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. 1988 Jan;81(1):106–109. doi: 10.1172/JCI113280

Autoantibodies to the heat-shock protein hsp90 in systemic lupus erythematosus.

S Minota 1, S Koyasu 1, I Yahara 1, J Winfield 1
PMCID: PMC442480  PMID: 3335628

Abstract

Patients with systemic lupus erythematosus (SLE) develop multiple autoantibodies to self-antigens. Analysis of autoantibody systems in this and related autoimmune disorders can provide information of etiologic and pathogenetic significance. We report here a previously unrecognized autoantibody to the 90,000-D heat-shock protein, hsp90, a molecule thought to have important functions in the cellular response to stress, virus-induced transformation, steroid hormone receptor action, and cellular activation. Autoantibodies to hsp90 were exclusively of the IgG class, and were detected in approximately 50% of unselected patients with SLE and 2/6 patients with idiopathic polymyositis. Anti-hsp90 antibodies were not detected in sera from 10 normal subjects, 10 patients with rheumatoid arthritis, or 7 patients with scleroderma. The identity of this major intracytoplasmic antigen was established by its specific removal from nonionic detergent cell lysates following immunoabsorption with monospecific rabbit anti-hsp90, and by demonstration of increased synthesis following a 10-min 45 degrees C heat shock. These data define the frequent occurrence of a novel autoantibody to a major heat-shock protein in patients with SLE.

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Selected References

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