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Efficacy and Safety of BT200 (Rondaptivon Pegol) in Patients With Type 2B Von Willebrand Disease

NCT07273721 · Status: RECRUITING · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 6

Last updated 2025-12-09

No results posted yet for this study

Summary

This randomized clinical trial with a cross-over design is being conducted at the Department of Clinical Pharmacology at the Medical University of Vienna, and a total of 4-6 patients with type 2B von Willebrand disease (VWD) will participate.

The main purpose of this clinical trial is to investigate the efficacy and safety of BT200, a new drug for thrombocytopenic patients with type 2B von Willebrand disease (VWD). Based on previous studies, we expect that this drug will inhibit the breakdown of von Willebrand factor (VWF) in small doses, leading to an increase in von Willebrand factor (VWF), platelet count, and factor VIII. This should also lead to a reduced tendency to bleed.

This study will begin with an observation phase and will then proceed in two periods of approximately 64 days each:

Placebo or BT200 will be administered subcutaneously at a dose of 12 mg on the first day of the study. After that, patients will self-administer the drug at a dose of 6 mg (0.4 mL) or placebo once a week for another 4 weeks starting the following week (a total of 4 times over a period of 4 weeks). During this time, they will be asked to come to our clinic for a follow-up visit.

After a "washout phase" lasting several weeks, during which patients do not receive the study drug/placebo but are asked to record any bleeding events, the second period begins on day 64:

BT200 or placebo is administered again, depending on what the patients received in the first period. Patients therefore receive the study drug for 4 weeks and placebo for 4 weeks; which is administered when is randomized; a follow-up examination also takes place during this period.

At the end of the second period, there is another "washout phase" lasting several weeks. On day 127, the final examination takes place at the clinic, after which patients have the opportunity to participate in an extension study (to be amended).

Conditions

  • Von Willebrand Disease (VWD), Type 2

Interventions

DRUG

BT200

Aptamer directed against the A1 domain of von Willebrand factor

DRUG

Placebo

Placebo for BT200

Sponsors & Collaborators

  • Medical University of Vienna

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-08-14
Primary Completion
2026-07-31
Completion
2026-07-31

Countries

  • Austria

Study Locations

More Related Trials

Entities

Drugs

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07273721 on ClinicalTrials.gov