基诺林衍生物的抗菌活性对抗抗甲素耐药的黄金葡萄球菌和 Pseudomonas aeruginosa:设计,合成, DFT 和分子动力学模拟
Ahmed Sabt1, Mohamed Abdelraof2, Mohamed Farouk Hamissa3
1Chemistry of Natural Compounds Department, Pharmaceutical and Drug Industries Research Institute, National Research Center, Dokki, Cairo, 12622, Egypt.
Chemistry & biodiversity
|November 7, 2023
概括
新的素化合物显示出强大的抗微生物活性,可以对抗具有挑战性的细菌菌株,如甲素耐药性黄金葡萄球菌 (MRSA) 和伪菌 (PA). 这些新型化合物为对抗多药耐药性 (MDR) 感染提供了有希望的策略.
科学领域:
- 药用化学 医学化学
- 发现抗微生物药物 发现抗微生物药物
- 计算化学的计算化学
背景情况:
- 细菌的毒性,特别是来自多抗药 (MDR) 菌株的毒性,构成了重大的临床挑战.
- 新型抗菌剂的开发对于有效治疗耐药细菌感染至关重要.
- 奎诺林衍生物是设计新抗菌化合物的有希望的支架.
研究的目的:
- 综合和评估新型素化合物的抗菌活性,以对抗抗甲素耐药的黄金葡萄球菌 (MRSA) 和伪菌 (PA).
- 确定针对这些具有挑战性的病原体具有高疗效的特定氨酸衍生物.
- 使用计算方法阐明最活跃化合物的作用机制和结合亲和力.
主要方法:
- 新型氨酸衍生物的合成.
- 抗微生物敏感性测试以确定对MRSA和PA的最小抑制度 (MIC) 值.
- 分子建模,包括对接,分子动力学模拟,MM-PBSA和DFT计算,以调查机制和特性.
主要成果:
- 化合物8和12对Pseudomonas Aeruginosa (MIC分别为5±2.2和10±1.5微克/毫升),但对MRSA没有强烈的活性.
- 化合物13 (indole部分) 和16c显示出对MRSA和Pseudomonas Aeruginosa的显著抑制.
- 化合物13显示出优异的杀菌活性,MIC值较低 (MRSA为20±3.3μg/mL,PA为10±1.5μg/mL).
- 分子建模提供了对作用方式,复杂稳定性,结合亲和力和电化学性质的见解.
结论:
- 新型氨酸衍生物,特别是13和16c化合物,显示出作为抗菌剂对抗MRSA和PA的显著潜力.
- 化合物13,含有醇部分,是对这些耐药细菌菌株进行进一步开发的非常有前途的候选物.
- 计算研究支持实验结果,并为进一步优化这些素基抗菌剂提供了基础.
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