Amgen Megakaryopoiesis Protein 2 (AMG 531) in Thrombocytopenic Subjects With Immune Thrombocytopenic Purpura (ITP)

This study has been completed.
Information provided by:
Amgen Identifier:
First received: June 30, 2005
Last updated: May 21, 2009
Last verified: May 2009
The purpose of this study is to assess the safety, tolerability, and utility of AMG 531 unit dosing (µg) in thrombocytopenic subjects with ITP.

Condition Intervention Phase
Thrombocytopenic Purpura
Drug: AMG 531
Phase 1
Phase 2

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Safety Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: An Open-Label, Unit Dose-Finding Study Evaluating the Safety and Efficacy of Amgen Megakaryopoiesis Protein 2 (AMG 531) in Thrombocytopenic Subjects With Immune Thrombocytopenic Purpura (ITP)

Resource links provided by NLM:

Further study details as provided by Amgen:

Primary Outcome Measures:
  • Safety as measured by the incidence and severity of all adverse events and the evaluation of antibody status.

Secondary Outcome Measures:
  • Proportion of subjects achieving targeted platelet level (doubling of baseline platelet count and within 50 x 10^9/L to 450 x 10^9/L)
  • Proportion of subjects achieving specified increases and peak counts
  • Peak count and time to peak
  • Change from baseline
  • Duration within targeted range


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Inclusion Criteria: - Greater than or equal to 3 months history if ITP, regardless of splenectomy status, and completion of at least 1 prior treatment for ITP - 2 of 3 pretreatment platelet counts that were less than 30 x 10^9/L (if not currently on ITP therapy) or less than 50 x 10^9/L (if currently receiving corticosteroids for ITP therapy) - Ability to give informed consent Exclusion Criteria: - Known history of arterial thrombosis, active malignancy, or bone marrow stem cell disorder
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00117143

Sponsors and Collaborators
Study Director: MD Amgen
  More Information

Additional Information:
Responsible Party: Global Development Leader, Amgen Inc. Identifier: NCT00117143     History of Changes
Other Study ID Numbers: 20010218 
Study First Received: June 30, 2005
Last Updated: May 21, 2009
Health Authority: France: Afssaps - Agence française de sécurité sanitaire des produits de santé (Saint-Denis)

Keywords provided by Amgen:
Immune Thrombocytopenic Purpura
Idiopathic Thrombocytopenic Purpura

Additional relevant MeSH terms:
Purpura, Thrombocytopenic
Purpura, Thrombocytopenic, Idiopathic
Autoimmune Diseases
Blood Coagulation Disorders
Blood Platelet Disorders
Hematologic Diseases
Hemorrhagic Disorders
Immune System Diseases
Pathologic Processes
Signs and Symptoms
Skin Manifestations
Thrombotic Microangiopathies processed this record on May 30, 2016