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Advances in Dental Research
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Adv Dent Res 15:30-33, August, 2001
© 2001 SAGE Publications

New Genes Involved in Odontoblast Differentiation

F. Bleicher

Lab. du Developpement des Tissus Dentaires, EAI892, Faculté d'Odontologie, UCBL, Rue G. Paradin, 69372 Lyon Cedex 08, France, bleicher{at}laennec.univ-lyon I .fr

M.L. Couble

Lab. du Developpement des Tissus Dentaires, EAI892, Faculté d'Odontologie, UCBL, Rue G. Paradin, 69372 Lyon Cedex 08, France

R. Buchaille

Lab. du Developpement des Tissus Dentaires, EAI892, Faculté d'Odontologie, UCBL, Rue G. Paradin, 69372 Lyon Cedex 08, France

J.C. Farges

Lab. du Developpement des Tissus Dentaires, EAI892, Faculté d'Odontologie, UCBL, Rue G. Paradin, 69372 Lyon Cedex 08, France

H. Magloire

Lab. du Developpement des Tissus Dentaires, EAI892, Faculté d'Odontologie, UCBL, Rue G. Paradin, 69372 Lyon Cedex 08, France

The odontoblast phenotype has been mainly approached by the biochemical characterization of dentin matrix proteins and by extrapolation of the knowledge of bone cell biology, since dentin and bone share many similarities. In fact, direct investigations of the odontoblast phenotype have been hindered by the limited number of cells within the dental pulp and the difficulty in microdissection and isolation of a pure population of these cells. To overcome these obstacles, we previously developed a cell-culture system that promotes differentiation of human dental pulp cells into odontoblasts. This material now permits the study of odontoblasts through molecular biology techniques. Therefore, we constructed a cDNA library enriched for odontoblast-specific genes using the suppression subtractive hybridization technique (SSH). This library led us to identify new genes expressed by odontoblasts. In this paper, we will focus on some genes implied in various functions associated with odontoblast differentiation, such as cell polarization (MAP1B), dentin mineralization (PHEX, osteoadherin), and relationships between odontoblasts and nerve cells (reelin). Another important fact is that about 40% of the cDNA were unknown genes. Therefore, one can speculate that some of them will be odontoblast-specific, since, until now, only one gene (DSPP) presents this characteristic.

Key Words: Odontoblast • reelin • MAPIB • PHEX • osteoadherin.

Advances in Dental Research, Vol. 15, No. 1, 30-33 (2001)
DOI: 10.1177/08959374010150010701
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