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- Title
Non-canonical Wnt signaling promotes directed migration of intestinal stem cells to sites of injury.
- Authors
Hu, Daniel Jun-Kit; Yun, Jina; Elstrott, Justin; Jasper, Heinrich
- Abstract
Tissue regeneration after injury requires coordinated regulation of stem cell activation, division, and daughter cell differentiation, processes that are increasingly well understood in many regenerating tissues. How accurate stem cell positioning and localized integration of new cells into the damaged epithelium are achieved, however, remains unclear. Here, we show that enteroendocrine cells coordinate stem cell migration towards a wound in the Drosophila intestinal epithelium. In response to injury, enteroendocrine cells release the N-terminal domain of the PTK7 orthologue, Otk, which activates non-canonical Wnt signaling in intestinal stem cells, promoting actin-based protrusion formation and stem cell migration towards a wound. We find that this migratory behavior is closely linked to proliferation, and that it is required for efficient tissue repair during injury. Our findings highlight the role of non-canonical Wnt signaling in regeneration of the intestinal epithelium, and identify enteroendocrine cell-released ligands as critical coordinators of intestinal stem cell migration. Stem cell migration is critical during adult tissue regeneration. Here, the authors demonstrate that enteroendocrine cells coordinate stem cell migration towards sites of injury in the Drosophila intestine by activating non-canonical Wnt signaling.
- Subjects
ENTEROENDOCRINE cells; STEM cells; WNT signal transduction; INTESTINES; CELL migration; CELLULAR control mechanisms
- Publication
Nature Communications, 2021, Vol 12, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-021-27384-4