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Proteomics of Patient-derived Breast Tumours Identifies a Pro-migratory Osteomodulin-Cyclin Dependent Kinase 1 Axis which Drives Bone Metastasis
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Proteomics of Patient-derived Breast Tumours Identifies a Pro-migratory Osteomodulin-Cyclin Dependent Kinase 1 Axis which Drives Bone Metastasis
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Proteomics of Patient-derived Breast Tumours Identifies a Pro-migratory Osteomodulin-Cyclin Dependent Kinase 1 Axis which Drives Bone Metastasis
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Paper
Proteomics of Patient-derived Breast Tumours Identifies a Pro-migratory Osteomodulin-Cyclin Dependent Kinase 1 Axis which Drives Bone Metastasis
2023
Overview
Breast cancer remains a leading cause of mortality, predominantly due to the development of metastases to vital organs. At present, predictive biomarkers of organ specific metastasis and therapies targeted to the metastatic niche are limited. Here, to identify the molecular determinants of breast cancer metastasis we analysed patient-derived breast tumours by combining quantitative proteomics, bioinformatics, and functional assays in vitro and in vivo. We identified elevated levels of the protein Osteomodulin (OMD) associated with breast cancer bone metastases in patient-derived samples. OMD overexpression in the breast cancer MDA-MB-231 cell model significantly increases cell migration in vitro and promotes the formation of bone metastases in vivo. Phosphoproteomics analysis of MDA-MB-231 cells expressing OMD identifies active Cyclin-dependent kinase 1 (CDK1) downstream of OMD. The importance of the OMD-CDK1 axis was validated using two independent phosphoproteomics datasets analysing patient-derived breast cancer samples. We also show that the OMD-CDK1 axis drives cell migration and cell viability in vitro and the formation of bone metastases in vivo. Finally, CDK1 inhibition reduces in vitro cell viability of an independent cohort of metastatic patient samples showing high CDK1 activity. Therefore, the OMD-CDK1 axis will determine which breast cancer patients develop bone metastases and is a therapeutic target to treat or prevent breast cancer bone metastases.Competing Interest StatementThe authors have declared no competing interest.
Publisher
Cold Spring Harbor Laboratory Press,Cold Spring Harbor Laboratory
