Immunohistochemical analysis of CD1a-labeled Langerhans cells in human dental periapical inflammatory lesions - Correlation with inflammatory cells and epithelial cells

T. Suzuki, H. Kumamoto, K. Ooya, K. Motegi

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

OBJECTIVE: Distribution and density of CD1a-labeled Langerhans cells (LCs) were examined in human dental periapical inflammatory lesions, and compared with inflammatory cell infiltration or epithelial cell proliferation. MATERIALS AND METHODS: Eighty three periapical lesions (26 apical granulomas (AGs), 8 epitheliated granulomas (EGs), 34 radicular cysts (RCs), 15 residual radicular cysts (RRCs)) were collected. As control, specimens of periodontal ligaments including Malassez epithelial rests were curetted from 21 teeth. LC densities were measured and various degrees of inflammatory cell infiltration were examined immunohistochemically. Labeling indices for the cellular proliferation markers Ki-67 antigen and DNA topoisomerase 11 α were calculated in the epithelial components. RESULTS: LCs were found in all periapical lesions but not in Malassez epithelial rests. LCs were more abundant in epithelial components than in subepithelial layers. Intraepithelial LCs were more frequent in RCs than in RRCs, whereas subepithelial LCs were less frequent in RRCs than in AGs and EGs. T lymphocytes consistently outnumbered macrophages, plasma cells and B lymphocytes. The range of the CD4/CD8-positive cell ratio differed according to the lesions. Increased LC density was associated with the severity of CD3-positive cell infiltration. Ki-67- and Topo 11 - L1 showed various degrees of epithelial immunoreactivity. There was a significant correlation between LC density and proliferative potential of the epithelium in periapical lesions. CONCLUSION: These findings suggested that LCs appeared to be associated with T lymphocyte infiltration and proliferative potential of the epithelial tissue in periapical lesions.

Original languageEnglish
Pages (from-to)336-343
Number of pages8
JournalOral Diseases
Volume7
Issue number6
DOIs
Publication statusPublished - 2001

Keywords

  • CD1a
  • Epithelial proliferation
  • Immunohistochemistry
  • Inflammatory cell
  • Langerhans cell
  • Periapical lesion

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Dentistry(all)

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