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Early impairment of glucose tolerance and β-cell function in obese children

Piotr Fichna1, Bogda Skowrońska, Katarzyna Majewska

  • 1Department of Pediatric Diabetes and Obesity, Poznan University of Medical Sciences, Poland. pfichna@ump.edu.pl

Pediatric Endocrinology, Diabetes, and Metabolism
|March 31, 2011
PubMed

Insights

Wolfram syndrome patients exhibit distinct HLA antigen profiles and lack diabetes-related autoantibodies, suggesting a non-autoimmune cause for beta-cell destruction. This contrasts with type 1 diabetes, highlighting unique genetic factors in Wolfram syndrome.

Area of Science:

  • Endocrinology
  • Immunogenetics
  • Genetics

Background:

  • Wolfram syndrome is characterized by diabetes and optic atrophy before age 15.
  • Diabetes in Wolfram syndrome results from selective beta-cell loss with a likely non-autoimmune pathogenesis.
  • Understanding the genetic and autoimmune factors is crucial for differentiating Wolfram syndrome from other forms of diabetes.

Purpose of the Study:

  • To evaluate Human Leukocyte Antigen (HLA) subtypes in patients with molecularly confirmed Wolfram syndrome.
  • To assess the presence of beta-cell autoantibodies in these patients.
  • To compare genetic and autoimmune markers with type 1 diabetes patients.

Main Methods:

  • Studied 9 patients with Wolfram syndrome (ages 10-24) and compared them to 218 type 1 diabetes patients and 176 healthy controls.
  • Performed HLA typing using Polymerase Chain Reaction Sequence-Specific Oligonucleotide (PCR-SSO) probes.
  • Detected islet cell antibodies (ICA), glutamic acid decarboxylase antibodies (GADA), tyrosine phosphatase antibodies (IA2A), and insulin antibodies (IAA).

Main Results:

  • Wolfram syndrome patients were diagnosed with diabetes at a significantly younger age (median 5.0 years) compared to type 1 diabetes patients (median 10.4 years).
  • Increased prevalence of HLA-DQw1, DRB1*03/04, and DR2 alleles was observed in Wolfram syndrome patients.
  • Significantly higher frequencies of DRB1*1501 and DQB1*06 alleles were found in Wolfram syndrome patients compared to type 1 diabetes patients.

Conclusions:

  • Polish patients with Wolfram syndrome possess a distinct HLA antigen profile, including DR2, DQw1, and DRB3/4 alleles.
  • Absence of diabetes-related autoantibodies in these patients supports the hypothesis of non-autoimmune beta-cell destruction.
  • These findings aid in distinguishing Wolfram syndrome from autoimmune diabetes.
Abstract

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