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- W2335485909 abstract "Background. The serine/threonine kinase Aurora B is involved in the regulation of several mitotic processes, including chromosome condensation, congression and segregation as well as cytokinesis. These essential functions of Aurora B and its overexpression in many cancer types render this protein kinase an attractive target for anticancer drug development. Methods. BI 811283 was profiled in enzymatic kinase assays as well as in proliferation assays on various human cancer cell lines. Cell cycle status was assessed by DNA content analysis (Cellomics ArrayScan, FACScalibur). Histone H3 phosphorylation was determined by immunofluorescence (Cellomics ArrayScan). Apoptosis was detected by Western blotting for cleaved PARP and microscopic enumeration of DAPI-stained cells showing nuclear fragmentation. Senescent cells were identified by staining for SA-s-Gal activity. Results. BI 811283 inhibited human Aurora B kinase activity with an IC 50 value of 9 nM, Aurora A and C kinases with 70 nM and 17 nM, respectively. In a panel of 46 additional kinases representative of the human kinome, BI 811283 at 1000 nM inhibited 7/46 kinases by more than 50%. EC 50 values for inhibition of proliferation of >20 human cancer cell lines were in the range of 2 to 14 nM. In the non-small cell lung cancer cell line NCI-H460, treatment with BI 811283 resulted in a rapid ( 80%, paralleled by a marked increase in cell volume. An increase of cleaved poly (ADP-ribose) polymerase and a concomitant increase in the fraction of cells with nuclear fragmentation from Conclusions. BI 811283 is a potent and selective Aurora kinase inhibitor that inhibits proliferation of cancer cells independent of tissue origin or oncogenome status. Treated cells exhibit a polyploid phenotype characteristic for Aurora B inhibition and show hallmarks of senescence as well as a slow onset of apoptosis in a small fraction of cells. In vivo activity of BI 811283 has been demonstrated in multiple cancer xenograft models in nude mice (see accompanying poster). Phase I clinical trials are ongoing. Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 101st Annual Meeting of the American Association for Cancer Research; 2010 Apr 17-21; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2010;70(8 Suppl):Abstract nr 1080." @default.
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- W2335485909 date "2010-04-15" @default.
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- W2335485909 title "Abstract 1080: Molecular and cellular pharmacology of BI 811283, a potent inhibitor of Aurora B kinase" @default.
- W2335485909 doi "https://doi.org/10.1158/1538-7445.am10-1080" @default.
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