Bone morphogenetic protein and Notch signalling crosstalk in poor-prognosis, mesenchymal-subtype colorectal cancer
Research output: Contribution to journal › Article › peer-review
Colleges, School and Institutes
- University of Oxford
- PsychoGenics Inc., 765 Old Saw Mill River Road, Tarrytown, NY, USA.
- Columbia University Medical Center
- From the Division of Cardiovascular Medicine, British Heart Foundation Centre for Research Excellence, Radcliffe Department of Medicine, John Radcliffe Hospital, United Kingdom (E.M., D.J., J.P., P.C., K.M.C.); Wellcome Trust Centre for Human Genetics, Headington, Oxford, United Kingdom (E.M., J.P., P.C., K.M.C.); and Sir William Dunn School of Pathology, University of Oxford, United Kingdom (A.J.I., L.T., D.R.G.). email@example.com.
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland.
- Department of Surgery, Oncology and Gastroenterology, University Hospital Padova, Padova, Italy.
- Oxford Brookes University
- Colorectal Cancer Genetics, Centre for Digestive Diseases, Blizard Institute, Barts and the London School of Medicine and Dentistry, 4 Newark Street, Whitechapel, London, E1 2AT, UK.
- Cellular Pathology, Level 1, John Radcliffe Hospital, Headington, Oxford, OX3 9DU, UK.
- Translational Gastroenterology Unit, Experimental Medicine Division, Nuffield Department of Clinical Medicine, John Radcliffe Hospital, Headington, Oxford, OX3 9DU, UK.
The functional role of bone morphogenetic protein (BMP) signalling in colorectal cancer (CRC) is poorly defined, with contradictory results in cancer cell line models reflecting the inherent difficulties of assessing a signalling pathway that is context-dependent and subject to genetic constraints. By assessing the transcriptional response of a diploid human colonic epithelial cell line to BMP ligand stimulation, we generated a prognostic BMP signalling signature, which was applied to multiple CRC datasets to investigate BMP heterogeneity across CRC molecular subtypes. We linked BMP and Notch signalling pathway activity and function in human colonic epithelial cells, and normal and neoplastic tissue. BMP induced Notch through a γ-secretase-independent interaction, regulated by the SMAD proteins. In homeostasis, BMP/Notch co-localization was restricted to cells at the top of the intestinal crypt, with more widespread interaction in some human CRC samples. BMP signalling was downregulated in the majority of CRCs, but was conserved specifically in mesenchymal-subtype tumours, where it interacts with Notch to induce an epithelial-mesenchymal transition (EMT) phenotype. In intestinal homeostasis, BMP-Notch pathway crosstalk is restricted to differentiating cells through stringent pathway segregation. Conserved BMP activity and loss of signalling stringency in mesenchymal-subtype tumours promotes a synergistic BMP-Notch interaction, and this correlates with poor patient prognosis. BMP signalling heterogeneity across CRC subtypes and cell lines can account for previous experimental contradictions. Crosstalk between the BMP and Notch pathways will render mesenchymal-subtype CRC insensitive to γ-secretase inhibition unless BMP activation is concomitantly addressed. © 2017 The Authors. Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
|Number of pages||15|
|Journal||Journal of Pathology|
|Early online date||3 May 2017|
|Publication status||Published - Jun 2017|
- Amyloid Precursor Protein Secretases/genetics, Bone Morphogenetic Proteins/genetics, Cell Differentiation, Cohort Studies, Colorectal Neoplasms/diagnosis, Epithelial Cells/pathology, Epithelial-Mesenchymal Transition, Gene Expression Profiling, Gene Expression Regulation, Neoplastic, Humans, Kaplan-Meier Estimate, Models, Biological, Phenotype, Prognosis, Receptors, Notch/genetics, Signal Transduction, Smad Proteins/genetics