Analogues of the potent cytotoxic saponin OSW-1 were prepared from the readily available steroidal 16β,17α,22-triol. The new 22-deoxo-23-oxa analogues of OSW-1 were screened against eight cancer cell lines and normal human fibroblasts. The analogues proved to be slightly less active than OSW-1 but also less toxic to normal cells. They induce concentration- and time-dependent apoptosis of mammalian cancer cells with caspase-3 activation.
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| http://dx.doi.org/10.1021/jm101648h | DOI Listing |
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