Antiislet autoantibodies usually develop sequentially rather than simultaneously

The Journal of Clinical Endocrinology and Metabolism
L YuGeorge S Eisenbarth

Abstract

The goal of this study was to address whether antiislet autoantibodies appear sequentially or simultaneously before the onset of type I diabetes. We analyzed sequential serum samples from 155 siblings and offspring (aged < 7 yr) of patients with type I diabetes from the Denver Diabetes Autoimmunity Study in the Young study and from a separate group of first degree relatives (aged 2-40 yr) for autoantibodies reacting with three defined autoantigens: glutamic acid decarboxylase (GAD65), insulin, and ICA512/IA-2. The youngest age at which 1 of the 3 autoantibodies appeared was 1.1 yr, and the oldest was 60.9 yr. Of the total 26 autoantibody conversion events observed, in only 3 instances did more than 1 autoantibody appear simultaneously. Among individuals (n = 12) with sequential conversion to expression of multiple autoantibodies, anti-GAD65 autoantibodies or antiinsulin autoantibodies appeared first (4 expressed antiinsulin autoantibodies first, and 8 anti-GAD65 autoantibodies first). We conclude that antiislet autoantibodies usually appear sequentially and not simultaneously. This corroborates early suggestions that humoral autoimmunity to islets develops chronically in a process usually measured in months to years. As express...Continue Reading

Citations

Feb 11, 2004·Proceedings of the National Academy of Sciences of the United States of America·Christian SieboldLars Fugger
Mar 4, 2000·Proceedings of the National Academy of Sciences of the United States of America·L YuG S Eisenbarth
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