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Lavicky J, Kolouskova M, Prochazka D, Rakultsev V, Gonzalez-Lopez M, Steklikova K, Bartos M, Vijaykumar A, Kaiser J, Pořízka P, Hovorakova M, Mina M, Krivanek J. The Development of Dentin Microstructure Is Controlled by the Type of Adjacent Epithelium. J Bone Miner Res 2022; 37:323-339. [PMID: 34783080 PMCID: PMC9300090 DOI: 10.1002/jbmr.4471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 10/12/2021] [Accepted: 11/08/2021] [Indexed: 11/11/2022]
Abstract
Considerable amount of research has been focused on dentin mineralization, odontoblast differentiation, and their application in dental tissue engineering. However, very little is known about the differential role of functionally and spatially distinct types of dental epithelium during odontoblast development. Here we show morphological and functional differences in dentin located in the crown and roots of mouse molar and analogous parts of continuously growing incisors. Using a reporter (DSPP-cerulean/DMP1-cherry) mouse strain and mice with ectopic enamel (Spry2+/- ;Spry4-/- ), we show that the different microstructure of dentin is initiated in the very beginning of dentin matrix production and is maintained throughout the whole duration of dentin growth. This phenomenon is regulated by the different inductive role of the adjacent epithelium. Thus, based on the type of interacting epithelium, we introduce more generalized terms for two distinct types of dentins: cementum versus enamel-facing dentin. In the odontoblasts, which produce enamel-facing dentin, we identified uniquely expressed genes (Dkk1, Wisp1, and Sall1) that were either absent or downregulated in odontoblasts, which form cementum-facing dentin. This suggests the potential role of Wnt signalling on the dentin structure patterning. Finally, we show the distribution of calcium and magnesium composition in the two developmentally different types of dentins by utilizing spatial element composition analysis (LIBS). Therefore, variations in dentin inner structure and element composition are the outcome of different developmental history initiated from the very beginning of tooth development. Taken together, our results elucidate the different effects of dental epithelium, during crown and root formation on adjacent odontoblasts and the possible role of Wnt signalling which together results in formation of dentin of different quality. © 2021 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Josef Lavicky
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Magdalena Kolouskova
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - David Prochazka
- Advanced Instrumentation and Methods for Materials Characterization, CEITEC Brno University of Technology, Brno, Czech Republic
| | - Vladislav Rakultsev
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Marcos Gonzalez-Lopez
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Klara Steklikova
- Institute of Histology and Embryology, First Faculty of Medicine, Charles University, Prague, Czech Republic.,Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Martin Bartos
- Institute of Dental Medicine, First Faculty of Medicine, Charles University, Prague, Czech Republic.,Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Anushree Vijaykumar
- Department of Craniofacial Sciences School of Dental Medicine, University of Connecticut, Farmington, CT, USA
| | - Jozef Kaiser
- Advanced Instrumentation and Methods for Materials Characterization, CEITEC Brno University of Technology, Brno, Czech Republic
| | - Pavel Pořízka
- Advanced Instrumentation and Methods for Materials Characterization, CEITEC Brno University of Technology, Brno, Czech Republic
| | - Maria Hovorakova
- Institute of Histology and Embryology, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Mina Mina
- Department of Craniofacial Sciences School of Dental Medicine, University of Connecticut, Farmington, CT, USA
| | - Jan Krivanek
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
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