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| Content Provider | PubMed Central |
|---|---|
| Author | Chen, Jun Xu, Na Huang, Huanwei Cai, Tao Xi, Rongwen |
| Editor | Spradling, Allan C. |
| Copyright Year | 2016 |
| Abstract | Homeostatic renewal of many adult tissues requires balanced self-renewal and differentiation of local stem cells, but the underlying mechanisms are poorly understood. Here we identified a novel feedback mechanism in controlling intestinal regeneration and tumorigenesis in Drosophila. Sox21a, a group B Sox protein, is preferentially expressed in the committed progenitor named enteroblast (EB) to promote enterocyte differentiation. In Sox21a mutants, EBs do not divide, but cannot differentiate properly and have increased expression of mitogens, which then act as paracrine signals to promote intestinal stem cell (ISC) proliferation. This leads to a feedback amplification loop for rapid production of differentiation-defective EBs and tumorigenesis. Notably, in normal intestine following damage, Sox21a is temporally downregulated in EBs to allow the activation of the ISC-EB amplification loop for epithelial repair. We propose that executing a feedback amplification loop between stem cells and their progeny could be a common mechanism underlying tissue regeneration and tumorigenesis. |
| Related Links | http://dx.doi.org/10.7554/elife.14330 |
| Starting Page | 14330 |
| File Format | |
| ISSN | 2050084X |
| e-ISSN | 2050084X |
| Journal | eLife |
| Volume Number | 5 |
| Language | English |
| Publisher | eLife Sciences Publications, Ltd |
| Publisher Date | 2016-05-01 |
| Access Restriction | Open |
| Rights Holder | eLife Sciences Publications, Ltd |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience Immunology and Microbiology Medicine Biochemistry, Genetics and Molecular Biology |
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