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Relationship of precipitating antibodies to soluble cellular antigens and histologically defined renal lesions in systemic lupus erythematosus.
  1. P J Venables,
  2. T Yi,
  3. D F Woodrow,
  4. J Moss,
  5. R N Maini

    Abstract

    Antibodies to nuclear ribonucleoprotein (nRNP), Sm, SS-A, and SS-B, were studied by a quantitative immunodiffusion technique in 48 patients with systemic lupus erythematosus (SLE). There was no correlation between the presence or titre of antibodies to any of these antigens and clinically apparent renal disease. However, among 34 patients who had renal biopsies antibodies to nRNP, Sm, and/or SS-A were seen in all 8 patients with membranous glomerulonephritis. Low-titre antibodies (less than 1:4) were seen in 3 out of 7 patients with diffuse proliferative glomerulonephritis. Longitudinal studies in 4 patients who had serial biopsies indicated that the association between serological and histological findings was maintained for prolonged periods. In 2 patients whose biopsy pattern changed, antibodies to nRNP, Sm, and SS-A antedated the development of membranous nephritis.

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