Clinical Trial to Investigate the Pharmacokinetics, Pharmacodynamics, Safety, and Efficacy of Recombinant Factor VIIa in Japanese Patients With Hemophilia With ... View Full Text


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Article Info

DATE

2001-05

AUTHORS

Akira Shirahata, Tadashi Kamiya, Junki Takamatsu, Tetsuhito Kojima, Katsuyuki Fukutake, Morio Arai, Hideji Hanabusa, Hisamichi Tagami, Akira Yoshioka, Midori Shima, Hiroyuki Naka, Shigeru Fujita, Yoko Minamoto, Junji Kamizono, Hidehiko Saito

ABSTRACT

A multicenter and open-labeled clinical trial of human recombinant factor VIIa (rFVIIa) was conducted in Japanese patients with severe hemophilia A or B with inhibitors. The trial consisted of 2 parts. In study 1, the pharmacokinetics, pharmacodynamics, and safety of a single dose of 120 microg/kg of rFVIIa were investigated in 8 patients. In the subsequent study 2, the hemostatic effect and safety of rFVIIa were evaluated during a 24-week period in 10 patients. In study 1, the mean maximum FVII-coagulant activity (FVII:C) was found to occur after 10 minutes; activity then decreased rapidly and returned to the baseline within 24 hours after a single intravenous infusion of rFVIIa. The mean half-life of FVII:C was 3.5 hours. The activated partial thromboplastin time and prothrombin time in the patients were immediately shortened but returned to the baseline within 24 hours after dosing. In study 2, 86 microg/kg to 120 microg/kg of rFVIIa (mean, 97 microg/kg) was administered 1 to 85 times to 10 patients. A total of 58.0% (91/157) of bleeding episodes were treated excellently or effectively, with 5 (3.2%) ineffective episodes. There was no apparent trend in the relationship of the hemostatic effect with bleeding sites, mean dose, or number of injections. The efficacy rate, however, was significantly higher (90.0%) in bleeding episodes treated within 3 hours than in those treated at longer intervals (31.0%). No treatment-related adverse events were observed, and there was no evidence of antibody formation to rFVIIa. In conclusion. rFVIIa is an effective and well-tolerated option for treatment of bleeding episodes in hemophilia patients with inhibitors. More... »

PAGES

517-525

References to SciGraph publications

  • 1994-06. Pharmacokinetics and pharmacodynamics of recombinant factor VIIa in CLINICAL PHARMACOLOGY & THERAPEUTICS
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/bf02994016

    DOI

    http://dx.doi.org/10.1007/bf02994016

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1004538043

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/11503968


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