在Staphylococcus aureus中通过细菌竞争对最后手段抗生素的耐药性的演变
Gudrun Koch1, Ana Yepes1, Konrad U Förstner2
1Research Centre for Infectious Diseases (ZINF), University of Würzburg, Würzburg 97080, Germany.
Cell
|August 30, 2014
概括
细菌竞争可以驱动抗生素耐药性. 耐甲基黄金葡萄球菌 (Staphylococcus aureus) 通过竞争性相互作用,而不是仅仅通过使用抗生素,进化出了耐万科素 (VISA) 的菌株.
科学领域:
- 微生物学 微生物学
- 进化生物学 进化生物学
- 医学科学 医学科学 医学科学
背景情况:
- 抗生素耐药性是一个关键的全球健康威胁.
- 虽然抗生素使用是已知的驱动因素,但正在探索替代性耐药机制.
- 甲素耐药黄金葡萄球菌 (MRSA) 带来了重大治疗挑战.
研究的目的:
- 研究一种替代途径,用于细菌中抗生素耐药性的发展.
- 探索细菌间竞争在产生临床相关的耐药性表型中的作用.
- 为了了解万科米辛中间体黄金葡萄球菌 (VISA) 菌株的演变.
主要方法:
- 对抗甲素的黄金葡萄球菌 (MRSA) 菌株多样化的观察性研究.
- 对进化菌株进行分析,以获得竞争优势,例如表面活性剂和细菌素生产.
- 对抗生素耐药性概况的评估,包括对万科米辛的中间耐药性.
- 使用小鼠感染模型进行体内验证.
主要成果:
- 通过竞争性相互作用,MRSA分离物自发地多样化为两个菌株.
- 第一个菌株通过表面活性剂和细菌素分泌表现出增强的生长.
- 第二个菌株对细菌产生了耐药性,并表现出万科米中间耐药性 (VISA).
- 在体内小鼠感染期间观察到菌株多样化和由此产生的表型.
结论:
- 细菌竞争可能是抗生素耐药性的重要驱动因素.
- 这种竞争性的共同进化机制可以产生关键的临床抗生素耐药性表型,包括VISA.
- 了解这些替代性耐药性途径对于对抗难以治疗的感染至关重要.
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