alpha-Toxin of Staphylococcus aureus overcomes acquired cisplatin-resistance in malignant mesothelioma cells.
2008 (English)In: Cancer Letters, ISSN 0304-3835, Vol. 265, no 1, 67-75 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2008. Vol. 265, no 1, 67-75 p.
IdentifiersURN: urn:nbn:se:umu:diva-22902DOI: 10.1016/j.canlet.2008.02.007PubMedID: 18362050OAI: oai:DiVA.org:umu-22902DiVA: diva2:218472