Aberrant epithelial GREM1 expression initiates colonic tumorigenesis from cells outside the stem cell niche
Research output: Contribution to journal › Article › peer-review
Colleges, School and Institutes
- University of Oxford
- Columbia University Medical Center
- 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.
- Polyposis registry, St Mark's Hospital, Northwick Park, Watford Road, Harrow, HA1 3UJ, UK.
- Histopathology department, University College London Hospital, Rockefeller Building, University Street, London, WC1, UK.
- Laboratory Medicine Program, University Health Network and University of Toronto, 200 Elizabeth Street, Toronto, M5G 2C4, Canada.
- Beatson Institute for Cancer Research, Garscube Estate, Switchback Road, Bearsden, Glasgow, G61 1BD, UK.
- Georg-Speyer-Haus Institute for Tumor Biology and Experimental Therapy, Paul-Ehrlich-Str. 42-44, 60596 Frankfurt, Germany.
- 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.
Hereditary mixed polyposis syndrome (HMPS) is characterized by the development of mixed-morphology colorectal tumors and is caused by a 40-kb genetic duplication that results in aberrant epithelial expression of the gene encoding mesenchymal bone morphogenetic protein antagonist, GREM1. Here we use HMPS tissue and a mouse model of the disease to show that epithelial GREM1 disrupts homeostatic intestinal morphogen gradients, altering cell fate that is normally determined by position along the vertical epithelial axis. This promotes the persistence and/or reacquisition of stem cell properties in Lgr5-negative progenitor cells that have exited the stem cell niche. These cells form ectopic crypts, proliferate, accumulate somatic mutations and can initiate intestinal neoplasia, indicating that the crypt base stem cell is not the sole cell of origin of colorectal cancer. Furthermore, we show that epithelial expression of GREM1 also occurs in traditional serrated adenomas, sporadic premalignant lesions with a hitherto unknown pathogenesis, and these lesions can be considered the sporadic equivalents of HMPS polyps.
|Number of pages||9|
|Early online date||1 Dec 2014|
|Publication status||Published - Jan 2015|
- Animals, Carcinogenesis, Cell Proliferation, Colorectal Neoplasms, Epithelial Cells, Gene Expression Regulation, Neoplastic, Humans, Intercellular Signaling Peptides and Proteins, Intestinal Mucosa, Mice, Mutation, Receptors, G-Protein-Coupled, Stem Cell Niche, Journal Article, Research Support, Non-U.S. Gov't