Anterior uveitis in children. An analysis of 75 cases with special reference to retinal anti-S antibodies
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R J Uusitalo1, H Uusitalo, K Mahlberg
1Department of Ophthalmology, Helsinki University Central Hospital, Finland.
Insights
This study found that children with chronic uveitis have higher levels of antibodies to retinal S-antigen compared to healthy children. Acute uveitis showed no significant difference in these antibody levels.
Area of Science:
- Ophthalmology
- Immunology
- Pediatrics
Background:
- Childhood uveitis is an ocular inflammatory condition requiring investigation into its underlying mechanisms.
- Humoral immunity, specifically antibodies to retinal S-antigen, is explored as a potential factor in childhood uveitis.
Observation:
- A prospective study analyzed 75 children with anterior uveitis, categorizing them into acute (18) and chronic (57) forms.
- Clinical features like unilateral vs. bilateral involvement, complications, and visual outcomes differed significantly between acute and chronic groups.
- Serum samples were tested for antibodies to S-antigen using ELISA in patients and healthy controls.
Findings:
- A statistically significant elevation in antibodies to S-antigen was observed in children with chronic uveitis compared to controls.
- No significant difference in S-antigen antibody levels was found between children with acute uveitis and healthy children.
- Antibody titers did not consistently correlate with uveitis severity or clinical improvement in a longitudinal follow-up of 14 chronic cases.
Implications:
- Elevated S-antigen antibodies may serve as a biomarker for chronic childhood uveitis.
- Further research is needed to understand the role of S-antigen immunity in the pathogenesis of pediatric uveitis.
- These findings could inform diagnostic and therapeutic strategies for childhood uveitis.
Abstract:
In this prospective study of childhood uveitis, 75 children with anterior uveitis were analyzed to determine whether a relationship could be found between the occurrence of uveitis, its clinical features, and humoral immunity to retinal S-antigen. For the purposes of analysis, children were divided into acute (18 cases) and chronic (57 cases) categories, depending on the duration of ocular inflammation. Clinical features of both of these groups were compared and significant differences were found in the occurrence of unilateral vs bilateral involvement, the incidence of complications, and visual outcome. Serum samples from children with acute (7 cases) and chronic uveitis (28 cases) and from healthy children (132 cases) were tested for antibodies to S-antigen by enzyme-linked immunosorbent assay (ELISA). A statistically significant difference in the level of specific antibodies between patients with chronic uveitis and controls was found. However, there was no difference between children with acute uveitis and healthy patients, nor was there any correlation between the severity of uveitis and antibody titer. For further elucidation of the significance of circulating anti-S antibodies, 14 children with chronic anterior uveitis were followed for as long as 18 months after the initial visit. Multiple serum antibody titers to bovine retinal S-antigen were determined and compared with the clinical activity at the time of each sampling. In only 6 of 14 patients did the titers to S-antigen tend to decrease with clinical improvement and stabilize at titers somewhat higher than normal values.(ABSTRACT TRUNCATED AT 250 WORDS)