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- W2077461432 abstract "Inhibition of cyclin-dependent-kinases (CDKs) represents an interesting approach in cancer therapy. We have explored this in cell lines of human uterine sarcoma-tumours associated with poor survival, chemo-unresponsiveness and deregulation of cell cycle components. We studied the effects of the CDK inhibitor seliciclib (CYC202, R-roscovitine) when used alone or in combination with cisplatin.Cell lines used: SK-UT-1, SK-UT-1b and SK-LMS-1, the cytotoxicity of seliciclib and cisplatin was measured by the MTT assay. In combination with cisplatin the effects of seliciclib were examined by isobologram analysis. CDK2 levels were examined at mRNA and protein level by immunoblotting and PCR. We also looked at the effects of seliciclib on p53-dependent response of cells to seliciclib using immunoblotting. The effects of combination treatment were analysed using annexin V and PI staining by flow cytometric analysis.IC50 values for seliciclib were 10.5, 7.1 and 25.7 microM, for SK-UT-1, SK-UT-1b and SK-LMS-1 respectively, P53 in the SK-UT-1b (wild-type) and SK-LMS-1 lines (mutant) showed a wild-type response with induction seen with seliciclib treatment for 24 and 48 h. Seliciclib caused a decrease in CDK2 mRNA and protein over 72 h. A combination of cisplatin and seliciclib was synergistic in all three cell lines. Effects of combination treatment were an enhancement in apoptosis as judged by the emergence of a sub-G1 population in cell cycle analysis and a sub-G1 population with PI staining.Our data demonstrate the effectiveness of seliciclib as a single agent and when used in combination with cisplatin where the effects are synergistic." @default.
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- W2077461432 date "2007-05-01" @default.
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- W2077461432 title "The effects of the CDK inhibitor seliciclib alone or in combination with cisplatin in human uterine sarcoma cell lines" @default.
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- W2077461432 doi "https://doi.org/10.1016/j.ygyno.2007.01.004" @default.
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