In vitro assessment of edoxaban anticoagulant effect in pediatric plasma
Thomas Sinegre1, Mélissa Zlobecki2, Eric Doré3
1CHU Clermont-Ferrand, Service d'Hématologie Biologique, Clermont-Ferrand, France; Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, CRNH Auvergne, Clermont-Ferrand, France.
Insights
Direct oral anticoagulants like edoxaban show promise for children. In vitro studies found edoxaban
Area of Science:
- Pharmacology
- Pediatric Medicine
- Hematology
Background:
- Anticoagulant therapy in children presents challenges.
- Direct oral anticoagulants (DOACs) offer potential safer alternatives.
- Edoxaban, a factor Xa inhibitor, is a candidate for pediatric use.
Purpose of the Study:
- To compare the in vitro anticoagulant effects of edoxaban in pediatric and adult populations.
- To evaluate edoxaban's dose-dependent activity across different age groups.
Main Methods:
- Prospective collection of blood samples from 87 adults and 97 children across various age strata.
- In vitro addition of edoxaban to plasma samples at concentrations of 50, 150, and 300 ng/mL.
- Assessment of edoxaban's impact on prothrombin time (PT), activated partial thromboplastin time (aPTT), fibrinogen, anti-factor Xa activity, and thrombin generation assay (TGA).
Main Results:
- Edoxaban demonstrated dose-dependent effects on PT, aPTT, and anti-factor Xa activity, consistent across adult and pediatric groups.
- Thrombin peak reduction in TGA was similar between adults and children.
- A significantly higher reduction in thrombin peak was observed in the youngest pediatric group (<2 years old) compared to adults at all tested edoxaban concentrations.
Conclusions:
- Edoxaban exhibits comparable in vitro anticoagulant effects in children and adults.
- The <2-year-old pediatric group showed a more pronounced response to edoxaban's anticoagulant effect.
- These findings support edoxaban's potential as a safer anticoagulant option for pediatric patients, with potential age-specific considerations for the youngest.
Introduction:
Anticoagulant therapy in pediatric patients remains an issue and safer therapies, such as direct oral anticoagulants could overcome the limitations of conventional anticoagulant treatments in this population. Edoxaban, a factor Xa inhibitor, is used for the prevention and treatment of venous thromboembolism. Due to its pharmacokinetic characteristics, edoxaban is a promising candidate molecule for children. This study compared edoxaban in vitro effect in children and adults.
Materials And Methods:
Blood samples were prospectively collected from 87 adults and 97 children (n = 12: <2 year-old; n = 8: 2-4 year-old; n = 9: 5-7 year-old; n = 14: 8-9 year-old; n = 10: 10-13 year-old; n = 15: 14-15 year-old; and n = 29: 16-18 year-old). Plasma samples were supplemented in vitro with edoxaban to a final concentration of 50, 150 or 300 ng/mL, and then edoxaban effect on prothrombin time (PT), activated partial thromboplastin time (aPTT), fibrinogen (Clauss assay), specific anti-factor Xa activity and thrombin generation assay (TGA) (with 5pM tissue factor and 4 nM phospholipids) was evaluated.
Results:
PT, aPTT, and specific anti-Xa activity exhibited similar dose-dependent responses to edoxaban in the different age groups. The reduction of thrombin peak, the most edoxaban-sensitive TGA parameter, was similar in adults and children, but for the youngest group (<2 year-old) where the peak value reduction (median [Q1-Q3]) was higher than in adults (51% [44-59] versus 40% [32-46], p < 0.01; 74% [63-80] versus 65% [58-70], p < 0.05; and 84% [73-88] versus 76% [70-80], p < 0.05 for 50, 150 and 300 ng/mL edoxaban, respectively).
Conclusions:
Edoxaban in vitro effect are comparable in children and adults except in the <2-year-old group.
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