Evaluation of the Safety and Efficacy of Hemophilia B Gene Therapy Drug
Summary
This is a multi-center, Phase 1/2/3, single-arm, open-label, single-dose treatment clinical study to evaluate the safety, tolerability and efficacy of BBM-H901 injection in Hemophilia B subjects with ≤2 International unit per deciliter (IU/dl) residual factor IX (FIX) levels. BBM-H901 is an adeno-associated virus (AAV) vector derived from recombinant DNA techniques to contain an expression cassette of the human factor IX (hFIX) transgene and raises circulating levels of endogenous FIX.
Timeline
- Start
- 2021-12-30
- Primary completion
- 2024-04-16
- Completion
- 2028-06-30
Outcome
Met primary endpoint
paper The primary endpoint was met with no DLT observed in the 10 weeks postinfusion. PMID 41266685 ↗
paper The study met its primary endpoint PMID 41266685 ↗
paper the upper limit of the 95% CI (1.99) was lower than the predefined superiority margin of 5.0 PMID 41266685 ↗
Publications
- Background Xue F, Li H, Wu X, Liu W, Zhang F, Tang D, Chen Y, Wang W, Chi Y, Zheng J, Du Z, Jiang W, Zhong C, Wei J, Zhu P, Fu R, Liu X, Chen L, Pei X, Sun J, Cheng T, Yang R, Xiao X, Zhang L. Safety and activity of an engineered, liver-tropic adeno-associated virus vector expressing a hyperactive Padua factor IX administered with prophylactic glucocorticoids in patients with haemophilia B: a single-centre, single-arm, phase 1, pilot trial. Lancet Haematol. 2022 Jul;9(7):e504-e513. doi: 10.1016/S2352-3026(22)00113-2. Epub 2022 May 19.
- Background Xue F, Wang P, Yuan Z, Shi C, Fang Y, Liu W, Wang Y, Xiao X, Yang R, George LA, Zhang L. Total Knee Arthroplasty after Gene Therapy for Hemophilia B. N Engl J Med. 2022 Oct 27;387(17):1622-1624. doi: 10.1056/NEJMc2211173. No abstract available.
- Results Wei H, Xiao W, Dai J. China's first approved gene therapy for hemophilia B: A new era for global AAV-based treatments. Mol Ther. 2025 Jun 4;33(6):2312-2313. doi: 10.1016/j.ymthe.2025.05.014. Epub 2025 May 28. No abstract available.
- Results Xue F, Hu Y, Yang R, Sun J, Yang L, Wang X, Yu Z, Zhu T, Zhou H, Zhou Z, Yan Z, Du X, Zheng C, Liu W, Zhou R, Dai J, Yin J, Wang H, Tang LV, Chen S, Cheng H, Zhu M, Wang S, Song Y, Zhang P, Zhang L. Chinese guidance for the clinical application of adeno-associated virus vector-based gene therapy for hemophilia B (2025). Blood Sci. 2025 Oct 29;7(4):e00257. doi: 10.1097/BS9.0000000000000257. eCollection 2025 Dec.
- Results Xue F, Ju M, Zhu T, Zhou Z, Sun J, Yang L, Yan Z, Zhou H, Du X, Zheng C, Zheng J, Wu X, Du Z, Jiang W, Yang C, Xiao X, Liu W, Yang R, Zhang L. Factor IX-Padua AAV gene therapy in hemophilia B: phases 1/2 and 3 trials. Nat Med. 2026 Jan;32(1):93-102. doi: 10.1038/s41591-025-04012-y. Epub 2025 Nov 20.
Drugs
| Evaluation | Drug | Modality | Dose | Route |
|---|---|---|---|---|
| Subject | BBM-H901 | Gene therapy (AAV / viral vector) | 5e+12 vg/kg | Intravenous |