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Cytotoxic cycloartane-type triterpenes from Combretum quadrangulare
A H Banskota1, Y Tezuka, L K Phung
1Research Institute for Wakan-Yaku (Traditional Sino-Japanese Medicines), Toyama Medical and Pharmaceutical University, Japan.
Bioorganic & Medicinal Chemistry Letters
|February 6, 1999
Summary
Seven new cycloartane-type triterpenes from Combretum quadrangulare were identified. Two compounds, methyl quadrangularate B and D, showed potent cytotoxicity against colon cancer cells.
Area of Science:
- Natural Products Chemistry
- Pharmacology
- Medicinal Chemistry
Background:
- Combretum quadrangulare is a plant species with potential medicinal properties.
- Triterpenes are a class of natural compounds with diverse biological activities.
Purpose of the Study:
- To isolate and characterize novel cycloartane-type triterpenes from Combretum quadrangulare.
- To evaluate the cytotoxic activity of these isolated compounds against colon carcinoma cells.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation using spectral analysis (NMR, MS).
- Cytotoxicity assays using murine colon 26-L5 carcinoma cell line.
Main Results:
- Seven novel cycloartane-type triterpenes were successfully isolated and identified.
- Methyl quadrangularate B (2) demonstrated an ED50 of 9.54 microM.
- Methyl quadrangularate D (4) exhibited potent cytotoxicity with an ED50 of 5.42 microM.
Conclusions:
- Combretum quadrangulare is a source of novel bioactive triterpenes.
- Methyl quadrangularate B and D possess significant cytotoxic potential against colon cancer cells, warranting further investigation.