ArticlebioRxiv : the preprint server for biology2025
Designed Soluble Notch Agonist Drives Human Ameloblast Maturation for Tooth Regeneration.
Article in bioRxiv : the preprint server for biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Enamel, the hardest material in the human body, is required to protect our living organ, tooth. However, over 90% of adults have lost or damaged enamel and cannot regenerate the protective structure due to lack of enamel producing cells, ameloblasts. iPSC derived mature Ameloblasts (iAM) have promise in future regenerative dentistry. Today it is not known why iAM maturation requires intimate contact with the dentin producing cell type, odontoblast. Here we reveal that one of the critical signaling ligands emanating from odontoblasts for ameloblast maturation is Delta, the ligand for Notch receptor. We showed that our designed, soluble Notch agonist can induce iAM organoid maturation in an unprecedented manner, without interactions with odontoblast layer. This novel maturation procedure enables us to analyze the specific requirements of DLX3 function in ameloblasts, independent of its known function in odontoblasts. We now show that DLX3, the gene associated with Amelogenesis Imperfecta, is required on a cell-autonomous manner in ameloblasts for the expression of Enamelin and MMP20.
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