A Phase 2 interventional study of Inarigivir Soproxil and TAF in Chronic Hepatitis B, sponsored by Gilead Sciences. Terminated at 13 sites in 2 countries. Open to participants aged 18 Years to 70 Years. Per ClinicalTrials.gov, last updated 2022-04-04.
Sponsored by Gilead Sciences · Phase 2, Interventional, and Treatment
The primary objectives of this study are to evaluate the safety and tolerability of the 12 week treatment regimens of inarigivir soproxil plus tenofovir alafenamide (TAF) or commercially available nucleoside/nucleotide (NUC) in adults with chronic hepatitis B (CHB), to evaluate the antiviral activity of 12 weeks of inarigivir soproxil plus TAF versus TAF alone in viremic CHB participants (Groups 1-3, 5), and to evaluate the antiviral activity of 12 weeks of inarigivir soproxil with commercially available NUC(s) in virally suppressed CHB participants (Group 4).
Key Inclusion Criteria:
Groups 1-3 and 5:
Group 4:
Key Exclusion Criteria:
Note: Other protocol defined Inclusion/Exclusion criteria may apply.
Viremic participants will be administered inarigivir soproxil 50 mg (2 x 25 mg capsules) once daily orally 1 hour before or 1 hour after a meal plus TAF 25 mg tablet once daily orally with food for 12 weeks followed by TAF 25 mg tablet once daily orally with food for 36 weeks.
Drug: Inarigivir Soproxil · Drug: TAF
Viremic participants will be administered TAF 25 mg tablet once daily orally with food for 48 weeks.
Drug: TAF
Viremic participants will be administered inarigivir soproxil 200 mg (2 x 100 mg tablets) once daily orally 1 hour before or 1 hour after a meal plus TAF 25 mg tablet once daily orally with food for 12 weeks followed by TAF 25 mg tablet once daily orally with food for 36 weeks
Drug: Inarigivir Soproxil · Drug: TAF
Virally suppressed participants receiving commercially available nucleoside/nucleotide (NUC) will be administered inarigivir soproxil 100 mg tablet once daily orally 1 hour before or 1 hour after a meal for 12 weeks. Participants will continue commercially available NUCs for 48 weeks.
Drug: Inarigivir Soproxil
Viremic participants will be administered inarigivir soproxil 400 mg (2 x 200 mg tablets) once daily orally 1 hour before or 1 hour after a meal plus TAF 25 mg tablet once daily orally with food for 12 weeks followed TAF 25 mg tablet once daily orally with food for 36 weeks.
Drug: Inarigivir Soproxil · Drug: TAF
Administered orally once daily one hour before or one hour after a meal
Also known as: SB 9200, GS-9992
Administered orally once daily with food
Also known as: GS-7340, Vemlidy®
Percentage of Participants With ≥ 0.5 log10 IU/mL Decline in HBsAg From Baseline at Week 12 (Groups 1-3 and 5)
Time frame: Baseline, Week 12
Percentage of Participants With ≥ 0.5 log10 IU/mL Decline in HBsAg From Baseline at Week 12 (Group 4)
Time frame: Baseline, Week 12
Percentage of Participants With ≥ 1 log10 IU/mL Decline in HBsAg From Baseline at Week 12 (Groups 1 Through 3 and 5)
Time frame: Baseline, Week 12
Percentage of Participants With ≥ 1 log10 IU/mL Decline in HBsAg From Baseline at Week 12 (Group 4)
Time frame: Baseline, Week 12
Percentage of HBeAg-positive Participants Who Achieved HBeAg Loss and Seroconversion at Weeks 12, 24, 36, and 48 (Groups 1 Through 3 and 5)
HBeAg loss was defined as qualitative HBeAg result changing from positive at baseline to negative at post-baseline visit. HBeAg seroconversion was defined as HBeAb changing from negative or missing at baseline to positive at any postbaseline visit. Participants who had missing information were assumed to have no HBeAg loss and no HBeAg seroconversion.
Time frame: Baseline, Weeks 12, 24, 36, and 48
Percentage of HBeAg-positive Participants Who Achieved HBeAg Loss and Seroconversion at Weeks 12, 24, 36, and 48 (Group 4)
HBeAg loss was defined as qualitative HBeAg result changing from positive at baseline to negative at post-baseline visit. HBeAg seroconversion was defined as HBeAb changing from negative or missing at baseline to positive at any postbaseline visit. Participants who had missing information were assumed to have no HBeAg loss and no HBeAg seroconversion.
Time frame: Baseline, Weeks 12, 24, 36, and 48
Percentage of Participants Who Achieved HBsAg Loss at Weeks 12, 24, 36, and 48 (Groups 1 Through 3 and 5)
HBeAg loss was defined as qualitative HBeAg result changing from positive at baseline to negative at post-baseline visit. Participants who had missing information were assumed to have no HBeAg loss.
Time frame: Baseline, Weeks 12, 24, 36, and 48
Percentage of Participants Who Achieved HBsAg Loss at Weeks 12, 24, 36, and 48 (Group 4)
HBeAg loss was defined as qualitative HBeAg result changing from positive at baseline to negative at post-baseline visit.
Time frame: Baseline, Weeks 12, 24, 36, and 48
Number of Participants With Sequence Changes From Baseline Within the HBV Polymerase for Participants Who Had HBV DNA ≥ 69 IU/mL (Groups 1 Through 3 and 5)
Time frame: Baseline, Week 48
Percentage of Participants Experiencing Hepatitis B Virus (HBV) Virologic Breakthrough During 12 Weeks of Inarigivir Soproxil Treatment (Group 4)
Virologic breakthrough was defined as HBV deoxyribonucleic acid (DNA) ≥69 IU/mL for 2 consecutive visits
Time frame: Baseline up to Week 12
Change From Baseline in HBV DNA at Weeks 12, 16, 24, 36, and 48 (Groups 1 Through 3 and 5)
Time frame: Baseline, Weeks 12, 16, 24, 36, and 48
Change From Baseline in HBsAg at Weeks 12, 16, 24, 36, and 48 (Groups 1 Through 3 and 5)
Time frame: Baseline, Weeks 12, 16, 24, 36, and 48
Change From Baseline in HBsAg at Weeks 12, 16, 24, 36, and 48 (Group 4)
Time frame: Baseline, Weeks 12, 16, 24, 36, and 48
Participants were enrolled at study sites in Hong Kong and South Korea. The first participant was screened on 28 February 2018. The last study visit occurred on 26 January 2021.
| Milestone | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) | Group 5: Inarigivir Soproxil 400 mg + TAF |
|---|---|---|---|---|---|
| Started | 30 | 12 | 30 | 21 | 30 |
| Completed | 16 | 9 | 16 | 18 | 12 |
| Not completed | 14 | 3 | 14 | 3 | 18 |
| Withdrew: Started commercial hepatitis b virus therapy | 10 | 3 | 11 | 3 | 17 |
| Withdrew: Withdrew consent | 1 | 0 | 3 | 0 | 0 |
| Withdrew: Adverse event | 1 | 0 | 0 | 0 | 1 |
| Withdrew: Lost to follow-up | 2 | 0 | 0 | 0 | 0 |
| percentage of participants | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 5: Inarigivir Soproxil 400 mg + TAF |
|---|---|---|---|---|
| Percentage of Participants With ≥ 0.5 log10 IU/mL Decline in HBsAg From Baseline at Week 12 (Groups 1-3 and 5) | 23.3 (9.9 to 42.3) | 25.0 (5.5 to 57.2) | 0 (0.0 to 11.6) | 6.7 (0.8 to 22.1) |
| percentage of participants | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) |
|---|---|
| Percentage of Participants With ≥ 0.5 log10 IU/mL Decline in HBsAg From Baseline at Week 12 (Group 4) | 0 (0.0 to 16.1) |
| percentage of participants | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 5: Inarigivir Soproxil 400 mg + TAF |
|---|---|---|---|---|
| Percentage of Participants With ≥ 1 log10 IU/mL Decline in HBsAg From Baseline at Week 12 (Groups 1 Through 3 and 5) | 0 (0.0 to 11.6) | 16.7 (2.1 to 48.4) | 0 (0.0 to 11.6) | 0 (0.0 to 11.6) |
| percentage of participants | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) |
|---|---|
| Percentage of Participants With ≥ 1 log10 IU/mL Decline in HBsAg From Baseline at Week 12 (Group 4) | 0 (0.0 to 16.1) |
HBeAg loss was defined as qualitative HBeAg result changing from positive at baseline to negative at post-baseline visit. HBeAg seroconversion was defined as HBeAb changing from negative or missing at baseline to positive at any postbaseline visit. Participants who had missing information were assumed to have no HBeAg loss and no HBeAg seroconversion.
| percentage of participants | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 5: Inarigivir Soproxil 400 mg + TAF |
|---|---|---|---|---|
| Week 12 | 5.6 | 0 | 0 | 0 |
| Week 24 | 5.6 | 0 | 0 | 0 |
| Week 36 | 5.6 | 0 | 0 | 0 |
| Week 48 | 0 | 0 | 0 | 0 |
HBeAg loss was defined as qualitative HBeAg result changing from positive at baseline to negative at post-baseline visit. HBeAg seroconversion was defined as HBeAb changing from negative or missing at baseline to positive at any postbaseline visit. Participants who had missing information were assumed to have no HBeAg loss and no HBeAg seroconversion.
| percentage of participants | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) |
|---|---|
| Week 12 | 14.3 |
| Week 24 | 14.3 |
| Week 36 | 14.3 |
| Week 48 | 14.3 |
HBeAg loss was defined as qualitative HBeAg result changing from positive at baseline to negative at post-baseline visit. Participants who had missing information were assumed to have no HBeAg loss.
| percentage of participants | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 5: Inarigivir Soproxil 400 mg + TAF |
|---|---|---|---|---|
| Week 12 | 0 | 0 | 0 | 0 |
| Week 24 | 0 | 0 | 0 | 0 |
| Week 36 | 0 | 0 | 0 | 0 |
| Week 48 | 0 | 0 | 0 | 0 |
HBeAg loss was defined as qualitative HBeAg result changing from positive at baseline to negative at post-baseline visit.
| percentage of participants | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) |
|---|---|
| Week 12 | 0 |
| Week 24 | 0 |
| Week 36 | 0 |
| Week 48 | 0 |
| Participants | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 5: Inarigivir Soproxil 400 mg + TAF |
|---|---|---|---|---|
| Number of Participants With Sequence Changes From Baseline Within the HBV Polymerase for Participants Who Had HBV DNA ≥ 69 IU/mL (Groups 1 Through 3 and 5) | 4 | 0 | 0 | 4 |
Virologic breakthrough was defined as HBV deoxyribonucleic acid (DNA) ≥69 IU/mL for 2 consecutive visits
| percentage of participants | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) |
|---|---|
| Percentage of Participants Experiencing Hepatitis B Virus (HBV) Virologic Breakthrough During 12 Weeks of Inarigivir Soproxil Treatment (Group 4) | 0 |
| log10 IU/mL | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 5: Inarigivir Soproxil 400 mg + TAF |
|---|---|---|---|---|
| Baseline | 7.06 ± 1.530 | 7.06 ± 1.757 | 6.30 ± 1.365 | 6.61 ± 1.479 |
| Change at Week 12 | -4.18 ± 0.959 | -4.24 ± 1.340 | -4.02 ± 0.854 | -3.93 ± 0.817 |
| Change at Week 16 | -4.58 ± 1.023 | -4.65 ± 1.326 | -4.29 ± 0.946 | -4.23 ± 0.869 |
| Change at Week 24 | -5.02 ± 1.101 | -5.25 ± 1.510 | -4.67 ± 1.049 | -4.76 ± 1.013 |
| Change at Week 36 | -5.27 ± 1.194 | -5.53 ± 1.610 | -4.78 ± 1.207 | -4.92 ± 1.129 |
| Change at Week 48 | -5.36 ± 1.225 | -5.25 ± 1.839 | -4.83 ± 1.162 | -4.93 ± 1.370 |
| log10 IU/mL | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 5: Inarigivir Soproxil 400 mg + TAF |
|---|---|---|---|---|
| Baseline | 3.933 ± 0.8058 | 4.118 ± 0.6543 | 3.529 ± 0.8835 | 3.418 ± 0.8075 |
| Change at Week 12 | -0.244 ± 0.3443 | -0.435 ± 0.5320 | 0.016 ± 0.2850 | -0.026 ± 0.3805 |
| Change at Week 16 | -0.282 ± 0.3954 | -0.479 ± 0.5429 | 0.014 ± 0.2916 | -0.082 ± 0.4262 |
| Change at Week 24 | -0.310 ± 0.4303 | -0.482 ± 0.5119 | -0.021 ± 0.3171 | -0.104 ± 0.5000 |
| Change at Week 36 | -0.330 ± 0.4363 | -0.524 ± 0.5430 | -0.055 ± 0.4213 | -0.209 ± 0.5319 |
| Change at Week 48 | -0.322 ± 0.4311 | -0.517 ± 0.5617 | -0.045 ± 0.4778 | -0.235 ± 0.5429 |
| log10 IU/mL | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) |
|---|---|
| Baseline | 3.211 ± 0.5536 |
| Change at Week 12 | -0.017 ± 0.0417 |
| Change at Week 16 | -0.010 ± 0.0645 |
| Change at Week 24 | -0.039 ± 0.0925 |
| Change at Week 36 | -0.037 ± 0.0939 |
| Change at Week 48 | -0.073 ± 0.1120 |
Collected over All-cause mortality: From randomization/enrollment up to Week 48 + 3 days Adverse events: Groups 1, 2, 3, 5: From first dose up to Week 48 + 3 days Group 4: From first dose up to Week 12 + 30 days (for Group 4, adverse events were planned to be collected only up to Week 12 + 30 days). Non-serious events are listed at a 5% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Group 1: Inarigivir Soproxil 50 mg + TAF | 0/30 (0%) | 1/30 (3.3%) | 8/30 (26.7%) |
| Group 2: TAF | 0/12 (0%) | 1/12 (8.3%) | 7/12 (58.3%) |
| Group 3: Inarigivir Soproxil 200 mg + TAF | 0/30 (0%) | 1/30 (3.3%) | 15/30 (50%) |
| Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) | 0/21 (0%) | 0/21 (0%) | 9/21 (42.9%) |
| Group 5: Inarigivir Soproxil 400 mg + TAF | 0/30 (0%) | 1/30 (3.3%) | 9/30 (30%) |
| Event | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) | Group 5: Inarigivir Soproxil 400 mg + TAF |
|---|---|---|---|---|---|
| Carpal tunnel syndromeNervous system disorders | 0/30 | 1/12 | 0/30 | 0/21 | 0/30 |
| Abdominal pain upperGastrointestinal disorders | 0/30 | 0/12 | 1/30 | 0/21 | 0/30 |
| Campylobacter gastroenteritisInfections and infestations | 1/30 | 0/12 | 0/30 | 0/21 | 0/30 |
| Alanine aminotransferase increasedInvestigations | 0/30 | 0/12 | 0/30 | 0/21 | 1/30 |
| Event | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) | Group 5: Inarigivir Soproxil 400 mg + TAF |
|---|---|---|---|---|---|
| Influenza like illnessGeneral disorders | 0/30 | 0/12 | 2/30 | 6/21 | 1/30 |
| Upper respiratory tract infectionInfections and infestations | 1/30 | 3/12 | 6/30 | 1/21 | 3/30 |
| Alanine aminotransferase increasedInvestigations | 4/30 | 1/12 | 1/30 | 1/21 | 0/30 |
| HeadacheNervous system disorders | 1/30 | 0/12 | 3/30 | 0/21 | 2/30 |
| Productive coughRespiratory, thoracic and mediastinal disorders | 0/30 | 0/12 | 1/30 | 0/21 | 3/30 |
| InfluenzaInfections and infestations | 1/30 | 0/12 | 0/30 | 2/21 | 0/30 |
| VertigoEar and labyrinth disorders | 0/30 | 1/12 | 0/30 | 0/21 | 0/30 |
| Hepatic steatosisHepatobiliary disorders | 0/30 | 1/12 | 0/30 | 0/21 | 0/30 |
| Tooth fractureInjury, poisoning and procedural complications | 0/30 | 1/12 | 0/30 | 0/21 | 0/30 |
| MyalgiaMusculoskeletal and connective tissue disorders | 0/30 | 1/12 | 0/30 | 0/21 | 0/30 |
The Safety Analysis Set included all participants who took at least 1 dose of any study drug.
| Age, Customized(Participants) | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) | Group 5: Inarigivir Soproxil 400 mg + TAF | Total |
|---|---|---|---|---|---|---|
| <50 years | 23 | 5 | 19 | 11 | 13 | 71 |
| ≥50 years | 7 | 7 | 11 | 10 | 17 | 52 |
| Sex: Female, Male(Participants) | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) | Group 5: Inarigivir Soproxil 400 mg + TAF | Total |
|---|---|---|---|---|---|---|
| Female | 12 | 3 | 11 | 9 | 11 | 46 |
| Male | 18 | 9 | 19 | 12 | 19 | 77 |
| Ethnicity (NIH/OMB)(Participants) | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) | Group 5: Inarigivir Soproxil 400 mg + TAF | Total |
|---|---|---|---|---|---|---|
| Hispanic or Latino | 0 | 0 | 0 | 0 | 0 | 0 |
| Not Hispanic or Latino | 30 | 12 | 30 | 21 | 30 | 123 |
| Unknown or Not Reported | 0 | 0 | 0 | 0 | 0 | 0 |
| Race (NIH/OMB)(Participants) | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) | Group 5: Inarigivir Soproxil 400 mg + TAF | Total |
|---|---|---|---|---|---|---|
| American Indian or Alaska Native | 0 | 0 | 0 | 0 | 0 | 0 |
| Asian | 30 | 12 | 30 | 21 | 30 | 123 |
| Native Hawaiian or Other Pacific Islander | 0 | 0 | 0 | 0 | 0 | 0 |
| Black or African American | 0 | 0 | 0 | 0 | 0 | 0 |
| White | 0 | 0 | 0 | 0 | 0 | 0 |
| More than one race | 0 | 0 | 0 | 0 | 0 | 0 |
| Unknown or Not Reported | 0 | 0 | 0 | 0 | 0 | 0 |
| Region of Enrollment(participants) | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) | Group 5: Inarigivir Soproxil 400 mg + TAF | Total |
|---|---|---|---|---|---|---|
| Hong Kong | 8 | 5 | 22 | 11 | 30 | 76 |
| South Korea | 22 | 7 | 8 | 10 | 0 | 47 |
| Hepatitis B Surface Antigen (HBsAg) Category(Participants) | Group 1: Inarigivir Soproxil 50 mg + TAF | Group 2: TAF | Group 3: Inarigivir Soproxil 200 mg + TAF | Group 4: Inarigivir Soproxil 100 mg + Commercially Available NUC(s) | Group 5: Inarigivir Soproxil 400 mg + TAF | Total |
|---|---|---|---|---|---|---|
| ≤ 4 log10 IU/mL | 16 | 4 | 23 | 19 | 21 | 83 |
| > 4 log10 IU/mL | 14 | 8 | 7 | 2 | 9 | 40 |
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