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Bioactive compounds from Combretum erythrophyllum.

S Schwikkard1, B N Zhou, T E Glass

  • 1Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0212, USA.

Journal of Natural Products
|April 29, 2000
PubMed
Summary
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A methanol extract from Combretum erythrophyllum demonstrated DNA-damaging agent inhibitory activity. Further analysis isolated two new bioactive glucosides, combretastatin A-1 2'-beta-D-glucoside and combretastatin B-1 2'-beta-D-glucoside.

Area of Science:

  • Phytochemistry
  • Natural Products Chemistry
  • Molecular Biology

Background:

  • Combretum erythrophyllum is a plant species known for potential medicinal properties.
  • DNA-damaging agents are crucial in various biological and medical research areas.
  • Assays for DNA-damaging agents are vital for drug discovery and toxicological studies.

Purpose of the Study:

  • To investigate the bioactivities of Combretum erythrophyllum extracts.
  • To isolate and characterize bioactive compounds from the plant.
  • To identify novel glucosides with potential inhibitory effects.

Main Methods:

  • Methanol extraction of Combretum erythrophyllum.
  • Yeast-based microtiter assay for DNA-damaging agents.
  • Bioassay-guided fractionation.

Related Experiment Videos

  • Nuclear Magnetic Resonance (NMR) spectroscopy (1H, 13C, DEPT, HMQC, HMBC) for structural elucidation.

    • Main Results:

    • The methanol extract exhibited inhibitory activity against DNA-damaging agents.
    • Two known compounds, combretastatin A-1 and (-)-combretastatin, were identified.
    • Two new bioactive glucosides, combretastatin A-1 2eta-D-glucoside (1) and combretastatin B-1 2eta-D-glucoside (2), were isolated and characterized.

    Conclusions:

    • Combretum erythrophyllum is a source of bioactive compounds with inhibitory activity.
    • The newly identified glucosides represent novel chemical entities with potential applications.
    • Structural elucidation confirmed the identity and novelty of the isolated compounds.