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Antitumor septacidin analogues

E M Acton, K J Ryan, A E Luetzow

    Journal of Medicinal Chemistry
    |November 1, 1977
    PubMed
    Summary

    Researchers synthesized septacidin analogues, finding that specific modifications to the aminoheptose moiety and fatty acid side chain retain antitumor activity against leukemia L1210 and P388. These analogues do not bind DNA or mutagenize Salmonella.

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    Area of Science:

    • Medicinal Chemistry
    • Organic Synthesis
    • Pharmacology

    Background:

    • Septicidin is an antitumor antibiotic.
    • Total synthesis provides a route to novel analogues.
    • Understanding structure-activity relationships is crucial for drug development.

    Purpose of the Study:

    • To synthesize novel septacidin analogues via total synthesis.
    • To evaluate the antitumor activity of these analogues against leukemia.
    • To determine the structure-activity relationships of septacidin analogues.

    Main Methods:

    • Total synthesis of septacidin analogues.
    • Modification of the aminoheptose moiety and fatty acid side chain.
    • In vitro evaluation of RNA-DNA synthesis inhibition in leukemia L1210 cells.
    • In vivo evaluation against transplanted leukemia P388 in mice.
    • Assessment of DNA binding and mutagenicity in Salmonella.

    Main Results:

    • Analogues with 4-amino-4-deoxy- and 4-amino-4,6-dideoxy-L-glucose moieties retained activity.
    • Shortening the fatty acid chain to C6 or omitting the glycine unit abolished activity.
    • Activity was maintained with a C12 fatty acid chain or beta-alanine extension.
    • Active and inactive analogues were non-DNA binding and non-mutagenic.

    Conclusions:

    • The aminoheptose moiety and specific fatty acid chain length are critical for septacidin's antitumor activity.
    • Total synthesis is a viable strategy for generating biologically active septacidin analogues.
    • These analogues represent promising candidates for further investigation as non-mutagenic antitumor agents.

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