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SOX9 is required for the differentiation of paneth cells in the intestinal epithelium.

Gastroenterology. 2007 Aug;133(2):539-46. Epub 2007 May 21
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摘要


BACKGROUND AND AIMS:The transcription factor SOX9 has been shown previously to have an essential role in the differentiation of a small number of discrete cell lineages. In the intestine, Sox9 is expressed in the epithelial cells of the crypts and is a target of Wnt signaling. METHODS:To examine the function of SOX9 in the intestine, we inactivated the Sox9 gene in intestinal epithelial cells by generating mice that harbored a conditional Sox9 gene and a Villin-Cre transgene. RESULTS:In the absence of SOX9, Paneth cells were not formed, but the differentiation of other intestinal epithelial cell types was unaffected. The lack of SOX9 also lead to crypt enlargement, to a marked increase in cell proliferation throughout the crypts, and to replacement of the Paneth cells by proliferating epithelial cells. CONCLUSIONS:We conclude that SOX9 is required for the differentiation of Paneth cells. Our results elucidate an essential step in the differentiation of gut epithelium.

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