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Cytotoxic geranyl stilbenes from Macaranga schweinfurthii
J A Beutler1, R H Shoemaker, T Johnson
1Laboratory of Drug Discovery Research and Development, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute-Frederick Cancer Research and Development Center, Frederick, Maryland 21702-1201, USA.
Journal of Natural Products
|December 30, 1998
Summary
Three new geranyl stilbenes, schweinfurthins A, B, and C, were isolated from Macaranga schweinfurthii. Their cytotoxicity profiles suggest potential shared mechanisms with other natural products.
Area of Science:
- Natural Product Chemistry
- Phytochemistry
- Medicinal Chemistry
Background:
- Macaranga schweinfurthii (Euphorbiaceae) is a plant species with potential medicinal properties.
- Geranyl stilbenes represent a class of natural products with diverse biological activities.
Purpose of the Study:
- To isolate and characterize novel geranyl stilbenes from Macaranga schweinfurthii.
- To evaluate the cytotoxicity of the isolated compounds using the NCI 60-cell screen.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation utilizing Nuclear Magnetic Resonance (NMR) and mass spectrometry.
- Cytotoxicity assessment via the National Cancer Institute (NCI) 60-cell line panel.
Main Results:
- Three new geranyl stilbenes, named schweinfurthins A, B, and C, were successfully isolated and identified.
- The isolated schweinfurthins exhibited cytotoxicity profiles comparable to known compounds like stelletins and cephalostatins.
- Structural diversity among these natural products was observed.
Conclusions:
- The novel compounds schweinfurthins A, B, and C are constituents of Macaranga schweinfurthii.
- The similar cytotoxicity profiles suggest potential shared mechanisms of action between schweinfurthins, stelletins, and cephalostatins.
- Further investigation into the cytotoxic mechanisms of these geranyl stilbenes is warranted.