Physiologically Based Pharmacokinetic Modeling of Meropenem in Preterm and Term Infants

Autor: Rachel G. Greenberg, Andrea N. Edginton, Michael Cohen-Wolkowiez, Daniel Gonzalez, Samit Ganguly, Jacqueline G Gerhart
Rok vydání: 2021
Předmět:
Zdroj: Clin Pharmacokinet
ISSN: 1179-1926
0312-5963
DOI: 10.1007/s40262-021-01046-6
Popis: BACKGROUND: Meropenem is a broad-spectrum carbapenem antibiotic approved by the U.S. Food and Drug Administration for use in pediatric patients, including treating complicated intra-abdominal infections (cIAIs) in infants < 3 months of age. The impact of maturation in glomerular filtration rate (GFR) and tubular secretion by renal transporters on meropenem pharmacokinetics, and the effect on meropenem dosing, remains unknown. We applied physiologically based pharmacokinetic (PBPK) modeling to characterize meropenem’s disposition in preterm and term infants. METHODS: An adult meropenem PBPK model was developed in PK-Sim(®) (v. 8) and scaled to infants accounting for renal transporter ontogeny and GFR maturation. The PBPK model was evaluated using 645 plasma concentrations from 181 infants (gestational age 23–40 weeks; postnatal age 1–95 days). PBPK model-based simulations were performed to evaluate meropenem dosing in the product label for infants < 3 months of age treated for cIAIs. RESULTS: Our model predicted plasma concentrations in infants in agreement with the observed data (average fold error of 0.90). The PBPK model-predicted clearance in a virtual infant population was successfully able to capture the post hoc estimated clearance of meropenem in this population, estimated by a previously published model. For 90% of virtual infants, a 4 mg/L target plasma concentration was achieved for > 50% of the dosing interval following product label–recommended dosing. CONCLUSION: Our PBPK model supports the meropenem dosing regimens recommended in the product label for infants < 3 months of age.
Databáze: OpenAIRE
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