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Cytotoxic Activity of Apomine is Due to a Novel Membrane-mediated Cytolytic Mechanism Independent of Apoptosis in the A375 Human Melanoma Cell Line

Overview
Publisher Springer
Specialty Oncology
Date 2006 Oct 7
PMID 17024575
Citations 4
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Abstract

Apomine, a novel bisphosphonate ester, has demonstrated anticancer activity in a variety of cancer cell lines; however, its mechanism of cytotoxicity is not well understood. Previous work has demonstrated that Apomine induces cell death by activation of caspase-3 in several cancer cell types. However, we have demonstrated that Apomine induces cell death in the A375 human melanoma cell line through a novel membrane-mediated mechanism that is independent of caspase-3 activation. This mechanism of membrane lysis may apply to other bisphosphonates and may be an important mechanism for overcoming resistance to apoptosis. Interestingly, Apomine-mediated cell death in the A375 and UACC 3093 human melanoma cell lines is also independent of N-Ras farnesylation, which was a previously described mechanism of action for Apomine in other cancer cell types. These data suggest that Apomine induces cell death through a novel plasma membrane-mediated cytolytic pathway, independent of caspase-3 activation and N-Ras farnesylation.

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