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A Longitudinal 2-year Bone Marrow Study of Eltrombopag in Previously Treated Adults, With Chronic Immune (Idiopathic) Thrombocytopenic Purpura (ITP)

This study is ongoing, but not recruiting participants.
Information provided by (Responsible Party):
GlaxoSmithKline Identifier:
First received: March 25, 2010
Last updated: February 7, 2013
Last verified: January 2013

A open-label, multi-center 2-year safety study to ascertain the baseline levels of bone marrow fibers in previously treated adults with chronic immune (idiopathic) thrombocytopenic purpura (ITP) and to evaluate the long-term effect of eltrombopag on bone marrow fibers. The study will also describe the long-term safety and tolerability of oral eltrombopag treatment in subjects with chronic ITP.

Condition Intervention Phase
Purpura, Thrombocytopenic, Idiopathic
Drug: Eltrombopag olamine
Phase 4

Study Type: Interventional
Study Design: Endpoint Classification: Safety Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Longitudinal 2-year Bone Marrow Study of Eltrombopag Olamine (SB-497115-GR) in Previously Treated Adults, With Chronic Immune (Idiopathic) Thrombocytopenic Purpura (ITP)

Resource links provided by NLM:

Further study details as provided by GlaxoSmithKline:

Primary Outcome Measures:
  • The proportion of subjects with presence or absence of bone marrow fibers at baseline and a change from baseline after 1 year treatment. [ Time Frame: 1 year ] [ Designated as safety issue: Yes ]
  • The proportion of subjects with presence or absence of bone marrow fibers at baseline and a change from baseline after 2 years of treatment. [ Time Frame: 2 years ]

Secondary Outcome Measures:
  • Safety and tolerability parameters including clinical laboratory tests, and incidents of all adverse events. [ Time Frame: 2 years of treatment ] [ Designated as safety issue: Yes ]

Estimated Enrollment: 150
Study Start Date: May 2010
Estimated Study Completion Date: May 2015
Estimated Primary Completion Date: April 2015 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Open Label
Oral eltrombopag once daily, starting dose 50 mg (or 25 mg for subjects of East Asian ancestry).
Drug: Eltrombopag olamine
Thrombopoietin receptor agonist

Detailed Description:

This is a phase IV, open-label safety study, designed to determine baseline levels of bone marrow fibers in previously treated adults with chronic immune (idiopathic) thrombocytopenic purpura (ITP)and to evaluate the long-term effect of eltrombopag on bone marrow reticulin and/or collagen fibers.

The duration of the screening period is up to 8 weeks. Eltrombopag will be administered for at least 2-years followed by a 4-week follow-up period. Bone marrow biopsies will be performed at screening, after 1-year and 2-years of eltrombopag treatment, and at early withdrawal of treatment. The screening bone marrow biopsy should be performed within 8 weeks of planned start of study medication and the bone marrow biopsy block must be available for central laboratory processing.


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Subjects must have signed and dated a written informed consent and be able to understand and comply with protocol requirements and instructions.
  • Adults (≥18 years) diagnosed with chronic ITP according to the American Society for Hematology/British Committee for Standards in Hematology (ASH/BCSH) guidelines [George, 1996; BCSH, 2003; Provan, 2009]. In addition, a peripheral blood smear should support the diagnosis of ITP with no evidence of other disease causative of thrombocytopenia (e.g., pseudo thrombocytopenia, myelofibrosis). The physical examination should not suggest any disease, which may cause thrombocytopenia other than ITP.
  • Subjects must be physically eligible for serial bone marrow biopsies and must have a bone marrow biopsy performed during screening, and be willing to remain on the study for at least 2 years with annual bone marrow biopsies.
  • Subjects, who previously received eltrombopag or romiplostim, must have completed treatment with these therapies at least 6 months prior to the screening bone marrow biopsy.
  • Subjects must have the following clinical chemistry values:
  • ALT and AST < 2xULN;
  • Bilirubin <1.5xULN (except for Gilbert's Syndrome);
  • Subjects are practicing an acceptable method of contraception as specified in the protocol.
  • In France, subjects will be eligible for inclusion in this study, only if either affiliated to or a beneficiary of a social security category.

Exclusion Criteria:

  • Subjects with any clinically relevant abnormality, other than ITP, or any other medical condition or circumstance, which in the opinion of the investigator makes the subject unsuitable for participation in the study or suggests another primary diagnosis (e.g., thrombocytopenia is secondary to another disease).
  • Subjects with any concurrent malignant disease and/or a recent history of cancer treatment with systemic chemotherapy and/or radiotherapy.

Exception: Subjects with a history of completely resected non-melanoma skin cancer or successfully treated in situ carcinoma are eligible.

  • Subjects with any prior history of arterial or venous thrombosis (stroke, transient ischemic attack, myocardial infarction, deep vein thrombosis or pulmonary embolism), AND ≥ two of the following risk factors: hormone replacement therapy, systemic contraception (containing estrogen), smoking, diabetes, hypercholesterolemia, hypertension, cancer, hereditary thrombophilic disorders (e.g., Factor V Leiden, ATIII deficiency, etc), or any family history of arterial or venous thrombosis.
  • Subjects with screening bone marrow fibers of either MF Grade 3 using European Consensus scale or Grade 4 using Bauermeister scale.
  • Subjects with a QTc >450 msec or > 480 msec for subjects with Bundle Branch Block.
  • Female subjects who are nursing or pregnant (positive serum or urine β-human chorionic gonadotrophin (β-hCG) pregnancy test) at screening.
  • Subjects treated with an investigational drug (other than a thrombopopoetin-receptor (TPO-R) agonist) within 30 days or five half-lives (whichever is longer) preceding the first dose of eltrombopag in the study. (For romiplostim or eltrombopag, see inclusion criterion #4).
  • Subjects treated with any TPO-R agonist other than romiplostim or eltrombopag.
  • Subjects with recent history of alcohol/drug abuse as determined by the investigator.
  Contacts and Locations
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Please refer to this study by its identifier: NCT01098487

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Sponsors and Collaborators
Study Director: GSK Clinical Trials GlaxoSmithKline
  More Information

No publications provided by GlaxoSmithKline

Additional publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: GlaxoSmithKline Identifier: NCT01098487     History of Changes
Other Study ID Numbers: 112940
Study First Received: March 25, 2010
Last Updated: February 7, 2013
Health Authority: Hong Kong: Department of Health
Korea: Korea Food & Drug Administration
United States: Food and Drug Administration

Keywords provided by GlaxoSmithKline:
eltrombopag olamine
thrombopoietin receptor agonist
Immune (idiopathic) thrombocytopenic purpura (ITP)
bone marrow fibers

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 February 26, 2015