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HLA and juvenile chronic polyarthritis
The Journal of Rheumatology. Supplement
|January 1, 1977
Summary
Juvenile chronic polyarthritis (JCP) is strongly associated with the B27 antigen. Patients with JCP and the B27 antigen have a higher risk of developing sacroiliitis and acute uveitis.
Area of Science:
- Immunogenetics
- Rheumatology
- Pediatrics
Background:
- Juvenile chronic polyarthritis (JCP) is a significant pediatric rheumatic condition.
- The role of human leukocyte antigen (HLA) B27 in JCP pathogenesis is not fully understood.
Purpose of the Study:
- To investigate the association between HLA B27 antigen and juvenile chronic polyarthritis (JCP).
- To explore subtypes of JCP based on clinical presentation and HLA B27 status.
Main Methods:
- HLA antigen typing was performed on 38 JCP patients and 1,000 healthy controls.
- JCP patients were subclassified into four groups based on clinical features, including ankylosing spondylitis (AS), sacroiliitis (SI), and juvenile rheumatoid arthritis (JRA).
Main Results:
- The incidence of HLA B27 was significantly higher in JCP patients (55.3%) compared to controls (6.7%).
- JCP patients who developed AS or SI showed a high prevalence of B27 (20/21), unlike those without SI or with JRA (1/17).
- Sex distribution varied between JCP subtypes, mirroring patterns seen in adult AS and rheumatoid arthritis.
Conclusions:
- HLA B27 positivity in JCP patients increases the risk of developing sacroiliitis and acute uveitis.
- The term Still's disease is proposed for JCP presenting before age 16, with subsequent classification into subtypes.
- Clinical follow-up aids in classifying JCP into juvenile AS, JCP with SI, JCP without SI, or JRA.