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Identification of stem cells in small intestine and colon by marker gene Lgr5
TLDR
The expression pattern of Lgr5 suggests that it marks stem cells in multiple adult tissues and cancers, suggesting that it represents the stem cell of the small intestine and colon. Expand
Single Lgr5 stem cells build crypt–villus structures in vitro without a mesenchymal niche
TLDR
It is concluded that intestinal crypt–villus units are self-organizing structures, which can be built from a single stem cell in the absence of a non-epithelial cellular niche. Expand
Wnt/beta-catenin signaling in development and disease.
TLDR
A remarkable interdisciplinary effort has unraveled the WNT (Wingless and INT-1) signal transduction cascade over the last two decades, finding that Germline mutations in the Wnt pathway cause several hereditary diseases and somatic mutations are associated with cancer of the intestine and a variety of other tissues. Expand
Constitutive Transcriptional Activation by a β-Catenin-Tcf Complex in APC−/− Colon Carcinoma
TLDR
Constitutive transcription of Tcf target genes, caused by loss of APC function, may be a crucial event in the early transformation of colonic epithelium. Expand
Wnt/β-Catenin Signaling and Disease
TLDR
An update of the core Wnt/β-catenin signaling pathway is provided, how its various components contribute to disease, and outstanding questions to be addressed in the future are discussed. Expand
Paneth cells constitute the niche for Lgr5 stem cells in intestinal crypts
TLDR
It is concluded that Lgr5 stem cells compete for essential niche signals provided by a specialized daughter cell, the Paneth cell, in colon crypts, and co-culturing of sorted stem cells with Paneth cells markedly improves organoid formation. Expand
Wnt signalling in stem cells and cancer
TLDR
Insights gained from understanding how the Wnt pathway is integrally involved in both stem cell and cancer cell maintenance and growth in the intestinal, epidermal and haematopoietic systems may serve as a paradigm for understanding the dual nature of self-renewal signals. Expand
Activation of β-Catenin-Tcf Signaling in Colon Cancer by Mutations in β-Catenin or APC
TLDR
Results indicate that regulation of β-catenin is critical to APC's tumor suppressive effect and that this regulation can be circumvented by mutations in either APC or β- catenin. Expand
XTcf-3 Transcription Factor Mediates β-Catenin-Induced Axis Formation in Xenopus Embryos
TLDR
It is proposed that signaling by beta-catenin involves complex formation with XT cf-3, followed by nuclear translocation and activation of specific XTcf-3 target genes, which suppresses endogenous axis specification upon injection into the dorsal blastomeres of a 4-cell-stage embryo. Expand
Caught up in a Wnt storm: Wnt signaling in cancer.
TLDR
This review considers the spectra of tumors arising from active Wnt signaling and attempts to place perspective on recent data that begin to elucidate the mechanisms prompting uncontrolled cell growth following induction of Wnt signalling. Expand
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