Nuclear BCL10 in primary Sjögren's syndrome

Margaret K Gatumu, Malin V Jonsson, Gunnvor Øijordsbakken, Kathrine Skarstein

Research output: Contribution to journalArticle (Academic Journal)

2 Citations (Scopus)

Abstract

BACKGROUND: The events following triggering of antigen receptors and subsequent activation of the transcription factor nuclear factor kappa B (NFkappaB) need to be carefully controlled to prevent abnormal immune responses. BCL10 links the antigen receptor to NFkappaB. The aim of this study was to determine the expression pattern of BCL10 and NFkappaB in minor salivary gland infiltrates of patients with primary Sjögren's syndrome (pSS).

METHODS: Minor salivary glands from patients with primary SS (n = 17) and sicca controls (n = 4) were evaluated by single and double immunohistochemistry and immunofluorescence for confocal microscopy. BCL10 and NFkappaB-p65 expression were evaluated in the infiltrating lymphocytes. Ectopic germinal centers (GCs) were investigated by CD21. Tonsil, lymph node and lymphoma tissue were used as positive controls.

RESULTS: BCL10 nuclear positive cells were observed in focal lymphocytic infiltrates in the investigated minor salivary glands and were not restricted to patients with ectopic GCs. By double-staining, some of the BCL10 nuclear positive cells were identified as B cells. There was, however, no constitutive activation of NFkappaB as depicted by the exclusive cytoplasmic expression of p65 in the infiltrating lymphocytes in the pSS.

CONCLUSION: Nuclear expression of BCL10 in infiltrating lymphocytes was a common occurrence in pSS minor salivary glands indicating it as a possible marker of autoimmune induced chronic inflammation. There was, however, no constitutive activation of NFkappaB.

Original languageEnglish
Pages (from-to)501-7
Number of pages7
JournalJournal of Oral Pathology and Medicine
Volume38
Issue number6
DOIs
Publication statusPublished - Jul 2009

Keywords

  • Adaptor Proteins, Signal Transducing
  • Adult
  • Aged
  • Antibodies, Antinuclear
  • B-Lymphocytes
  • Biological Markers
  • Cell Nucleus
  • Female
  • Fluorescent Antibody Technique
  • Humans
  • Immunohistochemistry
  • Lymphocytes
  • Male
  • Microscopy, Confocal
  • Middle Aged
  • NF-kappa B
  • Receptors, Complement 3d
  • Salivary Glands, Minor
  • Sjogren's Syndrome
  • Transcription Factor RelA
  • Xerostomia
  • Young Adult

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  • Cite this

    Gatumu, M. K., Jonsson, M. V., Øijordsbakken, G., & Skarstein, K. (2009). Nuclear BCL10 in primary Sjögren's syndrome. Journal of Oral Pathology and Medicine, 38(6), 501-7. https://doi.org/10.1111/j.1600-0714.2009.00757.x