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http://dx.doi.org/10.5395/JKACD.2005.30.5.423

EXPRESSION OF OD314 DURING AMELOBLAST DIFFERENTIATION AND MATURATION  

Park, Joo-Cheol (Department of Oral Histology and BK21, School of Dentistry, Chosun University)
Ahn, Seong-Min (Department of Oral Histology and BK21, School of Dentistry, Chosun University)
Kim, Heung-Joong (Department of Oral Histology and BK21, School of Dentistry, Chosun University)
Jeong, Moon-Jin (Department of Oral Histology and BK21, School of Dentistry, Chosun University)
Park, Min-Ju (Department of Oral Histology and BK21, School of Dentistry, Chosun University)
Shin, In-Cheol (Department of Oral Histology and BK21, School of Dentistry, Chosun University)
Son, Ho-Hyun (Department of Conservative Dentistry, School of Dentistry, Seoul National University)
Publication Information
Restorative Dentistry and Endodontics / v.30, no.5, 2005 , pp. 423-430 More about this Journal
Abstract
Ameloblasts are responsible for the formation and maintenance of enamel which is an epithelially derived protective covering for teeth. Ameloblast differentiation is controlled by sequential epithelial-mesenchymal interactions. However, little is known about the differentiation and maturation mechanisms. OD314 was firstly identified from odontoblasts by subtraction between odontoblast/pulp cells and osteoblast/dental papilla cells, even though OD314 protein was also expressed in ameloblast during tooth formation. In this study, to better understand the biological function of OD314 during amelogenesis, we examined expression of the OD314 mRNA and protein in various stages of ameloblast differentiation using in-situ hybridization and immunohistochemistry. The results were as follows : 1. The ameloblast showed 4 main morphological and functional stages referred to as the presecretory, secretory, smooth-ended, and ruffle-ended. 2. OD314 mRNA was expressed in secretory ameloblast and increased according to the maturation of the cells. 3. OD314 protein was not expressed in presecretory ameloblast but expressed in secretory ameloblast and maturative ameloblast. OD314 protein was distributed in entire cytoplasm of secretory ameloblast. However, OD314 was localized at the proxiamal and distal portion of the cytoplasm of smooth-ended and ruffle-ended ameloblast. These results suggest that OD314 may play important roles in the ameloblast differentiation and maturation.
Keywords
Ameloblast; OD314; Differentiation; Maturation; Smooth-ended; Ruffle; ended;
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