Dental Journal (Majalah Kedokteran Gigi)
ISSN 1978-3728
Vol. 45 / No. 3 / Published : 2012-09
Order : 3, and page :133 - 137
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Original Article :
Distribution of class ii major histocompatibility complex antigen-expressing cells in human dental pulp with carious lesions
Author :
- Tetiana Haniastuti ia*1
- Department of Oral Biology Faculty of Dentistry, Gadjah Mada Universitas, Yogyakarta - Indones
Abstract :
Background: Dental caries is a bacterial infection which causes destruction of the hard tissues of the tooth. Exposure of thedentin to the oral environment as a result of caries inevitably results in a cellular response in the pulp. The major histocompatibilitycomplex (MHC) is a group of genes that code for cell-surface histocompatibility antigens. Cells expressing class II MHC moleculesparticipate in the initial recognition and the processing of antigenic substances to serve as antigen-presenting cells. Purpose: The aimof the study was to elucidate the alteration in the distribution of class II MHC antigen-expressing cells in human dental pulp as cariouslesions progressed toward the pulp. Methods: Fifteen third molars with caries at the occlusal site at various stages of decay and 5intact third molars were extracted and used in this study. Before decalcifying with 10% EDTA solution (pH 7.4), all the samples wereobserved by micro-computed tomography to confirm the lesion condition three-dimensionally. The specimens were then processed forcryosection and immunohistochemistry using an anti-MHC class II monoclonal antibody. Results: Class II MHC antigen-expressingcells were found both in normal and carious specimens. In normal tooth, the class II MHC-immunopositive cells were observed mainlyat the periphery of the pulp tissue. In teeth with caries, class II MHC-immunopositive cells were located predominantly subjacent tothe carious lesions. As the caries progressed, the number of class II MHC antigen-expressing cells was increased. Conclusion: Thedepth of carious lesions affects the distribution of class II MHC antigen-expressing cells in the dental pulp.
Keyword :
Class II major histocompatibility complex, dental pulp, caries,
References :
Marsh PD,(2008) The oral microflora and biofilms on teeth Oxford : Blackwell Munksgaard;
Archive Article
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Volume : 45 / No. : 3 / Pub. : 2012-09 |
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