alexa Antibodies to glutamic acid decarboxylase in the prediction of insulin dependency.


Journal of Clinical & Cellular Immunology

Author(s): Zimmet P

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Abstract Antibodies to glutamic acid decarboxylase (anti-GAD) predict the progression of adults masquerading as NIDDM to insulin dependency and predict the eventual occurrence of IDDM in healthy pregnant women in Finland. Almost 80\% of prediabetic and newly diagnosed IDDM cases are positive for anti-GAD. However, approximately 20\% of these groups do not have a humoral response to GAD so it cannot be claimed that anti-GAD is the exclusive autoimmune phenomenon. Nevertheless, 94\% of children with newly diagnosed IDDM that we studied had an autoimmune response to either GAD, ICA or IAA, singly or in combination. The anti-GAD assay also has a substantial role in the diagnosis and classification of diabetes presenting in adult life since a proportion of adults who present with apparent NIDDM actually have a slowly evolving autoimmune insulitis, a condition we have called latent autoimmune diabetes in adults (LADA). It appears likely that anti-GAD will be predictive for IDDM in both first degree relatives and the general population. As a result of the cost and relative ease of performance, it will provide a practical alternative to ICA, particularly in population screening. Comparisons of testing for anti-GAD and ICA as predictors of IDDM using large population groups are now in progress in our laboratory.
This article was published in Diabetes Res Clin Pract and referenced in Journal of Clinical & Cellular Immunology

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