Preclinical safety and efficacy of a new recombinant FIX drug product for treatment of hemophilia B.
Baxter has developed a new recombinant factor IX (rFIX) drug product (BAX326) for treating patients with hemophilia B, or congenital FIX deficiency. An extensive preclinical program evaluated the pharmacokinetics, efficacy, and safety of BAX326 in different species. The efficacy of BAX326 was tested in three mouse models of primary pharmacodynamics: tail-tip bleeding, carotid occlusion, and thrombelastography. The pharmacokinetics was evaluated after a single intravenous bolus injection in mice, rats, and macaques. Toxicity was assessed in rats and macaques, safety pharmacology in rabbits and macaques, and immunogenicity in mice. BAX326 was shown to be efficacious in all three primary pharmacodynamic studies (P ≤ 0.0076). Hemostatic efficacy was dose related and similar for the three lots tested. Pharmacokinetic results showed that rFIX activity and rFIX antigen concentrations declined in a bi-phasic manner, similar to a previously licensed rFIX product. BAX326 was well tolerated in rabbits and macaques at all dose levels; no thrombogenic events and no adverse clinical, respiratory, or cardiovascular effects occurred. BAX326 was also shown to have a similar immunogenicity profile to the comparator rFIX product in mice. These results demonstrate that BAX326 has a favorable preclinical safety and efficacy profile, predictive of a comparable effect to that of the previously licensed rFIX in humans.
Baxter Innovations GmbH, Wagramer Straße 17-19, 1221, Vienna, Austria.
Barbara
B
Dietrich
Alexandra
A
Schiviz
Werner
W
Hoellriegl
Frank
F
Horling
Karima
K
Benamara
Hanspeter
H
Rottensteiner
Peter L
PL
Turecek
Hans Peter
HP
Schwarz
Friedrich
F
Scheiflinger
Eva-Maria
EM
Muchitsch
D000818:Animals; D001760:Bleeding Time; D001777:Blood Coagulation / Q000187:drug effects; D004195:Disease Models, Animal; D004353:Drug Evaluation, Preclinical; D005164:Factor IX / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D002836:Hemophilia B / Q000097:blood / Q000188:drug therapy*; D006801:Humans; D008251:Macaca; D008297:Male; D051379:Mice; D011817:Rabbits; D051381:Rats; D011994:Recombinant Proteins / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D013916:Thrombelastography; D016896:Treatment Outcome
D011994:Recombinant Proteins; D005164:Factor IX