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A Safety Study of Intravenous Immunoglobulin in Patients With Chronic Immune Thrombocytopenic Purpura (ITP)

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

Clinical Trial Summary

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.

Clinical Trial Description

n/a

Study Design

Endpoint Classification: Safety Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT01390649
Study type Interventional
Source CSL Behring
Contact
Status Completed
Phase Phase 4
Start date November 2011
Completion date September 2014
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