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• W2164881750 abstract "During skeletogenesis, protein levels of beta-catenin in the canonical Wnt signaling pathway determine lineage commitment of skeletal precursor cells to osteoblasts and chondrocytes. Adenomatous polyposis coli (Apc) is a key controller of beta-catenin turnover by down-regulating intracellular levels of beta-catenin.To investigate whether Apc is involved in lineage commitment of skeletal precursor cells, we generated conditional knockout mice lacking functional Apc in Col2a1-expressing cells. In contrast to other models in which an oncogenic variant of beta-catenin was used, our approach resulted in the accumulation of wild type beta-catenin protein due to functional loss of Apc. Conditional homozygous Apc mutant mice died perinatally showing greatly impaired skeletogenesis. All endochondral bones were misshaped and lacked structural integrity. Lack of functional Apc resulted in a pleiotropic skeletal cell phenotype. The majority of the precursor cells lacking Apc failed to differentiate into chondrocytes or osteoblasts. However, skeletal precursor cells in the proximal ribs were able to escape the noxious effect of functional loss of Apc resulting in formation of highly active osteoblasts. Inactivation of Apc in chondrocytes was associated with dedifferentiation of these cells.Our data indicate that a tight Apc-mediated control of beta-catenin levels is essential for differentiation of skeletal precursors as well as for the maintenance of a chondrocytic phenotype in a spatio-temporal regulated manner." @default.
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• W2164881750 date "2009-04-08" @default.
• W2164881750 modified "2023-10-04" @default.
• W2164881750 title "Adenomatous polyposis coli-mediated control of β-catenin is essential for both chondrogenic and osteogenic differentiation of skeletal precursors" @default.
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• W2164881750 doi "https://doi.org/10.1186/1471-213x-9-26" @default.
• W2164881750 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2678105" @default.
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• W2164881750 hasPublicationYear "2009" @default.
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