PMID- 38229269 OWN - NLM STAT- MEDLINE DCOM- 20240314 LR - 20240314 IS - 1365-2516 (Electronic) IS - 1351-8216 (Linking) VI - 30 IP - 2 DP - 2024 Mar TI - Safety and efficacy of damoctocog alfa pegol prophylaxis in patients with severe haemophilia A: Results of an interventional, post-marketing study. PG - 388-394 LID - 10.1111/hae.14930 [doi] AB - INTRODUCTION: Damoctocog alfa pegol (BAY 94-9027, Jivi((R)) ) is an approved extended half-life factor VIII (FVIII) for treatment of previously treated patients with haemophilia A aged >/=12 years. We report the final results of an interventional, post-marketing study of damoctocog alfa pegol prophylaxis in patients with severe haemophilia A. METHODS: In this open-label, interventional, post-marketing, phase 4 trial (NCT04085458), previously FVIII-treated patients with severe haemophilia A aged >/=18 years received damoctocog alfa pegol for >/=100 exposure days (EDs). Patients initially received 45 IU/kg every 5 days (recommended) or 40 IU/kg twice-weekly. At Visit 3, patients' doses could be increased, or treatment frequency adapted. The primary endpoint was FVIII inhibitor development (titre >/=.6 Bethesda units). Secondary endpoints included anti-polyethylene glycol (PEG) antibody development, treatment-emergent adverse events (AEs) and annualized bleeding rate (ABR). RESULTS: Overall, 36 patients were enrolled; 32 patients received treatment, of whom, 27 completed the study. No patients developed FVIII inhibitors; three tested transiently positive for low-titre anti-PEG antibodies without clinical relevance. Three patients reported study-drug-related AEs of mild or moderate intensity. Two patients discontinued the study due to AEs. No deaths occurred. Most patients (70%) were treated with E5D/E7D regimens. The median (Q1;Q3) total ABR (N = 30) was 3.0 (.0;9.0) pre-study and 1.8 (.7;5.9) during the study. CONCLUSION: Damoctocog alfa pegol individualized prophylaxis regimens were well-tolerated with no immunogenicity concerns. ABRs improved following the switch from pre-study prophylaxis to damoctocog alfa pegol prophylaxis. These results support the favourable safety and efficacy profile of damoctocog alfa pegol prophylaxis. CI - (c) 2024 The Authors. Haemophilia published by John Wiley & Sons Ltd. FAU - Holme, Pal Andre AU - Holme PA AUID- ORCID: 0000-0002-3888-2905 AD - Department of Haematology, Oslo University Hospital and Institute of Clinical Medicine, University of Oslo, Oslo, Norway. FAU - Poulsen, Lone Hvitfeldt AU - Poulsen LH AD - The Haemophilia Centre, Aarhus University Hospital, Aarhus, Denmark. FAU - Tueckmantel, Claudia AU - Tueckmantel C AD - Bayer AG, Wuppertal, Germany. FAU - Maas Enriquez, Monika AU - Maas Enriquez M AD - Bayer AG, Wuppertal, Germany. FAU - Alvarez Roman, Maria Teresa AU - Alvarez Roman MT AUID- ORCID: 0000-0003-3296-4288 AD - Hospital Universitario La Paz, Madrid, Spain. FAU - De Cristofaro, Raimondo AU - De Cristofaro R AD - Agostino Gemelli University Hospital Foundation IRCCS, Rome, Italy. LA - eng PT - Journal Article DEP - 20240116 PL - England TA - Haemophilia JT - Haemophilia : the official journal of the World Federation of Hemophilia JID - 9442916 RN - 9001-27-8 (Factor VIII) RN - 0 (Hemostatics) SB - IM MH - Humans MH - Adolescent MH - Adult MH - Factor VIII/therapeutic use MH - *Hemophilia A/drug therapy MH - Treatment Outcome MH - Hemorrhage/prevention & control MH - *Hemostatics/therapeutic use MH - Marketing OTO - NOTNLM OT - extended half-life OT - haemophilia A OT - prophylaxis OT - recombinant factor FVIII EDAT- 2024/01/17 06:42 MHDA- 2024/03/14 06:47 CRDT- 2024/01/17 00:53 PHST- 2023/12/19 00:00 [revised] PHST- 2023/06/27 00:00 [received] PHST- 2023/12/19 00:00 [accepted] PHST- 2024/03/14 06:47 [medline] PHST- 2024/01/17 06:42 [pubmed] PHST- 2024/01/17 00:53 [entrez] AID - 10.1111/hae.14930 [doi] PST - ppublish SO - Haemophilia. 2024 Mar;30(2):388-394. doi: 10.1111/hae.14930. Epub 2024 Jan 16.