Thromb Haemost 2005; 94(04): 802-807
DOI: 10.1160/TH05-04-0292
Blood Coagulation, Fibrinolysis and Cellular Haemostasis
Schattauer GmbH

Safety and pharmacokinetics of recombinant factor XIII in healthy volunteers

A randomized, placebo-controlled, double-blind, multi-dose study
Jennifer E. Visich
1   ZymoGenetics, Inc., Seattle, WA, USA
,
Linda A. Zuckerman
1   ZymoGenetics, Inc., Seattle, WA, USA
,
Michael D. Butine
1   ZymoGenetics, Inc., Seattle, WA, USA
,
Kulasiri A. Gunewardena
2   Chiltern International Ltd., Slough, Berkshire, UK
,
Richard Wild
2   Chiltern International Ltd., Slough, Berkshire, UK
,
Kirsten M. Morton
1   ZymoGenetics, Inc., Seattle, WA, USA
,
Thomas C. Reynolds
1   ZymoGenetics, Inc., Seattle, WA, USA
› Institutsangaben
Financial support: This study was supported by a grant from ZymoGenetics, Inc., Seattle, WA.
Weitere Informationen

Publikationsverlauf

Received27. April 2005

Accepted after revision22. Juli 2005

Publikationsdatum:
07. Dezember 2017 (online)

Summary

Factor XIII (FXIII) is a plasma transglutaminase that covalently cross-links fibrin proteins to one another and to other proteins, increasing the mechanical strength of blood clots. Endogenous FXIII is the final enzyme in the clotting cascade and circulates as a heterotetramer comprising 2 FXIII-A subunits and 2 FXIII-B subunits. Recombinant human FXIII A2 (rFXIII) homodimer is produced inSaccharomyces cerevisiae. Upon injection, rFXIII combines with the free FXIIIB subunit that circulates in excess to form the rA2B2 tetramer. In this placebo-controlled, doubleblind, multi-dose study, the safety, pharmacokinetics, and pharmacodynamics of rFXIII were studied in 24 healthy volunteers, who were randomized in 2 cohorts of 12 subjects each. In each cohort, 8 subjects received 5 daily intravenous doses of rFXIII (10 or 25 U/kg), and 4 subjects received placebo. Recombinant FXIII was well tolerated. No deaths or serious adverse events occurred. The type and frequency of adverse events showed no pattern or dose response. No clinically significant changes in haematology, serum chemistry, or urinalysis laboratory values were observed. No clinical coagulopathy or thrombosis was observed. Recombinant FXIII did not produce any anti-yeast or anti-FXIII antibodies. After 5 daily doses of rFXIII, accumulation indices indicated a 3 to 4fold accumulation of rFXIII in plasma. The elimination half-life, estimated for rFXIII as the heterotetramer, ranged from 228-346 hours for the 10U/kg dose group and 167-197 hours for the 25U/kg dose group. The safety, pharmacokinetic, and immunogenic profile of rFXIII suggests it may have potential use in patients with congenital or acquired FXIII deficiency

 
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