Comparison of ultrafiltration and microdialysis for ceftriaxone protein-binding determination
| العنوان: | Comparison of ultrafiltration and microdialysis for ceftriaxone protein-binding determination |
|---|---|
| المؤلفون: | Maria Sanz-Codina, Sebastian G Wicha, Beatrix Wulkersdorfer, Valentin Al Jalali, Wisse Van Os, Matthias G Vossen, Martin Bauer, Edith Lackner, Christoph Dorn, Markus Zeitlinger |
| المصدر: | Journal of Antimicrobial Chemotherapy |
| بيانات النشر: | Oxford University Press (OUP), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Pharmacology, Microbiology (medical), Infectious Diseases, Pharmacology (medical) |
| الوصف: | Background High protein binding (PB) of antibiotics has an impact on their antimicrobial activity. It has been questioned whether in vitro PB determination can capture the dynamic and concentration-dependent PB of highly bound antibiotics. Objectives This clinical study compared in vitro ultrafiltration (UF) and in vivo IV microdialysis (MD) methods to determine ceftriaxone PB. Methods Six healthy male volunteers received a single IV 2 g dose of ceftriaxone. Unbound ceftriaxone plasma concentrations were measured with MD and venous plasma sampling with subsequent UF. Pharmacokinetic parameters were determined using non-compartmental pharmacokinetic analysis. Non-linear mixed-effects modelling was used to quantify the PB. The PTA was estimated. Results The Cmax of ceftriaxone total plasma concentration (297.42 ± 21.0 mg/L) was approximately 5.5-fold higher than for free concentrations obtained with UF (52.83 ± 5.07 mg/L), and only 3.5-fold higher than for free concentrations obtained with MD (81.37 ± 26.93 mg/L). Non-linear, saturable PB binding was confirmed for both UF and MD. Significantly different dissociation constants (Kd) for the albumin/ceftriaxone complex were quantified: in UF it was 23.7 mg/L (95% CI 21.3–26.2) versus 15.9 mg/L (95% CI 13.6–18.6) in MD. Moreover, the estimated number of binding sites (95% CI) per albumin molecule was 0.916 (0.86–0.97) in UF versus 0.548 in MD (0.51–0.59). The PTA obtained with MD was at most 27% higher than with UF. Conclusions In vitro UF versus in vivo intravasal MD revealed significantly different PB, especially during the distribution phase. The method of PB determination could have an impact on the breakpoint determination and dose optimisation of antibiotics. |
| تدمد: | 1460-2091 0305-7453 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c94d792e6a089e63c5bec3b9d792163a https://doi.org/10.1093/jac/dkac400 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....c94d792e6a089e63c5bec3b9d792163a |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14602091 03057453 |
|---|