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Efficacy and Safety of BT200 - an aptamer that inhibits the interaction of von Willebrand factor and platelets (rondoraptivon pegol) - in Patients with Type 2B von Willebrand disease. In this disease the binding affinity of von Willebrand factor to platelets is increased, which typically results in low plasma concentrations of Willebrand factor and low platelet counts. The clinical phenotype, however, is quite heterogenous.

Efficacy and Safety of BT200 (rondoraptivon pegol) in Patients with Type 2B von Willebrand disease

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
EU CTR
Registry ID
EUCTR2023-000044-34-AT
Enrollment
6
Registered
2023-06-19
Start date
2024-08-14
Completion date
Unknown
Last updated
2025-09-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

patients with type 2B Von Willebrand Disease with thrombocytopenia MedDRA version: 20.0 Level: PT Classification code 10047715 Term: Von Willebrand's disease System Organ Class: 10010331 - Congenital, familial and genetic disorders

Interventions

Product Name: rondoraptivon pegol Product Code: BT200 Pharmaceutical Form: Solution for injection INN or Proposed INN: Rondoraptivon pegol Current Sponsor code: BT200 Other descriptive name: Poly(oxy-

Sponsors

Medical University of Vienna, Department of Clinical Pharmacology
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Type 2B VWD with thrombocytopenia and a recent bleeding history 2. repeated thrombocytopenia in medical history 3. =18 years old 4. Able to comprehend and to give informed consent 5. Able to cooperate with the Investigator, to comply with the requirements of the study, and to complete the full sequence of protocol-related procedures Are the trial subjects under 18? no Number of subjects for this age range: F.1.2 Adults (18-64 years) yes F.1.2.1 Number of subjects for this age range 5 F.1.3 Elderly (>=65 years) yes F.1.3.1 Number of subjects for this age range 1

Exclusion criteria

Exclusion criteria: 1. Clinically significant medical history or ongoing chronic illness that would jeopardise the safety of the patient or compromise the quality of the data derived from his/her participation in this study 2. History of significant drug allergy or anaphylactic reactions 3. Substance abuse, mental illness, or any reason that makes it unlikely in the judgment of the Investigator for the patient to be able to comply fully with study procedures 4. Use of medication during 2 weeks before the start of the study, which in the judgment of the Investigator may adversely affect the patient’s welfare or the integrity of the study’s results 5. Concurrent treatment with other experimental drugs or participation in another clinical trial with any investigational drug within 30 days or 5 elimination half-lives (whichever is longer) prior to treatment start

Design outcomes

Primary

MeasureTime frame
Main Objective: To examine the effects of BT200 on platelet count, VWF indices, FVIII and bleeding in type 2B VWD ;Secondary Objective: The secondary objective of this study is to assess the pharmacokinetic (PK)/pharmacodynamic (PD) relationship for BT200 in patients with type 2B VWD. To further evaluate the safety and tolerability of BT200 in patients with type 2B VWD. ;Primary end point(s): Co-Primary endpoints: Platelet counts, number of monthly bleedings events ;Timepoint(s) of evaluation of this end point: blood will be collected on day 1 (=baseline), day 29, day 57, day 85 and the platelet counts will be quantified. bleeding assessments will be done during the active study period of approximately 3 months

Secondary

MeasureTime frame
Secondary end point(s): Pharmacokinetics: • BT200 concentrations (and derived PK parameters) • Half-life of the substituted Factor VIII product used with and without BT200 (pop-PK-sub-study) Pharmacodynamics: • VWF antigen (VWF Ag) • VWF:ristocetin co-factor assay (VWF:RCo) • VWF activity (VWF:GpIbM assay) • VWF collagen binding assay (VWF:CBA) • Enzyme-linked immunosorbent assay (ELISA) for unbound VWF A1 domain (REAADS®) • Whole blood ristocetin induced platelet aggregation (Multiplate®) • Collagen Adenosine Diphosphate closure times measured by the platelet function analyser (PFA-100®) ;Timepoint(s) of evaluation of this end point: blood will be collected on day 1 (=baseline), day 29, day 57, day 85 and the platelet counts will be quantified. bleeding assessments will be done during the active study period of approximately 3 months

Countries

Austria

Contacts

Public ContactOffice of the Department

Medical University of Vienna, Department of Clinical Pharmacology

klin-pharmakologie@meduniwien.ac.at+4314040029810

Outcome results

None listed

Source: EU CTR (via WHO ICTRP) · Data processed: Feb 4, 2026