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Immunolocalisation of collagens in the developing rat molar tooth
P P Webb1, B J Moxham, J R Ralphs
1Anatomy Unit, School of Molecular and Medical Biosciences, University of Wales, Cardiff, UK.
European Journal of Oral Sciences
|April 16, 1998
Summary
This study maps collagen types during rat tooth development, revealing unexpected locations in the enamel organ. Collagen patterns in the periodontal ligament and pulp remain stable throughout aging.
Area of Science:
- Oral Biology
- Developmental Biology
- Biochemistry
Background:
- Collagens are crucial structural proteins in tooth development and maintenance.
- Understanding collagen distribution is key to comprehending tooth tissue formation and aging.
Purpose of the Study:
- To identify and localize various collagen types (I, II, III, IV, VI, IX, X) during rat molar development, maturation, and aging.
- To investigate the expression patterns of fibronectin and laminin in tooth tissues.
Main Methods:
- Immunohistochemistry was employed on rat first molar tissues across a wide age range (embryonic day 14 to 104 weeks postnatally).
- A panel of monoclonal and polyclonal antibodies was used to detect specific collagen types, fibronectin, and laminin.
Main Results:
- Collagen types I and III were consistently found in the dental papilla and unexpectedly in the stellate reticulum.
- Transient expression of type II collagen was noted in the stellate reticulum during the late bell stage.
- Types IV and VI collagens, laminin, and fibronectin localized to basement membranes; types I and III were present in the developing follicle/periodontal ligament, with type III prominent at insertion sites.
Conclusions:
- The study identified unique collagen localizations within the tooth germ, particularly in the stellate reticulum.
- Collagen expression patterns in the periodontal ligament and dental pulp showed stability with age.
- These findings contribute to a deeper understanding of tooth tissue development and structural organization.