Opposing activities of Notch and Wnt signaling regulate intestinal stem cells and gut homeostasis.
Opposing activities of Notch and Wnt signaling regulate intestinal stem cells and gut homeostasis.
复制标题
Notch和Wnt信号的相对活性调节肠道干细胞和肠内稳态。
DOI:
10.1016/j.celrep.2015.03.007
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发表时间:
2015-04-07
期刊:
影响因子:
8.8
通讯作者:
Klein OD
中科院分区:
文献类型:
--
作者:
Tian H;Biehs B;Chiu C;Siebel CW;Wu Y;Costa M;de Sauvage FJ;Klein OD
Proper organ homeostasis requires tight control of adult stem cells and differentiation through integration of multiple inputs. In the mouse small intestine, Notch and Wnt signaling are required both for stem cell maintenance and for a proper balance of differentiation between secretory and absorptive cell lineages. In the absence of Notch signaling, stem cells preferentially generate secretory cells at the expense of absorptive cells. Here, we use function-blocking antibodies against Notch receptors to demonstrate that Notch blockade perturbs intestinal stem cell function by causing a de-repression of the Wnt signaling pathway, leading to mis-expression of prosecretory genes. Importantly, attenuation of the Wnt pathway rescued the phenotype associated with Notch blockade. These studies bring to light a negative regulatory mechanism that maintains stem cell activity and balanced differentiation, and we propose that the interaction between Wnt and Notch signaling described here represents a common theme in adult stem cell biology.
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