nanog induces hyperplasia without initiating tumors
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ID: 223828
2014
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Abstract
Though expression of the homeobox transcription factor Nanog is generally restricted to pluripotent cells and early germ cells, many contradictory reports about Nanog's involvement in tumorigenesis exist. To address this, a modified Tet-On system was utilized to generate Nanog-inducible mice. Following prolonged Nanog expression, phenotypic alterations were found to be restricted to the intestinal tract, leaving other major organs unaffected. Intestinal and colonic epithelium hyperplasia was observed—intestinal villi had doubled in length and hyperplastic epithelium outgrowths were seen after 7 days. Increased proliferation of crypt cells and downregulation of the tumor suppressors Cdx2 and Klf4 was detected. ChIP analysis showed physical interaction of Nanog with the Cdx2 and Klf4 promoters, indicating a regulatory conservation from embryonic development. Despite downregulation of tumor suppressors and increased proliferation, ectopic Nanog expression did not lead to tumor formation. We conclude that unlike other pluripotency-related transcription factors, Nanog cannot be considered an oncogene.
| Reference Key |
fischedick2014stemnanog
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|---|---|
| Authors | ;Gerrit Fischedick;Guangming Wu;Kenjiro Adachi;Marcos J. Araúzo-Bravo;Boris Greber;Martina Radstaak;Gabriele Köhler;Natalia Tapia;Roberto Iacone;Konstantinos Anastassiadis;Hans R. Schöler;Holm Zaehres |
| Journal | journal of energy chemistry |
| Year | 2014 |
| DOI |
10.1016/j.scr.2014.08.001
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| URL | |
| Keywords |
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