The comparison in double immunodiffusion and western blotting methods of anti-SS-A/B antibodies in patients with Sjoegren's syndrome

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  • Xu Zhiquan
    Department of Internal Medicine and Rheumatology, Juntendo University School of Medicine
  • Takeuchi Ken
    Department of Internal Medicine and Rheumatology, Juntendo University School of Medicine
  • Matsudaira Ran
    Department of Internal Medicine and Rheumatology, Juntendo University School of Medicine
  • Kanai Yoshinori
    Department of Internal Medicine and Rheumatology, Juntendo University School of Medicine
  • Tokano Yoshiaki
    Department of Internal Medicine and Rheumatology, Juntendo University School of Medicine
  • Takasaki Yoshinari
    Department of Internal Medicine and Rheumatology, Juntendo University School of Medicine
  • Hashimoto Hiroshi
    Department of Internal Medicine and Rheumatology, Juntendo University School of Medicine

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  • シェーグレン症候群における抗ＳＳ‐Ａ／Ｂ抗体の二重免疫拡散法，ウェスタンブロット法の比較検討

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Objective: To investigate the autoimmune responses against SS-A/B antigens by double immunodiffusion (DID) and western blotting (WB) in primary and secondary Sjögren's syndrome (SS).<br> Patients: Forty-nine patients with primary SS (PSS), 28 patients with secondary SS (SSS) and control group that couldn't be diagnosed as SS were included in this study.<br> Results: In DID analysis, Anti-SS-A antibody was detected in 69% of PSS and 86% of SSS, and anti-SS-B antibody was found in 22% of PSS and 39% of SSS. No significant difference could be demonstrated between PSS and SSS concerning anti-SS-A/B antibodies. Conversely, WB studies disclosed evidences that 18% of PSS and no SSS reacted only with the 52 kD protein, and there was significantly increased in PSS. Sera reacting with the 60 kD antigen were found in 37% of PSS, 71% of SSS, and 75% of SSS with SLE, 63% of SSS with RA. The ratio of SSS, and SSS with SLE were particularly significantly higher than PSS.<br> Conclusion: Our results revealed data that there are the difference of reactivity against SS-A/B antigens in WB between PSS and SSS.

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