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Related Experiment Videos

Predicting insulin-dependent diabetes.

A C Tarn1, J M Thomas, B M Dean

  • 1Department of Diabetes and Immunogenetics, St. Bartholomew's Hospital, London.

Lancet (London, England)
|April 16, 1988
PubMed
Summary
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Human leukocyte antigen (HLA) sharing and islet-cell antibodies (ICA) can predict insulin-dependent diabetes (IDDM) risk in relatives of diabetic children. High-risk individuals may benefit from early monitoring and intervention strategies.

Area of Science:

  • Immunogenetics
  • Endocrinology
  • Pediatrics

Background:

  • Insulin-dependent diabetes (IDDM) has a significant genetic component.
  • Early identification of at-risk individuals is crucial for potential interventions.

Purpose of the Study:

  • To evaluate the predictive value of Human Leukocyte Antigen (HLA) haplotype sharing and islet-cell antibodies (ICA) for the development of IDDM.
  • To assess the risk of IDDM in first-degree relatives of children diagnosed with diabetes.

Main Methods:

  • Prospective follow-up study of 719 first-degree relatives of diabetic children.
  • Assessment of HLA haplotype sharing between relatives and probands.
  • Detection and quantification of islet-cell antibodies (ICA) in serum samples.

Related Experiment Videos

Main Results:

  • 16 out of 719 relatives developed IDDM within 8 years.
  • Cumulative risk by age 25 was 16% for siblings sharing two HLA haplotypes, 9% for one, and 0% for none.
  • 54% of subjects with complement-fixing ICA became insulin-dependent, compared to 0.3% of ICA-negative subjects. Relative risk for ICA-positive individuals was 75.2.

Conclusions:

  • HLA haplotype sharing and ICA status are significant predictors of IDDM risk in first-degree relatives.
  • Complement-fixing ICA positivity indicates a substantially elevated risk for developing IDDM.
  • These markers can aid in identifying high-risk individuals for targeted monitoring.