Inhibition of SYK kinase does not confer a pro-proliferative or pro-invasive phenotype in breast epithelium or breast cancer cells
| Autor: | Nathalie Harrer, Annika Osswald, Andreas Wernitznig, Ingrid Christ, Albin Rudisch, Aleksander Rust, David J. Lamb, Herwig Machat, Wolfgang Sommergruber, Florian Colbatzky, Tobias Glüxam |
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| Rok vydání: | 2020 |
| Předmět: |
3D culture
0301 basic medicine Kinase proliferation Syk Biology medicine.disease Phenotype SYK inhibitor 03 medical and health sciences 030104 developmental biology 0302 clinical medicine Breast cancer Oncology 030220 oncology & carcinogenesis Invadopodia medicine Cancer research MMP14 breast carcinoma Kinase activity Breast carcinoma murine mammary gland Research Paper |
| Zdroj: | Oncotarget |
| ISSN: | 1949-2553 |
| DOI: | 10.18632/oncotarget.27545 |
| Popis: | SYK has been reported to possess both tumour promotor and repressor activities and deletion has been linked to a pro-proliferative / pro-invasive phenotype in breast tumours. It is unclear whether this is a consequence of protein deletion or loss of kinase activity. The SYK inhibitor, BI 1002494, caused no increase in proliferation in breast cancer cells or primary mammary epithelial cells in 2D or 3D cultures, nor changes in proliferation (CD1/2, CDK4, PCNA, Ki67) or invadopodia markers (MMP14, PARP, phospho-vimentin Ser56). BI 1002494 did not alter SYK protein expression. There was no change in phenotype observed in 3D cultures after addition of BI 1002494. Thirteen weeks of treatment with BI 1002494 resulted in no ductal branching or cellular proliferation in the mammary glands of mice. An in silico genetic analysis in breast tumour samples revealed no evidence that SYK has a typical tumour suppressor gene profile such as focal deletion, inactivating mutations or lower expression levels. Furthermore, SYK mutations were not associated with reduction in survival and disease-free period in breast cancer patients. In conclusion, small molecule inhibition of the kinase function of SYK does not contribute to a typical tumour suppressor profile. |
| Databáze: | OpenAIRE |
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