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Related Experiment Videos

Studies on orally active cephalosporin esters.

K Fujimoto, S Ishihara, H Yanagisawa

    The Journal of Antibiotics
    |March 1, 1987
    PubMed
    Summary

    New cephalosporin esters show potent antibacterial activity and good oral absorption. The prodrug ester CS-807 is a promising candidate for oral therapy against bacterial infections.

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    Area of Science:

    • Medicinal Chemistry
    • Microbiology
    • Pharmacology

    Background:

    • Cephalosporins are a vital class of beta-lactam antibiotics used to treat bacterial infections.
    • Developing orally active cephalosporins remains a significant challenge due to poor bioavailability.
    • Prodrug strategies can enhance the absorption and efficacy of antimicrobial agents.

    Purpose of the Study:

    • To synthesize novel orally active cephalosporin esters.
    • To evaluate the antibacterial activity and pharmacokinetic properties of these compounds.
    • To identify promising candidates for oral cephalosporin therapy.

    Main Methods:

    • Synthesis of 3-methoxymethyl cephem derivatives with a specific C-7 side chain.
    • In vitro antibacterial susceptibility testing against diverse bacterial strains, including beta-lactamase producers.

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  • Oral administration to mice to assess urinary recovery and pharmacokinetic profiles of prodrug esters.

    • Main Results:

    • Cephem derivatives (1) demonstrated broad-spectrum antibacterial activity.
    • Activity was maintained against several beta-lactamase producing bacterial species.
    • Prodrug esters showed good urinary recovery after oral administration, with CS-807 (2a) being highlighted.

    Conclusions:

    • The synthesized cephalosporin esters possess significant antibacterial potential.
    • The prodrug approach effectively improves oral bioavailability and urinary recovery.
    • CS-807 is a promising orally active cephem prodrug candidate for further clinical development.