HOPE-B: Trial of AMT-061 in Severe or Moderately Severe Hemophilia B Patients
Summary
This is an open-label, single-dose, multi-center, multinational trial to demonstrate the efficacy of AMT-061 and to further describe its safety profile. The study drug is identified as AAV5-hFIXco-Padua (AMT- 061). AMT-061 is a recombinant adeno-associated viral vector of serotype 5 (AAV5) containing the Padua variant of a codon-optimized human FIX complementary deoxyribonucleic acid (cDNA) under the control of a liver-specific promoter. The pharmaceutical form of AMT-061 is a solution for intravenous infusion administered at a dose of 2 x 10\^13 gc/kg.
Timeline
- Start
- 2018-06-27
- Primary completion
- 2021-09-22
- Completion
- 2025-03-19
Outcome
Met primary endpoint
paper rate ratio of 0.36 (95% Wald CI, 0.20 to 0.64; P<0.001), demonstrating noninferiority and superiority of etranacogene dezaparvovec as compared with factor IX prophylaxis. PMID 36812434 ↗
release “the adjusted annualized bleeding rate (ABR) (1.51) for all bleeds was reduced by 64 percent (p=0.0002)” csl.com ↗
release “In December 2021, the Company and CSL Behring announced the achievement of primary and secondary endpoints from the HOPE-B pivotal trial of etranacogene dezaparvovec” gcs-web.com ↗
Publications
- Pipe SW, Miesbach W, Recht M, Leebeek FWG, Key NS, Castaman G, Lattimore S, Coppens M, Le Quellec S, Mahajan V, Gill S, Drelich D, Monahan PE; HOPE-B Study Group Investigators. Final Analysis of a Study of Etranacogene Dezaparvovec for Hemophilia B. N Engl J Med. 2026 Jan 29;394(5):463-474. doi: 10.1056/NEJMoa2514332. Epub 2025 Dec 7.
- Parman T, Pizzurro DM, Lucas J, Peng Z. Mutagenesis and Carcinogenesis Risk Evaluation for AAV and Lentiviral Gene Therapies. Int J Toxicol. 2025 May-Jun;44(3):183-195. doi: 10.1177/10915818251318248. Epub 2025 Feb 11.
- O'Connell N, van der Valk P, Le Quellec S, Gomez E, Monahan PE, Crary SE, Coppens M, Lemons R, Castaman G, Klamroth R, Symington E, Quon DV, Kampmann P. Invasive procedures and surgery following etranacogene dezaparvovec gene therapy in people with hemophilia B. J Thromb Haemost. 2025 Jan;23(1):73-84. doi: 10.1016/j.jtha.2024.08.027. Epub 2024 Sep 26.
- Coppens M, Pipe SW, Miesbach W, Astermark J, Recht M, van der Valk P, Ewenstein B, Pinachyan K, Galante N, Le Quellec S, Monahan PE, Leebeek FWG; HOPE-B Investigators. Etranacogene dezaparvovec gene therapy for haemophilia B (HOPE-B): 24-month post-hoc efficacy and safety data from a single-arm, multicentre, phase 3 trial. Lancet Haematol. 2024 Apr;11(4):e265-e275. doi: 10.1016/S2352-3026(24)00006-1. Epub 2024 Mar 1.
- Pipe SW, Leebeek FWG, Recht M, Key NS, Castaman G, Miesbach W, Lattimore S, Peerlinck K, Van der Valk P, Coppens M, Kampmann P, Meijer K, O'Connell N, Pasi KJ, Hart DP, Kazmi R, Astermark J, Hermans CRJR, Klamroth R, Lemons R, Visweshwar N, von Drygalski A, Young G, Crary SE, Escobar M, Gomez E, Kruse-Jarres R, Quon DV, Symington E, Wang M, Wheeler AP, Gut R, Liu YP, Dolmetsch RE, Cooper DL, Li Y, Goldstein B, Monahan PE. Gene Therapy with Etranacogene Dezaparvovec for Hemophilia B. N Engl J Med. 2023 Feb 23;388(8):706-718. doi: 10.1056/NEJMoa2211644.
Drugs
| Evaluation | Drug | Modality | Dose | Route |
|---|---|---|---|---|
| Subject | AAV5-hFIXco-Padua | Unknown | 2e+13 vg/kg | Intravenous |
| Comparator | Factor IX (FIX) | Unknown | — | — |