一种高通量测定能识别出具有抗微生物活性的分子对抗持续性细胞的作用
Maiken Engelbrecht Petersen1, Liva Kjær Hansen1, Alexander Alexandrovich Mitkin1
1Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, 8000 Aarhus C, Denmark.
Journal of medical microbiology
|July 12, 2024
概括
研究人员开发了一种简单的测试方法,以找到针对持久细胞的新抗生素,这些细胞是导致感染复发的不生长细菌. 他们确定了7种对这些有弹性的细菌有活性的化合物,为新型抗菌疗法铺平了道路.
科学领域:
- 微生物学与传染病的研究
- 药物发现和开发 药物发现和开发
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 持久性细胞是休眠的,不生长的细菌,可以耐受抗生素,导致持久性感染和治疗失败.
- 现有的高通量药物发现试验主要确定增长抑制剂,忽略了对不生长的持续细胞有效的化合物.
- 对于能够识别专门向并消除持久性细菌的抗微生物剂的新型测试存在关键需求.
研究的目的:
- 开发一种简单的,高通量测定方法,用于识别具有抗菌活性的化合物,用于对抗 * Staphylococcus aureus * 持久细胞.
- 查具有强烈活性对抗抗生素耐受性持久性细菌的分子动机.
- 建立一种可靠的方法,用于发现抗逆性感染有效的新型生物杀菌抗生素.
主要方法:
- 在用西普洛素治疗后,使用殖民地形成单元计数量测定 * Staphylococcus aureus * 持续细胞的量化.
- 优化参数,包括细胞度,抗生素度,生长阶段和持续细胞生成的营养素可用性.
- 使用无碳的最小中等饥饿协议对抗持久细胞的抗菌活性选化合物碎片.
主要成果:
- 一个涉及在无碳最小介质中饥饿的协议有效地产生了高度的*S. aureus*持久细胞,耐受50×MIC西普洛辛.
- 来自四个不同的结构集群的七种化合物表现出对抗生素耐受性黄金色杆菌*的活性.
- 两种已识别的化合物表现出中度细胞毒性,而剩余的化合物表现出高细胞毒性,需要进一步优化.
结论:
- 将静态相培养物转移到无碳最小介质是对持久杀细胞抗生素高通量查的简单有效策略.
- 这项研究成功地确定了具有针对持久细胞活性的分子碎片.
- 需要进一步的研究来确定具有强大的抗微生物活性和降低一般细胞毒性的药物动机.
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