. New research from first-in-class marketed and investigational therapies in hemophilia, immune thrombocytopenia and acquired thrombotic thrombocytopenic purpura will be presented
July 2, 2021

Clinical data and new research from Sanofi’s rare blood disorders portfolio of marketed and investigational therapies for people with hemophilia, immune thrombocytopenia (ITP) and acquired thrombotic thrombocytopenic purpura (aTTP) will be presented at the International Society on Thrombosis and Haemostasis (ISTH) 2021 Virtual Congress, July 17-21, 2021.

“Breaking barriers for people living with rare blood disorders requires that we push ourselves to transform the therapeutic landscape,” said Karin Knobe, MD, PhD, Head of Development, Rare Diseases and Rare Blood Disorders at Sanofi. “We deliver on that promise with our robust portfolio and pipeline of novel technologies that are designed to help address the underlying conditions or unmet needs for people with debilitating rare blood disorders. At ISTH, we are sharing data across all our innovative approaches and collectively, the data reinforce how our pipeline and portfolio may unlock new possibilities in the treatment of rare blood disorders.”

Breaking barriers in hemophilia: helping to evolve the treatment paradigm

Hemophilia is a rare, genetic bleeding disorder in which a person’s blood does not clot properly. Despite advances in treatment options in recent years, limitations still exist. Sanofi’s two marketed extended half-life factor replacement therapies shifted a two-decades-old treatment paradigm when launched in 2014. Today, with the molecules in its hemophilia pipeline, Sanofi is focused on delivering potential first-in-class and best-in-class therapies with the goal of bringing efficacy and convenience to a new level for patients.

Fitusiran is an investigational, subcutaneously administered small interference RNA therapy in development for the treatment of people with hemophilia A or B, with or without inhibitors and has the potential to transform treatment as it would be the only prophylactic therapy with as few as six injections per year. Population pharmacokinetic and pharmacodynamic modeling data to characterize the antithrombin (AT) lowering dynamics in hemophilia patients treated with fitusiran will be shared in a poster presentation. These data support the revised fitusiran dose and dosing regimen implemented in the ongoing adult and adolescent studies.

Abstract # PB0526 Fitusiran population pharmacokinetic and pharmacodynamic (PopPK/PD) modeling to support revised dose, dosing regimens and dose mitigation scheme. ePoster

New research will also be presented on Eloctate® Antihemophilic Factor (Recombinant), Fc Fusion Protein, Sanofi’s extended half-life factor VIII therapy for people with hemophilia A. Sanofi collaborates on the development and commercialization of Eloctate with Sobi, a global biopharmaceutical company.

Abstract # PB0518 Treatment patterns and clinical outcomes among patients with hemophilia A treated with factor VIII replacement therapies and nonfactor therapy: an assessment of US real-world data. ePoster
Abstract #PB0578 Evaluating the effectiveness of recombinant factor VIII Fc fusion protein (rFVIIIFc) in adolescents and children with hemophilia A in the real world in Japan: interim analysis of the multicenter, observational Fc Adolescent and Children Treatment study (FACTs). ePoster
Abstract # PB0522 Final results of ReITIrate - a prospective study of rescue immune tolerance induction (ITI) with recombinant factor VIII Fc (rFVIIIFc) in patients who have failed previous ITI attempts (Joint with Sobi). ePoster
Abstract # OC48.2 Transplacental delivery of recombinant Fc-fused factor VIII (rFVIIIFc) in FVIII-deficient mice (ESC). Investigator Sponsored Study. Oral presentation
Charting a new course in ITP and aTTP

ITP is an acquired autoimmune blood disorder characterized by immune-mediated platelet
destruction and impairment of platelet production, which leads to thrombocytopenia, a predisposition to bleeding, and altered quality of life for patients. There remains a need in relapsed/refractory ITP patients failing to maintain their platelet counts with the current therapies.

Rilzabrutinib is an investigational Bruton’s tyrosine kinase (BTK) inhibitor incorporating Sanofi’s TAILORED COVALENCY® technology that is in development for the treatment of ITP. Interim Phase 1/2 study data will be presented at ISTH.

Abstract # OC72.2 Phase I/II ongoing study of rilzabrutinib, an oral Bruton tyrosine kinase (BTK) inhibitor, in immune thrombocytopenia (ITP): extended follow-up and long-term analyses with optimal dose. Oral Presentation

Acquired TTP is a rare, life-threatening, autoimmune blood clotting disorder and is considered a medical emergency. New research will be shared on Cablivi® (caplacizumab-yhdp), a von Willebrand Factor-directed antibody fragment treatment indicated for use in combination with plasma exchange and immunosuppressive therapy for adult patients with aTTP.

Abstract # PB0838 Caplacizumab rapidly inhibits VWF-platelet interaction: pharmacodynamic data from healthy volunteers and patients with aTTP. ePoster

Abstract # PB0851 PK/PD modeling and simulations highlight the importance of the intravenous loading dose and daily dosing regimen with caplacizumab for patients with aTTP. ePoster

About the Sanofi and Sobi collaboration: Sanofi and Sobi collaborate on the development and commercialization of Eloctate®/Elocta® and Alprolix®. Sobi has final development and commercialization rights in the Sobi territory (essentially Europe, North Africa, Russia, and most Middle Eastern markets). Sanofi has final development and commercialization rights in North America and all other regions in the world excluding the Sobi territory and has manufacturing responsibility for Eloctate/Elocta and Alprolix. In September 2019, Sobi exercised early opt-in for the development and commercialization of efanesoctocog alfa, an investigational factor VIII therapy with the potential to provide extended protection from bleeds with once-weekly dosing for people with hemophilia A.