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Type: Artigo de periódico
Title: Recombinant Factor Viia Analog (vatreptacog Alfa [activated]) For Treatment Of Joint Bleeds In Hemophilia Patients With Inhibitors: A Randomized Controlled Trial.
Author: de Paula, Erich V
Kavakli, Kaan
Mahlangu, Johnny
Ayob, Yasmin
Lentz, Steven R
Morfini, Massimo
Nemes, László
Šalek, Silva Z
Shima, Midori
Windyga, Jerzy
Ehrenforth, Silke
Chuansumrit, Ampaiwan
Abstract: A recombinant factor VIIa analog (NN1731; vatreptacog alfa [activated]) was developed to provide safe, rapid and sustained resolution of bleeds in patients with hemophilia and inhibitors. This global, prospective, randomized, double-blinded, active-controlled, dose-escalation trial evaluated and compared one to three doses of vatreptacog alfa at 5, 10, 20, 40, and 80 lg kg(-1) with one to three doses of recombinant FVIIa (rFVIIa) at 90 lg kg(-1) in the treatment of acute joint bleeds in hemophilia patients with inhibitors. The primary endpoint comprised adverse events; secondary endpoints were evaluations of immunogenicity, pharmacokinetics, and efficacy. Overall, 96 joint bleeds in 51 patients (> 12 years of age) were dosed. Vatreptacog alfa was well tolerated, with a low frequency of adverse events. No immunogenic or thrombotic events related to vatreptacog alfa were reported. A high efficacy rate of vatreptacog alfa in controlling acute joint bleeds was observed; 98% of bleeds were controlled within 9 h of the initial dose in a combined evaluation of 20–80 lg kg(-1) vatreptacog alfa. The efficacy rate observed for rFVIIa (90%) is consistent with data from published clinical trials. The trial was not powered to compare efficacy, and further trials are needed to investigate the efficacy of vatreptacog alfa as compared with that of rFVIIa. The trial was registered at ( NCT00486278).
Subject: Adolescent
Dose-response Relationship, Drug
Double-blind Method
Factor Viia
Hemophilia A
Recombinant Proteins
Treatment Outcome
Young Adult
Citation: Journal Of Thrombosis And Haemostasis : Jth. v. 10, n. 1, p. 81-9, 2012-Jan.
Rights: fechado
Identifier DOI: 
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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