Lung Collapse during Mini-Thoracotomy Reduces Penetration of Cefuroxime to the Tissue: Interstitial Microdialysis Study in Animal Models

Děrgel, Martin; Vobornik, Martin; Pojar, Marek; Karalko, Mikita; Gofus, Ján; Radochová, Věra; Studená, Šárka; Maláková, Jana; Turek, Z.; Chládek, Jaroslav; Mandak, Jiri

doi:10.1089/sur.2019.273

Cited by 2 publications

(1 citation statement)

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“…Therefore, the U.S. Food and Drug Administration (FDA) advocates for monitoring free drug concentrations at the site of infection to ensure adequate levels, thereby preventing treatment failure and resistance development ( 7 ). However, for infections occurring in deep-seated tissues or organs such as the lungs, brain, and kidney, detecting drug concentrations therein still presents certain difficulties ( 8 ).…”

Section: Introductionmentioning

confidence: 99%

Lung microdialysis and in vivo PK/PD integration of cefquinome against Actinobacillus pleuropneumoniae in a porcine experimental lung infection model

Chen,

Li,

et al. 2024

Front. Vet. Sci.

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This study aim to explore the application of microdialysis in pharmacokinetic (PK) and pharmacodynamic (PD) integration of cefquinome against Actinobacillus pleuropneumoniae in a porcine experimental lung infection model. The model was established via intratracheal inoculation where average bacterial counts (CFU) in the lungs of infected pigs reached 6.57 log10 CFU/g after 3 h. The PK profiles of unbound cefquinome in lung dialysates were determined following intramuscular injection of single doses of 0.125, 0.25, 0.5, 1, 2, and 4 mg/kg. Lung dialysate samples were collected using microdialysis at a flow rate of 1.5 μL/min until 24 h. The PD studies were conducted over 24 h based on 10 intermittent dosing regimens and total daily doses ranged from 0.25 to 4 mg/kg and dosage intervals included 12 and 24 h. The lung tissue was collected after 24 h of treatment and homogenized for bacterial counts. The relationships between PK/PD parameters derived from lung dialysates and drug efficacy were analyzed using an inhibitory sigmoid Emax model. The percentage of time the free drug concentration exceeded the minimum inhibitory concentration (%fT > MIC) was the PK/PD index best describing the antimicrobial activity (R2 = 0.96) in the porcine experimental infection model. The %fT > MIC values required to achieve net bacterial stasis, 1, 2 and 3 log10 CFU/g reductions in the lung were 22.45, 28.86, 37.62, and 56.46%, respectively. Cefquinome exhibited time-dependent characteristics against A. pleuropneumoniae in vivo. These results provide valuable insights into the application of microdialysis in PK/PD integration model studies and optima regimen of cefquinome for the treatment of porcine respiratory diseases caused by A. pleuropneumoniae.

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Section: Introductionmentioning

confidence: 99%