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.

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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.

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35598604 [ View in PubMed
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Abstract

BACKGROUND: A novel, engineered, liver-tropic adeno-associated virus vector expressing a hyperactive Padua factor IX (FIX) protein (BBM-H901) has been developed and is promising for haemophilia B gene therapy. We aimed to explore its safety and activity in increasing FIX concentrations and reducing bleeding frequency. METHODS: We did a single-centre, single-arm, phase 1, pilot trial evaluating the safety and activity of a single intravenous infusion of BBM-H901 at the Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College (Tianjin, China). We enrolled adult patients with haemophilia B (aged >18 years) with baseline FIX coagulation activity (FIX:C) of less than 2 IU/dL, no FIX inhibitor, and low titre of neutralising antibodies (

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