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Evaluating a Novel Human Fibrinogen Concentrate (BT524) for Congenital Fibrinogen Deficiency
Wolfgang Miesbach /LinkedIn
Oct 22, 2025, 10:35

Evaluating a Novel Human Fibrinogen Concentrate (BT524) for Congenital Fibrinogen Deficiency

Wolfgang Miesbach, Professor of Medicine at Frankfurt University Hospital, shared on LinkedIn:

”Excited to share our new publication evaluating a novel human fibrinogen concentrate (BT524) for the treatment of congenital fibrinogen deficiency!

This fibrinogen concentrate includes three independent virus inactivation and removal steps to ensure maximum viral safety.

In this prospective Phase I/III trial, BT524 was investigated in 27 patients (15 adults and 12 children) with congenital afibrinogenemia or severe hypofibrinogenemia:

  • Single-dose administration (70 mg/kg) effectively increased fibrinogen antigen levels from undetectable to therapeutic levels
  • Half-life: 67.9 hours (FiAg) and 60.3 hours (FiAc) – providing sustained hemostatic coverage
  • Significant improvement in clot firmness (FIBTEM MCF +11.1 mm, p < 0.0001) within 1 hour
  • Excellent safety profile – only one mild treatment-related adverse event (increased D-dimer), with no thromboembolic events, hypersensitivity reactions, or inhibitor development.

This new fibrinogen concentrate demonstrates excellent pharmacokinetics while providing an outstanding safety and tolerability profile across all age groups.

An important step forward for patients with this ultra-rare bleeding disorder, and a important improvement in the evolution of fibrinogen replacement therapy.

Congratulations to the study team, the co-authors and Biotest— more exciting work ahead!”

Read the full article here.

Article: Pharmacokinetics, Hemostatic Efficacy, and Safety of a New Human Fibrinogen Concentrate in Adult and Pediatric Patients with Congenital Fibrinogen Deficiency

Authors: Claudia Djambas Khayat, Amal El-Beshlawy, Balkis Meddeb, Abderrahim Khelif, Wolfgang Miesbach, Sonia Adolf, Heike Boehm, Silke Aigner, Salomon Abraha , Fabian Bohlaender, Joerg Schuettrumpf

Evaluating a Novel Human Fibrinogen Concentrate (BT524) for Congenital Fibrinogen Deficiency

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Abderrahim Khelif Amal El-Beshlawy Balkis Meddeb BT524 Claudia Djambas Khayat Fabian Bohlaender Fibrinogen Deficiency Health Heike Boehm Hematology Hemostasis Hemostasis Today Human Fibrinogen Concentrate Joerg Schuettrumpf Medicine Salomon Abraha Silke Aigner Sonia Adolf thrombosis Wolfgang Miesbach
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