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The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
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生物膜:是万科胺中间体黄金葡萄球菌的发展利基.

Jenelle E Chapman1, Shilpa E George2, Christiane Wolz2

  • 1Department of Medical Microbiology, Immunology, and Cell Biology, Southern Illinois University School of Medicine, USA.

Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases
|December 31, 2023
PubMed
概括

黄金葡萄球菌生物膜通过ReCA/SOS反应促进了万科米辛的中间耐药性. 生物膜中的这种适应,与浮游生物培养不同,增强了对抗生素的细菌生存能力.

关键词:
生物膜是一种生物膜.修复DNA的修复DNA的修复保险假设是一种保险假设.黄金葡萄球菌黄金葡萄球菌范科米辛是一种药物.

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科学领域:

  • 微生物学 微生物学
  • 抗生素耐药性 抗生素耐药性
  • 细菌病原体的产生

背景情况:

  • 黄金葡萄球菌会引起各种感染,MRSA菌株通常用菌素治疗.
  • 新出现的万科米中间体黄金菌 (VISA) 和万科米抗性黄金菌 (VRSA) 威胁着万科米的疗效.
  • VISA与细胞壁合成基因 (例如,rpoB,graS,yycG) 的突变有关.

研究的目的:

  • 为了调查S. aureus中是否会因生物膜中的压力而产生对万科米辛的中间耐药性.
  • 为了确定ReCA/SOS反应是否调解S. aureus生物膜中的VISA发育.

主要方法:

  • 黄金色菌生物膜和浮游生物培养暴露于低抑制度的万科米辛.
  • 使用了野生型,recA无突变和lexA突变菌株.
  • 涂层的效率量化了对万科素中间体耐药的亚群.

主要成果:

  • 野生类型的生物膜比浮游生物培养 (1.53 × 10 ^ 1 CFU) 显示出显著更高的万科米辛中间耐药性 (4.16 × 10 ^ 2 CFU).
  • 与recA无突变菌株 (8.15 × 10^1 CFU) 和lexA突变菌株 (8.00 × 10^1 CFU) 相比,生物膜表现出更大的耐药性.
  • 该ReCA/SOS通路似乎对于调解这种阻力至关重要.

结论:

  • 生物膜环境有助于S. aureus中万科素中间耐药性的出现.
  • RecA/SOS反应在S. aureus适应生物膜中的万科米辛压力的过程中起着关键作用.
  • 这种适应机制凸显了生物膜如何促进抗生素耐药性和细菌生存.