达成β-乳酸的目标对抗药性发展的影响,在患有格兰阴性感染的患者中
Nicole F Maranchick1,2, Jessica Webber3, Mohammad H Alshaer1,2
1Infectious Disease Pharmacokinetics Lab, Department of Pharmacotherapy and Translational Research, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA.
Antibiotics (Basel, Switzerland)
|December 23, 2023
概括
在度-时间曲线下达到494或更高的最小抑制度 (ƒAUC/MIC) 的自由区域可能有助于减少格拉姆阴性细菌耐药性的出现. 这一发现对于优化抗生素治疗和打击抗菌素耐药性至关重要.
科学领域:
- 药理学和微生物学 药理学和微生物学
- 传染性疾病 传染性疾病
- 临床药房 临床药房
背景情况:
- 格拉姆阴性细菌的抗微生物耐药性是一个日益严重的全球健康问题.
- 了解抗生素剂量与耐药性之间的关系对于有效治疗至关重要.
- 贝塔乳酸抗生素被广泛使用,但它们的有效性可能会因新出现的耐药性而受到损害.
研究的目的:
- 调查β-乳糖抗生素的药理动力学/药理动力学 (PK/PD) 目标与格拉姆阴性细菌中耐药性的出现之间的关联.
- 为了确定特定的PK/PD参数,可以预测或防止耐药性的发展.
- 在临床实践中为beta-lactam药物的最佳剂量策略提供信息.
主要方法:
- 对接受塞费皮姆,梅罗尼姆或皮佩拉林-塔扎巴克坦的成年患者进行了回顾性分析.
- 测量了血β-乳酸度,以计算PK/PD目标,包括低于最小抑制度的空时间 (ƒT>MIC) 和MIC曲线下的空面积 (ƒAUC/MIC).
- 抵抗的出现被定义为最小抑制度 (MIC) 的增加或MIC的两倍增加,并使用多重回归分析来评估PK/PD参数的影响.
主要成果:
- 这项研究包括256名患者,其中628名患者有格拉姆阴性分离物,其中最常见的是cefepime和* Pseudomonas aeruginosa*.
- 平均每日 ƒAUC/MIC ≥494 与MIC的任何增加 (p=0.002) 和MIC的两倍增加 (p=0.004) 有意义地相关.
- *Pseudomonas aeruginosa*分离体显示出抗药性出现的可能性更高 (OR:6.41-7.08).
结论:
- 一个 ƒAUC/MIC 目标值为 494 或更高可能与格拉姆阴性细菌耐药性出现的减少有关.
- 根据fAUC/MIC优化β-乳酸暴露可能是缓解抗菌素耐药性的关键策略.
- 需要进一步的前性研究来证实这些发现并指导临床剂量.
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