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Related Experiment Videos

Can we predict and/or prevent type I diabetes?

M Sandler1

  • 1Department of Internal Medicine, University of Stellenbosch, Parowvallei, CP.

South African Medical Journal = Suid-Afrikaanse Tydskrif Vir Geneeskunde
|October 20, 1990
PubMed
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First-degree relatives have a higher risk of developing type 1 diabetes. Key predictors include genetic markers like HLA DQ beta Asp 57 negativity and auto-antibodies such as islet cell antibodies (ICA) and insulin auto-antibodies (IAA).

Area of Science:

  • Immunology
  • Endocrinology
  • Genetics

Background:

  • First-degree relatives of individuals with type 1 diabetes have an elevated risk.
  • Genetic and autoimmune markers are crucial for predicting disease development.

Purpose of the Study:

  • To identify key genetic and autoimmune markers for predicting type 1 diabetes (T1D).
  • To evaluate the predictive value of various biomarkers for preclinical and impending T1D.

Main Methods:

  • Analysis of genetic markers, including HLA alleles (DR3/DR4) and HLA DQ beta gene variants.
  • Detection of auto-antibodies: islet cell antibodies (ICA), insulin auto-antibodies (IAA), and antibodies to a 64K islet membrane protein.
  • Assessment of insulin secretion response to intravenous glucose challenge.

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Main Results:

  • HLA DQ beta Asp 57 negativity and specific HLA alleles are associated with T1D risk.
  • High titers of ICA, IAA (especially in combination), and 64K antibodies are significant predictors of preclinical T1D.
  • Declining first-phase insulin secretion predicts T1D onset within 18 months.

Conclusions:

  • A combination of genetic and autoimmune markers, particularly 64K antibodies, offers strong predictive potential for T1D.
  • Early identification of at-risk individuals can be achieved through these predictive markers.
  • Current immunotherapies like azathioprine show limited efficacy in maintaining remission.