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Related Experiment Videos

Cellular adhesion molecules on periodontal lymphocytes

E Gemmell1, A M Sved, G J Seymour

  • 1Department of Dentistry, University of Queensland.

Australian Dental Journal
|April 1, 1995
PubMed
Summary

Gingival T and B cells express key adhesion molecules involved in cell interactions. Bacterial stimulation altered adhesion molecule expression differently in gingival cells versus peripheral blood cells.

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Area of Science:

  • Immunology
  • Oral Microbiology

Background:

  • T cell-B cell differentiation relies on CD2/LFA-3 and LFA-1/ICAM-1 pathways.
  • Periodontopathic bacteria like Porphyromonas gingivalis and Fusobacterium nucleatum are implicated in gum disease.

Purpose of the Study:

  • To investigate the expression of adhesion molecules on T and B cells from gingival tissues.
  • To compare gingival immune cell adhesion molecule expression with peripheral blood cells.
  • To assess the impact of specific bacteria on these adhesion molecules.

Main Methods:

  • Flow cytometry was used to analyze T and B cells from gingival tissues and peripheral blood.
  • Cells were stimulated in vitro with P. gingivalis and F. nucleatum.
  • Expression of CD2, LFA-3, LFA-1, and ICAM-1 was quantified.

Main Results:

  • Gingival B cells showed higher expression of LFA-3 and ICAM-1 compared to peripheral blood B cells.
  • Gingival T cells had lower CD2 expression but similar LFA-1 expression compared to peripheral blood T cells.
  • Bacterial stimulation differentially affected adhesion molecule expression in gingival versus peripheral blood cells.

Conclusions:

  • Gingival T and B cells express adhesion molecules in vivo, crucial for immune responses in the gingiva.
  • The response of gingival immune cells to bacterial stimulation differs from peripheral blood cells.
  • These findings contribute to understanding immune cell dynamics in periodontal disease.

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