Distribution of immunoglobulin isotypes including IgA subclasses in adult, juvenile, and rapidly progressive periodontitis

Academic Article


  • Abstract The plasma cell population in gingival biopsies from 3 groups of patients with adult, juvenile, and rapidly progressive periodontitis was characterized with respect to the distribution of individual immunoglobulin isotypes. including IgA subclasses, by paired immunofluorescence staining. The median ratios of TgG:IgA plasma cells in gingival connective tissue from the 3 groups were 2.7 (range 2.0‐6.5), 3.0 (1.4‐6.2), and 2.0 (1.2‐4.0), respectively. Cells staining for intracellular IgM were found in low numbers in all biopsies (range 0.3–6.3% of all plasma cells). No statistically significant differences were observed between the 3 patient groups. In all 3 groups, the IgA plasma cell population was predominantly of the IgAI isotype. One function of IgA seems to be to dampen inflammatory side‐effects of other immune effector systems. The demonstrated predominance of IgAI plasma cells indicates that the majority of IgA produced locally in gingivae of patients with periodontal diseases is susceptible to the IgAI‐specific proteases excreted by important members of the disease‐associated subgingival microflora. This may be an important factor in the apparently uncontrolled inflammation and tissue degradation taking place in the marginal periodontium during active periodontal disease. Copyright © 1989, Wiley Blackwell. All rights reserved
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    Author List

  • Kilian M; Ellegaard B; Mestecky J
  • Start Page

  • 179
  • End Page

  • 184
  • Volume

  • 16
  • Issue

  • 3