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Instructive role of Wnt/beta-catenin in sensory fate specification in neural crest stem cells
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H.Y. Lee, M. Kleber, L. Hari, V. Brault, U. Suter, M.M. Taketo, R. Kemler, and L. Sommer Instructive role of Wnt/beta-catenin in sensory fate specification in neural crest stem cells Science 303 2004 1020 1023
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Kemler, R.7
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Canonical Wnt signals are essential for homeostasis of the intestinal epithelium
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D. Pinto, A. Gregorieff, H. Begthel, and H. Clevers Canonical Wnt signals are essential for homeostasis of the intestinal epithelium Genes Dev 17 2003 1709 1713
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The beta-catenin/TCF-4 complex imposes a crypt progenitor phenotype on colorectal cancer cells
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M. van de Wetering, E. Sancho, C. Verweij, W. de Lau, I. Oving, A. Hurlstone, K. van der Horn, E. Batlle, D. Coudreuse, and A.P. Haramis The beta-catenin/TCF-4 complex imposes a crypt progenitor phenotype on colorectal cancer cells Cell 111 2002 241 250
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Coudreuse, D.9
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48
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Links between signal transduction, transcription and adhesion in epithelial bud development
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C. Jamora, R. DasGupta, P. Kocieniewski, and E. Fuchs Links between signal transduction, transcription and adhesion in epithelial bud development Nature 422 2003 317 322 During hair follicle formation, noggin, a BMP inhibitor, increases Lef1 expression whereas Wnt signaling stablizes β-catenin in skin epithelial stem cells. Unexpectedly, the β-catenin/Lef1 complex functions in hair follicle morphogenesis by repressing E-cadherin expression.
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Nature
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Jamora, C.1
Dasgupta, R.2
Kocieniewski, P.3
Fuchs, E.4
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Wnt proteins are lipid-modified and can act as stem cell growth factors
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K. Willert, J.D. Brown, E. Danenberg, A.W. Duncan, I.L. Weissman, T. Reya, J.R. Yates III, and R. Nusse Wnt proteins are lipid-modified and can act as stem cell growth factors Nature 423 2003 448 452 These authors were the first to purify active Wnt ligands. Notably, whereas purified Wnt3a promotes proliferation and maintenance of the undifferentiated state of haematopoietic stem cell, unpurified Wnt3a-conditioned media induces differentiation of haematopoietic stem cells.
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Nature
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Willert, K.1
Brown, J.D.2
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Duncan, A.W.4
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Yates III, J.R.7
Nusse, R.8
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50
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0037737728
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A role for Wnt signalling in self-renewal of haematopoietic stem cells
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T. Reya, A.W. Duncan, L. Ailles, J. Domen, D.C. Scherer, K. Willert, L. Hintz, R. Nusse, and I.L. Weissman A role for Wnt signalling in self-renewal of haematopoietic stem cells Nature 423 2003 409 414 In this study, the authors demonstrated that cultured haematopoietic stem cells (HSC), when infected with a virus expressing constitutively active β-catenin, showed upregulation of HoxB4 and Notch1, remained in an undifferentiated state and proliferate over long period of time. Injection of a small number of the infected HSCs into lethally irradiated mice was sufficient to reconstitute the haematopoietic system in vivo. In contrast, blocking the Wnt pathway in cultured HSCs by interfering with Wnt binding or overexpressing Axin resulted in reduced proliferation and survival rate. The Axin-infected HSCs also show much reduced capacity to reconstitute the haematopoietic system in vivo. This study demonstrated conclusively the essential role of Wnt signaling in HSC self-renewal.
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Nature
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Reya, T.1
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Ailles, L.3
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Hintz, L.7
Nusse, R.8
Weissman, I.L.9
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Wnt signaling induces the myogenic specification of resident CD45+ adult stem cells during muscle regeneration
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A. Polesskaya, P. Seale, and M.A. Rudnicki Wnt signaling induces the myogenic specification of resident CD45+ adult stem cells during muscle regeneration Cell 113 2003 841 852 The authors showed that stem cells expressing the haematopoietic marker CD45 and stem cell antigen-1 (Sca1), when isolated from regenerating muscle, could give rise to myoblasts while those isolated from uninjured muscle can not. Expression of several Wnts and nuclear accumulation of β-catenin were induced in regenerating muscles. Inhibiting Wnt signaling in regenerating muscle blocked myogenic recruitment of CD45+ Sca1+ cells. In contrast, in vitro activation of Wnt signaling could induce myoblast differentiation from CD45+ Sca1+ cells isolated from uninjured muscles.
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Cell
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Polesskaya, A.1
Seale, P.2
Rudnicki, M.A.3
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