Valenta, Tomas; Degirmenci, Bahar; Moor, Andreas E; Herr, Patrick; Zimmerli, Dario; Moor, Matthias B.; Hausmann, George; Cantù, Claudio; Aguet, Michel; Basler, Konrad (2016). Wnt Ligands Secreted by Subepithelial Mesenchymal Cells Are Essential for the Survival of Intestinal Stem Cells and Gut Homeostasis. Cell reports, 15(5), pp. 911-918. Cell Press 10.1016/j.celrep.2016.03.088
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Targeting of Wnt signaling represents a promising anti-cancer therapy. However, the consequences of systemically attenuating the Wnt pathway in an adult organism are unknown. Here, we globally prevent Wnt secretion by genetically ablating Wntless. We find that preventing Wnt signaling in the entire body causes mortality due to impaired intestinal homeostasis. This is caused by the loss of intestinal stem cells. Reconstitution of Wnt/β-catenin signaling via delivery of external Wnt ligands prolongs the survival of intestinal stem cells and reveals the essential role of extra-epithelial Wnt ligands for the renewal of the intestinal epithelium. Wnt2b is a key extra-epithelial Wnt ligand capable of promoting Wnt/β-catenin signaling and intestinal homeostasis. Wnt2b is secreted by subepithelial mesenchymal cells that co-express either Gli1 or Acta2. Subepithelial mesenchymal cells expressing high levels of Wnt2b are predominantly Gli1 positive.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
04 Faculty of Medicine > Department of Dermatology, Urology, Rheumatology, Nephrology, Osteoporosis (DURN) > Clinic of Nephrology and Hypertension |
UniBE Contributor: |
Moor, Matthias |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
2211-1247 |
Publisher: |
Cell Press |
Language: |
English |
Submitter: |
Matthias Moor |
Date Deposited: |
08 Oct 2019 14:28 |
Last Modified: |
05 Dec 2022 15:30 |
Publisher DOI: |
10.1016/j.celrep.2016.03.088 |
PubMed ID: |
27117411 |
BORIS DOI: |
10.7892/boris.133426 |
URI: |
https://boris.unibe.ch/id/eprint/133426 |
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