Abnormal expression and function of Fas ligand of lachrymal glands and peripheral blood in Sjögren's syndrome patients with enlarged exocrine glands

K. Tsubota, H. Fujita, K. Tadano, N. Onoda, K. Tsuzaka, T. Takeuchi

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31 Citations (Scopus)

Abstract

The objective of our study was to investigate the possibility of Fas ligand protein abnormalities in certain types of Sjögren's syndrome patients with enlarged exocrine glands. Fas ligand expression by lymphocytes infiltrating the lachrymal glands and by peripheral blood monocytes in Sjögren's syndrome patients with enlarged exocrine glands was assessed immunohistologically and by immunoblotting. Cytotoxicity of peripheral blood monocytes and sensitivity to steroids in Sjögren's syndrome patients with enlarged exocrine glands were studied by functional assay. Minimal Fas ligand expression was detected in the lymphocytes of the lachrymal glands and a decreased level of Fas ligand was found in peripheral blood monocytes as assessed by immunoblotting. Functional assay confirmed the decreased cytotoxicity of lymphocytes in Sjögren's syndrome patients with enlarged exocrine glands, and that it is not affected by anti-Fas ligand antibody. By contrast, the sensitivity of lymphocytes in Sjögren's syndrome patients with enlarged exocrine glands to steroids was increased. These observations suggest that abnormal expression and function of Fas ligand occurs in Sjögren's syndrome patients with enlarged exocrine glands.

Original languageEnglish
Pages (from-to)177-182
Number of pages6
JournalClinical and Experimental Immunology
Volume129
Issue number1
DOIs
Publication statusPublished - 2002 Oct 5

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Keywords

  • Apoptosis
  • Fas
  • Lachrymal gland
  • Salivary gland
  • T cell

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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