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Cytotoxic ent-kauranoids from Isodon leucophyllus
Ai-Hua Zhao1, Wei Xiang, Zhi Na
1State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, Yunnan, China.
Journal of Asian Natural Products Research
|March 11, 2004
Summary
Two novel compounds, baiyecrystals D and E, were isolated from Isodon leucophyllus. Lasiocarpanin (8) demonstrated potent antineoplastic activity against K562 and Bcap37 cancer cell lines in vitro.
Area of Science:
- Natural Product Chemistry
- Pharmacology
- Medicinal Chemistry
Background:
- Isodon leucophyllus is a plant source of bioactive compounds.
- Natural products are explored for novel therapeutic agents.
Purpose of the Study:
- To isolate and characterize new chemical entities from Isodon leucophyllus.
- To evaluate the antineoplastic potential of isolated compounds.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation via comprehensive spectroscopic analysis, including 2D NMR.
- In vitro antineoplastic activity screening using cancer cell lines.
Main Results:
- Two new compounds, baiyecrystals D (1) and E (2), were identified.
- Eight known analogues were co-isolated.
- Lasiocarpanin (8) exhibited significant inhibition against K562 (IC50 = 0.13 μg/mL) and Bcap37 (IC50 = 1.26 μg/mL) cells.
- Activity of lasiocarpanin surpassed the positive control.
Conclusions:
- Isodon leucophyllus is a rich source of structurally diverse compounds.
- Lasiocarpanin is a promising candidate for further investigation as an antineoplastic agent.