Gene Therapy Study in Severe Haemophilia A Patients (270-201)

Summary

This study is being conducted by BioMarin Pharmaceutical Inc. as an open label, dose escalation study in order to determine the safety and efficacy of valoctocogene roxaparvovec (an Adenovirus-Associated Virus based gene therapy vector in participants with severe haemophilia A.

Timeline

Start

2015-09-28

Primary completion

2024-02-14

Completion

2024-02-14

Outcome

Met primary endpoint

release “NEJM article, "AAV Gene Transfer in Patients with Severe Hemophilia A," concluded that valoctocogene roxaparvovec is associated with the "sustained normalization" of Factor VIII activity” biomarin.com ↗

release “Six-year and five-year post-treatment follow-up of the 6e13 vg/kg and 4e13 vg/kg cohorts, respectively, demonstrated sustained hemostatic efficacy of valoctocogene roxaparvovec.” biomarin.com ↗

Publications

• Santos S, Robinson TM, Trueman D. Estimated Long-Term Durability of Valoctocogene Roxaparvovec Treatment in Male patients with Severe Hemophilia A: An Extrapolation of Clinical Data. Adv Ther. 2025 Nov;42(11):5781-5793. doi: 10.1007/s12325-025-03368-4. Epub 2025 Sep 23.
• Symington E, Rangarajan S, Lester W, Madan B, Pierce GF, Raheja P, Millar C, Osmond D, Li M, Robinson TM. Valoctocogene roxaparvovec gene therapy provides durable haemostatic control for up to 7 years for haemophilia A. Haemophilia. 2024 Sep;30(5):1138-1147. doi: 10.1111/hae.15071. Epub 2024 Jul 8.
• Quinn J, Delaney KA, Wong WY, Miesbach W, Bullinger M. Psychometric Validation of the Haemo-QOL-A in Participants with Hemophilia A Treated with Gene Therapy. Patient Relat Outcome Meas. 2022 Jul 18;13:169-180. doi: 10.2147/PROM.S357555. eCollection 2022.
• Fong S, Yates B, Sihn CR, Mattis AN, Mitchell N, Liu S, Russell CB, Kim B, Lawal A, Rangarajan S, Lester W, Bunting S, Pierce GF, Pasi KJ, Wong WY. Interindividual variability in transgene mRNA and protein production following adeno-associated virus gene therapy for hemophilia A. Nat Med. 2022 Apr;28(4):789-797. doi: 10.1038/s41591-022-01751-0. Epub 2022 Apr 11.
• Pasi KJ, Laffan M, Rangarajan S, Robinson TM, Mitchell N, Lester W, Symington E, Madan B, Yang X, Kim B, Pierce GF, Wong WY. Persistence of haemostatic response following gene therapy with valoctocogene roxaparvovec in severe haemophilia A. Haemophilia. 2021 Nov;27(6):947-956. doi: 10.1111/hae.14391. Epub 2021 Aug 11.
• Rosen S, Tiefenbacher S, Robinson M, Huang M, Srimani J, Mackenzie D, Christianson T, Pasi KJ, Rangarajan S, Symington E, Giermasz A, Pierce GF, Kim B, Zoog SJ, Vettermann C. Activity of transgene-produced B-domain-deleted factor VIII in human plasma following AAV5 gene therapy. Blood. 2020 Nov 26;136(22):2524-2534. doi: 10.1182/blood.2020005683.
• Pasi KJ, Rangarajan S, Mitchell N, Lester W, Symington E, Madan B, Laffan M, Russell CB, Li M, Pierce GF, Wong WY. Multiyear Follow-up of AAV5-hFVIII-SQ Gene Therapy for Hemophilia A. N Engl J Med. 2020 Jan 2;382(1):29-40. doi: 10.1056/NEJMoa1908490.
• Rangarajan S, Walsh L, Lester W, Perry D, Madan B, Laffan M, Yu H, Vettermann C, Pierce GF, Wong WY, Pasi KJ. AAV5-Factor VIII Gene Transfer in Severe Hemophilia A. N Engl J Med. 2017 Dec 28;377(26):2519-2530. doi: 10.1056/NEJMoa1708483. Epub 2017 Dec 9.

Drugs

Evaluation	Drug	Modality	Dose	Route
Subject	valoctocogene roxaparvovec	Gene therapy (AAV / viral vector)	6e+12 vg/kg	Intravenous
Subject	valoctocogene roxaparvovec	Gene therapy (AAV / viral vector)	2e+13 vg/kg	Intravenous
Subject	valoctocogene roxaparvovec	Gene therapy (AAV / viral vector)	4e+13 vg/kg	Intravenous
Subject	valoctocogene roxaparvovec	Gene therapy (AAV / viral vector)	6e+13 vg/kg	Intravenous

Indications