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Phase 3 N=805 Randomized Double-blind Treatment

Eltrombopag To Initiate And Maintain Interferon Antiviral Treatment To Benefit Subjects With Hepatitis C Liver Disease

Hepatitis C, Chronic

Enrolled (actual)
805
Serious AEs
11.3%
Results posted
May 2012
Primary outcome: Primary: Number of Participants With Sustained Virologic Response (SVR) in the Double-blind (DB) Antiviral Treatment Phase — 32; 97 participants — p=0.0202

Study Design & Population

Study type
Interventional
Phase
Phase 3
Interventions
eltrombopag (Drug); placebo (Drug)
Age
Adult, Older Adult · 18+ yrs
Sex
All
Sponsor
GlaxoSmithKline
Primary completion
Aug 2011

Outcome Measures

OutcomeResultp-value
PRIMARY
Number of Participants With Sustained Virologic Response (SVR) in the Double-blind (DB) Antiviral Treatment Phase
32; 97 0.0202 sig
SECONDARY
Number of Participants Whose Platelet Count Increased From a Baseline Count of <75 Gi/L to a Count Greater Than or Equal to (>=) 100 Giga (10^9) Cells Per Liter (Gi/L) During the Open-label (OL) Pre-Antiviral Treatment Phase
773
SECONDARY
Number of Participants Receiving the Indicated Doses of Eltrombopag in the OL Phase Who Initiated Antiviral Therapy (Peginterferon Alfa-2a and Ribavirin) in the DB Phase
443; 208; 77; 31
SECONDARY
Median Platelet Count at the Indicated Time Points During the OL Phase
59.0; 58.0; 77.0; 93.0; 89.0; 90.0
SECONDARY
Median Platelet Count at the Indicated Time Points During the DB Phase
140.0; 136.0; 120.0; 116.0; 89.5; 124.0
SECONDARY
Number of Participants in the Indicated Categories for Minimum Platelet Count With Antiviral Therapy
34; 20; 159; 76; 49; 263
SECONDARY
Number of Participants With Rapid Virological Response (RVR) and Extended RVR (eRVR) During the DB Phase
34; 78; 27; 69
SECONDARY
Number of Participants With Early Virological Response (EVR) and Complete EVR (cEVR) During the DB Phase
103; 313; 57; 174
SECONDARY
Number of Participants With End of Treatment Response (ETR) and Sustained Virological Response at Week 12 of Follow-up (SVR12) During the DB Phase
59; 190; 29; 106
SECONDARY
Number of Participants in the Indicated Categories for Antiviral Therapy Dose Reductions in the DB Phase
68; 231; 76; 101; 40; 75
SECONDARY
Time to First Dose Reduction of Peginterferon Alfa-2a and Ribavirin Therapy in the DB Phase
6.58; 10.64; 12.43; 10.99
SECONDARY
Number of Participants With the Indicated Levels of Peginterferon Dose Reductions in the DB Phase
44; 89; 33; 35; 115; 112
SECONDARY
Number of Participants Who Prematurely Discontinued Antiviral Therapy in the DB Phase
164; 242
SECONDARY
Number of Participants Categorized as Responders (R) and Non-responders (NR) for SVR and RVR to Antiviral Therapy in the Indicated Variants of Interleukin 28B (IL28B) (or Interferon, Lambda 3)
10; 28; 24; 58; 2; 18
SECONDARY
Number of Participants With the Indicated Shift From Baseline (BL) in Severity Grades for Clinical Chemistry Parameters (Calcium, Glucose [Glu.], Potassium [Pot.], and Sodium [Sod.]), Per Division of Acquired Immunodeficiency Syndrome (DAIDS)
184; 374; 140; 246; 42; 122
SECONDARY
Number of Participants With the Indicated Shifts From BL in Severity Grades for for Hematology Parameters (Hemoglobin, Lymphocytes [Lym.], Total Neutrophils [Tot Neu.], and White Blood Cells [WBC]), Per DAIDS
161; 361; 46; 112; 64; 129
SECONDARY
Number of Participants in the Indicated Categories for Cataract Event During the DB Phase, Per Clinical Events Committee (CEC) Adjudication
0; 1; 4; 6; 3; 1
SECONDARY
Number of Participants Assessed as Normal and Abnormal (Clinically Significant [CS] and Not Clinically Significant [NCS]) for 12-lead Electrocardiogram (ECG) at the Indicated Time Points During the DB Phase
147; 332; 63; 103; 22; 43
SECONDARY
Number of Participants With CS and NCS Change From Baseline for 12-lead ECG at the Indicated Time Points During the DB Phase
0; 7; 218; 420; 0; 1
SECONDARY
Mean Change From Baseline in Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) at the Indicated Time Points During the DB Phase
-3.00; -2.36; -3.25; -3.74; -3.75; -3.91
SECONDARY
Mean Change From Baseline in Heart Rate at the Indicated Time Points During the DB Phase
1.16; -0.43; 1.89; 0.78; 2.47; 1.50
SECONDARY
Mean Change From Baseline in Weight at the Indicated Time Points During the DB Phase
-0.65; -0.68; -0.88; -1.06; -1.30; -1.30
SECONDARY
Mean Change From Baseline in Body Mass Index (BMI) at the Indicated Time Points During the DB Phase
-0.23; -0.23; -0.31; -0.36; -0.46; -0.45

Summary

The purpose of this study is to assess the ability of eltrombopag to maintain a platelet count sufficient to facilitate initiation of antiviral therapy, to minimise antiviral therapy dose reductions and to avoid permanent discontinuation of antiviral therapy. The clinical benefit of eltrombopag will be measured by the proportion of subjects who are able to achieve a Sustained Virological Response (SVR).

Eligibility Criteria

Inclusion Criteria

Male and female subjects, >18 years Evidence of chronic hepatitis C virus (HCV) infection Subjects who are appropriate candidates for peginterferon (pegIFN) and ribavirin antiviral therapy A platelet count of 11.0g/dL for men or >10.0g/dL for women Absolute neutrophil count (ANC) >750/mm3 and no history of infections associated with neutropenia Creatinine clearance >50mL/minute All fertile males and females must use two forms of effective contraception between them during treatment and during the 24 weeks after treatment end Subject is able to understand, consent and comply with protocol requirements and instructions and is likely to complete the study as planned

Exclusion criteria

Non-responders to previous treatment with pegIFN and ribavirin who failed to achieve a sustained virologic response (SVR) for reasons other than thrombocytopenia, despite an optimal course (dose and duration) of combination therapy with pegIFN and ribavirin Decompensated liver disease, e.g. Child-Pugh score >6 or history of ascites or hepatic encephalopathy or current evidence of ascites Known hypersensitivity, intolerance or allergy to interferon (IFN), ribavirin, eltrombopag or any of their ingredients Serious cardiac, cerebrovascular, or pulmonary disease that would preclude treatment with pegIFN and ribavirin

Subjects with a history of any one of the following:

Suicide attempt or hospitalisation for depression in the past 5 years Any current severe or poorly controlled psychiatric disorder

The following subjects are eligible for study participation, but must be assessed and followed (if recommended) by a mental health professional:

  • Subjects who have had a severe or poorly controlled psychiatric disorder more than 6 months ago but less than 5 years ago
  • Seizure disorder that has not been well controlled History of clinically significant bleeding from oesophageal or gastric varices Subjects with haemoglobinopathies, e.g. sickle cell anaemia, thalassemia major Any prior history of arterial or venous thrombosis AND two or more of the following risk factors: hereditary thrombophilic disorders (e.g. Factor V Leiden, ATIII deficiency, etc), hormone replacement therapy, systemic contraception (containing estrogen), smoking, diabetes, hypercholesterolemia, medication for hypertension or cancer Pre-existing cardiac disease (New York Heart Association (NYHA) Grade III/IV), or arrhythmias known to involve the risk of thromboembolic events, or corrected QT interval (QTc) >450 msec Evidence of hepatocellular carcinoma Laboratory evidence of infection with human immunodeficiency virus (HIV) or active Hepatitis B Virus (HBV) infection Any disease condition associated with active bleeding or requiring anticoagulation with heparin or warfarin Therapy with any anti-neoplastic or immuno-modulatory treatment <6 months prior to the first dose of eltrombopag.

Subjects who have had a malignancy diagnosed and/or treated within the past 5 years, except for subjects with localised basal or squamous cell carcinoma treated by local excision or subjects with malignancies who have been adequately treated and, in the opinion of the oncologist, have an excellent chance of cancer-free survival Pregnant or nursing women Males with a female partner who is pregnant History of alcohol/drug abuse or dependence within 6 months of the study start (unless participating in a controlled rehabilitation programme) Treatment with an investigational drug or IFN within 30 days or 5 half-lives (whichever is longer) of the screening visit History of platelet clumping that prevents reliable measurement of platelet counts History of major organ transplantation with an existing functional graft Thyroid dysfunction not adequately controlled Subjects planning to have cataract surgery Evidence of portal vein thrombosis on abdominal imaging within 3 months of the baseline visit

View full record on ClinicalTrials.gov →

Data sourced from ClinicalTrials.gov (NCT00529568). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.

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