黄金葡萄球菌对康普莱斯塔丁和菌素的敏感性取决于VraSR的两组系统
Carmen Gómez-Arrebola1, Sara B Hernandez2, Elizabeth J Culp3
1Laboratory of Microbial Pathogenesis, Navarrabiomed, Hospital Universitario de Navarra (HUN), Universidad Pública de Navarra (UPNA), IdiSNA , Pamplona, Spain.
Microbiology spectrum
|August 30, 2023
概括
研究人员确定VraSR是唯一一个调节金黄色葡萄球菌对新型抗生素complestatin和corbomycin敏感性的两组系统. 调节VraSR和相关的细胞壁合成基因会影响细菌的耐药性.
科学领域:
- 微生物学和分子生物学
- 抗生素耐药性机制 抗生素耐药性机制
- 细菌细胞壁的合成 细菌细胞壁的合成
背景情况:
- 抗微生物耐药性的上升需要发现新型抗生素,如康普莱斯塔丁 (Cm) 和科尔博米辛 (Cb).
- 这些糖酸向丁糖,抑制细胞壁重塑,对抗耐药菌株表现出活性.
- 细菌的双组分系统 (TCS) 涉及黄金葡萄球菌的抗生素耐药性,但它们在Cm和Cb易感性中的作用尚不清楚.
研究的目的:
- 调查黄金葡萄球菌TCSs在对新型抗生素complestatin和corbomycin敏感性的作用.
- 阐明涉及调节细菌对Cm和Cb的反应的特定TCS.
- 了解TCS,细胞壁合成和对这些新型抗生素的耐药性之间的相互作用.
主要方法:
- 对所有16种黄金葡萄球菌TCS进行系统查,以确定它们在Cm和Cb敏感性中的作用.
- 基因操纵,包括删除突变 (例如,ΔvraSR, ΔspdC, ΔsagB),以评估抗生素敏感性.
- 表观性分析和类甘油分析以确定功能关系和细胞壁变化.
主要成果:
- 确定VraSR是唯一一个控制对Cm和Cb敏感性的TCS.
- 删除vraSR显著增加了金黄色葡萄球菌对Cm和Cb的敏感性.
- 细胞壁合成基因 (spdC,sagB) 在VraSR regulon调节的敏感性内的修饰, ΔspdC 和 ΔsagB 突变因变化的甘结构而表现出增加的耐药性.
结论:
- 弗拉SR TCS 是黄金葡萄球菌对新型糖抗生素Cm和Cb的敏感性的关键调节者.
- 细胞壁重塑途径,特别是涉及SpdC和SagB的途径,对于调解对这些抗生素的耐药性至关重要.
- 了解这些调节机制,可以了解抗生素耐药性的防治和开发新的治疗策略.
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