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Published on: November 5, 2014

Amino acid analogs IV:4-fluoroisoleucine

H Gershon, L Shanks, D D Clarke

    Journal of Pharmaceutical Sciences
    |May 1, 1978
    PubMed

    Insights

    4-Fluoroisoleucine, a novel fluoroamino acid, demonstrated antifungal activity against several fungal species but showed no efficacy against Plasmodium berghei in mice. This compound was well-tolerated in animal models, indicating potential for further investigation.

    Area of Science:

    • Biochemistry
    • Organic Chemistry
    • Medicinal Chemistry

    Background:

    • Fluorinated amino acids are recognized for their diverse biological activities.
    • Investigating novel amino acid derivatives is crucial for discovering new therapeutic agents.

    Purpose of the Study:

    • To synthesize and evaluate the biological activity of 4-Fluoroisoleucine.
    • To assess the antifungal and antimalarial potential of 4-Fluoroisoleucine.
    • To determine the toxicity profile of 4-Fluoroisoleucine in vivo.

    Main Methods:

    • Synthesis of 4-Fluoroisoleucine via ammonolysis of a bromofluorinated precursor.
    • Antifungal screening against Aspergillus niger, Trichoderma viride, Myrothecium verrucaria, Trichophyton mentagrophytes, and Mucor mucedo.
    • In vivo antimalarial assay using Plasmodium berghei in mice.
    • Bacterial growth inhibition assay with Escherichia coli.

    Main Results:

    • 4-Fluoroisoleucine exhibited antifungal activity against a range of fungi at concentrations between 10^3 and 10^4 µg/ml.
    • No significant inhibition of Plasmodium berghei was observed at 640 mg/kg.
    • No toxicity was noted in mice at the tested dosage.
    • 25% inhibition of Escherichia coli growth was observed at 900 µg/ml.

    Conclusions:

    • 4-Fluoroisoleucine possesses notable antifungal properties.
    • The compound lacks antimalarial activity and demonstrates a favorable safety profile in mice.
    • Further research into 4-Fluoroisoleucine's antifungal mechanisms and potential applications is warranted.

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