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Two new xanthone epimers from the processed gamboge.
Bang Dong1, Yun-Feng Zheng1, Hong-Mei Wen1
1a School of Pharmacy , Nanjing University of Chinese Medicine , China.
Natural Product Research
|November 5, 2016
Summary
Two new xanthones isolated from gamboge, gambogollic acid and epigambogollic acid, demonstrated significant antitumor activity against cancer cells. All five evaluated compounds showed inhibitory effects on human hepatoma and lung adenocarcinoma cell lines.
Area of Science:
- Natural Products Chemistry
- Pharmacology
- Medicinal Chemistry
Background:
- Gamboge, a traditional medicine, contains various bioactive compounds.
- Xanthones are a class of compounds known for their diverse biological activities.
- Understanding the chemical constituents and therapeutic potential of gamboge is crucial.
Purpose of the Study:
- To isolate and characterize new xanthone compounds from processed gamboge.
- To evaluate the cytotoxic and antitumor activities of isolated compounds.
- To identify potential anti-cancer agents from natural sources.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation of new compounds via 1D and 2D NMR spectroscopy.
- Cytotoxicity assays against human hepatoma (SMMC-7221) and lung adenocarcinoma (A549) cell lines.
Main Results:
- Two novel xanthones, gambogollic acid (1) and epigambogollic acid (2), were identified.
- Three rare xanthones, gambogellic acid (3), epigambogellic acid (4), and gambogic acid (5), were also isolated.
- Compounds 1 and 2 exhibited excellent antitumor activity.
- All five isolated compounds demonstrated inhibitory effects against SMMC-7221 and A549 cells.
Conclusions:
- Gamboge is a rich source of structurally diverse xanthones with significant cytotoxic properties.
- Gambogollic acid and epigambogollic acid represent promising new leads for anti-cancer drug development.
- Further research into the mechanism of action of these compounds is warranted.
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