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Activation of complement and coagulation in juvenile dermatomyositis
Arthritis and Rheumatism
|May 1, 1987
Insights
Juvenile dermatomyositis (JDM) involves reduced capillaries due to thrombosis. Active JDM patients showed elevated C3d, fibrinopeptide A, and factor VIII-related antigen, indicating active inflammation and clotting in this condition.
Area of Science:
- Rheumatology
- Pediatrics
- Hematology
Background:
- Juvenile dermatomyositis (JDM) is an autoimmune disease affecting children.
- Pathological changes in JDM include small vessel occlusion and thrombosis.
- This leads to a decreased capillary to muscle fiber ratio, impacting muscle health.
Purpose of the Study:
- To investigate the relationship between disease activity and specific biomarkers in JDM.
- To explore the role of complement activation and coagulation factors in JDM pathogenesis.
Main Methods:
- Study included 15 patients diagnosed with JDM.
- Blood samples were analyzed for levels of C3d, fibrinopeptide A, and factor VIII-related antigen.
- Clinical assessment of disease activity was performed.
Main Results:
- Six out of seven patients with clinically active JDM exhibited elevated C3d levels.
- Significantly increased concentrations of fibrinopeptide A were observed in active JDM patients.
- Elevated levels of factor VIII-related antigen were also noted in patients with active JDM.
Conclusions:
- Elevated C3d suggests complement system activation in active JDM.
- Increased fibrinopeptide A and factor VIII-related antigen indicate heightened coagulation and thrombotic activity.
- These biomarkers may serve as indicators of disease activity and inflammation in juvenile dermatomyositis.
Abstract:
In patients with juvenile dermatomyositis (JDM), small vessel occlusion and thrombosis result in a decrease in the capillary: muscle fiber ratio. We studied 15 patients with JDM. Six of 7 patients with clinically active JDM had elevated levels of C3d. Moreover, concentrations of fibrinopeptide A and factor VIII-related antigen were significantly increased in patients with clinically active JDM.
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