alexa HSP 10 is a new autoantigen in both autoimmune pancreatitis and fulminant type 1 diabetes.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Genetic Syndromes & Gene Therapy

Author(s): Takizawa S, Endo T, Wanjia X, Tanaka S, Takahashi M,

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Abstract To search autoantigens in autoimmune pancreatitis (AIP), we have screened the human pancreas cDNA library with a patient's serum and obtained 10 positive clones. Seven out of 10 clones were amylase alpha-2A, the autoantibody to which was specifically detected in sera from patients with AIP and fulminant type 1 diabetes (FT1DM) [T. Endo, S. Takizawa, S. Tanaka, M. Takahashi, H. Fujii, T. Kamisawa, T. Kobayashi, Amylase alpha-2A autoantibodies: novel marker of autoimmune pancreatitis and fulminant type 1 diabetes mellitus, Diabetes 58 (2009) 732-737]. Sequencing of 1 out of remaining 3 positive clones revealed that it was identical to heat shock protein 10 (HSP 10) cDNA. Using a recombinant HSP 10, we have developed enzyme-linked immunosorbent assay (ELISA) system for detecting autoantibodies against HSP 10. We found that autoantibody against HSP 10 was also produced with high frequency in sera from patients with AIP (92\%) and FT1DM (81\%), but not in chronic alcoholic pancreatitis (8\%) or healthy volunteers (1.4\%). These results suggest that an autoantibody against HSP 10 is also a new diagnostic marker for both AIP and FT1DM. This article was published in Biochem Biophys Res Commun and referenced in Journal of Genetic Syndromes & Gene Therapy

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