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Chronic synovitis and HLA B27 in patients with severe haemophilia
Kanjaksha Ghosh1, Umapathy Shankarkumar, Shrimati Shetty
1Institute of Immunohaematology, Floor 13, New Building, KEM Hospital Campus, Parel, 400 012, Mumbai, India.
Insights
A strong association exists between HLA B27 and chronic synovitis in severe haemophilia patients in India. Screening for HLA B27 could aid in preventing this complication.
Area of Science:
- Immunogenetics
- Rheumatology
- Hematology
Background:
- Chronic synovitis is a complication in severe haemophilia, particularly in India.
- Ankylosing spondylitis, sharing features with chronic synovitis, is associated with HLA B27.
Purpose of the Study:
- To investigate the association between HLA B27 and chronic synovitis in Indian patients with severe haemophilia.
Main Methods:
- A study involving 473 severe haemophilia patients (33 with chronic synovitis) and 1175 healthy controls.
- Utilized standard serological techniques and the reverse line strip assay for HLA B27 testing.
Main Results:
- 64% of haemophilia patients with chronic synovitis tested positive for HLA B27.
- A significantly higher prevalence of HLA B27 was observed in patients with chronic synovitis compared to those without and healthy controls (OR 31.6, p<0.0001).
Conclusions:
- There is a strong association between HLA B27 and chronic synovitis in Indian patients with severe haemophilia.
- Screening for HLA B27 in this population may facilitate early treatment and prevention strategies for chronic synovitis.
Abstract:
Chronic synovitis affects about 10% of patients with severe haemophilia in India. This disease has some features in common with ankylosing spondylitis, which has been linked to HLA B27. We therefore aimed to test whether there is an association between HLA B27 and chronic synovitis. We studied 473 patients with severe haemophilia (33 of whom had chronic synovitis), and 1175 healthy controls using a standard serological technique and the reverse line strip assay. 64% (21 of 33) of patients with haemophilia and chronic synovitis were positive for HLA B27, compared with 5% (23 of 440) of those with severe haemophilia, but not chronic synovitis (odds ratio 31.6 [95% CI 9.28-39.38], p<0.0001), and 9% (100 of 1175) of healthy controls (18.81 [9.6-27.7], p<0.0001). We conclude that there is a strong association between HLA B27 and chronic synovitis in Indian patients with severe haemophilia and screening in this population could allow treatment and prevention of the complication.
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