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No evidence for serological autoimmunity to islet cell heat shock proteins in insulin dependent diabetes.
M A Atkinson, … , P E Lacy, N K Maclaren
M A Atkinson, … , P E Lacy, N K Maclaren
Published February 1, 1991
Citation Information: J Clin Invest. 1991;87(2):721-724. https://doi.org/10.1172/JCI115051.
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Research Article

No evidence for serological autoimmunity to islet cell heat shock proteins in insulin dependent diabetes.

Abstract

Recent studies in nonobese diabetic mice have implicated the autoimmune destruction of pancreatic islet cells with immunity to a beta cell protein cross-reactive to Mycobacterium tuberculosis heat shock protein 65 (hsp 65). Therefore, our studies examined serological immunity to islet cell hsp in humans with insulin-dependent diabetes (IDD). Heat shock of human islet cells in vitro markedly increased the synthesis of proteins of 72,000, 75,000, and 90,000 Mr. No autoantibodies reactive to these hsp, nor to the constituently expressed islet cell hsp 65 protein (identified as 60,000 Mr) were observed in IDD patients. The islet cell 64,000-Mr autoantigen and hsp 65 proteins were physiologically and immunocompetitively distinct. These experiments do not support the hypothesis that IDD in humans is associated with autoimmunity to islet cell heat shock proteins.

Authors

M A Atkinson, L A Holmes, D W Scharp, P E Lacy, N K Maclaren

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