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Effect of protein binding on the in vitro activity and pharmacodynamics of faropenem

F J Boswell1, J P Ashby, J M Andrews

  • 1Department of Microbiology, City Hospital NHS Trust, Birmingham B18 7QH, UK.

The Journal of Antimicrobial Chemotherapy
|October 3, 2002
PubMed

Insights

Protein binding significantly impacts faropenem

Area of Science:

  • Pharmacology
  • Microbiology
  • Drug Discovery

Background:

  • Protein binding influences drug efficacy.
  • Faropenem is an antibiotic targeting respiratory pathogens.
  • Understanding protein binding is crucial for antibiotic development.

Purpose of the Study:

  • To determine the impact of protein binding on faropenem's in vitro activity.
  • To compare faropenem with amoxicillin regarding protein binding effects.
  • To investigate faropenem's pharmacodynamic properties in serum and albumin.

Main Methods:

  • Ultrafiltration was used to assess faropenem protein binding in human serum and albumin.
  • Minimum Inhibitory Concentrations (MICs) were determined in the presence of serum and albumin.
  • Time-dependent kinetics and inoculum effects were evaluated.

Main Results:

  • Faropenem exhibited high protein binding (95-99%).
  • Increased protein concentrations (serum, albumin) raised faropenem MICs more than amoxicillin's.
  • Faropenem showed time-dependent, concentration-dependent bactericidal activity against S. pneumoniae.

Conclusions:

  • Protein binding significantly affects faropenem's in vitro activity.
  • Faropenem's activity is influenced by serum and albumin concentrations.
  • Further studies are needed to optimize faropenem dosing based on protein binding.

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