对β-乳酸治疗高注射量Enterobacter cloacae复杂感染的分子和药理学见解
Ashlan J Kunz Coyne1, Rachel Gray1, Elizabeth May1
1University of Kentucky College of Pharmacy, Lexington, Kentucky, USA.
Antimicrobial agents and chemotherapy
|September 22, 2025
概括
高排毒的Enterobacter cloacae复合体 (ECC) 感染抵抗标准β-乳酸治疗. 梅罗胺-瓦博巴克坦显示出一致的疗效,而长时间的梅罗胺输液在某些特定情况下显示出益处.
科学领域:
- 微生物学 微生物学
- 药理学 药理学是指药理学的学科.
- 传染性疾病 传染性疾病
背景情况:
- 高排毒的Enterobacter cloacae复合体 (ECC) 感染对β-lactam疗法构成了挑战.
- 通过β-乳酸酶介导的耐药性和注射剂效应放大了耐药性,并恶化了患者的结果.
研究的目的:
- 为了评估各种β-乳酸盐对高-inoculumECC分离物的药理动力学疗效.
- 在模拟内心植被条件下评估杀菌活性,耐药性的出现和β-乳糖酶的表达.
主要方法:
- 使用96小时模拟内心植被 (SEV) 模型与人性化药物暴露.
- 测试了塞费皮姆,梅罗,埃尔塔,梅罗-瓦博巴克坦和塞夫塔齐迪姆-阿维巴克坦与三种高阴性ECC分离物 (109 CFU/g) 相比.
- 评估了细菌杀死,最小抑制度 (MIC) 和β-乳糖酶表达 (例如,AmpC,KPC).
主要成果:
- 塞费皮姆对所有隔离物都失败,显示显著的MIC增加和AMPCβ-乳酸酶 (ACT) 诱导.
- 梅罗尼姆的疗效依赖于输液;长时间输液显示更好地杀死.
- 梅罗烯姆-瓦博巴克坦表现出一致的杀菌活性,具有稳定的MIC和最小的β-乳酸酶诱导.
- 塞法胺-阿维巴克坦显示出可变的疗效,在一种分离物中达到杀菌活性,但在另一种分离物中仅具有细菌静止活性,具有适度的β-乳糖酶上调调.
结论:
- 不同的β-乳酸酶和注射效应在高注射ECC感染中显著限制了β-乳酸的疗效.
- 梅罗-瓦博巴克坦为这些具有挑战性的感染提供了一个有前途的治疗选择.
- 根据特定的β-lactamase机制来定制β-lactam选择对于有效的治疗至关重要.
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