Abstract
Four new callipeltin A derivatives (N–Q) have been isolated from the Solomon Island marine sponge Asteropus sp. Their structures were established by spectroscopic techniques followed by acid hydrolysis and derivatisation of the free amino acids, and subsequent LCMS analysis of the derivatives. The compounds were evaluated for their activity against cancer cell lines A2058 (melanoma), HT-29 (colorectal adenocarcinoma) and MCF-7 (breast adenocarcinoma) and non-malignant MRC-5 fibroblast cells. While the acyclic callipeltins P and Q were inactive the cyclic callipeltins N and O showed significant cytotoxicity against all exposed cell lines with IC50 values as low as 0.16 μM confirming the role of cyclic configuration in biological activity.
Original language | English |
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Pages (from-to) | 6929-6934 |
Number of pages | 6 |
Journal | Tetrahedron |
Volume | 72 |
Issue number | 44 |
Early online date | 13 Sept 2016 |
DOIs | |
Publication status | Published - 3 Nov 2016 |
Bibliographical note
AcknowledgementsJ.T., E.H., I.P.V., and M.J. acknowledge the financial support of the EU seventh Framework Programme Project ‘PharmaSea’ (Grant no. KBBE 2012-2016) (Contract no. 312184) and acknowledge the support of the RSC for use of the MarinLit Data Base. K.F. and M.C. acknowledge the support of the NCDDG (Grant no. U19 CA67786) awarded to Professor C. M. Ireland, University of Utah, USA. J.T. and M.S. thank Dr. Somayah Elsayed Sameer of the University of Aberdeen for advice on amino acid hydrolysis and derivatisation.
Keywords
- Antiproliferative activity
- Asteropus
- Callipeltin
- Derivatisation
- LCMS
- NMR