期刊
CANCER LETTERS
卷 265, 期 1, 页码 67-75出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.canlet.2008.02.007
关键词
staphylococcal alpha-toxin; alpha-hemolysin; cisplatin; acquired resistance; apoptosis; alpha-toxin
类别
alpha-Toxin (alpha-hemolysin) of Staphylococcus aureus is a pore-forming bacterial toxin which after caveolin-1-dependent assembly induces apoptosis in eukaryotic cells. We investigated if a sub-toxic concentration of staphylococcal alpha-toxin could enhance cisplatin-induced apoptosis and overcome acquired cisplatin-resistance in cultured malignant pleural mesothelioma (MPM) cells. MPM cells (P31wt) and a cisplatin-resistant sub-line (P31res) was incubated with alpha-toxin and/or cisplatin followed by determination of cell viability, apoptosis, and signaling pathways. P31res cells were more sensitive to alpha-toxin than P31 wt cells due to induction of apoptosis. A low-toxic concentration of alpha-toxin re-sensitized cisplatin P31res cytotoxicity by apoptosis-induced through the mitochondrial pathway without detectable activation of common up-stream apoptosis signaling proteins. The toxin/drug combination should be tested for cisplatin-resistant mesothelioma treatment. (C) 2008 Elsevier Ireland Ltd. All rights reserved.
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