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Imipenem pharmacokinetics/pharmacodynamics in preclinical hollow fiber model, dose-finding in virtual patients, and clinical evidence of efficacy for Mycobacterium abscessus lung disease
The Journal of Infectious Diseases ( IF 5.0 ) Pub Date : 2024-12-17 , DOI: 10.1093/infdis/jiae601
Sanjay Singh, Tawanda Gumbo, Jann-Yuan Wang, Gunavanthi D Boorgula, Andrew Burke, Hung-Ling Huang, Pamela J McShane, Rodolfo Amaro-Galvez, Jane E Gross, Santosh Aryal, Scott K Heysell, Shashikant Srivastava

Background Guideline-based therapy (GBT) for Mycobacterium abscessus (Mab) lung disease achieves sputum culture conversion rates (SCC) of 35%. This poor GBT efficacy is mirrored in the hollow fiber system model of Mab (HFS-Mab). While imipenem is part of GBT, biological effect with or without β-lactamase inhibitors, is unproven. Methods We performed imipenem/relebactam minimum inhibitory concentration (MIC) in 122 Mab isolates, and an exposure-response study in the HFS-Mab using human intrapulmonary pharmacokinetics. The % time that concentration persisted above MIC (TMIC) mediating maximal effect in the HFS-Mab was used as the exposure target in 10,000 virtual subjects Monte Carlo experiment (MCE)-based dose-finding. For real-world evidence, we performed a patient, intervention (imipenem), comparison (no β-lactam), and outcome (SCC) (PICO) analysis. Results Imipenem killed 1.32 log10 CFU/mL below day 0 in HFS-Mab. Imipenem target exposure was TMIC=47.9±9.77%. 1g infusion, every 6h, achieved the target in >90% of virtual patients in MCEs. The pharmacokinetics/pharmacodynamics MIC breakpoint was 1mg/L. In PICO analyses, median days-to-SCC were 470 in comparators, 311 for imipenem added on failing regimen, and 37 in newly treated (p=0.049). The odds ratio for SCC when imipenem was part of the initial regimen versus comparators was 12.5 (95% confidence interval: 1.47 to 84.55). Patients on imipenem experienced no treatment-limiting adverse event, while 2/7 comparators did (p=0.0457). Middlebrook 7H9 broth MIC distribution, read at 24 hours, correlated better with patient responses than cation-adjusted Mueller Hinton broth. Conclusion Imipenem demonstrated biologic effect in the HFS-Mab and in patients. Imipenem/relebactam doses of 1g every 6h are recommended.

中文翻译:


亚胺培南临床前中空纤维模型中的药代动力学/药效学、虚拟患者的剂量探索以及脓肿分枝杆菌肺病疗效的临床证据



背景 脓肿分枝杆菌 (Mab) 肺病的基于指南的治疗 (GBT) 实现了 35% 的痰培养转化率 (SCC)。这种较差的 GBT 功效反映在 Mab 的中空纤维系统模型 (HFS-Mab) 中。虽然亚胺培南是 GBT 的一部分,但有或没有 β-内酰胺酶抑制剂的生物学效应尚未得到证实。方法 我们在 122 个 mAb 分离株中进行了亚胺培南/relebactam 最低抑菌浓度 (MIC),并使用人肺内药代动力学在 HFS-mAb 中进行了暴露反应研究。在 10,000 名虚拟受试者基于蒙特卡洛实验 (MCE) 的剂量发现中,浓度持续高于 MIC (TMIC) 介导的最大效应的时间百分比用作暴露目标。对于真实世界证据,我们进行了患者、干预 (亚胺培南) 、比较 (无 β-内酰胺类) 和结局 (SCC) (PICO) 分析。结果 亚胺培南在 HFS-mAb 中比第 0 天低 1.32 log10 CFU/mL 被杀死。亚胺培南靶点暴露量为 TMIC=47.9±9.77%。每 6 小时输注 1 克,在 MCE 中 >90% 的虚拟患者中达到目标。药代动力学/药效学 MIC 断点为 1 mg/L。在 PICO 分析中,对照组的中位 SCC 天数为 470 天,失败方案中加入亚胺培南为 311 天,新治疗者为 37 天 (p=0.049)。当亚胺培南作为初始方案的一部分与对照组相比,SCC 的比值比为 12.5 (95% 置信区间: 1.47 至 84.55)。使用亚胺培南的患者没有出现限制治疗的不良事件,而 2/7 的对照组则发生了 (p=0.0457)。Middlebrook 7H9 肉汤 MIC 分布,在 24 小时时读取,与阳离子调整的 Mueller Hinton 肉汤相比,与患者反应的相关性更好。结论 亚胺培南在 HFS-Mab 和患者中显示出生物学效应。建议每 6 小时服用 1 克亚胺培南/雷巴坦剂量。
更新日期:2024-12-17
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