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HLA antigens in alkaptonuric patients
G Aliberti1, M Proietta, I Pulignano
1Department of Clinical Sciences, La Sapienza University, Rome, Italy.
Panminerva Medica
|October 2, 2001
Summary
Alkaptonuria patients with ochronotic arthropathy show a higher prevalence of HLA-DR7 antigen. This finding suggests a potential genetic link between human leukocyte antigen (HLA) and alkaptonuria.
Area of Science:
- Genetics
- Immunology
- Rheumatology
Background:
- Alkaptonuria (AKU) is an inherited disorder characterized by ochronotic arthropathy, caused by homogentisic acid polymer deposition.
- The clinical presentation of inherited diseases can be influenced by genetic and environmental factors, including the human leukocyte antigen (HLA) system.
Purpose of the Study:
- To investigate the association between HLA antigens and ochronotic arthropathy in patients with alkaptonuria.
- To explore the potential role of the HLA system in the pathophysiology and clinical expression of alkaptonuria.
Main Methods:
- Human leukocyte antigen (HLA) typing was performed on 21 family members and 2 isolated patients with alkaptonuria.
- Antigens from HLA loci A, B, C, DR, and DQ were analyzed using microlymphocytotoxicity and fluorescence methods.
- Statistical analysis employed the chi-square test with Yates correction due to the small sample size.
Main Results:
- A significantly higher prevalence of the HLA-DR7 antigen was observed in alkaptonuric patients compared to the general population (p<0.02).
- No significant differences in the prevalence of HLA A, B, C, and DQ antigens were found between patients and the general population.
Conclusions:
- The study suggests a possible association between HLA-DR7 and alkaptonuria.
- The HLA system may play a role in the development and clinical manifestation of ochronotic arthropathy in alkaptonuria patients.