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Related Experiment Videos

[Development of beta-lactamase inhibitors]

A Hyodo1, F Higashitani, K Nishida

  • 1Antimicrobial Research Lab. Taiho Pharmaceutical Co., Ltd.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|May 1, 1997
PubMed
Summary

Beta-lactamase producing bacteria are highly resistant to antibiotics. A new combination of piperacillin (PIPC) with tazobactam (TAZ) effectively combats this resistance, showing superior activity against resistant bacterial strains.

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Area of Science:

  • Microbiology
  • Pharmacology
  • Infectious Diseases

Background:

  • High prevalence of beta-lactamase producing bacteria exceeds 90% in clinical isolates.
  • Significant bacterial resistance observed against ampicillin, piperacillin (PIPC), cefazolin, and cefotiam since 1995.

Purpose of the Study:

  • To develop a beta-lactamase inhibitor and combination antibiotic to overcome existing bacterial resistance.
  • To evaluate the efficacy of tazobactam (TAZ) as a beta-lactamase inhibitor and its combination with piperacillin (TAZ/PIPC).

Main Methods:

  • Development of a novel beta-lactamase inhibitor, tazobactam (TAZ).
  • Assessment of TAZ's inhibitory activity against various beta-lactamases, including cephalosporinases.
  • Evaluation of the antibacterial activity of TAZ/PIPC (1:4 ratio) in vitro and in vivo, including mixed bacterial infection models in mice.

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Main Results:

  • Tazobactam (TAZ) demonstrated strong inhibitory activity against diverse beta-lactamases.
  • The TAZ/PIPC combination exhibited enhanced antibacterial activity compared to PIPC alone against beta-lactamase producing strains.
  • TAZ/PIPC showed superior efficacy in a mouse mixed bacterial infection model and a lower frequency of resistant bacterial emergence than PIPC or ceftazidime (CAZ).

Conclusions:

  • Combined antibiotics with beta-lactamase inhibitors are effective in addressing bacterial resistance.
  • The TAZ/PIPC combination offers a promising strategy to combat beta-lactamase-mediated bacterial resistance.