Study to Evaluate the Safety, Tolerability, and Efficacy of Vesatolimod in Combination With Tenofovir Disoproxil Fumarate (TDF) in Adults With Chronic Hepatitis B (CHB) Infection Who Are Currently Not Being Treated

Sponsor
Gilead Sciences (Industry)
Overall Status
Completed
CT.gov ID
NCT02579382
Collaborator
(none)
192
21
4
41.7
9.1
0.2

Study Details

Study Description

Brief Summary

The primary objectives of this study are to evaluate the safety, tolerability, and efficacy of vesatolimod (formerly GS-9620) in adults with chronic hepatitis B (CHB) infection who are currently not being treated.

Condition or Disease Intervention/Treatment Phase
Phase 2

Study Design

Study Type:
Interventional
Actual Enrollment :
192 participants
Allocation:
Randomized
Intervention Model:
Parallel Assignment
Masking:
Double (Participant, Investigator)
Primary Purpose:
Treatment
Official Title:
A Phase 2, Randomized, Double-Blind, Placebo-Controlled, Multi-center Study to Evaluate the Safety and Efficacy of GS-9620 in Combination With Tenofovir Disoproxil Fumarate (TDF) for the Treatment of Subjects With Chronic Hepatitis B and Who Are Currently Not on Treatment
Actual Study Start Date :
Nov 10, 2015
Actual Primary Completion Date :
Jan 16, 2017
Actual Study Completion Date :
May 3, 2019

Arms and Interventions

Arm Intervention/Treatment
Placebo Comparator: TDF + placebo

Main Study Phase: Tenofovir disoproxil fumarate (TDF) 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144.

Drug: TDF
300 mg tablets administered orally once daily
Other Names:
  • Viread®
  • Drug: Placebo
    Placebo administered orally once a week (every 7 days) for 12 doses

    Experimental: TDF + Vesatolimod 1 mg

    Main Study Phase:TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144.

    Drug: TDF
    300 mg tablets administered orally once daily
    Other Names:
  • Viread®
  • Drug: Vesatolimod
    Tablets administered orally once a week (every 7 days) for 12 doses
    Other Names:
  • GS-9620
  • Experimental: TDF + Vesatolimod 2 mg

    Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144.

    Drug: TDF
    300 mg tablets administered orally once daily
    Other Names:
  • Viread®
  • Drug: Vesatolimod
    Tablets administered orally once a week (every 7 days) for 12 doses
    Other Names:
  • GS-9620
  • Experimental: TDF + Vesatolimod 4 mg

    Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144.

    Drug: TDF
    300 mg tablets administered orally once daily
    Other Names:
  • Viread®
  • Drug: Vesatolimod
    Tablets administered orally once a week (every 7 days) for 12 doses
    Other Names:
  • GS-9620
  • Outcome Measures

    Primary Outcome Measures

    1. Mean Change (Measured in log10 IU/mL) in Hepatitis B Surface Antigen (HBsAg) From Baseline at Week 24 [Baseline; Week 24]

      The change from baseline to Week 24 in HBsAg (log10 IU/mL) was analyzed using a mixed model for repeated measures (MMRM). The model included treatment, baseline HBsAg (log10 IU/mL), baseline Hepatitis B Envelope Antigen (HBeAg) status (positive or negative), baseline alanine aminotransferase (ALT) level relative to upper limit of normal (ULN) (> 19 vs ≤ 19 IU/L for females; > 30 vs ≤ 30 IU/L for males), visit and treatment-by-visit interaction as fixed effects, and visit as a repeated measure.

    Secondary Outcome Measures

    1. Percentage of Participants With HBeAg Loss and Seroconversion at Week 24 [Week 24]

      HBeAg loss was defined as qualitative HBeAg result changing from positive at baseline to negative at any postbaseline visit. HBeAg seroconversion was defined as qualitative Hepatitis B Envelope Antibody (HBeAb) result changing from negative at baseline to positive at any postbaseline visit. The Missing (M) = Failure (F) approach was used for this analysis.

    2. Percentage of Participants With HBeAg Loss and Seroconversion at Week 48 [Week 48]

      HBeAg loss was defined as qualitative HBeAg result changing from positive at baseline to negative at any postbaseline visit. HBeAg seroconversion was defined as qualitative HBeAb result changing from negative at baseline to positive at any postbaseline visit. The Missing (M) = Failure (F) approach was used for this analysis.

    3. Percentage of Participants With HBsAg Loss and Seroconversion at Week 24 [Week 24]

      HBsAg loss was defined as qualitative HBsAg result changing from positive at baseline to negative at any postbaseline visit. HBsAg seroconversion was defined as qualitative Hepatitis B Surface Antibody (HBsAb) result changing from negative at baseline to positive at any postbaseline visit. The Missing (M) = Failure (F) approach was used for this analysis.

    4. Percentage of Participants With HBsAg Loss and Seroconversion at Week 48 [Week 48]

      HBsAg loss was defined as qualitative HBsAg result changing from positive at baseline to negative at any postbaseline visit. HBsAg seroconversion was defined as qualitative HBsAb result changing from negative at baseline to positive at any postbaseline visit. The Missing (M) = Failure (F) approach was used for this analysis.

    5. Mean Change (Measured in log10 IU/mL) in HBsAg From Baseline at Week 12 [Baseline; Week 12]

    6. Mean Change (Measured in log10 IU/mL) in HBsAg From Baseline at Week 48 [Baseline; Week 48]

    7. Percentage of Participants With a ≥ 0.5 log10 IU/mL Decline in Serum HBsAg Titers From Baseline at Week 12 [Baseline to Week 12]

      HBsAg ≥ 0.5 log10 IU/mL decline was defined as a decline from baseline in log10 IU/mL serum HBsAg ≥ 0.5 at the Week 12 post-baseline visit. Missing values were considered failures.

    8. Percentage of Participants With a ≥ 0.5 log10 IU/mL Decline in Serum HBsAg Titers From Baseline at Week 24 [Baseline to Week 24]

      HBsAg ≥ 0.5 log10 IU/mL decline was defined as a decline from baseline in log10 IU/mL serum HBsAg ≥ 0.5 at the Week 24 post-baseline visit.

    9. Percentage of Participants With a ≥ 0.5 log10 IU/mL Decline in Serum HBsAg Titers From Baseline at Week 48 [Baseline to Week 48]

      HBsAg ≥ 0.5 log10 IU/mL decline was defined as a decline from baseline in log10 IU/mL serum HBsAg ≥ 0.5 at the Week 12 post-baseline visit. Missing values were considered failures.

    10. Percentage of Participants With Hepatitis B Virus Deoxyribonucleic Acid (HBV DNA) < Lower Limit of Quantitation (LLOQ) at Week 24 [Week 24]

      LLOQ for HBV DNA was defined as 20 IU/mL. The participants with missing information were excluded from the analysis.

    11. Percentage of Participants With HBV DNA < LLOQ at Week 48 [Week 48]

      LLOQ for HBV DNA was defined as 20 IU/mL. The participants with missing information were excluded from the analysis.

    12. Percentage of Participants Experiencing Virologic Breakthrough [Weeks 24 and 48]

      Virologic breakthrough was defined as confirmed HBV DNA ≥ 69 IU/mL after having had HBV DNA < 69 IU/mL or confirmed 1.0 log10 IU/mL or greater increase in HBV DNA from nadir. Confirmation requires 2 consecutive occurrences of elevation in HBV DNA to > 69 IU/mL after having had HBV DNA < 69 IU/mL or 1.0 log10 IU/mL or greater increases in HBV DNA from nadir.

    13. Number of Participants With Sequence Changes From Baseline Within the HBV Polymerase/Reverse Transcriptase (Pol/RT) [Baseline; Week 48]

      Sequence analysis of the HBV pol/RT was attempted for any participant who had HBV DNA ≥ 69 IU/mL at Week 48 or early discontinuation. Results of the alignment of Week 48 and baseline sequence were reported as a change from baseline sequence.

    14. Pharmacokinetic (PK) Parameter: AUClast of Vesatolimod [Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose]

      AUClast is defined as the area under the concentration versus time curve from time zero to the last quantifiable concentration.

    15. PK Parameter: AUCinf of Vesatolimod [Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose]

      AUCinf is defined as the concentration of drug extrapolated to infinite time.

    16. PK Parameter: %AUCexp of Vesatolimod [Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose]

      %AUCexp is defined as the percentage of AUC extrapolated between AUClast and AUCinf.

    17. PK Parameter: Cmax of Vesatolimod [Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose]

      Cmax is defined as the maximum concentration of drug.

    18. PK Parameter: Clast of Vesatolimod [Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose]

      Clast is defined as the last observable concentration of drug.

    19. PK Parameter: Tmax of Vesatolimod [Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose]

      Tmax is defined as the time (observed time point) of Cmax

    20. PK Parameter: Tlast of Vesatolimod [Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose]

      Tlast is defined as the time (observed time point) of Clast.

    21. PK Parameter: T1/2 of Vesatolimod [Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose]

      T1/2 is defined as the estimate of the terminal elimination half-life of the drug.

    22. PK Parameter: CL/F of Vesatolimod [Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose]

      CL/F is defined as the apparent oral clearance following administration of the drug.

    Eligibility Criteria

    Criteria

    Ages Eligible for Study:
    18 Years to 65 Years
    Sexes Eligible for Study:
    All
    Accepts Healthy Volunteers:
    No
    Key Inclusion Criteria:
    • Adult males or females between the ages of 18-65

    • Chronic hepatitis B virus (HBV) infection

    • HBV deoxyribonucleic acid (DNA ) ≥ 2000 IU/mL at screening

    Key Exclusion Criteria:
    • Extensive bridging fibrosis or cirrhosis

    • Received oral antiviral treatment for HBV or prolonged therapy with immune-modulators or biologics within 3 months of screening

    • Co-infection with hepatitis C virus (HCV), human immunodeficiency virus (HIV) or hepatitis D virus (HDV)

    • Chronic liver disease other than HBV

    • Lactating or pregnant females or those that wish to become pregnant during the course of the study

    Note: Other protocol defined Inclusion/Exclusion criteria may apply.

    Contacts and Locations

    Locations

    Site City State Country Postal Code
    1 Los Angeles California United States
    2 Palo Alto California United States
    3 San Diego California United States
    4 San Francisco California United States
    5 Honolulu Hawaii United States
    6 Catonsville Maryland United States
    7 Boston Massachusetts United States
    8 Flushing New York United States
    9 Philadelphia Pennsylvania United States
    10 Toronto Ontario Canada
    11 Kowloon Hong Kong
    12 Bologna Italy
    13 Milano Italy
    14 Pisa Italy
    15 San Giovanni Rotondo Italy
    16 Daegu Korea, Republic of
    17 Seoul Korea, Republic of
    18 Grafton Auckland New Zealand
    19 Dalin Taiwan
    20 Kaohsiung Taiwan
    21 London United Kingdom

    Sponsors and Collaborators

    • Gilead Sciences

    Investigators

    • Study Director: Gilead Study Director, Gilead Sciences

    Study Documents (Full-Text)

    None provided.

    More Information

    Publications

    None provided.
    Responsible Party:
    Gilead Sciences
    ClinicalTrials.gov Identifier:
    NCT02579382
    Other Study ID Numbers:
    • GS-US-283-1062
    • 2015-002017-30
    First Posted:
    Oct 19, 2015
    Last Update Posted:
    May 18, 2020
    Last Verified:
    May 1, 2020
    Individual Participant Data (IPD) Sharing Statement:
    No
    Plan to Share IPD:
    No
    Studies a U.S. FDA-regulated Drug Product:
    Yes
    Studies a U.S. FDA-regulated Device Product:
    No
    Keywords provided by Gilead Sciences
    Additional relevant MeSH terms:

    Study Results

    Participant Flow

    Recruitment Details Participants were enrolled at study sites in Asia, Europe, New Zealand, and North America. The first participant was screened on 10 November 2015. The last study visit occurred on 03 May 2019.
    Pre-assignment Detail 260 participants were screened
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: Tenofovir disoproxil fumarate (TDF) 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144.
    Period Title: Main Study Phase
    STARTED 28 53 56 55
    COMPLETED 28 53 54 52
    NOT COMPLETED 0 0 2 3
    Period Title: Main Study Phase
    STARTED 27 51 54 49
    COMPLETED 26 44 50 44
    NOT COMPLETED 1 7 4 5

    Baseline Characteristics

    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg Total
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144. Total of all reporting groups
    Overall Participants 28 53 56 55 192
    Age (years) [Mean (Standard Deviation) ]
    Mean (Standard Deviation) [years]
    41
    (10.4)
    41
    (9.6)
    44
    (10.3)
    44
    (10.3)
    42
    (10.1)
    Sex: Female, Male (Count of Participants)
    Female
    12
    42.9%
    21
    39.6%
    16
    28.6%
    20
    36.4%
    69
    35.9%
    Male
    16
    57.1%
    32
    60.4%
    40
    71.4%
    35
    63.6%
    123
    64.1%
    Race/Ethnicity, Customized (Count of Participants)
    Asian
    22
    78.6%
    41
    77.4%
    48
    85.7%
    44
    80%
    155
    80.7%
    White
    4
    14.3%
    6
    11.3%
    5
    8.9%
    10
    18.2%
    25
    13%
    Black or African American
    1
    3.6%
    5
    9.4%
    3
    5.4%
    0
    0%
    9
    4.7%
    Native Hawaiian or Pacific Islander
    1
    3.6%
    0
    0%
    0
    0%
    1
    1.8%
    2
    1%
    Other
    0
    0%
    1
    1.9%
    0
    0%
    0
    0%
    1
    0.5%
    Race/Ethnicity, Customized (Count of Participants)
    Hispanic or Latino
    0
    0%
    0
    0%
    0
    0%
    0
    0%
    0
    0%
    Not Hispanic or Latino
    28
    100%
    53
    100%
    56
    100%
    55
    100%
    192
    100%
    Not Permitted
    0
    0%
    0
    0%
    0
    0%
    0
    0%
    0
    0%
    Region of Enrollment (participants) [Number]
    New Zealand
    1
    3.6%
    0
    0%
    1
    1.8%
    3
    5.5%
    5
    2.6%
    Canada
    2
    7.1%
    8
    15.1%
    9
    16.1%
    4
    7.3%
    23
    12%
    South Korea
    7
    25%
    12
    22.6%
    17
    30.4%
    15
    27.3%
    51
    26.6%
    Hong Kong
    0
    0%
    3
    5.7%
    0
    0%
    2
    3.6%
    5
    2.6%
    United States
    6
    21.4%
    14
    26.4%
    13
    23.2%
    10
    18.2%
    43
    22.4%
    Taiwan
    5
    17.9%
    4
    7.5%
    6
    10.7%
    6
    10.9%
    21
    10.9%
    Italy
    6
    21.4%
    8
    15.1%
    6
    10.7%
    12
    21.8%
    32
    16.7%
    United Kingdom
    1
    3.6%
    4
    7.5%
    4
    7.1%
    3
    5.5%
    12
    6.3%
    Serum Hepatitis B Surface Antigen (HBsAg) (log10 IU/mL) (log10 IU/mL) [Mean (Standard Deviation) ]
    Mean (Standard Deviation) [log10 IU/mL]
    3.8
    (0.84)
    3.7
    (0.84)
    3.5
    (0.88)
    3.6
    (0.74)
    3.6
    (0.82)
    Hepatitis B Envelope Antigen (HBeAg) Status (Count of Participants)
    HBeAg Status- Negative
    17
    60.7%
    33
    62.3%
    33
    58.9%
    34
    61.8%
    117
    60.9%
    HBeAg Status- Positive
    11
    39.3%
    20
    37.7%
    23
    41.1%
    21
    38.2%
    75
    39.1%
    Hepatitis B Virus (HBV) DNA (log10 IU/mL) [Mean (Standard Deviation) ]
    Mean (Standard Deviation) [log10 IU/mL]
    5.9
    (2.10)
    5.9
    (1.80)
    5.6
    (1.85)
    5.9
    (1.70)
    5.8
    (1.82)

    Outcome Measures

    1. Primary Outcome
    Title Mean Change (Measured in log10 IU/mL) in Hepatitis B Surface Antigen (HBsAg) From Baseline at Week 24
    Description The change from baseline to Week 24 in HBsAg (log10 IU/mL) was analyzed using a mixed model for repeated measures (MMRM). The model included treatment, baseline HBsAg (log10 IU/mL), baseline Hepatitis B Envelope Antigen (HBeAg) status (positive or negative), baseline alanine aminotransferase (ALT) level relative to upper limit of normal (ULN) (> 19 vs ≤ 19 IU/L for females; > 30 vs ≤ 30 IU/L for males), visit and treatment-by-visit interaction as fixed effects, and visit as a repeated measure.
    Time Frame Baseline; Week 24

    Outcome Measure Data

    Analysis Population Description
    The Full Analysis Set included all participants who were randomized and took at least 1 dose of study drug.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + Placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 28 53 54 54
    Least Squares Mean (95% Confidence Interval) [log10 IU/mL]
    -0.163
    -0.056
    -0.146
    -0.036
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection TDF + Placebo, TDF + Vesatolimod 1 mg
    Comments
    Type of Statistical Test Superiority
    Comments
    Statistical Test of Hypothesis p-Value 0.227
    Comments MMRM model included treatment, baseline ALT level, HBeAg baseline status, baseline HBsAg, visit and treatment-by-visit interaction as fixed effect and visit as repeated measurement.
    Method MMRM
    Comments
    Method of Estimation Estimation Parameter Least Squares Mean Difference
    Estimated Value 0.107
    Confidence Interval (2-Sided) 95%
    -0.067 to 0.282
    Parameter Dispersion Type:
    Value:
    Estimation Comments
    Statistical Analysis 2
    Statistical Analysis Overview Comparison Group Selection TDF + Placebo, TDF + Vesatolimod 2 mg
    Comments
    Type of Statistical Test Superiority
    Comments
    Statistical Test of Hypothesis p-Value 0.840
    Comments MMRM model included treatment, baseline ALT level, HBeAg baseline status, baseline HBsAg, visit and treatment-by-visit interaction as fixed effect and visit as repeated measurement.
    Method MMRM
    Comments
    Method of Estimation Estimation Parameter Least Squares Mean Difference
    Estimated Value 0.018
    Confidence Interval (2-Sided) 95%
    -0.156 to 0.191
    Parameter Dispersion Type:
    Value:
    Estimation Comments
    Statistical Analysis 3
    Statistical Analysis Overview Comparison Group Selection TDF + Placebo, TDF + Vesatolimod 4 mg
    Comments
    Type of Statistical Test Superiority
    Comments
    Statistical Test of Hypothesis p-Value 0.151
    Comments MMRM model included treatment, baseline ALT level, HBeAg baseline status, baseline HBsAg, visit and treatment-by-visit interaction as fixed effect and visit as repeated measurement.
    Method MMRM
    Comments
    Method of Estimation Estimation Parameter Least Squares Mean Difference
    Estimated Value 0.127
    Confidence Interval (2-Sided) 95%
    -0.047 to 0.301
    Parameter Dispersion Type:
    Value:
    Estimation Comments
    2. Secondary Outcome
    Title Percentage of Participants With HBeAg Loss and Seroconversion at Week 24
    Description HBeAg loss was defined as qualitative HBeAg result changing from positive at baseline to negative at any postbaseline visit. HBeAg seroconversion was defined as qualitative Hepatitis B Envelope Antibody (HBeAb) result changing from negative at baseline to positive at any postbaseline visit. The Missing (M) = Failure (F) approach was used for this analysis.
    Time Frame Week 24

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set who were HBeAg positive at baseline were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 11 20 23 21
    Number [percentage of participants]
    0
    0%
    0
    0%
    0
    0%
    0
    0%
    3. Secondary Outcome
    Title Percentage of Participants With HBeAg Loss and Seroconversion at Week 48
    Description HBeAg loss was defined as qualitative HBeAg result changing from positive at baseline to negative at any postbaseline visit. HBeAg seroconversion was defined as qualitative HBeAb result changing from negative at baseline to positive at any postbaseline visit. The Missing (M) = Failure (F) approach was used for this analysis.
    Time Frame Week 48

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set who were HBeAg positive at baseline were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 11 20 23 21
    Number [percentage of participants]
    0
    0%
    5.0
    9.4%
    4.3
    7.7%
    4.8
    8.7%
    4. Secondary Outcome
    Title Percentage of Participants With HBsAg Loss and Seroconversion at Week 24
    Description HBsAg loss was defined as qualitative HBsAg result changing from positive at baseline to negative at any postbaseline visit. HBsAg seroconversion was defined as qualitative Hepatitis B Surface Antibody (HBsAb) result changing from negative at baseline to positive at any postbaseline visit. The Missing (M) = Failure (F) approach was used for this analysis.
    Time Frame Week 24

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set who were HBsAg positive at baseline were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 28 53 56 55
    Number [percentage of participants]
    0
    0%
    0
    0%
    0
    0%
    0
    0%
    5. Secondary Outcome
    Title Percentage of Participants With HBsAg Loss and Seroconversion at Week 48
    Description HBsAg loss was defined as qualitative HBsAg result changing from positive at baseline to negative at any postbaseline visit. HBsAg seroconversion was defined as qualitative HBsAb result changing from negative at baseline to positive at any postbaseline visit. The Missing (M) = Failure (F) approach was used for this analysis.
    Time Frame Week 48

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set who were HBsAg positive at baseline were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 28 53 56 55
    Number [percentage of participants]
    0
    0%
    0
    0%
    0
    0%
    0
    0%
    6. Secondary Outcome
    Title Mean Change (Measured in log10 IU/mL) in HBsAg From Baseline at Week 12
    Description
    Time Frame Baseline; Week 12

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set with available data were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 27 53 55 52
    Mean (Standard Deviation) [log10 IU/mL]
    -0.087
    (0.2199)
    -0.041
    (0.2283)
    -0.138
    (0.5247)
    -0.020
    (0.2668)
    7. Secondary Outcome
    Title Mean Change (Measured in log10 IU/mL) in HBsAg From Baseline at Week 48
    Description
    Time Frame Baseline; Week 48

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set with available data were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 28 53 54 53
    Mean (Standard Deviation) [log10 IU/mL]
    -0.338
    (0.8922)
    -0.079
    (0.2912)
    -0.197
    (0.5757)
    -0.088
    (0.3700)
    8. Secondary Outcome
    Title Percentage of Participants With a ≥ 0.5 log10 IU/mL Decline in Serum HBsAg Titers From Baseline at Week 12
    Description HBsAg ≥ 0.5 log10 IU/mL decline was defined as a decline from baseline in log10 IU/mL serum HBsAg ≥ 0.5 at the Week 12 post-baseline visit. Missing values were considered failures.
    Time Frame Baseline to Week 12

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 28 53 56 55
    Number [percentage of participants]
    7.1
    25.4%
    3.8
    7.2%
    10.7
    19.1%
    1.8
    3.3%
    9. Secondary Outcome
    Title Percentage of Participants With a ≥ 0.5 log10 IU/mL Decline in Serum HBsAg Titers From Baseline at Week 24
    Description HBsAg ≥ 0.5 log10 IU/mL decline was defined as a decline from baseline in log10 IU/mL serum HBsAg ≥ 0.5 at the Week 24 post-baseline visit.
    Time Frame Baseline to Week 24

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 28 53 56 55
    Number [percentage of participants]
    10.7
    38.2%
    3.8
    7.2%
    10.7
    19.1%
    3.6
    6.5%
    10. Secondary Outcome
    Title Percentage of Participants With a ≥ 0.5 log10 IU/mL Decline in Serum HBsAg Titers From Baseline at Week 48
    Description HBsAg ≥ 0.5 log10 IU/mL decline was defined as a decline from baseline in log10 IU/mL serum HBsAg ≥ 0.5 at the Week 12 post-baseline visit. Missing values were considered failures.
    Time Frame Baseline to Week 48

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 28 53 56 55
    Number [percentage of participants]
    17.9
    63.9%
    5.7
    10.8%
    16.1
    28.8%
    14.5
    26.4%
    11. Secondary Outcome
    Title Percentage of Participants With Hepatitis B Virus Deoxyribonucleic Acid (HBV DNA) < Lower Limit of Quantitation (LLOQ) at Week 24
    Description LLOQ for HBV DNA was defined as 20 IU/mL. The participants with missing information were excluded from the analysis.
    Time Frame Week 24

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 28 53 56 55
    Number [percentage of participants]
    53.6
    191.4%
    58.5
    110.4%
    59.3
    105.9%
    63.0
    114.5%
    12. Secondary Outcome
    Title Percentage of Participants With HBV DNA < LLOQ at Week 48
    Description LLOQ for HBV DNA was defined as 20 IU/mL. The participants with missing information were excluded from the analysis.
    Time Frame Week 48

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 28 53 56 55
    Number [percentage of participants]
    64.3
    229.6%
    62.3
    117.5%
    75.9
    135.5%
    75.5
    137.3%
    13. Secondary Outcome
    Title Percentage of Participants Experiencing Virologic Breakthrough
    Description Virologic breakthrough was defined as confirmed HBV DNA ≥ 69 IU/mL after having had HBV DNA < 69 IU/mL or confirmed 1.0 log10 IU/mL or greater increase in HBV DNA from nadir. Confirmation requires 2 consecutive occurrences of elevation in HBV DNA to > 69 IU/mL after having had HBV DNA < 69 IU/mL or 1.0 log10 IU/mL or greater increases in HBV DNA from nadir.
    Time Frame Weeks 24 and 48

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 28 53 56 55
    Week 24
    0
    0%
    0
    0%
    1.8
    3.2%
    0
    0%
    Week 48
    0
    0%
    3.8
    7.2%
    1.8
    3.2%
    0
    0%
    14. Secondary Outcome
    Title Number of Participants With Sequence Changes From Baseline Within the HBV Polymerase/Reverse Transcriptase (Pol/RT)
    Description Sequence analysis of the HBV pol/RT was attempted for any participant who had HBV DNA ≥ 69 IU/mL at Week 48 or early discontinuation. Results of the alignment of Week 48 and baseline sequence were reported as a change from baseline sequence.
    Time Frame Baseline; Week 48

    Outcome Measure Data

    Analysis Population Description
    Participants in the Full Analysis Set with available data were analyzed.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 5 13 5 7
    Count of Participants [Participants]
    2
    7.1%
    4
    7.5%
    2
    3.6%
    2
    3.6%
    15. Secondary Outcome
    Title Pharmacokinetic (PK) Parameter: AUClast of Vesatolimod
    Description AUClast is defined as the area under the concentration versus time curve from time zero to the last quantifiable concentration.
    Time Frame Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose

    Outcome Measure Data

    Analysis Population Description
    The PK Substudy Analysis Set included all randomized participants who took at least 1 dose of vesatolimod, participated in the PK substudy, and had at least 1 non-missing steady state PK parameter.
    Arm/Group Title TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 5 5 4
    Mean (Standard Deviation) [hour*picogram/milliliter (h*pg/mL)]
    5252.3
    (5756.26)
    7170.6
    (4569.83)
    28537.2
    (23608.94)
    16. Secondary Outcome
    Title PK Parameter: AUCinf of Vesatolimod
    Description AUCinf is defined as the concentration of drug extrapolated to infinite time.
    Time Frame Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose

    Outcome Measure Data

    Analysis Population Description
    Participants in the PK Substudy Analysis Set with available data were analyzed.
    Arm/Group Title TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 5 5 4
    Mean (Standard Deviation) [h*pg/mL]
    7277.3
    (6550.71)
    10239.0
    (6243.75)
    34534.8
    (26482.89)
    17. Secondary Outcome
    Title PK Parameter: %AUCexp of Vesatolimod
    Description %AUCexp is defined as the percentage of AUC extrapolated between AUClast and AUCinf.
    Time Frame Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose

    Outcome Measure Data

    Analysis Population Description
    Participants in the PK Substudy Analysis Set were analyzed.
    Arm/Group Title TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 5 5 4
    Mean (Standard Deviation) [Percentage of AUC]
    31.1
    (19.70)
    28.6
    (11.42)
    19.3
    (6.15)
    18. Secondary Outcome
    Title PK Parameter: Cmax of Vesatolimod
    Description Cmax is defined as the maximum concentration of drug.
    Time Frame Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose

    Outcome Measure Data

    Analysis Population Description
    Participants in the PK Substudy Analysis Set were analyzed.
    Arm/Group Title TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 5 5 4
    Mean (Standard Deviation) [picogram/milliliter (pg/mL)]
    667.8
    (785.44)
    850.4
    (569.75)
    4957.5
    (5035.46)
    19. Secondary Outcome
    Title PK Parameter: Clast of Vesatolimod
    Description Clast is defined as the last observable concentration of drug.
    Time Frame Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose

    Outcome Measure Data

    Analysis Population Description
    Participants in the PK Substudy Analysis Set were analyzed.
    Arm/Group Title TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 5 5 4
    Mean (Standard Deviation) [pg/mL]
    92.8
    (73.80)
    119.0
    (74.45)
    328.0
    (165.19)
    20. Secondary Outcome
    Title PK Parameter: Tmax of Vesatolimod
    Description Tmax is defined as the time (observed time point) of Cmax
    Time Frame Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose

    Outcome Measure Data

    Analysis Population Description
    Participants in the PK Substudy Analysis Set were analyzed.
    Arm/Group Title TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 5 5 4
    Median (Full Range) [hours]
    1.00
    2.00
    3.00
    21. Secondary Outcome
    Title PK Parameter: Tlast of Vesatolimod
    Description Tlast is defined as the time (observed time point) of Clast.
    Time Frame Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose

    Outcome Measure Data

    Analysis Population Description
    Participants in the PK Substudy Analysis Set were analyzed.
    Arm/Group Title TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 5 5 4
    Median (Full Range) [hours]
    24.00
    24.00
    24.00
    22. Secondary Outcome
    Title PK Parameter: T1/2 of Vesatolimod
    Description T1/2 is defined as the estimate of the terminal elimination half-life of the drug.
    Time Frame Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose

    Outcome Measure Data

    Analysis Population Description
    Participants in the PK Substudy Analysis Set were analyzed.
    Arm/Group Title TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 5 5 4
    Median (Full Range) [hours]
    10.79
    14.12
    13.32
    23. Secondary Outcome
    Title PK Parameter: CL/F of Vesatolimod
    Description CL/F is defined as the apparent oral clearance following administration of the drug.
    Time Frame Week 11: Predose, 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours postdose

    Outcome Measure Data

    Analysis Population Description
    Participants in the PK Substudy Analysis Set were analyzed.
    Arm/Group Title TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses.
    Measure Participants 5 5 4
    Mean (Standard Deviation) [liter/hour]
    273.9
    (270.58)
    262.3
    (144.45)
    156.2
    (72.48)

    Adverse Events

    Time Frame First dose date up to last dose of study drug (Maximum: 144 weeks)
    Adverse Event Reporting Description The Safety Analysis Set included all participants who took at least 1 dose of study drug.
    Arm/Group Title TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg TDF Extension From TDF + Placebo TDF Extension From TDF + Vesatolimod 1 mg TDF Extension From TDF + Vesatolimod 2 mg TDF Extension From TDF + Vesatolimod 4 mg
    Arm/Group Description Main Study Phase: Tenofovir disoproxil fumarate (TDF) 300 mg tablets orally once daily for up to 48 weeks + placebo administered orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod (GS 9620) 1 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 2 mg tablet orally once a week (every 7 days) for 12 doses. Main Study Phase: TDF 300 mg tablets orally once daily for up to 48 weeks + vesatolimod 4 mg tablet orally once a week (every 7 days) for 12 doses. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144; Includes participants who received TDF + Placebo in the Main Study Phase. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144; includes participants who received TDF + Vesatolimod 1 mg in the Main Study Phase. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144; includes participants who received TDF + Vesatolimod 2 mg in the Main Study Phase. Optional Treatment Extension Phase: At Week 48 participants had the option to continue TDF 300 mg tablets orally once daily up to Week 144; includes participants who received TDF + Vesatolimod 4 mg in the Main Study Phase.
    All Cause Mortality
    TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg TDF Extension From TDF + Placebo TDF Extension From TDF + Vesatolimod 1 mg TDF Extension From TDF + Vesatolimod 2 mg TDF Extension From TDF + Vesatolimod 4 mg
    Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events
    Total 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 0/51 (0%) 0/54 (0%) 0/49 (0%)
    Serious Adverse Events
    TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg TDF Extension From TDF + Placebo TDF Extension From TDF + Vesatolimod 1 mg TDF Extension From TDF + Vesatolimod 2 mg TDF Extension From TDF + Vesatolimod 4 mg
    Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events
    Total 0/28 (0%) 1/53 (1.9%) 1/56 (1.8%) 1/55 (1.8%) 1/27 (3.7%) 4/51 (7.8%) 5/54 (9.3%) 1/49 (2%)
    Gastrointestinal disorders
    Abdominal pain 0/28 (0%) 0/53 (0%) 0/56 (0%) 1/55 (1.8%) 0/27 (0%) 0/51 (0%) 0/54 (0%) 0/49 (0%)
    Large intestine polyp 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 0/51 (0%) 1/54 (1.9%) 0/49 (0%)
    General disorders
    Chest pain 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 0/51 (0%) 1/54 (1.9%) 0/49 (0%)
    Pyrexia 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 0/51 (0%) 0/54 (0%) 1/49 (2%)
    Injury, poisoning and procedural complications
    Skin laceration 0/28 (0%) 1/53 (1.9%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 0/51 (0%) 0/54 (0%) 0/49 (0%)
    Tendon rupture 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 0/51 (0%) 1/54 (1.9%) 0/49 (0%)
    Neoplasms benign, malignant and unspecified (incl cysts and polyps)
    Breast cancer 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 1/51 (2%) 0/54 (0%) 0/49 (0%)
    Hepatocellular carcinoma 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 2/51 (3.9%) 1/54 (1.9%) 0/49 (0%)
    Leiomyoma 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 1/27 (3.7%) 0/51 (0%) 0/54 (0%) 0/49 (0%)
    Nervous system disorders
    Facial paralysis 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 0/51 (0%) 1/54 (1.9%) 0/49 (0%)
    Hemiparesis 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 0/51 (0%) 1/54 (1.9%) 0/49 (0%)
    Transient ischaemic attack 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 0/51 (0%) 1/54 (1.9%) 0/49 (0%)
    Reproductive system and breast disorders
    Adenomyosis 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 1/51 (2%) 0/54 (0%) 0/49 (0%)
    Pelvic congestion 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 0/51 (0%) 1/54 (1.9%) 0/49 (0%)
    Uterine haemorrhage 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 1/27 (3.7%) 0/51 (0%) 0/54 (0%) 0/49 (0%)
    Uterine polyp 0/28 (0%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 0/51 (0%) 1/54 (1.9%) 0/49 (0%)
    Respiratory, thoracic and mediastinal disorders
    Asthma 0/28 (0%) 0/53 (0%) 1/56 (1.8%) 0/55 (0%) 0/27 (0%) 0/51 (0%) 0/54 (0%) 0/49 (0%)
    Other (Not Including Serious) Adverse Events
    TDF + Placebo TDF + Vesatolimod 1 mg TDF + Vesatolimod 2 mg TDF + Vesatolimod 4 mg TDF Extension From TDF + Placebo TDF Extension From TDF + Vesatolimod 1 mg TDF Extension From TDF + Vesatolimod 2 mg TDF Extension From TDF + Vesatolimod 4 mg
    Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events
    Total 14/28 (50%) 25/53 (47.2%) 27/56 (48.2%) 33/55 (60%) 7/27 (25.9%) 14/51 (27.5%) 13/54 (24.1%) 12/49 (24.5%)
    Gastrointestinal disorders
    Abdominal distension 2/28 (7.1%) 3/53 (5.7%) 1/56 (1.8%) 1/55 (1.8%) 0/27 (0%) 0/51 (0%) 0/54 (0%) 2/49 (4.1%)
    Abdominal pain upper 2/28 (7.1%) 3/53 (5.7%) 1/56 (1.8%) 0/55 (0%) 0/27 (0%) 2/51 (3.9%) 1/54 (1.9%) 1/49 (2%)
    Diarrhoea 0/28 (0%) 4/53 (7.5%) 2/56 (3.6%) 5/55 (9.1%) 0/27 (0%) 1/51 (2%) 1/54 (1.9%) 1/49 (2%)
    Dyspepsia 2/28 (7.1%) 1/53 (1.9%) 3/56 (5.4%) 1/55 (1.8%) 1/27 (3.7%) 0/51 (0%) 1/54 (1.9%) 1/49 (2%)
    Nausea 3/28 (10.7%) 5/53 (9.4%) 3/56 (5.4%) 5/55 (9.1%) 0/27 (0%) 0/51 (0%) 2/54 (3.7%) 0/49 (0%)
    Vomiting 0/28 (0%) 2/53 (3.8%) 0/56 (0%) 5/55 (9.1%) 0/27 (0%) 0/51 (0%) 0/54 (0%) 0/49 (0%)
    General disorders
    Asthenia 2/28 (7.1%) 1/53 (1.9%) 2/56 (3.6%) 3/55 (5.5%) 0/27 (0%) 1/51 (2%) 0/54 (0%) 0/49 (0%)
    Chills 1/28 (3.6%) 2/53 (3.8%) 6/56 (10.7%) 10/55 (18.2%) 0/27 (0%) 0/51 (0%) 1/54 (1.9%) 0/49 (0%)
    Fatigue 6/28 (21.4%) 8/53 (15.1%) 6/56 (10.7%) 14/55 (25.5%) 0/27 (0%) 2/51 (3.9%) 1/54 (1.9%) 2/49 (4.1%)
    Influenza like illness 1/28 (3.6%) 1/53 (1.9%) 0/56 (0%) 5/55 (9.1%) 0/27 (0%) 0/51 (0%) 0/54 (0%) 1/49 (2%)
    Pyrexia 1/28 (3.6%) 4/53 (7.5%) 5/56 (8.9%) 11/55 (20%) 0/27 (0%) 2/51 (3.9%) 0/54 (0%) 0/49 (0%)
    Infections and infestations
    Gingivitis 2/28 (7.1%) 0/53 (0%) 0/56 (0%) 0/55 (0%) 0/27 (0%) 1/51 (2%) 1/54 (1.9%) 0/49 (0%)
    Nasopharyngitis 3/28 (10.7%) 2/53 (3.8%) 2/56 (3.6%) 1/55 (1.8%) 0/27 (0%) 5/51 (9.8%) 1/54 (1.9%) 1/49 (2%)
    Upper respiratory tract infection 3/28 (10.7%) 3/53 (5.7%) 0/56 (0%) 4/55 (7.3%) 2/27 (7.4%) 3/51 (5.9%) 4/54 (7.4%) 2/49 (4.1%)
    Metabolism and nutrition disorders
    Decreased appetite 1/28 (3.6%) 1/53 (1.9%) 3/56 (5.4%) 1/55 (1.8%) 0/27 (0%) 0/51 (0%) 0/54 (0%) 0/49 (0%)
    Musculoskeletal and connective tissue disorders
    Arthralgia 0/28 (0%) 3/53 (5.7%) 3/56 (5.4%) 10/55 (18.2%) 0/27 (0%) 2/51 (3.9%) 0/54 (0%) 0/49 (0%)
    Back pain 0/28 (0%) 2/53 (3.8%) 4/56 (7.1%) 2/55 (3.6%) 2/27 (7.4%) 2/51 (3.9%) 0/54 (0%) 1/49 (2%)
    Myalgia 3/28 (10.7%) 5/53 (9.4%) 4/56 (7.1%) 9/55 (16.4%) 0/27 (0%) 0/51 (0%) 0/54 (0%) 0/49 (0%)
    Pain in extremity 0/28 (0%) 2/53 (3.8%) 3/56 (5.4%) 1/55 (1.8%) 0/27 (0%) 0/51 (0%) 0/54 (0%) 0/49 (0%)
    Nervous system disorders
    Dizziness 3/28 (10.7%) 3/53 (5.7%) 1/56 (1.8%) 5/55 (9.1%) 0/27 (0%) 0/51 (0%) 0/54 (0%) 1/49 (2%)
    Headache 5/28 (17.9%) 4/53 (7.5%) 10/56 (17.9%) 12/55 (21.8%) 0/27 (0%) 2/51 (3.9%) 0/54 (0%) 1/49 (2%)
    Respiratory, thoracic and mediastinal disorders
    Cough 0/28 (0%) 3/53 (5.7%) 0/56 (0%) 2/55 (3.6%) 2/27 (7.4%) 2/51 (3.9%) 1/54 (1.9%) 3/49 (6.1%)
    Oropharyngeal pain 1/28 (3.6%) 5/53 (9.4%) 1/56 (1.8%) 1/55 (1.8%) 1/27 (3.7%) 0/51 (0%) 2/54 (3.7%) 0/49 (0%)
    Skin and subcutaneous tissue disorders
    Pruritus 0/28 (0%) 3/53 (5.7%) 1/56 (1.8%) 2/55 (3.6%) 1/27 (3.7%) 0/51 (0%) 0/54 (0%) 0/49 (0%)

    Limitations/Caveats

    [Not Specified]

    More Information

    Certain Agreements

    Principal Investigators are NOT employed by the organization sponsoring the study.

    After conclusion of the study and without prior written approval from Gilead, investigators in this study may communicate, orally present, or publish in scientific journals or other media only after the following conditions have been met: The results of the study in their entirety have been publicly disclosed by or with the consent of Gilead in an abstract, manuscript, or presentation form; or The study has been completed at all study sites for at least 2 years

    Results Point of Contact

    Name/Title Gilead Clinical Study Information Center
    Organization Gilead Sciences
    Phone 1-833-445-3230 (GILEAD-0)
    Email GileadClinicalTrials@gilead.com
    Responsible Party:
    Gilead Sciences
    ClinicalTrials.gov Identifier:
    NCT02579382
    Other Study ID Numbers:
    • GS-US-283-1062
    • 2015-002017-30
    First Posted:
    Oct 19, 2015
    Last Update Posted:
    May 18, 2020
    Last Verified:
    May 1, 2020