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GSK3389404

Phase 2

Hepatitis B | Small molecule | Infectious Disease |GSK plc|Last Updated: Oct 1, 2020

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
RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials2
Total Enrollment134
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03020745A Study to Assess the Safety, Tolerability, Pharmacokinetics (PK) and Pharmacodynamics (PD) of GSK3389404 in Chronic Hepatitis B (CHB) SubjectsPHASE2 COMPLETED 78Feb 14, 2017Nov 6, 2019Oct 1, 202021 China, Hong Kong +4
NCT02647281First Time in Human Study to Assess the Safety, Tolerability and Pharmacokinetics of GSK3389404 in Healthy SubjectsPHASE1 COMPLETED 56Dec 17, 2015Jan 3, 2017Jul 16, 20192 United Kingdom
Unlock Drug Trial Details
Study Endpoints
Primary Endpoints
Part 1: Change From Baseline in Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) at Indicated Time Points
Baseline (Day 1 pre-dose), Day 1: 1 hour, Day 1: 2 hours, Day 1: 4 hours, Day 1: 8 hours, Day 3, Day 8 and Day 30

SBP and DBP were measured in a supine or semi-supine position after approximately 5 minutes rest. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in SBP and DBP at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose), Days 8, 15, 22, 29, 36, 43, 50, 57, 64, 71, 78, 85, 92, 99, 113, 141 and 169

SBP and DBP were measured in a supine or semi-supine position after approximately 5 minutes rest. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in SBP and DBP at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose), Day 270 and Day 450

SBP and DBP were measured in a supine or semi-supine position after approximately 5 minutes rest. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Heart Rate at Indicated Time Points
Baseline (Day 1 pre-dose), Day 1: 1 hour, Day 1: 2 hours, Day 1: 4 hours, Day 1: 8 hours, Day 3, Day 8 and Day 30

Heart rate was measured in a supine or semi-supine position after approximately 5 minutes rest. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Heart Rate at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose), Days 8, 15, 22, 29, 36, 43, 50, 57, 64, 71, 78, 85, 92, 99, 113, 141 and 169

Heart rate was measured in a supine or semi-supine position after approximately 5 minutes rest. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Heart Rate at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose), Day 270 and Day 450

Heart rate was measured in a supine or semi-supine position after approximately 5 minutes rest. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Respiratory Rate at Indicated Time Points
Baseline (Day 1 pre-dose), Days 3, 8 and 30

Respiratory rate was measured in a supine or semi-supine position after approximately 5 minutes rest. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Respiratory Rate at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose), Days 8, 15, 22, 29, 36, 43, 50, 57, 64, 71, 78, 85, 92, 99, 113, 141 and 169

Respiratory rate was measured in a supine or semi-supine position after approximately 5 minutes rest. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Respiratory Rate at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose), Day 270 and Day 450

Respiratory rate was measured in a supine or semi-supine position after approximately 5 minutes rest. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Body Temperature at Indicated Time Points
Baseline (Day 1 pre-dose), Days 3, 8 and 30

Body temperature was measured in a supine or semi-supine position after approximately 5 minutes rest. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Body Temperature at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose), Days 8, 15, 22, 29, 36, 43, 50, 57, 64, 71, 78, 85, 92, 99, 113, 141 and 169

Body temperature was measured in a supine or semi-supine position after approximately 5 minutes rest. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Body Temperature at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose), Day 270 and Day 450

Body temperature was measured in a supine or semi-supine position after approximately 5 minutes rest. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 1: Number of Participants With Abnormal Findings in Physical Examination
Up to Day 60

Physical examinations included assessment of the dermatologic, cardiovascular, respiratory, gastrointestinal, and neurological systems. Data was not collected and not captured in the database.

Part 2: Number of Participants With Abnormal Findings in Physical Examination (Up to Day 169-Interim Analysis)
Up to Day 169

Physical examinations included assessment of the dermatologic, cardiovascular, respiratory, gastrointestinal, and neurological systems. Data was not collected and not captured in the database.

Part 2: Number of Participants With Abnormal Findings in Physical Examination (Up to Day 450-Optional Follow-up)
Up to Day 450

Physical examinations included assessment of the dermatologic, cardiovascular, respiratory, gastrointestinal, and neurological systems. Data was not collected and not captured in the database.

Part 1: Number of Participants With Maximum Post-Baseline Grade by Category in Hematology and Coagulation Parameters
Up to Day 60

Blood samples were collected for the analysis of following hematology and coagulation parameters: Hemoglobin, Leukocytes, Lymphocytes, Neutrophils, Platelets, Activated partial thromboplastin time (aPTT), Prothrombin international normalized ratio (INR) and Prothrombin time (PT). Laboratory parameters were graded according to Division of Acquired Immune Deficiency Syndrome (DAIDS) Table for Grading the Severity of Adult and Pediatric Adverse Events, Grade 1: mild; Grade 2: moderate; Grade 3: severe; and Grade 4: potentially life-threatening consequences. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Only those hematology and coagulation parameters with maximum post-Baseline grade (Grade 1 to Grade 4) have been presented.

Part 2: Number of Participants With Maximum Post-Baseline Grade by Category in Hematology and Coagulation Parameters (Up to Day 169-Interim Analysis)
Up to Day 169

Blood samples were collected for the analysis of following hematology and coagulation parameters: Hemoglobin, Leukocytes, Lymphocytes, Neutrophils, Platelets, aPTT, Prothrombin INR and PT. Laboratory parameters were graded according to DAIDS Table for Grading the Severity of Adult and Pediatric Adverse Events, Grade 1: mild; Grade 2: moderate; Grade 3: severe; and Grade 4: potentially life-threatening consequences. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Only those hematology and coagulation parameters with maximum post-Baseline grade (Grade 1 to Grade 4) have been presented.

Part 2: Number of Participants With Maximum Post-Baseline Grade by Category in Hematology and Coagulation Parameters (Up to Day 450-Optional Follow-up)
Up to Day 450

Blood samples were collected for the analysis of following hematology and coagulation parameters: Hemoglobin, Leukocytes, Lymphocytes, Neutrophils, Platelets, aPTT, Prothrombin INR and PT. Laboratory parameters were graded according to DAIDS Table for Grading the Severity of Adult and Pediatric Adverse Events, Grade 1: mild; Grade 2: moderate; Grade 3: severe; and Grade 4: potentially life-threatening consequences. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Only those hematology and coagulation parameters with maximum post-Baseline grade (Grade 1 to Grade 4) have been presented.

Part 1: Change From Baseline in Complement C3 and Complement C4 Level at Indicated Time Points
Baseline (Day 1 pre-dose) and Up to Day 60

Blood samples were collected from participants to assess complement C3 and complement C4 levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Complement C3 and Complement C4 Level at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose) and Up to Day 169

Blood samples were collected from participants to assess complement C3 and complement C4 levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Complement C3 and Complement C4 Level at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose) and Up to Day 450

Blood samples were planned to be collected from participants to evaluate change from Baseline in complement C3 and complement C4 levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was to be calculated by subtracting Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Complement Bb Level at Indicated Time Points
Baseline (Day 1 pre-dose) and Up to Day 60

Blood samples were collected from participants to assess complement Bb levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Complement Bb Level at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose) and Up to Day 169

Blood samples were collected from participants to assess complement Bb levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Complement Bb Level at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose) and Up to Day 450

Blood samples were collected from participants to evaluate change from Baseline in complement Bb levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Complement C5a Level at Indicated Time Points
Baseline (Day 1 pre-dose) and Up to Day 60

Blood samples were collected from participants to assess complement C5a levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Complement C5a Level at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose) and Up to Day 169

Blood samples were collected from participants to assess complement C5a levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Complement C5a Level at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose) and Up to Day 450

Blood samples were collected from participants to evaluate change from Baseline in complement C5a levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 1: Number of Participants With Maximum Post-Baseline Grade by Category in Clinical Chemistry Parameters
Up to Day 60

Blood samples were collected for the analysis of following clinical chemistry parameters: Alanine aminotransferase, Albumin, Alkaline phosphatase, Aspartate aminotransferase, Bilirubin, Calcium (high), Calcium (low), Creatine kinase, Creatinine, Glucose (high), Glucose (low), Magnesium, Phosphate, Potassium (high), Potassium (low), Sodium (high), Sodium (low) and Urate. Laboratory parameters were graded according to DAIDS Table for Grading the Severity of Adult and Pediatric Adverse Events, Grade 1: mild; Grade 2: moderate; Grade 3: severe; and Grade 4: potentially life-threatening consequences. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Only those clinical chemistry parameters with maximum post-Baseline grade (Grade 1 to Grade 4) have been presented.

Part 2: Number of Participants With Maximum Post-Baseline Grade by Category in Clinical Chemistry Parameters (Up to Day 169-Interim Analysis)
Up to Day 169

Blood samples were collected for the analysis of following clinical chemistry parameters: Alanine aminotransferase, Albumin, Alkaline phosphatase, Aspartate aminotransferase, Bilirubin, Calcium (high), Calcium (low), Creatine kinase, Creatinine, Glucose (high), Glucose (low), Magnesium, Phosphate, Potassium (high), Potassium (low), Sodium (high), Sodium (low), Urate and glomerular filtration rate (GFR). Laboratory parameters were graded according to DAIDS Table for Grading the Severity of Adult and Pediatric Adverse Events, Grade 1: mild; Grade 2: moderate; Grade 3: severe; and Grade 4: potentially life-threatening consequences. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Only those clinical chemistry parameters with maximum post-Baseline grade (Grade 1 to Grade 4) have been presented.

Part 2: Number of Participants With Maximum Post-Baseline Grade by Category in Clinical Chemistry Parameters (Up to Day 450-Optional Follow-up)
Up to Day 450

Blood samples were collected for the analysis of following clinical chemistry parameters: Alanine aminotransferase, Albumin, Alkaline phosphatase, Aspartate aminotransferase, Bilirubin, Calcium (high), Calcium (low), Creatine kinase, Creatinine, Glucose (high), Glucose (low), Magnesium, Phosphate, Potassium (high), Potassium (low), Sodium (high), Sodium (low), Urate and glomerular filtration rate (GFR). Laboratory parameters were graded according to DAIDS Table for Grading the Severity of Adult and Pediatric Adverse Events, Grade 1: mild; Grade 2: moderate; Grade 3: severe; and Grade 4: potentially life-threatening consequences. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Only those clinical chemistry parameters with maximum post-Baseline grade (Grade 1 to Grade 4) have been presented.

Part 1: Change From Baseline in Urine Albumin at Indicated Time Points
Baseline (Day 1 pre-dose), Days 8, 30 and Follow-up (Day 60)

Urine samples were collected from participants to assess urine albumin levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Urine Albumin at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose), Days 15, 29, 43, 57, 71, 85, 92, 99, 113, 141 and 169

Urine samples were collected from participants to assess urine albumin levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Urine Albumin at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose) and Up to Day 450

Urine samples were planned to be collected from participants to evaluate change from Baseline in urine albumin levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was to be calculated by subtracting Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Urine Creatinine at Indicated Time Points
Baseline (Day 1 pre-dose), Days 8, 30 and Follow-up (Day 60)

Urine samples were collected from participants to assess urine creatinine levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Urine Creatinine at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose), Days 15, 29, 43, 57, 71, 85, 92, 99, 113, 141 and 169

Urine samples were collected from participants to assess urine creatinine levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Urine Creatinine at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose) and Up to Day 450

Urine samples were planned to be collected from participants to evaluate change from Baseline in urine creatinine levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was to be calculated by subtracting Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Urine Potential of Hydrogen (pH) at Indicated Time Points
Baseline (Day 1 pre-dose), Days 3, 8, 30 and Follow-up (Day 60)

Urine samples were collected from participants to assess urine pH levels. Urine pH is an acid-base measurement. pH is measured on a numeric scale ranging from 0 to 14; values on the scale refer to the degree of alkalinity or acidity. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Urine pH at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose), Days 8, 15, 22, 29, 36, 43, 50, 57, 64, 71, 78, 85, 92, 99, 113, 141 and 169

Urine samples were collected from participants to assess urine pH levels. Urine pH is an acid-base measurement. pH is measured on a numeric scale ranging from 0 to 14; values on the scale refer to the degree of alkalinity or acidity. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Urine pH at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose) and Up to Day 450

Urine samples were planned to be collected from participants to evaluate change from Baseline in urine pH levels. Urine pH is an acid-base measurement. pH is measured on a numeric scale ranging from 0 to 14; values on the scale refer to the degree of alkalinity or acidity. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was to be calculated by subtracting Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Urine Specific Gravity at Indicated Time Points
Baseline (Day 1 pre-dose), Days 3, 8, 30 and Follow-up (Day 60)

Urine samples were collected from participants to assess urine specific gravity. Urine specific gravity is a measure of the concentration of solutes in the urine and provides information on the kidney's ability to concentrate urine. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Urine Specific Gravity at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose), Days 8, 15, 22, 29, 36, 43, 50, 57, 64, 71, 78, 85, 92, 99, 113, 141 and 169

Urine samples were collected from participants to assess urine specific gravity. Urine specific gravity is a measure of the concentration of solutes in the urine and provides information on the kidney's ability to concentrate urine. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Urine Specific Gravity at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose) and Up to Day 450

Urine samples were planned to be collected from participants to evaluate change from Baseline in urine specific gravity. Urine specific gravity is a measure of the concentration of solutes in the urine and provides information on the kidney's ability to concentrate urine. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was to be calculated by subtracting Baseline value from the post-dose visit value.

Part 1: Change From Baseline in Urobilinogen at Indicated Time Points
Baseline (Day 1 pre-dose), Days 3, 8, 30 and Follow-up (Day 60)

Urine samples were collected from participants to assess urobilinogen levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Urobilinogen at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose), Days 8, 15, 22, 29, 36, 43, 50, 57, 64, 71, 78, 85, 92, 99, 113, 141 and 169

Urine samples were collected from participants to assess urobilinogen levels. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was calculated by subtracting Baseline value from the post-dose visit value.

Part 2: Change From Baseline in Urobilinogen at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose) and Up to Day 450

Urine samples were planned to be collected from participants to evaluate change from Baseline in urobilinogen. Baseline was defined as the last assessment before the first dose of the study treatment (Day 1 pre-dose). Change from Baseline was to be calculated by subtracting Baseline value from the post-dose visit value.

Part 1: Number of Participants With Abnormal Electrocardiogram (ECG) Findings
Day 1: 2 hours, Day 1: 4 hours, Day 1: 8 hours, Day 3, Day 8 and Day 30

Electrocardiograms were obtained after 5 minutes of rest in the semi-supine or supine position using an ECG machine that automatically calculates the heart rate and measures PR, QRS, QT, and QT duration corrected for heart rate by Fridericia's formula (QTcF) intervals. Clinically significant (CS) and not clinically significant (NCS) abnormal ECG findings have been presented. Clinical significance was based on the medical and scientific judgement of the investigator or qualified designee.

Part 2: Number of Participants With Abnormal ECG Findings (Up to Day 169-Interim Analysis)
Days 29, 57, 85 and 169

Electrocardiogram were obtained after 5 minutes of rest in the semi-supine or supine position using an ECG machine that automatically calculates the heart rate and measures PR, QRS, QT, and QTcF intervals. CS and NCS abnormal ECG findings have been presented. Clinical significance was based on the medical and scientific judgement of the investigator or qualified designee.

Part 2: Number of Participants With Abnormal ECG Findings (Up to Day 450-Optional Follow-up)
Days 270, 360 and 450

ECGs were planned to be obtained after 5 minutes of rest in the semi-supine or supine position using ECG machine that automatically calculates the heart rate and measures PR, QRS, QT and QTcF intervals.

Part 1: Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)
Up to Day 60

An AE is any untoward medical occurrence in a clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Any untoward event resulting in death, life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, congenital anomaly/birth defect or any other situation according to medical or scientific judgment were categorized as SAE.

Part 2: Number of Participants With AEs and SAEs (Up to Day 169-Interim Analysis)
Up to Day 169

An AE is any untoward medical occurrence in a clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Any untoward event resulting in death, life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, congenital anomaly/birth defect or any other situation according to medical or scientific judgment were categorized as SAE.

Part 2: Number of Participants With AEs and SAEs (Up to Day 450-Optional Follow-up)
Up to Day 450

An AE is any untoward medical occurrence in a clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Any untoward event resulting in death, life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, congenital anomaly/birth defect or any other situation according to medical or scientific judgment were categorized as SAE.

Part 1: Area Under the Concentration-time Curve From Time Zero (Pre-dose) to the Time of the Last Quantifiable Concentration (AUC[0-t]) for GSK3389404
Day 1 (Pre-dose and at 0.5, 1, 1.5, 2, 3, 4, 6, 8 hours post-dose), Days 3, 8 and 30

Blood samples were collected to measure AUC(0-t) at indicated time-points. Pharmacokinetic parameters were determined using standard non-compartmental methods.

Part 2: AUC (0-t) for GSK3389404
Day 1 (Pre-dose and at 1, 2, 3, 4, 6, 8, 12, 24 hours post-dose), Days 29 and 57 (Pre-dose and at 1, 2, 3 hours post-dose), Day 169

Blood samples were collected to measure AUC(0-t) at indicated time-points. Pharmacokinetic parameters were determined using standard non-compartmental methods.

Part 1: Area Under the Plasma Concentration-time Curve From Time Zero (Pre-dose) Extrapolated to Infinite Time (AUC[0-infinity]) for GSK3389404
Day 1 (Pre-dose and at 0.5, 1, 1.5, 2, 3, 4, 6, 8 hours post-dose), Days 3, 8 and 30

Blood samples were collected to measure AUC (0-infinity) at indicated time-points. Pharmacokinetic parameters were determined using standard non-compartmental methods.

Part 2: AUC (0-infinity) for GSK3389404
Day 1 (Pre-dose and at 1, 2, 3, 4, 6, 8, 12, 24 hours post-dose), Days 29 and 57 (Pre-dose and at 1, 2, 3 hours post-dose), Day 169

Blood samples were collected to measure AUC (0-infinity) at indicated time-points. Pharmacokinetic parameters were determined using standard non-compartmental methods.

Part 1: Maximum Observed Plasma Concentration (Cmax) of GSK3389404
Day 1 (Pre-dose and at 0.5, 1, 1.5, 2, 3, 4, 6, 8 hours post-dose), Days 3, 8 and 30

Blood samples were collected to measure Cmax at indicated time-points. Pharmacokinetic parameters were determined using standard non-compartmental methods.

Part 2: Cmax of GSK3389404
Day 1 (Pre-dose and at 1, 2, 3, 4, 6, 8, 12, 24 hours post-dose), Days 29 and 57 (Pre-dose and at 1, 2, 3 hours post-dose), Day 169

Blood samples were collected to measure Cmax at indicated time-points. Pharmacokinetic parameters were determined using standard non-compartmental methods.

Part 1: Time to Achieve Cmax (Tmax) of GSK3389404
Day 1 (Pre-dose and at 0.5, 1, 1.5, 2, 3, 4, 6, 8 hours post-dose), Days 3, 8 and 30

Blood samples were collected to measure Tmax at indicated time-points. Pharmacokinetic parameters were determined using standard non-compartmental methods.

Part 2: Tmax of GSK3389404
Day 1 (Pre-dose and at 1, 2, 3, 4, 6, 8, 12, 24 hours post-dose), Days 29 and 57 (Pre-dose and at 1, 2, 3 hours post-dose), Day 169

Blood samples were collected to measure Tmax at indicated time-points. Pharmacokinetic parameters were determined using standard non-compartmental methods.

Part 1: Apparent Terminal Phase Half-life(t1/2) of GSK3389404
Day 1 (Pre-dose and at 0.5, 1, 1.5, 2, 3, 4, 6, 8 hours post-dose), Days 3, 8 and 30

Blood samples were collected to measure t1/2 at indicated time-points. Pharmacokinetic parameters were determined using standard non-compartmental methods.

Part 2: t1/2 of GSK3389404
Day 1 (Pre-dose and at 1, 2, 3, 4, 6, 8, 12, 24 hours post-dose), Days 29 and 57 (Pre-dose and at 1, 2, 3 hours post-dose), Day 169

Blood samples were collected to measure t1/2 at indicated time-points. Pharmacokinetic parameters were determined using standard non-compartmental methods.

Part 1: Apparent Subcutaneous Plasma Clearance (CL/F) of GSK3389404
Day 1 (Pre-dose and at 0.5, 1, 1.5, 2, 3, 4, 6, 8 hours post-dose), Days 3, 8 and 30

Blood samples were collected to measure CL/F at indicated time-points. Pharmacokinetic parameters were determined using standard non-compartmental methods.

Part 2: CL/F of GSK3389404
Day 1 (Pre-dose and at 1, 2, 3, 4, 6, 8, 12, 24 hours post-dose), Days 29 and 57 (Pre-dose and at 1, 2, 3 hours post-dose), Day 169

Blood samples were collected to measure CL/F at indicated time-points. Pharmacokinetic parameters were determined using standard non-compartmental methods.

Part 1: Number of Participants Achieving Response Rate (RR) Based on Reduction of Hepatitis B Surface Antigen (HBsAg) Level From Baseline
Up to Day 60

The RR was based on the proportion of participants with at least a 1.5 logarithm to the base 10 (log10) international units per milliliter (IU/mL) reduction of HBsAg levels from Baseline at any time up to Day 60. Number of participants who achieved \>1.5 log10 IU/mL decrease in HBsAg levels at any time up to Day 60 are presented.

Part 2: Number of Participants Achieving RR Based on Reduction of HBsAg Level From Baseline
Up to Day 85

The RR was based on the proportion of participants with at least a 1.5 log10 IU/mL reduction of HBsAg levels from Baseline at any time up to Day 85. Number of participants who achieved \>1.5 log10 IU/mL decrease in HBsAg levels at any time up to Day 85 are presented.

Number of Participants With Any Non-serious Adverse Event (AE); Any Serious AE (SAE); Any AEs Leading to Discontinuation of Study Treatment (AELD) in Part 1
Up to 62 days

An AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Any untoward event resulting in death, life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, congenital anomaly/birth defect, any other situation according to medical or scientific judgment that may not be immediately life-threatening or result in death or hospitalization but may jeopardize the participant or may require medical or surgical intervention or event associated with liver injury and impaired liver function were categorized as SAE. Participants who received any of the study treatment and had any AE or SAE or AELD were considered for analysis. Safety Population comprised of all participants who received at least 1 dose of study treatment.

Number of Participants With Any Non-serious AE; Any SAE; Any AELD in Part 2
Up to 115 days

An AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Any untoward event resulting in death, life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, congenital anomaly/birth defect, any other situation according to medical or scientific judgment that may not be immediately life-threatening or result in death or hospitalization but may jeopardize the participant or may require medical or surgical intervention or event associated with liver injury and impaired liver function were categorized as SAE. Participants who received any of the study treatment and had any AE or SAE or AELD were considered for analysis.

Number of Participants With Laboratory Values of Potential Clinical Importance in Part 1
Up to 62 days

Blood samples were collected for hematology, clinical chemistry, coagulation parameters and urinalysis. Abnormalities of potential clinical importance were evaluated as per Division of Acquired Immune Deficiency Syndrome \[DAIDS\] table for grading the severity of adult and pediatric adverse events. Laboratory abnormalities of DAIDS Grade 1 or higher were considered as of potential clinical importance and were summarized.

Number of Participants With Laboratory Values of Potential Clinical Importance in Part 2
Up to 115 days

Blood samples were collected for hematology, clinical chemistry, coagulation parameters and urinalysis. Abnormalities of potential clinical importance were evaluated as per DAIDS table for grading the severity of adult and pediatric adverse events. Laboratory abnormalities of DAIDS Grade 1 or higher were considered as of potential clinical importance and were summarized.

Change From Baseline in Complement Factor Component 3 (C3) and C4 Levels in Part 1
Day 1 (pre-dose) and up to 31 days

Blood samples were collected to evaluate complement factors (C3 and C4) levels. Latest pre-dose assessment at Day 1 was considered as Baseline value. Change from Baseline was calculated as difference between minimum level (lowest of the measurements for specimens collected) observed post-dose and pre-study drug administration.

Change From Baseline in Complement Split Product C5a Levels in Part 1
Day 1 (pre-dose) and up to 31 days

Blood samples were collected to evaluate complement split product C5a levels. Latest pre-dose assessment at Day 1 was considered as Baseline value. Change from Baseline was calculated as difference between maximum level (highest of the measurements for specimens collected) observed post-dose and pre-study drug administration.

Change From Baseline in Complement Split Product Bb Levels in Part 1
Day 1 (pre-dose) and up to 31 days

Blood samples were collected to evaluate complement split product Bb levels. Latest pre-dose assessment at Day 1 was considered as Baseline value. Change from Baseline was calculated as difference between maximum level (highest of the measurements for specimens collected) observed post-dose and pre-study drug administration

Change From Baseline in Complement Factor C3 and C4 Levels in Part 2
Day 1 (pre-dose) and Day 22

Blood samples were collected to evaluate complement factors (C3 and C4) levels. Latest pre-dose assessment at Day 1 or Day 22 was considered as Baseline value. Change from Baseline was calculated as difference between minimum level (lowest of the measurements for specimens collected each after Day 1 and Day 22 study drug administrations) observed post-dose and pre-study drug administration

Change From Baseline in Complement Factor C5a Levels in Part 2
Day 1 (pre-dose) and Day 22

Blood samples were collected to evaluate complement factors C5a levels. Latest pre-dose assessment at Day 1 or Day 22 was considered as Baseline value. Change from Baseline was calculated as difference between maximum level (lowest of the measurements for specimens collected each after Day 1 and Day 22 study drug administrations) observed post-dose and pre-study drug administration.

Change From Baseline in Complement Factor Bb Levels in Part 2
Day 1 (pre-dose) and Day 22

Blood samples were collected to evaluate complement factors C5a levels. Latest pre-dose assessment at Day 1 or Day 22 was considered as Baseline value. Change from Baseline was calculated as difference between maximum level (lowest of the measurements for specimens collected each after Day 1 and Day 22 study drug administrations) observed post-dose and pre-study drug administration.

Change From Baseline in Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) at the Indicated Time Points in Part 1
Day 1 (pre-dose) and up to 30 days

SBP and DBP were taken at Baseline (Day 1, pre-dose) and at 1, 2, 4, 8, 12, 24, 48 and 72 hour post dose; and on Days 8 and 30. Measurements were obtained after resting for at least 5 minutes in a semi-supine position. Baseline was defined as the last scheduled non-missing measurement taken prior to drug administration. Change from Baseline was calculated as value at indicated time point minus Baseline value.

Change From Baseline in Pulse Rate (PR) at the Indicated Time Points in Part 1
Day 1 (pre-dose) and up to 30 days

Pulse rate was taken at Baseline (Day 1, pre-dose) and at 1, 2, 4, 8, 12, 24, 48 and 72 hour post dose; and on Days 8 and 30. Measurements were obtained after resting for at least 5 minutes in a semi-supine position. Baseline was defined as the last scheduled non-missing measurement taken prior to drug administration. Change from Baseline was calculated as value at indicated time point minus Baseline value.

Change From Baseline in Respiratory Rate (RR) at the Indicated Time Points in Part 1
Day 1 (pre-dose) and up to 30 days

Respiratory rate was taken at Baseline (Day 1, pre-dose) and at 1, 2, 4, 8, 12, 24, 48 and 72 hour post dose; and on Days 8 and 30. Baseline was defined as the last scheduled non-missing measurement taken prior to drug administration. Change from Baseline was calculated as value at indicated time point minus Baseline value.

Change From Baseline in Body Temperature at the Indicated Time Points in Part 1
Day 1 (pre-dose) and up to 30 days

Temperature was taken at Baseline (Day 1, pre-dose) and at 1, 2, 4, 8, 12, 24, 48 and 72 hour post dose; and on Days 8 and 30. Baseline was defined as the last scheduled non-missing measurement taken prior to drug administration. Change from Baseline was calculated as value at indicated time point minus Baseline value.

Change From Baseline in SBP and DBP at the Indicated Time Points in Part 2
Day 1 (pre-dose) and up to 115 days

SBP and DBP were taken at Baseline (Day 1, pre-dose) and at 1, 2, 4, 6, 8, 12, 24, 48 and 72 hour post Day 1 dose; on Days 8 and 15; Day 22 (pre-dose) and at 1, 4, 6, 12, 24, 48 and 72 hours post Day 22 dose; on Days 29, 36, 50, 71 and at Follow-up visit (Day 113 +- 2 days). Measurements were obtained after resting for at least 5 minutes in a semi-supine position. Baseline was defined as the last scheduled non-missing measurement taken prior to drug administration. Change from Baseline was calculated as value at indicated time point minus Baseline value.

Change From Baseline in PR at the Indicated Time Points in Part 2
Day 1 (pre-dose) and up to 115 days

Pulse rate was taken at Baseline (Day 1, pre-dose) and at 1, 2, 4, 6, 8, 12, 24, 48 and 72 hour post Day 1 dose; on Days 8 and 15; Day 22 (pre-dose) and at 1, 4, 6, 12, 24, 48 and 72 hours post Day 22 dose; on Days 29, 36, 50, 71 and at Follow-up visit (Day 113+- 2 days). Measurements were obtained after resting for at least 5 minutes in a semi-supine position. Baseline was defined as the last scheduled non-missing measurement taken prior to drug administration. Change from Baseline was calculated as value at indicated time point minus Baseline value.

Change From Baseline in RR at the Indicated Time Points in Part 2
Day 1 (pre-dose) and up to 115 days

Respiratory rate was taken at Baseline (Day 1, pre-dose) and at 1, 2, 4, 6, 8, 12, 24, 48 and 72 hour post Day 1 dose; on Days 8 and 15; Day 22 (pre-dose) and at 1, 4, 6, 12, 24, 48 and 72 hours post Day 22 dose; on Days 29, 36, 50, 71 and at Follow-up visit (Day 113+- 2 days). Baseline was defined as the last scheduled non-missing measurement taken prior to drug administration. Change from Baseline was calculated as value at indicated time point minus Baseline value.

Change From Baseline in Body Temperature at the Indicated Time Points in Part 2
Day 1 (pre-dose) and up to 115 days

Body temperature was taken at Baseline (Day 1, pre-dose) and at 1, 2, 4, 6, 8, 12, 24, 48 and 72 hour post Day 1 dose; on Days 8 and 15; Day 22 (pre-dose) and at 1, 4, 6, 12, 24, 48 and 72 hours post Day 22 dose; on Days 29, 36, 50, 71 and at Follow-up visit (Day 113+- 2 days). Baseline was defined as the last scheduled non-missing measurement taken prior to drug administration. Change from Baseline was calculated as value at indicated time point minus Baseline value.

Number of Participants With 12-lead Electrocardiogram (ECG) Findings in Part 1
Day 1 (pre-dose) and up to 31 days

12-lead ECGs were recorded at Baseline (Day 1, pre-dose) and at 1, 4, 8, 12, 24 and 48 hour post dose; and on Days 8 and 30. Measurements were obtained after resting for at least 5 minutes in a supine position. Baseline was defined as the last scheduled non-missing measurement taken prior to drug administration. Change from Baseline was calculated as value at indicated time point minus Baseline value. Number of participants with worst change from Baseline in ECG have been presented as clinically significant (CS) change or not a clinically significant (NCS) change.

Area Under the Plasma Concentration Curve (AUC) From Time Zero to Infinity [AUC (0-inf)], AUC From Time Zero to the Time of Last Quantifiable Concentration [AUC(0-t)], AUC From Time Zero to 24 Hours [AUC(0-24)] of GSK3389404 After Single Dose in Part 1
Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 30 post-dose

Blood samples were collected to evaluate AUC (0-inf), AUC (0-t) and AUC (0-24) of GSK3389404 on Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 30 post-dose. Pharmacokinetic Concentration Population was defined as participants who underwent plasma PK sampling and had evaluable PK assay results post-dose.

Maximum Observed Concentration (Cmax), Observed Concentration at 24 Hours (C24) and at 168 Hours (C168) of GSK3389404 Following Single Dose in Part 1
Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 30 post-dose

Blood samples were collected to evaluate Cmax, C24 and C168 of GSK3389404 on Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 30 post-dose.

Time to Maximum Observed Concentration (Tmax), Terminal Half-life (T1/2) and Lag Time (Tlag) of GSK3389404 Following Single Dose in Part 1
Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 30 post-dose

Blood samples were collected to evaluate Tmax, T1/2 and Tlag of GSK3389404 on Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 30 post-dose.

Apparent SC Plasma Clearance (CL/F) of GSK3389404 Following Single Dose in Part 1
Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 30 post-dose

Blood samples were collected to evaluate CL/F of GSK3389404 on Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 30 post-dose.

AUC (0-t), AUC(0-24), AUC From Time Zero to 168 Hours Post-dose [AUC(0-168)] and AUC (0-inf) of GSK3389404 Following Single Dose on Day 1 of Part 2
Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 15 post-dose

Blood samples were collected to evaluate AUC (0-t), AUC (0-24), AUC (0-168) and AUC (0-inf) of GSK3389404 on Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 15 post-dose.

Cmax, C24 and C168 of GSK3389404 Following Single Dose on Day 1 of Part 2
Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 15 post-dose

Blood samples were collected to evaluate Cmax, C24 and C168 of GSK3389404 on Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 15 post-dose.

Tmax, T1/2 and Tlag of GSK3389404 Following Single Dose on Day 1 of Part 2
Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 15 post-dose

Blood samples were collected to evaluate Tmax, T1/2 and Tlag of GSK3389404 on Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 15 post-dose.

CL/F of GSK3389404 Following Single Dose on Day 1 of Part 2
Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 15 post-dose

Blood samples were collected to evaluate CL/F of GSK3389404 on Day 1 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 8 and 15 post-dose. Only those participants with data available at the specified time points were analyzed.

AUC(0-24) and AUC From Time Zero to the End of the Dosing Interval [AUC(0-tau)] of GSK3389404 Following Dosing on Day 22 of Part 2
Day 22 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 29, 36, 50, 71 and at Follow-up (Day 115)

Blood samples were collected to evaluate AUC (0-24) and AUC (0-tau) of GSK3389404 on Day 22 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 29, 36, 50, 71 and at Follow-up (Day 113+- 2 days ).

Observed Concentration at the End of the Dosing Interval (Ctau), C24 and Cmax of GSK3389404 Following Dosing on Day 22 of Part 2
Day 22 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 29, 36, 50, 71 and at Follow-up (Day 115)

Blood samples were collected to evaluate Ctau, C24 and Cmax of GSK3389404 on Day 22 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 29, 36, 50, 71 and at Follow-up (Day 113+- 2 days ).

Tmax, T1/2 and Tlag of GSK3389404 Following Dosing on Day 22 of Part 2
Day 22 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 29, 36, 50, 71 and at Follow-up (Day 115)

Blood samples were collected to evaluate Tmax, T1/2 and Tlag of GSK3389404 on Day 22 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 29, 36, 50, 71 and at Follow-up (Day 113+- 2 days).

Cl/F of GSK3389404 Following Dosing on Day 22 of Part 2
Day 22 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 29, 36, 50, 71 and at Follow-up (Day 115)

Blood samples were collected to evaluate Cl/F of GSK3389404 on Day 22 (pre-dose) and at 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 24, 48, 72 hours post-dose; and on Days 29, 36, 50, 71 and at Follow-up (Day 113+- 2 days).

Secondary Endpoints
Part 1: Change From Baseline in log10 Hepatitis B Virus (HBV) Deoxyribonucleic Acid (DNA) Viral Load in Plasma at Indicated Time Points
Baseline (Day 1 pre-dose), Day 1: 8 hours, Days 3, 8, 15, 22, 30 and 60
Part 2: Change From Baseline in log10 HBV DNA Viral Load in Plasma at Indicated Time Points (Up to Day 169-Interim Analysis)
Baseline (Day 1 pre-dose) and Up to Day 169
Part 2: Change From Baseline in log10 HBV DNA Viral Load in Plasma at Indicated Time Points (Up to Day 450-Optional Follow-up)
Baseline (Day 1 pre-dose) and Up to Day 450
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Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part 1, Cohort A : GSK3389404 30 mg SC or PlaceboEXPERIMENTALEnrolled subjects (HBeAg-positive and/or HBeAg negative) will receive single SC injection of GSK3389404 30 mg or matching placebo
Part 1, Cohort B: GSK3389404 60 mg SC or PlaceboEXPERIMENTALEnrolled subjects (HBeAg-positive and/or HBeAg negative) will receive single SC injection of GSK3389404 60 mg or matching placebo
Part 1, Cohort C: GSK3389404 120 mg SC or PlaceboEXPERIMENTALEnrolled subjects (HBeAg-positive and/or HBeAg negative) will receive single SC injection of GSK3389404 120 mg or matching placebo
Part 1, Cohort C1 (optional): GSK3389404 120 mg SC or PlaceboEXPERIMENTALEnrolled subjects (HBeAg-positive and/or HBeAg negative) will receive single SC injection of GSK3389404 120 mg or matching placebo
Part 1, Cohort D: GSK3389404 </= 240 mg SC or PlaceboEXPERIMENTALEnrolled subjects (HBeAg-positive and/or HBeAg negative) will receive single SC injection of GSK3389404 \<= 240 mg or matching placebo
Part 2: GSK3389404 or placebo SCEXPERIMENTALEnrolled subjects will receive different parallel dose level and regimens of GSK3389404 or placebo SC at dose determined in part 1. The treatments for Part 2 are 60 mg GSK3389404 weekly, 120 mg bi-weekly GSK3389404, 120 mg GSK3389404 weekly or placebo.
Part 1: GSK3389404 10 mgEXPERIMENTALSubjects will receive a single dose of GSK3389404 10 mg by subcutaneous injection on Day 1 of Part 1.
Part 1: PlaceboPLACEBO_COMPARATORSubjects will receive a single dose of subcutaneous (injection under the skin) injection of placebo matching with GSK3389404 10 milligram (mg) or 30 mg, or 60 mg or 120 mg.
Part 1: GSK3389404 30 mgEXPERIMENTALSubjects will receive a single dose of GSK3389404 30 mg by subcutaneous injection on Day 1 of Part 1.
Part 1: GSK3389404 60 mgEXPERIMENTALSubjects will receive a single dose of GSK3389404 60 mg by subcutaneous injection on Day 1 of Part 1.
Part 1: GSK3389404 120 mgEXPERIMENTALSubjects will receive a single dose of GSK3389404 120 mg by subcutaneous injection on Day 1 of Part 1.
Part 2: GSK3389404 30 mgEXPERIMENTALSubjects will receive a single dose of GSK3389404 30 mg by subcutaneous injection QW for 4 weeks in Part 2.
Part 2: PlaceboPLACEBO_COMPARATORSubjects will receive a single dose of subcutaneous injection of placebo matching with GSK3389404 30 mg or 60 mg or 120 mg once weekly (QW) for 4 weeks in Part 2.
Part 2: GSK3389404 60 mgEXPERIMENTALSubjects will receive a single dose of GSK3389404 60 mg by subcutaneous injection QW for 4 weeks in Part 2.
Part 2: GSK3389404 120 mgEXPERIMENTALSubjects will receive a single dose of GSK3389404 120 mg by subcutaneous injection QW for 4 weeks in Part 2.
Interventions
NameTypeDescription
GSK3389404DRUGGSK3389404 is available as Clear colorless to slightly yellow solution for injection.
PlaceboDRUGPlacebo is available as a Clear colorless solution.
Matching PlaceboDRUGPlacebo is supplied as solution for injection vial. It's physical appearance is clear colourless solution.
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Eligibility Criteria
Age Range18 Years — 70 Years
SexALL
Healthy VolunteersNo
Study Sites21

Inclusion Criteria: * Subject is able to understand and is capable of giving written informed consent, is willing to comply with protocol requirements, instructions and protocol-stated restrictions, and is likely to complete the study as planned. * Between 18 and 70 years of age, inclusive, at the ...

Countries:ChinaHong KongJapanPhilippinesSingaporeSouth KoreaUnited Kingdom
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