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The Nijmegen Hemostasis Assay: Simultaneous Fluorogenic Measurement of Thrombin and Plasmin Generation in a Single Well
Published on: February 27, 2026
[EVALUATION OF DYSFUNCTION IN BLOOD COAGULATION IN CHILDREN WITH URTICARIA]
Koji Nishimura1, Kazuyo Kuzume, Yuki Kagata
1Department of Pediatrics, Ehime University Graduate School of Medicine.
Insights
Prothrombin fragments 1+2 (PTF1+2) levels are elevated in active urticaria in children. These levels, along with fibrin degradation product (FDP) and D-dimer, decrease as urticaria symptoms improve, indicating their potential as biomarkers.
Area of Science:
- Pediatric Hematology
- Dermatology
- Coagulation Science
Context:
- Urticaria is a common dermatological condition with a known association with coagulation dysfunction.
- Research specifically examining coagulation markers in pediatric urticaria is limited.
- Understanding these associations can improve diagnostic and prognostic capabilities.
Purpose:
- To investigate coagulation markers in children with different types of urticaria.
- To determine if specific coagulation markers correlate with urticaria activity.
- To explore the utility of these markers in assessing disease severity.
Summary:
- Prothrombin fragments 1+2 (PTF1+2) levels were significantly higher in children with active chronic urticaria and acute urticaria compared to inactive chronic urticaria.
- No significant differences in fibrin degradation product (FDP), D-dimer, or mean platelet volume (MPV) were found among the groups.
- Levels of PTF1+2, FDP, and D-dimer decreased as urticaria symptoms resolved.
Impact:
- Plasma PTF1+2 levels may serve as a valuable biomarker for assessing urticaria activity in pediatric patients.
- This finding could lead to more objective measures of disease severity and treatment response.
- Further research can validate these markers for clinical application in pediatric dermatology.
Introduction:
Recently, an association between coagulation dysfunction and the pathology of urticaria has been reported, but research in children is scarce.
Patients And Methods:
We measured levels of prothrombin fragments 1+2 (PTF1+2), fibrin degradation product (FDP), D-dimer, and mean platelet volume (MPV) in 32 children with urticaria. The study cohort comprised 18 cases of chronic and active urticaria, 7 cases of chronic and inactive urticaria, and 7 cases of acute urticaria.
Results:
PTF1+2 levels in the chronic and active urticaria group were higher than those in the chronic and inactive urticaria group (p<0.01). PTF1+2 levels in the acute urticaria group were higher than those in the chronic and inactive group (p<0.05). No significant difference was observed in the levels of FDP, D-dimer, and MPV among the three groups of the patients. Levels of PTF1+2, FDP, and D-dimer decreased as symptoms improved.
Conclusion:
Plasma levels of PTF1+2 may be useful for assessment of the activity of urticaria.
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