复合氨基酸协同 ceftazidime-avibactam 消除细胞外和细胞内MDR病原体
Jiao Xiang1, Yu-Qing Zhou2, Si-Chen Yuan1
1State Key Laboratory of Biocontrol, Guangdong Key Laboratory of Pharmaceutical Functional Genes, School of Life Sciences, the Third Affiliated Hospital of Sun Yat-sen University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510275, People's Republic of China.
Cell reports
|February 20, 2026
概括
氨基酸配方18AA增强了对抗药物耐药细菌的抗生素疗效. 这种组合疗法在治疗具有挑战性的多药耐药性和卡巴胺耐药性感染方面表现有前途.
科学领域:
- 微生物学 微生物学
- 药理学 药理学 是一个学科.
- 传染性疾病 传染性疾病
背景情况:
- 抗生素耐药性是一个日益严重的全球健康危机.
- 迫切需要提高现有的抗生素的有效性.
研究的目的:
- 为了研究一个18氨基酸配方 (18AA) 与ceftazidime-avibactam (CZA) 的协同效应.
- 评估CZA+18AA组合对多药耐药 (MDR) 和碳烯耐药 (CR) 病原体的疗效.
主要方法:
- 对10种MDR/CR细菌的临床分离体进行了CZA+18AA组合的测试,包括大肠杆菌和Edwardsiella tarda.
- 在动物感染模型中验证的疗效.
- 研究了协同作用的潜在分子机制.
主要成果:
- 这种CZA+18AA组合显示出协同效果,消除了CR-ECO和MDR E. tarda.
- 在所有测试的临床隔离物中观察到协同作用,并在体内得到验证.
- 从机制上讲,18AA通过促进因诺辛生物合成和激活CusS/CusR-CusC通路来增强抗生素的流入.
结论:
- 像18AA这样的营养辅助剂可以加强现有的抗生素对抗难治的MDR/CR感染.
- 有针对性的代谢调节提供了一种临床可转化策略,以对抗抗生素耐药性.
- 该研究确定了因诺辛激活的抗生素敏感突变体中的新型耐药性机制.
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