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Bioorg Med Chem. 2009 Mar 1;17(5):2002-8. doi: 10.1016/j.bmc.2009.01.022. Epub 2009 Jan 15.

Haemolytic activity, cytotoxicity and membrane cell permeabilization of semi-synthetic and natural lupane- and oleanane-type saponins.

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1
Laboratoire LASEVE, Chaire de Recherche sur les Agents Anticancéreux d'Origine Naturelle, Université du Québec à Chicoutimi, Chicoutimi, Québec, Canada.

Abstract

The haemolysis of red blood cells inducing toxicity in most animals including humans is a major drawback for the clinical development of saponins as antitumour agents. In this study, the haemolytic and cytotoxic activities as well as the membrane cell permeabilization property of a library of 31 semi-synthetic and natural lupane- and oleanane-type saponins were evaluated and the structure-activity relationships were established. It was shown that lupane-type saponins do not exhibit any haemolytic activity and membrane cell permeabilization property at the maximum concentration tested (100 microM) independently of the nature of the sugar moieties. While oleanane-type saponins such as beta-hederin (25) and hederacolchiside A(1) (27) cause the death of cancer cell lines by permeabilizing the cellular membranes, lupane-type saponins seem to proceed via another mechanism, which could be related to the induction of apoptosis. Altogether, the results indicate that the cytotoxic lupane-type glycosides 10 and 22 bearing an alpha-l-rhamnopyranose moiety at the C-3 position represent promising antitumour agents for further studies on tumour-bearing mice since they are devoid of toxicity associated with the haemolysis of red blood cells.

PMID:
19200744
DOI:
10.1016/j.bmc.2009.01.022
[Indexed for MEDLINE]

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