Phase 2
Completed N=195
Safety and Efficacy of GS-4774 in Combination With Tenofovir Disoproxil Fumarate (TDF) for the Treatment of Participants With Chronic Hepatitis B (CHB) and Who Are Currently Not on Treatment
Source: ClinicalTrials.gov NCT02174276 ↗Enrolled (actual)
195
Serious AEs
2.6%
Results posted
Jun 2019
Primary outcomePrimary: Mean Change in Serum HBsAg From Baseline to Week 24 — -0.079; -0.096; -0.016; -0.135 log10 IU/mL — p=0.805
Summary
The primary objectives of this study are to evaluate the safety, tolerability, and efficacy of GS-4774 in adults with CHB and who are currently not on treatment. Participants will be randomized to receive TDF alone or GS-4774 plus TDF for 20 weeks. After Week 20, GS-4774 will be discontinued. All participants will continue on TDF and will be followed for an additional 28 weeks. Following completion of the 48 week study period, all participants will be eligible for a treatment extension for 96 weeks.
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Mean Change in Serum HBsAg From Baseline to Week 24 |
-0.079; -0.096; -0.016; -0.135 | 0.805 |
| SECONDARY Mean Change in HBsAg From Baseline to Week 12 |
-0.060; -0.061; -0.012; -0.095 | — |
| SECONDARY Mean Change in HBsAg From Baseline to Week 48 |
-0.145; -0.136; -0.086; -0.165 | — |
| SECONDARY Percentage of Participants With HBsAg Loss at Week 24 |
0.0; 0.0; 0.0; 0.0 | — |
| SECONDARY Percentage of Participants With HBsAg Loss at Week 48 |
0.0; 0.0; 0.0; 0.0 | — |
| SECONDARY Composite Endpoint Measuring the Percentage of Participants With HBsAg Loss and HBsAg Seroconversion at Week 24 |
0.0; 0.0; 0.0; 0.0 | — |
| SECONDARY Composite Endpoint Measuring the Percentage of Participants With HBsAg Loss and HBsAg Seroconversion at Week 48 |
0.0; 0.0; 0.0; 0.0 | — |
| SECONDARY Percentage of Participants With a ≥ 0.5 Log10 IU/mL or a ≥ 1.0 Log10 IU/mL Decline in HBsAg at Week 12 |
3.7; 3.5; 1.8; 5.5; 0.0; 3.5 | — |
| SECONDARY Percentage of Participants With a ≥ 0.5 Log10 IU/mL or a ≥ 1.0 Log10 IU/mL Decline in HBsAg at Week 24 |
0.0; 1.8; 1.8; 7.3; 0.0; 5.3 | — |
| SECONDARY Percentage of Participants With a ≥ 0.5 Log10 IU/mL or a ≥ 1.0 Log10 IU/mL Decline in HBsAg at Week 48 |
11.1; 1.8; 7.1; 7.3; 0.0; 5.3 | — |
| SECONDARY Percentage of Participants With HBeAg Loss at Week 24 |
0.0; 0.0; 4.3; 0.0 | — |
| SECONDARY Percentage of Participants With HBeAg Loss at Week 48 |
0.0; 4.5; 8.7; 9.5 | — |
| SECONDARY Composite Endpoint Measuring the Percentage of Participants With HBeAg Loss and HBeAg Seroconversion at Week 24 |
0.0; 0.0; 4.3; 0.0 | — |
| SECONDARY Composite Endpoint Measuring the Percentage of Participants With HBeAg Loss and HBeAg Seroconversion at Week 48 |
0.0; 0.0; 4.3; 9.5 | — |
| SECONDARY Percentage of Participants With HBV DNA < Lower Limit of Quantification (LLOQ) at Week 24 |
50.0; 58.9; 58.5; 63.6 | — |
| SECONDARY Percentage of Participants With HBV DNA < LLOQ at Week 48 |
70.4; 69.6; 69.2; 76.4 | — |
| SECONDARY Percentage of Participants Experiencing Virologic Breakthrough at Week 24 |
0.0; 1.8; 1.8; 0.0 | — |
| SECONDARY Percentage of Participants Experiencing Virologic Breakthrough at Week 48 |
3.7; 5.3; 5.4; 0.0 | — |
| SECONDARY Number of Participants With Drug-Resistance Mutations at Week 48 or at the Last Visit Available |
0; 0; 0; 0 | — |
Eligibility Criteria
Key Inclusion Criteria
- Must have the ability to understand and sign a written informed consent form, which must be obtained prior to initiation of study
- Documented evidence of chronic hepatitis B virus (HBV) infection, for example, hepatitis B surface antigen (HBsAg) positive for more than 6 months
- Screening HBV DNA ≥ 2000 IU/mL
- A negative serum pregnancy test is required for females (unless surgically sterile or > 2 years post-menopausal)
Key Exclusion Criteria
- Cirrhosis
- Inadequate liver function
- Co-infection with hepatitis C virus (HCV), HIV or hepatitis D virus (HDV)
- Received antiviral treatment for HBV within 3 months of screening
- Evidence of hepatocellular carcinoma (eg, as evidenced by recent imaging)
- Significant cardiovascular, pulmonary, or neurological disease
- Women who are pregnant or may wish to become pregnant during the course of the study
- Received solid organ or bone marrow transplant
- Received prolonged therapy with immunomodulators (eg, corticosteroids) or biologics (eg, monoclonal antibody, interferon) within 3 months of screening
- Use of investigational agents within 3 months of screening
- Current alcohol or substance abuse judged by the investigator to potentially interfere with individual's compliance
- Receipt of immunoglobulin or other blood products within 3 months prior to enrollment
- History of demyelinating disease (Guillain-Barre), Bell's Palsy, Crohn's disease, Ulcerative colitis, or autoimmune disease
- Documented history of yeast allergy
- Known hypersensitivity to study drugs, metabolites or formulation excipients
- Malignancy within 5 years prior to screening, with the exception of specific cancers that are cured by surgical resection (basal cell skin cancer, etc). Individuals under evaluation for possible malignancy are not eligible
Note: Other protocol defined Inclusion/Exclusion criteria may apply.
Data sourced from ClinicalTrials.gov (NCT02174276). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.