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Juvenile arthritis: genetic update

E D Albert1, S Scholz

  • 1Labor für Immungenetik, Kinderpoliklinik der LMU, München, Germany.

Bailliere'S Clinical Rheumatology
|January 16, 1999
PubMed
Summary

Juvenile arthritis (JA) involves distinct subtypes with specific Human Leukocyte Antigen (HLA) associations. HLA typing is not crucial for diagnosing or predicting the prognosis of JA.

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Area of Science:

  • Immunogenetics
  • Rheumatology
  • Pediatric Autoimmunity

Background:

  • Juvenile arthritis (JA) encompasses various conditions, with only three subtypes showing significant Human Leukocyte Antigen (HLA) associations.
  • Specific HLA alleles are linked to distinct JA presentations, influencing disease characteristics and potential pathogenesis.

Purpose of the Study:

  • To investigate the Human Leukocyte Antigen (HLA) associations in different subtypes of juvenile arthritis (JA).
  • To explore the potential role of HLA molecules in the immunopathogenesis of JA.

Main Methods:

  • Analysis of Human Leukocyte Antigen (HLA) associations across different juvenile arthritis (JA) subtypes.
  • Review of existing data on HLA allele correlations with disease onset, gender, and clinical features.

Main Results:

  • Pauciarticular JA with late onset (male-predominant) associates with HLA-B27, linked to juvenile spondyloarthropathies.
  • Early onset pauciarticular JA (female-predominant) shows associations with HLA-A2, DR8, DR11, DR12, DQA1 alleles, and DPB1*0201.
  • Polyarticular JA (rheumatoid factor positive) associates with DR4, similar to adult rheumatoid arthritis.

Conclusions:

  • Specific HLA alleles are strongly associated with distinct juvenile arthritis (JA) subtypes.
  • The presentation of arthritogenic peptides by HLA molecules, particularly DQ molecules, is implicated in JA pathogenesis.
  • HLA typing currently holds minimal clinical value for diagnosing or prognosing juvenile arthritis (JA).

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