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GS-4774

Phase 2

Chronic HBV Infection | Monoclonal antibody | Other |Gilead Sciences, Inc.|Last Updated: Nov 1, 2019

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment178
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT01943799Safety and Efficacy of GS-4774 for the Treatment of Chronic Hepatitis BPHASE2 COMPLETED 178Sep 13, 2013Mar 3, 2015Nov 1, 201917 United States, New Zealand
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Study Endpoints
Primary Endpoints
Change From Baseline in HBsAg at Week 24
Baseline; Week 24

The change from baseline to Week 24 in HBsAg was analyzed using a mixed effect model for repeated measures (MMRM). The model included included treatment, HBsAg baseline level (≤ 1000 IU/mL or \> 1000 IU/mL), HBeAg baseline status (positive or negative), visit, and treatment-by-visit interaction as fixed effects and visit as a repeated measure.

Secondary Endpoints
Change From Baseline in HBsAg at Week 12
Baseline; Week 12
Change From Baseline in HBsAg at Week 48
Baseline; Week 48
Percentage of Participants With HBsAg Loss and HBsAg Seroconversion at Week 24
Week 24
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
OAV AloneEXPERIMENTALParticipants will continue their prebaseline OAV regimen alone from baseline to Week 48.
OAV + GS-4774 2 YUEXPERIMENTALParticipants will continue their prebaseline OAV regimen from baseline to Week 48, and will receive GS-4774 2 yeast units (YU) from baseline to Week 20.
OAV + GS-4774 10 YUEXPERIMENTALParticipants will continue their prebaseline OAV regimen from baseline to Week 48, and will receive GS-4774 10 YU from baseline to Week 20.
OAV + GS-4774 40 YUEXPERIMENTALParticipants will continue their prebaseline OAV regimen from baseline to Week 48, and will receive GS-4774 40 YU from baseline to Week 20.
Interventions
NameTypeDescription
GS-4774BIOLOGICALAdministered as a subcutaneous injection every 4 weeks for a total of 6 doses
OAV RegimenDRUGAdministered prior to study enrollment (tenofovir disoproxil fumarate, entecavir, adefovir, lamivudine, or telbivudine either as single agents or in combination)
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Eligibility Criteria
Age Range18 Years — 65 Years
SexALL
Healthy VolunteersNo
Study Sites17

Key Inclusion Criteria: * Ability to understand and sign a written informed consent form, which must be obtained prior to initiation of study procedures * Currently taking an approved HBV oral antiviral medication * Documented evidence of chronic HBV infection (eg, HBsAg positive for more than 6 mo...

Countries:United StatesNew Zealand
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