黄金葡萄球菌的表面附着选择性地影响了对充电抗生素的耐受性
Andrew Hayles1, Richard Bright1, Ngoc Huu Nguyen2
1College of Medicine and Public Health, Flinders University, Bedford Park, South Australia, 5042 Australia.
Acta biomaterialia
|December 23, 2023
概括
黄金葡萄球菌在与结合时改变其细胞表面电荷,增加对万科米辛的耐受性,但不增加对zolin的耐受性. 这一发现有助于在植入体手术中选择抗生素,并提出了预防感染的新目标.
科学领域:
- 微生物学 微生物学
- 生物材料科学 生物材料科学
- 传染性疾病 传染性疾病
背景情况:
- 手术部位感染在植入物放置期间是一个重要的风险.
- 预防性抗生素可以促进细菌耐药性和持续性感染.
- 了解细菌对表面的早期适应是改善预防的关键.
研究的目的:
- 研究Staphylococcus aureus适应医学级表面的分子机制.
- 确定这些适应如何影响早期附着期间的抗生素耐受性.
- 在植入物外科手术中确定新型抗感染策略的潜在目标.
主要方法:
- 基因表达分析以确定S. aureus.中高调的细胞系统.
- 同步源减弱总反射里埃变换红外显微光谱学用于分析细胞表面的生物分子特性.
- 在表面附着后评估S. aureus对万科米辛和塞法索林的耐受性.
主要成果:
- 黄金S. upregulates系统d-alanylation的铁酸和lysylation的酸糖醇在附着. 这种系统是为了提高系统的稳定性.
- 这些修改改变了细胞表面的电荷,增加了对正电荷的耐受性. vancomycin.
- 对于负电荷抗生素cefazolin,没有观察到耐受性的显著变化.
结论:
- 黄金菌采用特定的生理适应来增强在早期表面殖民期间的抗生素耐受性.
- 观察到的细胞表面电荷的变化是增加万科米辛耐受性的关键.
- 结果可以指导合理的抗生素选择用于预防,并建议新的抗感染疗法的目标.
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