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バクテリアの競争によるStaphylococcus aureusの最後の抗生物質に対する耐性の進化
Gudrun Koch1, Ana Yepes1, Konrad U Förstner2
1Research Centre for Infectious Diseases (ZINF), University of Würzburg, Würzburg 97080, Germany.
Cell
|August 30, 2014
まとめ
バクテリアの競争が抗生物質耐性を引き起こす可能性があります. メチシリン耐性である黄金球菌 (Staphylococcus aureus) は,抗生物質の使用だけでなく,競合する相互作用を通じて,バンコマイシン (VISA) に耐性のある菌株を進化させた.
科学分野:
- 微生物学 微生物学とは
- 進化生物学の進化生物学について
- 医学科学 医学科学 医学科学 医学科学
背景:
- 抗生物質耐性は,世界的な健康上の重大な脅威です.
- 抗生物質の使用は既知の要因であるが,代替的な耐性メカニズムが調査されている.
- メチチリン耐性黄色のスタフィロコクス (MRSA) は,治療に重大な課題を抱えています.
研究 の 目的:
- バクテリアの抗生物質耐性開発のための代替経路を調査する.
- 臨床的に重要な耐性フェノタイプを生成するバクテリア間の競争の役割を調査する.
- バンコマイシン中介型黄金球菌 (VISA) 菌株の進化を理解するために.
主な方法:
- メチシリン耐性黄金球菌 (MRSA) 菌株の多様化に関する観察研究.
- サーファクタントおよびバクテリオシン生産などの競争上の優位性のために進化した菌株の分析.
- バンコマイシンの中間耐性を含む抗生物質耐性プロファイルの評価.
- マウス感染モデルを用いたin vivo検証.
主要な成果:
- MRSAの単離は,競争的な相互作用によって,2つの株に自発的に多様化しました.
- 最初の菌株は,表面活性物質とバクテリオシン分泌による増殖を示した.
- 2番目の菌株は,バクテリオシンに対する耐性を進化させ,バンコマイシン中間耐性 (VISA) を示した.
- 菌株の多様化と結果として生じるフェノタイプは,マウスのインビボ感染中に観察されました.
結論:
- バクテリアの競争は,抗生物質耐性の重要な原動力である可能性があります.
- この競争的な共進化メカニズムは,VISAを含む重要な臨床抗生物質耐性フェノタイプを生成することができます.
- これらの代替レジスタンス経路を理解することは,治療が難しい感染症との闘いにおいて極めて重要です.
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