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A Study of Entecavir in Pediatric Patients With Chronic Hepatitis B Virus (HBV)-Infection

This study is ongoing, but not recruiting participants.
Sponsor:
Information provided by (Responsible Party):
Bristol-Myers Squibb
ClinicalTrials.gov Identifier:
NCT00423891
First received: January 16, 2007
Last updated: August 19, 2014
Last verified: August 2014
  Purpose

The purpose of this clinical study is to determine the appropriate doses of entecavir to use in children and adolescents. Safety, tolerability and efficacy will also be studied


Condition Intervention Phase
Hepatitis B, Chronic
Drug: Entecavir
Phase 1
Phase 2

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Pharmacokinetics Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Evaluation of the Pharmacokinetics, Safety, Tolerability and Efficacy of Entecavir (ETV) in Pediatric Subjects With Chronic Hepatitis B Virus (HBV) Infection Who Are HBeAg-Positive

Resource links provided by NLM:


Further study details as provided by Bristol-Myers Squibb:

Primary Outcome Measures:
  • Mean Maximum Observed Plasma Concentration (Cmax) and Mean Trough Observed Plasma Concentration (Cmin) of Entecavir in LVD-naive and LVD-experienced Participants, by Age Cohort [ Time Frame: Day 14 ] [ Designated as safety issue: No ]
    Cmax and Cmin were derived from plasma concentration of ETV versus time and measured in nanograms per milliliters (ng/mL). Blood samples were obtained before study drug administration and at 0.5, 1, 2, 4, 8, and 24 hours after study drug administration on Day 14 (+/- 4 days) for the PK assessment. Plasma samples were analyzed for ETV with a validated method using liquid chromatography-tandem mass spectrometry detection. Note: PK parameters were summarized for only Groups A and B. PK assessment was optional for Group C participants (NA-experienced participants who were included with the September 2011 country-specific protocol amendment). No Group C participants chose to participate in the PK assessment.

  • Median Time of Maximum Observed Plasma Concentration (Tmax) in LVD-naive and LVD-experienced Participants, by Age Cohort [ Time Frame: Day 14 ] [ Designated as safety issue: No ]
    Tmax was derived from plasma concentration of ETV versus time and measured in hours (h). Blood samples were obtained before study drug administration and at 0.5, 1, 2, 4, 8, and 24 hours after study drug administration on Day 14 (+/- 4 days) for the PK assessment. Plasma samples were analyzed for ETV with a validated method using liquid chromatography-tandem mass spectrometry detection. Age categories presented below: participants age as of first day of dosing. PK assessment was optional for Group C participants (NA-experienced participants who were included with the September 2011 country-specific protocol amendment). No Group C participants chose to participate in the PK assessment.

  • Mean Area Under the Concentration-Time Curve in One Dosing Interval [AUC(TAU)] of Entecavir in LVD-naive and LVD-experienced Participants, by Age Cohort [ Time Frame: Day 14 ] [ Designated as safety issue: No ]
    Area under the Curve (AUC) was derived from plasma concentration of ETV versus time. AUC(TAU) was calculated by log- and linear trapezoidal summations, TAU = 24 hours, and was measured in nanograms*hours per milliliter (ng*h/mL). Blood samples were obtained before study drug administration and at 0.5, 1, 2, 4, 8, and 24 hours after study drug administration on Day 14 (+/- 4 days) for the PK assessment. Plasma samples were analyzed for ETV with a validated method using liquid chromatography-tandem mass spectrometry detection. PK assessment was optional for Group C participants (NA-experienced participants who were included with the September 2011 country-specific protocol amendment). No Group C participants chose to participate in the PK assessment.

  • Mean Apparent Total Body Clearance (CLT/F) of Entecavir in LVD-naive and LVD-experienced Participants, by Age Cohort [ Time Frame: At 2 weeks ] [ Designated as safety issue: No ]
    CLT/F was calculated by dividing the dose of ETV by AUC(TAU) of ETV and was measured in liters per hour (L/h). Blood samples were obtained before study drug administration and at 0.5, 1, 2, 4, 8, and 24 hours after study drug administration on Day 14 (+/- 4 days) for the PK assessment. Plasma samples were analyzed for ETV with a validated method using liquid chromatography-tandem mass spectrometry detection. PK assessment was optional for Group C participants (NA-experienced participants who were included with the September 2011 country-specific protocol amendment). No Group C participants chose to participate in the PK assessment.

  • Number of Participants With Serious Adverse Events (SAE) and Discontinuations Due to Adverse Events (AEs) - On Treatment [ Time Frame: Day 1 to Week 120 ] [ Designated as safety issue: Yes ]
    AE=any new unfavorable symptom, sign, or disease or worsening of a preexisting condition that may not have a causal relationship with treatment. SAE=a medical event that at any dose results in death, persistent or significant disability/incapacity, or drug dependency/abuse; is life-threatening, an important medical event, or a congenital anomaly/birth defect; or requires or prolongs hospitalization. Medical Dictionary for Regulatory Activities (MedDRA) version 16.0 was used.


Secondary Outcome Measures:
  • Number of Participants With HBV DNA Less Than 50 IU/mL Through Week 48 (Non-Completer=Failure) in Treated Participants [ Time Frame: Baseline to Week 48 ] [ Designated as safety issue: Yes ]
    Hepatitis B virus DNA by polymerase chain reaction (PCR) was measured using the Roche COBAS TaqMan - high pure system (HPS) assay and was reported in international units per milliliter (IU/mL). Baseline was the last value measured prior to or on the date of the first dose of study therapy.

  • Number of Participants With Hepatitis B e Antigen (HBeAg) Loss Through Week 48 (Non-Completer=Failure) in Treated Participants [ Time Frame: Baseline to Week 48 ] [ Designated as safety issue: No ]
    HBeAg loss: HBeAg negative. The method used for the detection of HBe Ag was the DiaSorin - Anti HBe enzyme immunoassay kit. Baseline was the last value measured prior to or on the date of the first dose of study therapy.

  • Number of Participants With Hepatitis B s Antigen (HBsAg) Loss Through Week 48 (Non-Completer=Failure) in Treated Participants [ Time Frame: Baseline to Week 48 ] [ Designated as safety issue: No ]
    HBsAg loss: HBsAg negative. The method used for detection of HBsAg was the ADVIA Centaur iImmunoassay system. Baseline was the last value measured prior to or on the date of the first dose of study therapy.

  • Number of Participants With Hepatitis B e Antigen Seroconversion Through Week 48 (Non-Completer=Failure) in Treated Participants [ Time Frame: Baseline through Week 48 ] [ Designated as safety issue: No ]
    HBe seroconversion: loss of HBeAg (HBeAg negative) with positive HB e antibodies (HBeAb), ie both the presence of HBeAb and the absence of HBeAg. The method used for the detection HBeAg seroconversion was the DiaSorin - Anti HBe enzyme immunoassay kit. Baseline was the last value measured prior to or on the date of the first dose of study therapy.

  • Number of Participants With HBV DNA Less Than Lower Limit of Detection (LLD) for the Roche COBAS TaqMan - HPS Assay (Non-Completer=Failure) at Week 48 in Treated Participants [ Time Frame: Baseline to Week 48 ] [ Designated as safety issue: No ]
    Hepatitis B virus DNA by PCR was measured using the Roche COBAS TaqMan - HPS assay and was reported in IU/mL. LLD = 6 IU/mL). Baseline was the last value measured prior to or on the date of the first dose of study therapy.

  • Number of Participants With HBV DNA Less Than Lower Limit of Quantification (LLQ) for the Roche COBAS TaqMan - HPS Assay (Non-Completer=Failure) Through Week 48 in Treated Participants [ Time Frame: Baseline through Week 48 ] [ Designated as safety issue: No ]
    Hepatitis B virus DNA by PCR was measured using the Roche COBAS TaqMan - HPS assay and was reported in IU/mL. LLQ = 29 IU/mL. Baseline was the last value measured prior to or on the date of the first dose of study therapy.

  • Number of Participants With HB s Antigen (HBsAg) Seroconversion Through Week 48 (Non-Completer=Failure) in Treated Participants [ Time Frame: Baseline through Week 48 ] [ Designated as safety issue: No ]
    HB s Ag seroconversion: loss of HBsAg (HBsAg negative) and presence of HB s antibodies (HBsAb). The method used for the detection of HBsAg seroconversion was the ADVIA Centaur iImmunoassay system. Baseline was the last value measured prior to or on the date of the first dose of study therapy.

  • Number of Participants Who Had a Protocol Defined Response (PDR) Through Week 48 (Non-Completer=Failure) in Treated Participants [ Time Frame: Baseline to Week 48 ] [ Designated as safety issue: No ]
    PDR was defined as confirmed HBV DNA < 50 IU/mL plus confirmed HBeAg seroconversion on 2 sequential measurements at least 14 days apart. Baseline was the last value measured prior to or on the date of the first dose of study therapy.

  • Mean Log10 Change From Baseline in HBV DNA Using Roche COBAS TaqMan - HPS Through Week 48 in Treated Participants [ Time Frame: Baseline to Week 48 ] [ Designated as safety issue: No ]
    Hepatitis B virus DNA by PCR was measured using the Roche COBAS TaqMan - HPS assay and was reported in IU/mL. HBV DNA log10 changes from baseline were summarized over time.

  • Alanine Aminotransferase (ALT) Normalization From Baseline Through Week 48 (Non-Completer=Failure) in Treated Participants [ Time Frame: Baseline to Week 48 ] [ Designated as safety issue: No ]
    Normalization in ALT= ALT ≤ 1.0*upper limit of normal (ULN). Baseline was the last value measured prior to or on the date of the first dose of study therapy.

  • Number of Participants With HBV DNA by PCR Categories (Non-Completer=Failure) at Week 48 in Treated Participants [ Time Frame: Baseline, Week 48 ] [ Designated as safety issue: No ]
    Hepatitis B virus DNA by PCR was measured using the Roche COBAS TaqMan - HPS assay and was reported in IU/mL. LLQ = 29 IU/mL. Baseline was the last value measured prior to or on the date of the first dose of study therapy.

  • Number of Participants With a Combination of ALT Normalization and HBV DNA Less Than 50 IU/mL Through Week 48 (Non-Completer=Failure) in Treated Participants [ Time Frame: Baseline to Week 48 ] [ Designated as safety issue: No ]
    Hepatitis B virus DNA by PCR was measured using the Roche COBAS TaqMan - HPS assay and was reported in IU/mL. Baseline was the last value measured prior to or on the date of the first dose of study therapy. Normalization in ALT= ALT ≤ 1.0*ULN.

  • Number of Participants With a Combination of ALT Normalization and HBV DNA Less Than 50 IU/mL, Plus HBeAg Seroconversion Through Week 48 (Non-Completer=Failure) in Treated Participants [ Time Frame: Baseline to Week 48 ] [ Designated as safety issue: No ]
    Hepatitis B virus DNA by PCR was measured using the Roche COBAS TaqMan - HPS assay and was reported in IU/mL. Baseline was the last value measured prior to or on the date of the first dose of study therapy. Normalization in ALT= ALT ≤ 1.0*ULN. HBe seroconversion was determination of presence of HBeAb and loss of HBeAg. The method used for the detection of HBeAg seroconversion was the DiaSorin - Anti HBe enzyme immunoassay kit.

  • Number of Participants With a Combination of ALT Normalization and HBV DNA Less Than 50 IU/mL, Without HBeAg Seroconversion, Through Week 48 (Non-Completer=Failure) in Treated Participants [ Time Frame: Baseline to Week 48 ] [ Designated as safety issue: No ]
    Hepatitis B virus DNA by PCR was measured using the Roche COBAS TaqMan - HPS assay and was reported in IU/mL. Baseline was the last value measured prior to or on the date of the first dose of study therapy. Normalization in ALT= ALT ≤ 1.0*ULN. HBe seroconversion: loss of HBeAg (HBeAg negative) with positive HBeAb. The method used for the detection of HBeAg/Ab serologies was the DiaSorin enzyme immunoassay kit.

  • Number of Participants With Hematology Laboratory Abnormalities (Grades 1 - 4) - On Treatment - Treated Participants [ Time Frame: Day 1 to Week 120 ] [ Designated as safety issue: Yes ]
    Toxicity Scale: Division of AIDs (DAIDS) grades Version 1.0. Upper limit of normal (ULN); lower limit of normal (LLN); Cells per Liter (c/L); cells per microliter (c/µL); grams per deciliter (g/dL); milliequivalents per liter (mEq/L); cells per microliter (c/µL): Grade (Gr). Hemoglobin g/dL: Gr1:10.0-10.9;Gr2: 9.0-9.9; Gr3:7.0-8.9; Gr4: <7.0. International normalization ratio (INR): Gr1:1.1-<1.5*ULN; Gr2: 1.6-<2.0*ULN; Gr3: 2.1-3.0*ULN;Gr4: >3.0*ULN. Neutrophils/bands c/µL: Gr1;1.0-1.3*10^3; Gr2: 0.75-0.99*10^3; Gr 3: 0.50-0.749*10^3; Gr4: <0.5*10^3.

  • Number of Participants With Chemistry Laboratory Abnormalities (Grades 1 - 4) - On Treatment - Treated Participants [ Time Frame: Day 1 to Week 120 ] [ Designated as safety issue: Yes ]
    Toxicity Scale: DAIDS Version 1.0 and modified World Health Organization (WHO). Grade (Gr). ALT: Gr1:1.25-<2.5*ULN; Gr2: 2.6-<5.0 *ULN; Gr3: 5.1-10.0*ULN; Gr4:>10.0*ULN. Aspartate aminotransferase (AST): Gr1: 1.25-<2.5*ULN; Gr2:2.6-<5.0*ULN; Gr 3: 5.1-10.0*ULN; Gr4>10.0*ULN. Alkaline phosphatase: Gr1:1.25-<2.5*ULN; Gr2: 2.6-<5.0*ULN; Gr3: 5.1-10.0*ULN; Gr4: >10.0*ULN. Lipase: Gr1:1.1-<1.5*ULN;Gr2:1.6-<3.0*ULN; Gr3: 3.1-5.0*ULN; Gr4: >5.0*ULN. Creatinine: Gr1: 1.1-1.3*ULN; Gr2: 1.4-<1.8*ULN; Gr3: 1.9 - <3.4*ULN; Gr4: >=3.5*ULN. Glucose mg/dL (high): Gr1:110-<125 (Fasting)/116-<160;Gr2:126-<250 (F)/161-<250; Gr3: 251-500; Gr4: >500.Glucose (low): Gr1: 55-64; Gr2: 40 - <54; Gr3: 30-39; Gr4: <30 mg/dL.

  • Number of Participants With Electrolyte Laboratory Abnormalities (Grades 1 - 4) - On Treatment - Treated Participants [ Time Frame: Day 1 Week 120 ] [ Designated as safety issue: Yes ]
    Toxicity Scale: DAIDS Version 1.0 and modified World Health Organization (WHO) for chloride. Milliequivalents per liter (mEq/L); Grade (Gr). Chloride high (mEq/L): Gr1: 113-<117; Gr2: 117-<121; Gr3: 121-125; Gr4: >125. Potassium low (mEq/L): Gr1: 3.0-3.4; Gr2: 2.5-2.9; Gr3:2.0-<2.4; Gr4: <2.0. Potassium high: Gr1; 5.6- <6.0; Gr2: 6.1-<6.5; Gr3: 6.6-7.0; Gr4: >7.0. Sodium high (mEq/L): Gr1; 146-<150; Gr2: 151-<154; Gr3: 155-<159; Gr4: >=160.


Enrollment: 64
Study Start Date: June 2007
Estimated Study Completion Date: October 2017
Primary Completion Date: August 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Arm 1: Entecavir Drug: Entecavir
Tablets / Oral Solution, Oral, Naïve: 0.015 mg/kg up to 0.5 mg; Experienced: 0.030 mg/kg up to 1 mg, once daily, 48 - 120 weeks depending on response
Other Names:
  • Baraclude
  • BMS-200475

  Eligibility

Ages Eligible for Study:   2 Years to 18 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • 2-18 years of age
  • Group A: Lamivudine naive (<1 week of Lamivudine) and not within 24 weeks of screening; Group B: Lamivudine experienced (> 12 weeks of Lamivudine); Group C: nucleoside/nucleotide experienced (> 12 weeks of nucleoside/tide therapy) added as a country-specific protocol amendment (not all sites had Group C).
  • HBV Deoxyribonucleic acid (DNA) ≥ 100000 copies/mL; ≥ 10000 copies for nucleoside/nucleotide experienced (Group C)
  • Detectable Hepatitis B surface antigen (HBsAg) for 24 weeks prior to screening
  • Hepatitis B e antigen (HBeAg) positive
  • Compensated liver and renal function
  • Elevated alanine aminotransferase (ALT) at screening and during the 24 weeks prior to screening (for Groups A and B)

Exclusion Criteria:

  • Coinfection with Human immunodeficiency virus (HIV), Hepatitis C virus (HCV), Hepatitis D Virus (HDV)
  • Children who were breastfed while their mother received Lamivudine, or children whose mothers received Lamivudine during pregnancy
  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 ClinicalTrials.gov identifier: NCT00423891

  Show 19 Study Locations
Sponsors and Collaborators
Bristol-Myers Squibb
Investigators
Study Director: Bristol-Myers Squibb Bristol-Myers Squibb
  More Information

Additional Information:
No publications provided

Responsible Party: Bristol-Myers Squibb
ClinicalTrials.gov Identifier: NCT00423891     History of Changes
Other Study ID Numbers: AI463-028
Study First Received: January 16, 2007
Results First Received: July 15, 2014
Last Updated: August 19, 2014
Health Authority: United States: Food and Drug Administration

Additional relevant MeSH terms:
Hepatitis
Hepatitis A
Hepatitis B
Hepatitis B, Chronic
Hepatitis, Chronic
DNA Virus Infections
Digestive System Diseases
Enterovirus Infections
Hepadnaviridae Infections
Hepatitis, Viral, Human
Liver Diseases
Picornaviridae Infections
RNA Virus Infections
Virus Diseases
Entecavir
Anti-Infective Agents
Antiviral Agents
Pharmacologic Actions
Therapeutic Uses

ClinicalTrials.gov processed this record on November 20, 2014