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Bengamides revisited: new structures and antitumor studies
Z Thale1, F R Kinder, K W Bair
1Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA.
The Journal of Organic Chemistry
|March 23, 2001
Summary
Researchers identified new bengamides from marine sponges, with some showing potent anticancer activity. Bengamides A and O demonstrated significant in vitro antitumor effects against human mammary carcinoma cells.
Area of Science:
- Marine Natural Products Chemistry
- Organic Chemistry
- Pharmacology
Background:
- Bengamides are a class of compounds isolated from marine organisms.
- Previous studies have characterized some bengamides, but further investigation into their structural chemistry and biological activity is needed.
Purpose of the Study:
- To further characterize the structural chemistry and biological activity of bengamides.
- To identify and isolate new bengamide compounds from Jaspis cf. coriacea.
- To evaluate the cytotoxicity and in vitro antitumor activity of identified bengamides.
Main Methods:
- Extraction and isolation of compounds from Jaspis cf. coriacea collected in Fiji.
- Structure elucidation using spectroscopic data (NMR, MS).
- Semisynthesis for structural confirmation.
- Cytotoxicity screening using the NCI-DTP 60 cell screen.
- In vitro antitumor activity assay against MDA-MB-435 human mammary carcinoma.
Main Results:
- Six new bengamides (M, N, O, P, Q, R) were identified, along with eleven known bengamides.
- Bengamides A and B exhibited significant cytotoxicity, with IC(50) values in the femtomolar range.
- Natural bengamides A and O displayed potent in vitro antitumor activity against human mammary carcinoma, with IC(50) values of 1 nM and 0.3 nM, respectively.
Conclusions:
- The study expands the known bengamide chemical diversity and provides valuable insights into their biological activities.
- Bengamides A and O are promising candidates for further investigation as potential anticancer agents.