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- W3156739799 abstract "Cementum, a specialized bony layer covering an entire molar root surface, anchors teeth into alveolar bone. Gli1, a key transcriptional activator in Hedgehog signaling, has been identified as a mesenchymal progenitor cell marker in various tissues, including the periodontal ligament (PDL). To address the mechanisms by which Gli1+ progenitor cells contribute to cementogenesis, we used the Gli1lacZ/+ knock-in line to mark Gli1+ progenitors and the Gli1CreERT2/+; R26RtdTomato/+ line (named Gli1Lin) to trace Gli1 progeny cells during cementogenesis. Our data unexpectedly displayed a biphasic feature of Gli1+ PDL progenitor cells and cementum growth: a negative relationship between Gli1+ progenitor cell number and cementogenesis but a positive correlation between Gli1-derived acellular and cellular cementoblast cell number and cementum growth. DTA-ablation of Gli1Lin cells led to a cementum hypoplasia, including a significant reduction of both acellular and cellular cementoblast cells. Gain-of-function studies (by constitutive stabilization of β-catenin in Gli1Lin cells) revealed a cementum hyperplasia. A loss of function (by conditional deletion of β-catenin in Gli1+ cells) resulted in a reduction of postnatal cementum growth. Together, our studies support a vital role of Gli1+ progenitor cells in contribution to both types of cementum, in which canonical Wnt/β-catenin signaling positively regulates the differentiation of Gli1+ progenitors to cementoblasts during cementogenesis." @default.
- W3156739799 created "2021-04-26" @default.
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- W3156739799 date "2021-04-14" @default.
- W3156739799 modified "2023-10-18" @default.
- W3156739799 title "A Biphasic Feature of Gli1<sup>+</sup>-Mesenchymal Progenitors during Cementogenesis That Is Positively Controlled by Wnt/β-Catenin Signaling" @default.
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- W3156739799 doi "https://doi.org/10.1177/00220345211007429" @default.
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