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Young G, Srivastava A, Kavakli K, Ross C, Sathar J, You CW, Tran H, Sun J, Wu R, Poloskey S, Qiu Z, Kichou S, Andersson S, Mei B, Rangarajan S. Efficacy and safety of fitusiran prophylaxis in people with haemophilia A or haemophilia B with inhibitors (ATLAS-INH): a multicentre, open-label, randomised phase 3 trial. Lancet 2023; 401:1427-1437. [PMID: 37003287 DOI: 10.1016/s0140-6736(23)00284-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 12/05/2022] [Accepted: 02/01/2023] [Indexed: 04/03/2023]
Abstract
BACKGROUND Fitusiran, a subcutaneous investigational small interfering RNA therapeutic, targets antithrombin to rebalance haemostasis in people with haemophilia A or haemophilia B, irrespective of inhibitor status. We evaluated the efficacy and safety of fitusiran prophylaxis in people with haemophilia A or haemophilia B with inhibitors. METHODS This multicentre, randomised, open-label phase 3 study was done at 26 sites (primarily secondary or tertiary centres) in 12 countries. Men, boys, and young adults aged 12 years or older with severe haemophilia A or haemophilia B with inhibitors previously treated with on-demand bypassing agents were randomly assigned (2:1) to receive once-a-month 80 mg subcutaneous fitusiran prophylaxis (fitusiran prophylaxis group) or to continue with bypassing agents on-demand (bypassing agents on-demand group) for 9 months. The primary endpoint was mean annualised bleeding rate during the efficacy period in the intention-to-treat population estimated by negative binomial model. Safety was assessed as a secondary endpoint in the safety population. This trial is complete and is registered with ClinicalTrials.gov, NCT03417102. FINDINGS Between Feb 14, 2018, and June 23, 2021, 85 participants were screened for inclusion, of whom 57 (67%; 57 [100%] men; median age 27·0 years [IQR 19·5-33·5]) were randomly assigned: 19 (33%) participants to the bypassing agent on-demand group and 38 (67%) participants to the fitusiran prophylaxis. Negative binomial model-based mean annualised bleeding rate was significantly lower in the fitusiran prophylaxis group (1·7 [95% CI 1·0-2·7]) than in the bypassing agents on-demand group (18·1 [10·6-30·8]), corresponding to a 90·8% (95% CI 80·8-95·6) reduction in annualised bleeding rate in favour of fitusiran prophylaxis (p<0·0001). 25 (66%) participants had zero treated bleeds in the fitusiran prophylaxis group versus one (5%) in the bypassing agents on-demand group. The most frequent treatment-emergent adverse event in the fitusiran prophylaxis group was increased alanine aminotransferase in 13 (32%) of 41 participants in the safety population; there were no increased alanine aminotransferase treatment-emergent adverse events in the bypassing agents on-demand group. Suspected or confirmed thromboembolic events were reported in two (5%) participants in the fitusiran prophylaxis group. No deaths were reported. INTERPRETATION Subcutaneous fitusiran prophylaxis resulted in statistically significant reductions in annualised bleeding rate in participants with haemophilia A or haemophilia B with inhibitors, with two-thirds of participants having zero bleeds. Fitusiran prophylaxis might show haemostatic efficacy in participants with haemophilia A or haemophilia B with inhibitors; therefore, the therapeutic might have the potential to improve the management of people with haemophilia. FUNDING Sanofi.
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Affiliation(s)
- Guy Young
- Hemostasis and Thrombosis Center, Cancer and Blood Disease Institute, Children's Hospital Los Angeles, University of Southern California, Los Angeles, CA, USA.
| | - Alok Srivastava
- Department of Haematology, Christian Medical College & Centre for Stem Cell Research, a unit of inStem, Bengaluru, Christian Medical College Campus, Vellore, India
| | - Kaan Kavakli
- Department of Pediatric Hematology and Oncology, Ege University Faculty of Medicine Children's Hospital, Izmir, Turkey
| | - Cecil Ross
- Department of Hematology, St John's Medical College Hospital, Bangalore, India
| | - Jameela Sathar
- Department of Haematology, Ampang Hospital, Kuala Lumpur, Malaysia
| | - Chur-Woo You
- Department of Pediatrics, Eulji University School of Medicine, Seoul, South Korea
| | - Huyen Tran
- Ronald Sawers Hemophilia Treatment Center, The Alfred, Monash University, Melbourne, Victoria, Australia
| | - Jing Sun
- Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Runhui Wu
- National Center for Children's Health, Beijing Children's Hospital, Beijing, China
| | - Stacey Poloskey
- Pharmacovigilance, Sanofi, Cambridge, MA, USA; Clinical Development, Sanofi, Cambridge, MA, USA
| | - Zhiying Qiu
- Biostatistics & Programming, Sanofi, Bridgewater, NJ, USA
| | | | | | - Baisong Mei
- Clinical Development, Sanofi, Cambridge, MA, USA
| | - Savita Rangarajan
- Advanced Centre for Oncology, Haematology & Rare Diseases KJ Somaiya Super Specialty, Hospital, Mumbai, India; Faculty of Medicine, University of Southampton, Southampton, UK
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von Drygalski A, Chowdary P, Kulkarni R, Susen S, Konkle BA, Oldenburg J, Matino D, Klamroth R, Weyand AC, Jimenez-Yuste V, Nogami K, Poloskey S, Winding B, Willemze A, Knobe K. Efanesoctocog Alfa Prophylaxis for Patients with Severe Hemophilia A. N Engl J Med 2023; 388:310-318. [PMID: 36720133 DOI: 10.1056/nejmoa2209226] [Citation(s) in RCA: 40] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND Efanesoctocog alfa provides high sustained factor VIII activity by overcoming the von Willebrand factor-imposed half-life ceiling. The efficacy, safety, and pharmacokinetics of efanesoctocog alfa for prophylaxis and treatment of bleeding episodes in previously treated patients with severe hemophilia A are unclear. METHODS We conducted a phase 3 study involving patients 12 years of age or older with severe hemophilia A. In group A, patients received once-weekly prophylaxis with efanesoctocog alfa (50 IU per kilogram of body weight) for 52 weeks. In group B, patients received on-demand treatment with efanesoctocog alfa for 26 weeks, followed by once-weekly prophylaxis with efanesoctocog alfa for 26 weeks. The primary end point was the mean annualized bleeding rate in group A; the key secondary end point was an intrapatient comparison of the annualized bleeding rate during prophylaxis in group A with the rate during prestudy factor VIII prophylaxis. Additional end points included treatment of bleeding episodes, safety, pharmacokinetics, and changes in physical health, pain, and joint health. RESULTS In group A (133 patients), the median annualized bleeding rate was 0 (interquartile range, 0 to 1.04), and the estimated mean annualized bleeding rate was 0.71 (95% confidence interval [CI], 0.52 to 0.97). The mean annualized bleeding rate decreased from 2.96 (95% CI, 2.00 to 4.37) to 0.69 (95% CI, 0.43 to 1.11), a finding that showed superiority over prestudy factor VIII prophylaxis (P<0.001). A total of 26 patients were enrolled in group B. In the overall population, nearly all bleeding episodes (97%) resolved with one injection of efanesoctocog alfa. Weekly prophylaxis with efanesoctocog alfa provided mean factor VIII activity of more than 40 IU per deciliter for the majority of the week and of 15 IU per deciliter at day 7. Prophylaxis with efanesoctocog alfa for 52 weeks (group A) improved physical health (P<0.001), pain intensity (P = 0.03), and joint health (P = 0.01). In the overall study population, efanesoctocog alfa had an acceptable side-effect profile, and the development of inhibitors to factor VIII was not detected. CONCLUSIONS In patients with severe hemophilia A, once-weekly efanesoctocog alfa provided superior bleeding prevention to prestudy prophylaxis, normal to near-normal factor VIII activity, and improvements in physical health, pain, and joint health. (Funded by Sanofi and Sobi; XTEND-1 ClinicalTrials.gov number, NCT04161495.).
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Affiliation(s)
- Annette von Drygalski
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Pratima Chowdary
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Roshni Kulkarni
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Sophie Susen
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Barbara A Konkle
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Johannes Oldenburg
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Davide Matino
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Robert Klamroth
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Angela C Weyand
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Victor Jimenez-Yuste
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Keiji Nogami
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Stacey Poloskey
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Bent Winding
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Annemieke Willemze
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
| | - Karin Knobe
- From the Division of Hematology and Oncology, Department of Medicine, University of California, San Diego, San Diego (A.D.); the Katharine Dormandy Haemophilia and Thrombosis Centre, Royal Free Hospital, London (P.C.); Michigan State University, East Lansing (R. Kulkarni); Centre Hospitalier Universitaire de Lille, Université de Lille, Lille (S.S.), and Sanofi, Chilly-Mazarin (K.K.) - both in France; the Washington Center for Bleeding Disorders and the University of Washington - both in Seattle (B.A.K.); the Institute of Experimental Hematology and Transfusion Medicine, Universitätsklinikum Bonn, Bonn (J.O.), and Vivantes Klinikum im Friedrichshain, Berlin (R. Klamroth) - both in Germany; the Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada (D.M.); the Division of Hematology-Oncology, Department of Pediatrics, University of Michigan, Ann Arbor (A.C.W.); Hospital Universitario La Paz, Autónoma University, Madrid (V.J.-Y.); Nara Medical University, Nara, Japan (K.N.); Sanofi, Cambridge, MA (S.P.); Sobi, Stockholm (B.W.); and Sanofi, Amsterdam (A.W.)
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Konkle BA, Shapiro AD, Quon DV, Staber JM, Kulkarni R, Ragni MV, Chhabra ES, Poloskey S, Rice K, Katragadda S, Fruebis J, Benson CC. BIVV001 Fusion Protein as Factor VIII Replacement Therapy for Hemophilia A. N Engl J Med 2020; 383:1018-1027. [PMID: 32905674 DOI: 10.1056/nejmoa2002699] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND Factor VIII replacement products have improved the care of patients with hemophilia A, but the short half-life of these products affects the patients' quality of life. The half-life of recombinant factor VIII ranges from 15 to 19 hours because of the von Willebrand factor chaperone effect. BIVV001 (rFVIIIFc-VWF-XTEN) is a novel fusion protein designed to overcome this half-life ceiling and maintain high sustained factor VIII activity levels. Data are lacking on the safety and pharmacokinetics of single-dose BIVV001. METHODS In this phase 1-2a open-label trial, we consecutively assigned 16 previously treated men (18 to 65 years of age) with severe hemophilia A (factor VIII activity, <1%) to receive a single intravenous injection of recombinant factor VIII at a dose of 25 IU per kilogram of body weight (lower-dose group) or 65 IU per kilogram (higher-dose group). This injection was followed by a washout period of at least 3 days. The patients then received a single intravenous injection of BIVV001 at the same corresponding dose of either 25 IU or 65 IU per kilogram. Adverse events and pharmacokinetic measurements were assessed. RESULTS No inhibitors to factor VIII were detected and no hypersensitivity or anaphylaxis events were reported up to 28 days after the injection of single-dose BIVV001. The geometric mean half-life of BIVV001 was three to four times as long as that of recombinant factor VIII (37.6 hours vs. 9.1 hours in the lower-dose group and 42.5 vs. 13.2 hours in the higher-dose group); the area under the curve (AUC) for product exposure was six to seven times as great in the two dose groups (4470 hours vs. 638 hours × IU per deciliter in the lower-dose group and 12,800 hours vs. 1960 hours × IU per deciliter in the higher-dose group). After the injection of BIVV001 in the higher-dose group, the mean factor VIII level was in the normal range (≥51%) for 4 days and 17% at day 7, which suggested the possibility of a weekly interval between treatments. CONCLUSIONS In a small, early-phase study involving men with severe hemophilia A, a single intravenous injection of BIVV001 resulted in high sustained factor VIII activity levels, with a half-life that was up to four times the half-life associated with recombinant factor VIII, an increase that could signal a new class of factor VIII replacement therapy with a weekly treatment interval. No safety concerns were reported during the 28-day period after administration. (Funded by Sanofi and Sobi; ClinicalTrials.gov number, NCT03205163.).
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Affiliation(s)
- Barbara A Konkle
- From Bloodworks Northwest and the University of Washington, Seattle (B.A.K.); Indiana Hemophilia and Thrombosis Center, Indianapolis (A.D.S.); the Orthopaedic Hemophilia Treatment Center, Los Angeles (D.V.Q.); the University of Iowa, Iowa City (J.M.S.); Michigan State University, East Lansing (R.K.); the Department of Medicine, University of Pittsburgh, and the Hemophilia Center of Western Pennsylvania, Pittsburgh (M.V.R.); and Sanofi (E.S.C., S.P., S.K., C.C.B.) and Bioverativ (K.R., J.F.) - both in Waltham, MA
| | - Amy D Shapiro
- From Bloodworks Northwest and the University of Washington, Seattle (B.A.K.); Indiana Hemophilia and Thrombosis Center, Indianapolis (A.D.S.); the Orthopaedic Hemophilia Treatment Center, Los Angeles (D.V.Q.); the University of Iowa, Iowa City (J.M.S.); Michigan State University, East Lansing (R.K.); the Department of Medicine, University of Pittsburgh, and the Hemophilia Center of Western Pennsylvania, Pittsburgh (M.V.R.); and Sanofi (E.S.C., S.P., S.K., C.C.B.) and Bioverativ (K.R., J.F.) - both in Waltham, MA
| | - Doris V Quon
- From Bloodworks Northwest and the University of Washington, Seattle (B.A.K.); Indiana Hemophilia and Thrombosis Center, Indianapolis (A.D.S.); the Orthopaedic Hemophilia Treatment Center, Los Angeles (D.V.Q.); the University of Iowa, Iowa City (J.M.S.); Michigan State University, East Lansing (R.K.); the Department of Medicine, University of Pittsburgh, and the Hemophilia Center of Western Pennsylvania, Pittsburgh (M.V.R.); and Sanofi (E.S.C., S.P., S.K., C.C.B.) and Bioverativ (K.R., J.F.) - both in Waltham, MA
| | - Janice M Staber
- From Bloodworks Northwest and the University of Washington, Seattle (B.A.K.); Indiana Hemophilia and Thrombosis Center, Indianapolis (A.D.S.); the Orthopaedic Hemophilia Treatment Center, Los Angeles (D.V.Q.); the University of Iowa, Iowa City (J.M.S.); Michigan State University, East Lansing (R.K.); the Department of Medicine, University of Pittsburgh, and the Hemophilia Center of Western Pennsylvania, Pittsburgh (M.V.R.); and Sanofi (E.S.C., S.P., S.K., C.C.B.) and Bioverativ (K.R., J.F.) - both in Waltham, MA
| | - Roshni Kulkarni
- From Bloodworks Northwest and the University of Washington, Seattle (B.A.K.); Indiana Hemophilia and Thrombosis Center, Indianapolis (A.D.S.); the Orthopaedic Hemophilia Treatment Center, Los Angeles (D.V.Q.); the University of Iowa, Iowa City (J.M.S.); Michigan State University, East Lansing (R.K.); the Department of Medicine, University of Pittsburgh, and the Hemophilia Center of Western Pennsylvania, Pittsburgh (M.V.R.); and Sanofi (E.S.C., S.P., S.K., C.C.B.) and Bioverativ (K.R., J.F.) - both in Waltham, MA
| | - Margaret V Ragni
- From Bloodworks Northwest and the University of Washington, Seattle (B.A.K.); Indiana Hemophilia and Thrombosis Center, Indianapolis (A.D.S.); the Orthopaedic Hemophilia Treatment Center, Los Angeles (D.V.Q.); the University of Iowa, Iowa City (J.M.S.); Michigan State University, East Lansing (R.K.); the Department of Medicine, University of Pittsburgh, and the Hemophilia Center of Western Pennsylvania, Pittsburgh (M.V.R.); and Sanofi (E.S.C., S.P., S.K., C.C.B.) and Bioverativ (K.R., J.F.) - both in Waltham, MA
| | - Ekta S Chhabra
- From Bloodworks Northwest and the University of Washington, Seattle (B.A.K.); Indiana Hemophilia and Thrombosis Center, Indianapolis (A.D.S.); the Orthopaedic Hemophilia Treatment Center, Los Angeles (D.V.Q.); the University of Iowa, Iowa City (J.M.S.); Michigan State University, East Lansing (R.K.); the Department of Medicine, University of Pittsburgh, and the Hemophilia Center of Western Pennsylvania, Pittsburgh (M.V.R.); and Sanofi (E.S.C., S.P., S.K., C.C.B.) and Bioverativ (K.R., J.F.) - both in Waltham, MA
| | - Stacey Poloskey
- From Bloodworks Northwest and the University of Washington, Seattle (B.A.K.); Indiana Hemophilia and Thrombosis Center, Indianapolis (A.D.S.); the Orthopaedic Hemophilia Treatment Center, Los Angeles (D.V.Q.); the University of Iowa, Iowa City (J.M.S.); Michigan State University, East Lansing (R.K.); the Department of Medicine, University of Pittsburgh, and the Hemophilia Center of Western Pennsylvania, Pittsburgh (M.V.R.); and Sanofi (E.S.C., S.P., S.K., C.C.B.) and Bioverativ (K.R., J.F.) - both in Waltham, MA
| | - Kara Rice
- From Bloodworks Northwest and the University of Washington, Seattle (B.A.K.); Indiana Hemophilia and Thrombosis Center, Indianapolis (A.D.S.); the Orthopaedic Hemophilia Treatment Center, Los Angeles (D.V.Q.); the University of Iowa, Iowa City (J.M.S.); Michigan State University, East Lansing (R.K.); the Department of Medicine, University of Pittsburgh, and the Hemophilia Center of Western Pennsylvania, Pittsburgh (M.V.R.); and Sanofi (E.S.C., S.P., S.K., C.C.B.) and Bioverativ (K.R., J.F.) - both in Waltham, MA
| | - Suresh Katragadda
- From Bloodworks Northwest and the University of Washington, Seattle (B.A.K.); Indiana Hemophilia and Thrombosis Center, Indianapolis (A.D.S.); the Orthopaedic Hemophilia Treatment Center, Los Angeles (D.V.Q.); the University of Iowa, Iowa City (J.M.S.); Michigan State University, East Lansing (R.K.); the Department of Medicine, University of Pittsburgh, and the Hemophilia Center of Western Pennsylvania, Pittsburgh (M.V.R.); and Sanofi (E.S.C., S.P., S.K., C.C.B.) and Bioverativ (K.R., J.F.) - both in Waltham, MA
| | - Joachim Fruebis
- From Bloodworks Northwest and the University of Washington, Seattle (B.A.K.); Indiana Hemophilia and Thrombosis Center, Indianapolis (A.D.S.); the Orthopaedic Hemophilia Treatment Center, Los Angeles (D.V.Q.); the University of Iowa, Iowa City (J.M.S.); Michigan State University, East Lansing (R.K.); the Department of Medicine, University of Pittsburgh, and the Hemophilia Center of Western Pennsylvania, Pittsburgh (M.V.R.); and Sanofi (E.S.C., S.P., S.K., C.C.B.) and Bioverativ (K.R., J.F.) - both in Waltham, MA
| | - Craig C Benson
- From Bloodworks Northwest and the University of Washington, Seattle (B.A.K.); Indiana Hemophilia and Thrombosis Center, Indianapolis (A.D.S.); the Orthopaedic Hemophilia Treatment Center, Los Angeles (D.V.Q.); the University of Iowa, Iowa City (J.M.S.); Michigan State University, East Lansing (R.K.); the Department of Medicine, University of Pittsburgh, and the Hemophilia Center of Western Pennsylvania, Pittsburgh (M.V.R.); and Sanofi (E.S.C., S.P., S.K., C.C.B.) and Bioverativ (K.R., J.F.) - both in Waltham, MA
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