serval:BIB_8719F51B8911
<i>In vitro</i> study of new combinations for local antibiotic therapy with calcium sulphate - Near constant release of ceftriaxone offers new treatment options.
10.7150/jbji.26218
30416946
Wahl
P.
author
Rönn
K.
author
Bohner
M.
author
Decosterd
L.A.
author
Meier
C.
author
Schläppi
M.
author
Festa
S.
author
Gautier
E.
author
article
2018
Journal of bone and joint infection
2206-3552
2206-3552
journal
3
4
212-221
Local application of antibiotics provides high concentrations at the site of interest, with minimal systemic toxicity. Carrier materials might help manage dead space. Calcium sulphate (CaSO <sub>4</sub> ) has a dissolution time that only slightly exceeds the usually recommended duration of systemic antibiotic treatments. This <i>in vitro</i> study evaluates compatibility, release kinetics and antibacterial activity of new combinations of antibiotics with CaSO <sub>4</sub> as carrier material.
CaSO <sub>4</sub> pellets added with 8% w/w antibiotic powder were exposed once in phosphate-buffered saline (PBS) solution and once in bovine plasma, in an elution experiment run over 6 weeks at 37 °C. Antibiotic elution was examined at various time points. Concentration was measured by liquid chromatography with tandem mass spectrometry. Antimicrobial activity was checked with an agar diffusion test.
Piperacillin-tazobactam, ceftazidime, cefepime, and meropenem showed fast reduction of concentration and activity. Flucloxacillin and cefuroxime remained present in relevant concentrations for 4 weeks. Ciprofloxacin, levofloxacin and clindamycin lasted for 6 weeks, but also at cell toxic concentrations. Ceftriaxone showed a near-constant release with only a small reduction of concentration from 130 to 75 mg/l. Elution profiles from PBS and plasma were comparable.
CaSO <sub>4</sub> provides new possibilities in the local treatment of bone and joint infections. Ceftriaxone appears to be of particular interest in combination with CaSO <sub>4</sub> . Release persists at clinically promising concentrations, and appears to have a depot-like slow release from CaSO <sub>4</sub> , with only a small reduction in activity and concentration over 6 weeks. To the best of our knowledge, such a particular persistent release never was described before, for any antibiotic in combination with a carrier material for local application.
CaSO4
Calcium sulphate
antibiotics
ceftriaxone
in vitro elution
eng
60_published
true
peer-reviewed
Publication types: Journal Article
Publication Status: epublish
University of Lausanne
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