Depletion of epithelial stem-cell compartments in the small intestine of mice lacking Tcf-4

Vladimir Korinek, Nick Barker, Petra Moerer, Elly Van Donselaar, Gerwin Huls, Peter J. Peters, Hans Clevers

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1356 Citaten (Scopus)

Samenvatting

Mutations of the genes encoding APC or β-catenin in colon carcinoma induce the constitutive formation of nuclear β-catenin/Tcf4 complexes, resulting in activated transcription of Tcf target genes. To study the physiological role of Tcf-4 (which is encoded by the Tcf7/2 gene), we disrupted Tcf7/2 by homologous recombination. Tcf7/2(-/-) mice die shortly after birth. A single histopathological abnormality was observed. An apparently normal transition of intestinal endoderm into epithelium occurred at approximately embryonic day (E) 14.5. However, no proliferative compartments were maintained in the prospective crypt regions between the villi. As a consequence, the neonatal epithelium was composed entirely of differentiated, non-dividing villus cells. We conclude that the genetic program controlled by Tcf-4 maintains the crypt stem cells of the small intestine. The constitutive activity of Tcf-4 in APC-deficient human epithelial cells may contribute to their malignant transformation by maintaining stem-cell characteristics.

Originele taal-2Engels
Pagina's (van-tot)379-383
Aantal pagina's5
TijdschriftNature Genetics
Volume19
Nummer van het tijdschrift4
DOI's
StatusGepubliceerd - 1998
Extern gepubliceerdJa

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