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• W2023130049 abstract "BPR0Y007, a bis-benzylidenecyclopentanone derivative (2,5-bis- (4-hydroxy-3-methoxybenzylidene) cyclopentanone), was identified in our laboratory as a novel antineoplastic agent with a broad spectrum of antitumor activity against many human cancer cells. A previous study showed that BPR0Y007 inhibited DNA topoisomerase I (Top 1) activity and prevented tubulin polymerization. Notably, no cross-resistance with BPR0Y007 was observed in camptothecin-, VP-16- or vincristine-resistant cell lines. In this study, we further investigated the cellular and molecular events underlying the antitumoral function of this compound in human oral epidermoid carcinoma KB cells, focusing on the early cytotoxic effect. Treatment of KB cells with BPR0Y007-induced G(2)/M phase arrest followed by sub-G(1) phase accumulation. Annexin-V-propidium iodide (PI) binding assay and DNA fragmentation assay further indicated that BPR0Y007-induced cell death proceeded through an apoptotic pathway as opposed to via necrosis. This compound produced a time-dependent activation of caspases-3 and -8, however, another caspase-3 initiator, caspase-9, was only marginally activated at later time point. We further demonstrated that the activation of the caspases cascade and nuclear fragmentation was not associated with inactivated Bcl-2 and perturbed mitochondrial membrane potential by BPR0Y007. The finding that BPR0Y007-induced apoptosis through a membrane-mediated mechanism was supported by up-regulated expression of Fas (CD95/APO-1), but not Fas-L. Furthermore, up-regulation of p53 and its affected gene, MDM2, in KB cells was found after BPR0Y007 exposure. Overall, our results demonstrated that the BPR0Y007 could induce an early cytotoxic apoptosis through a caspase-8-dependent but mitochondrial-caspase-9 independent pathway, and involving upregulation of p53." @default.
• W2023130049 created "2016-06-24" @default.
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• W2023130049 date "2004-07-01" @default.
• W2023130049 modified "2023-09-25" @default.
• W2023130049 title "A novel bis-benzylidenecyclopentanone derivative, BPR0Y007, inducing a rapid caspase activation involving upregulation of Fas (CD95/APO-1) and wild-type p53 in human oral epidermoid carcinoma cells" @default.
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• W2023130049 doi "https://doi.org/10.1016/j.bcp.2004.03.036" @default.
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