1. Pharmacokinetics, Efficacy and Safety of a Plasma-Derived VWF/FVIII Concentrate (Formulation V) in Pediatric Patients with von Willebrand Disease (SWIFTLY-VWD Study)
- Author
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Irina Romashevskaya, Guenter Auerswald, Marta Julia Lopez, Oleksandra Stasyshyn, Claudia Djambas Khayat, Wilfried Seifert, Tobias Rogosch, and Genadi Iosava
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medicine.medical_specialty ,congenital, hereditary, and neonatal diseases and abnormalities ,pediatrics ,030204 cardiovascular system & hematology ,Gastroenterology ,Journal of Blood Medicine ,03 medical and health sciences ,0302 clinical medicine ,Pharmacokinetics ,Von Willebrand factor ,Internal medicine ,hemic and lymphatic diseases ,Von Willebrand disease ,medicine ,Adverse effect ,Original Research ,von Willebrand factor-factor VIII concentrate ,Angioedema ,biology ,Plasma derived ,business.industry ,Incidence (epidemiology) ,clinical trial ,Hematology ,medicine.disease ,Clinical trial ,030220 oncology & carcinogenesis ,biology.protein ,prophylaxis ,medicine.symptom ,business ,von Willebrand disease - Abstract
Guenter Auerswald,1 Claudia Djambas Khayat,2 Oleksandra Stasyshyn,3 Genadi Iosava,4 Irina Romashevskaya,5 Marta Julia López,6 Wilfried Seifert,7 Tobias Rogosch7 1Hess Kinderklinik, Klinikum Bremen-Mitte, Bremen, Germany; 2Hotel Dieu de France Hospital, St Joseph University, Beirut, Lebanon; 3Institute of Blood Pathology and Transfusion Medicine, Academy of Medical Sciences of Ukraine, Lviv, Ukraine; 4Institute for Hematology and Transfusiology, Tbilisi, Georgia; 5Republican Research Centre for Radiation Medicine and Human Ecology, Gomel, Belarus; 6Hematology, Hospital Roosevelt, Guatemala, Guatemala; 7Clinical Development, CSL Behring, Marburg, GermanyCorrespondence: Guenter AuerswaldHess Kinderklinik, Klinikum Bremen-Mitte, Bremen, GermanyTel +49 176-10113362Email guenterauerswald@aol.comPurpose: Formulation V (VONCENTO®) is a plasma-derived high-concentration/low-volume, high-purity von Willebrand factor (VWF)/factor VIII (FVIII) concentrate, originally indicated for von Willebrand disease (VWD) in adults and adolescents. This multicenter, open-label study (SWIFTLY-VWD) evaluated the pharmacokinetics (PK), as well as hemostatic efficacy and safety, of Formulation V in pediatric patients (< 12 years) with severe VWD requiring treatment or prophylaxis of bleedings.Methods: PK investigations were performed following one dose of Formulation V at Day 1 and 180. Nonsurgical bleeds were analyzed, while hemostatic efficacy was graded as excellent/good/moderate/none. Safety assessments included adverse events, and presence of VWF and/or FVIII inhibitors.Results: Formulation V was administered as on-demand (N=13) or prophylaxis therapy (N=4) for 12 months (< 6 years, N=9; 6 to < 12 years, N=8). PK parameters for VWF markers were generally comparable to adults but showed lower VWF:ristocetin cofactor (RCo) exposure. Incidence of major bleeds was lower for prophylaxis (3.3%) than on-demand therapy (27.1%); joint bleeds were also lower (3.3% vs 11.5%, respectively). Investigator-reported excellent/good hemostatic efficacy against nonsurgical bleeds was 100%. No clinically relevant differences in PK, hemostatic efficacy, or safety were observed between age-groups (< 6 years and 6 to < 12 years). Formulation V was well tolerated. Adverse events were mild–moderate and consistent with the adult safety profile. No cases of anaphylactic reactions or angioedema, development of FVIII/VWF inhibitors, thromboembolic events, or viral infections were reported.Conclusion: This study provides evidence for use of Formulation V to treat and prevent bleeding in pediatric patients with severe VWD, and led to the European approval of Formulation V in children.Keywords: von Willebrand disease, clinical trial, pediatrics, prophylaxis, von Willebrand factor-factor VIII concentrate
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- 2020