージはバクテリアの防御を克服し,新しいファージでコードされた阻害剤さえ選択することができます.
- 病原菌と宿主との相互作用は,臨床環境で病原菌と抗生物質耐性の同時拡散を促します.
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