Immune Thrombocytopenic Purpura Clinical Trial
Official title:
An Open-label, Prospective, Multicenter Study to Investigate the Specificity of in Vivo Antibody Binding to Red Blood Cells in Subjects With Chronic Immune Thrombocytopenic Purpura (ITP) Treated With IgPro10 (Privigen®) Who Have Shown Signs of Hemolysis
It is known that intravenous immunoglobulins can induce hemolysis, but the mechanism is not
known in detail. The primary objective of this study was to investigate the specificity of
antigens on red blood cells in patients with chronic immune thrombocytopenic purpura (ITP)
who have shown signs of clinically relevant hemolysis following treatment with the
intravenous immunoglobin Privigen®. The study was to explore potential mechanisms of
hemolysis by analysis of the specificity of the antibodies possibly involved. To distinguish
between clinically non-relevant hemolysis and a relevant intravascular hemolysis, an
independent adjudication by a committee was performed for each patient with signs of
hemolysis determined in the laboratory or in the clinic.
This study was requested as a post-marketing commitment study by the United States Food and
Drug Administration (FDA). By September 2014, no case of clinically significant
intravascular hemolysis was found, and the FDA agreed to halt the study and analyze all
hemolysis-relevant endpoints using FDA criteria for hemolysis in addition to analyses
planned in the protocol. The study was not restarted.
n/a
Endpoint Classification: Safety Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
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