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Pubmed ID: 16801560
Publication Date: 2006/06/26

Nanog binds to Smad1 and blocks bone morphogenetic protein-induced differentiation of embryonic stem cells.


ES cells represent a valuable model for investigating early embryo development and hold promise for future regenerative medicine strategies. The self-renewal of pluripotent mouse ES cells has been shown to require extrinsic stimulation by the bone morphogenetic protein (BMP) and leukemia inhibitory factor signaling pathways and the expression of the transcription factors Oct4 and Nanog. However, the network of interactions among extrinsic and intrinsic determinants of ES cell pluripotency is currently poorly understood. Here, we show that Nanog expression is up-regulated in mouse ES cells by the binding of T (Brachyury) and STAT3 to an enhancer element in the mouse Nanog gene. We further show that Nanog blocks BMP-induced mesoderm differentiation of ES cells by physically interacting with Smad1 and interfering with the recruitment of coactivators to the active Smad transcriptional complexes. Taken together, our findings illustrate the existence of ES cell-specific regulatory networks that underlie the maintenance of ES cell pluripotency and provide mechanistic insights into the role of Nanog in this process.
Authors: Suzuki Atsushi , Raya Ángel , Kawakami Yasuhiko , Morita Masanobu , Matsui Takaaki , Nakashima Kinichi , Gage Fred H , Rodríguez-Esteban Concepción , Izpisúa Belmonte Juan Carlos ,

Reference:

  1. ncbi.nlm.nih.gov. [Last access 2006/06/26].

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