进化阿普拉素耐药MRSA中对β-乳酸胺抗生素的附带敏感性
Jingjing Wu1,2, Shiqian Wu1,2, Juan Liu1,2,3
1State Key Laboratory for Animal Disease Control and Prevention, South China Agricultural University, Guangzhou 510642, China.
International journal of molecular sciences
|November 27, 2024
概括
甲素耐药金黄色葡萄球菌 (MRSA) 发展出抗阿普拉素耐药性,意外增加了对多种β-乳酸抗生素的敏感性. 这种附带敏感性为针对MRSA感染提供了新的治疗策略.
科学领域:
- 微生物学 微生物学
- 细菌的耐药性 细菌的耐药性
- 发现了抗生素的发现
背景情况:
- 附带敏感性是一种现象,一种抗生素的耐药性会导致对另一种抗生素的敏感性.
- 甲素耐药黄金葡萄球菌 (MRSA) 是一个重要的公共卫生问题,因为它对常见抗生素的耐药性.
研究的目的:
- 为了研究MRSA对beta-lactam抗生素的附带敏感性,在对apramycin产生耐药性后.
- 了解这种诱导的抵押品敏感性的潜在机制.
主要方法:
- MRSA菌株暴露于不断增加的阿普拉米辛度以诱导耐药性.
- 由此产生的耐药菌株对一组β-乳糖抗生素的敏感性进行了测试.
- 分析了包括β-乳糖酶活性和mecA基因表达在内的关键分子标记物.
- 评估了细胞功能,如质子动力和流量活动.
主要成果:
- 在MRSA中获得阿普拉素耐药性导致对多种beta-lactam抗生素 (安培素,素, ceftriaxone, cefotaxime, cefepime, cefquinome) 的附带敏感性.
- 这种敏感性与β-lactamase活性降低和mecA基因表达率降低相关.
- 还观察到质子驱动力的减少和流出活动的减少.
结论:
- 在MRSA中诱导的阿普拉素耐药性导致对β-乳酸抗生素的附带敏感性.
- 观察到的附带敏感性与降低β-乳糖酶活性,降低mecA表达,减少质子动力和减少排泄有关.
- 这些发现凸显了附带敏感性的潜力,作为对抗MRSA的治疗策略.
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