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Alpha v beta 3 integrin expression in human odontoblasts and co-localization with osteoadherin.
M Lucchini1, M-L Couble, A Romeas
1Laboratory of Development of Dental Tissues, EA 1892, IFR 62, Faculty of Odontology, Lyon 1 University, G. Paradin Str., 69372 Lyon Cedex 08, France.
Journal of Dental Research
|June 26, 2004
Summary
Alpha v beta 3 integrin is present in human tooth pulp cells called odontoblasts. This finding suggests its role in cell adhesion within the tooth's dentin and pulp matrix.
Area of Science:
- Oral biology
- Cell biology
- Integrin signaling
Background:
- Integrins are crucial for cell adhesion and tissue organization.
- Understanding odontoblast interactions is key to dental tissue maintenance.
Purpose of the Study:
- To investigate the expression and localization of alpha v beta 3 integrin in human dental pulp.
- To explore the potential role of alpha v beta 3 integrin in odontoblast interactions with the extracellular matrix.
Main Methods:
- Immunohistochemical analysis of human dental pulp tissue (sound and carious).
- Immunocytochemical staining of differentiating odontoblasts in vitro.
- Antibody staining for alpha v beta 3 integrin and osteoadherin.
Main Results:
- Alpha v beta 3 integrin expression was observed in odontoblasts, blood vessels, and small rounded cells within the pulp.
- Staining intensity of alpha v beta 3 integrin in odontoblasts increased from apical to cusp regions.
- Osteoadherin staining was prominent in the odontoblast layer and predentin.
- In vitro, differentiating odontoblasts showed progressive alpha v beta 3 integrin staining on their cell membranes.
Conclusions:
- Alpha v beta 3 integrin is expressed by odontoblasts in human teeth.
- This integrin may mediate cell adhesion between odontoblasts and contribute to their binding to the surrounding matrix, potentially via osteoadherin.