Elevated Level of Soluble HLA Class I Antigens in Serum and Bronchoalveolar Lavage Fluid in Patients with Sarcoidosis.

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  • OGISU Nobuo
    the Second Department of Internal Medicine, Nagoya City University, Medical School
  • SATO Shigeki
    the Second Department of Internal Medicine, Nagoya City University, Medical School
  • KAWAGUCHI Haruhiko
    the Second Department of Internal Medicine, Nagoya City University, Medical School
  • SUGIURA Yoshiki
    the Second Department of Internal Medicine, Nagoya City University, Medical School
  • MORI Toshiyuki
    the Second Department of Internal Medicine, Nagoya City University, Medical School
  • NIIMI Takashi
    the Second Department of Internal Medicine, Nagoya City University, Medical School
  • MAEDA Hiroyoshi
    the Second Department of Internal Medicine, Nagoya City University, Medical School
  • AKITA Kenji
    the Second Department of Internal Medicine, Nagoya City University, Medical School
  • YAMADA Yuka
    the Second Department of Internal Medicine, Nagoya City University, Medical School
  • UEDA Ryuzo
    the Second Department of Internal Medicine, Nagoya City University, Medical School

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  • Elevated Level of Soluble HLA Class 1 Antigens in Serum and Bronchoalveolar Lavage Fluid in Patients with Sarcoidosis

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Objective Soluble HLA class I antigens (sHLAs) in human serum have been reported to be associated with allografts and autoimmune disease and could modify immunological reactions induced by membrane type HLAs. To investigate the clinical significance of sHLAs in sarcoidosis, we assessed concentrations of sHLAs in both serum and bronchoalveolar lavage fluid (BALF) and also examined their production by peripheral blood mononuclear cells (PBMCs) and BALF cells.<br> Methods Concentrations of sHLAs were determined by enzyme-linked immunosorbent assay, using a monoclonal antibody against HLA class I (W6/32) and an enzyme-labeled polyclonal antibody to human β2-microglobulin. PBMCs and BALF cells were cultured in the presence or absence of either LPS or PHA.<br> Patients Serum levels of sHLAs were assessed in 96 patients with sarcoidosis and in 32 healthy control subjects. sHLAs concentrations in BALF were also investigated in 17 active sarcoidosis patients and in 13 control subjects.<br> Results sHLAs levels in both serum and BALF were higher in sarcoidosis cases than in control subjects (p<0.05, in both). In the patients, values were significantly higher in active than in inactive stages (p<0.001) and significantly correlated with angiotensin-converting enzyme (ACE) levels. Both PBMCs and BALF cells produced enhanced amounts of sHLAs in patients with active sarcoidosis compared with those in control subjects.<br> Conclusion These results demonstrated that the level of sHLAs in serum is a useful index of disease activity of sarcoidosis, partly reflecting production by PBMCs and BALF cells.<br>(Internal Medicine 40: 201-207, 2001)

Journal

  • Internal Medicine

    Internal Medicine 40 (3), 201-207, 2001

    The Japanese Society of Internal Medicine

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