Anticoagulant Effects of Dabigatran on Coagulation Laboratory Parameters in Pediatric Patients: Combined Data from Five Pediatric Clinical Trials.

BACKGROUND

 Dabigatran etexilate, a direct oral thrombin inhibitor, is approved to treat venous thromboembolism (VTE) in both adults and children.

OBJECTIVES

 This population analysis characterized relationships between dabigatran total plasma concentrations and coagulation laboratory parameters (activated partial thromboplastin time [aPTT]; diluted thrombin time [dTT]; ecarin clotting time [ECT]).

METHODS

 Data from three phase 2a and one single-arm and one randomized, comparative phase 2b/3 pediatric studies (measurements: aPTT 2,925 [

RESULTS

 Overall, relationships between dabigatran, aPTT, dTT, and ECT were similar in children and adults. For children aged <6 months, a higher proportion of baseline samples were outside or close to the upper aPTT and ECT adult ranges. No age-related differences were detected for dTT. With increasing dabigatran concentration, aPTT rose nonlinearly (half the maximum effect at 368 ng/mL dabigatran) while dTT and ECT increased linearly (0.37 and 0.73% change per ng/mL dabigatran, respectively). Mean baseline aPTT (45 vs. 36 seconds) and ECT (40 vs. 36 seconds) were slightly increased for those aged <6 months versus older children.

CONCLUSION

 The similar relationships of laboratory parameters observed across pediatric age groups suggests that developmental changes in the hemostatic system may have little effect on response to dabigatran.

Informations de copyright

The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Déclaration de conflit d'intérêts

L.G.M. is a member of a pediatric expert working group for Boehringer Ingelheim and has received a research grant from Bristol Myers Squibb. D.R. is an employee of Pharmetheus, contracted as an external consultant by Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharmaceuticals. F.H., D.J., I.T., S.G., and M.B. are all employees of Boehringer Ingelheim. M.A. is a member of a pediatric expert working group for Boehringer Ingelheim and has received advisory board fees from Daiichi Sankyo. L.R.B. is a member of a pediatric expert working group for Boehringer Ingelheim and has received advisory board fees from Boehringer Ingelheim. L.B. is a member of a pediatric expert working group for Boehringer Ingelheim, and reports fees to her institution from Janssen Pharmaceuticals. E.C. is a member of a pediatric expert working group for Boehringer Ingelheim, and reports personal fees from Roche, Sobi, Bristol Myers Squibb, CSL Behring, and Shire/Takeda. J.H. is a member of a pediatric expert working group for Boehringer Ingelheim and has received honoraria from Boehringer Ingelheim for congress presentation. M.L. is a member of a pediatric expert working group for Boehringer Ingelheim.