The purpose of this study is to evaluate efficacy of the study intervention, based on hepatitis B surface antigen (HBsAg) levels at follow-up (FU) Week 24.
JNJ-73763989 (JNJ-3989) is a small interfering ribonucleic acid (siRNA) targeting all hepatitis B virus (HBV) messenger ribonucleic acid (mRNAs). The programmed cell death protein receptor-1 (PD-1) inhibitor aims at preventing the interaction of PD-1 with its ligands. The purpose of this study to determine whether at least one of the combination regimens of JNJ-3989 + PD-1 inhibitor + Nucleos(t)ide analog (NA) is more efficacious than JNJ-3989 + NA treatment. This study will be conducted in 3 periods: screening period, treatment period and follow-up (FU) period. Safety assessments will include adverse events (AEs), serious AEs, clinical safety laboratory tests, electrocardiograms (ECGs), vital signs, and physical examinations. Total duration of individual participation will be up to 78 weeks (including screening period).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
37
JNJ-73763989 will be administered subcutaneously.
PD-1 inhibitor will be administered as IV infusion.
Tenofovir disoproxil film-coated tablets will be administered orally.
Toronto General Hospital
Toronto, Ontario, Canada
Percentage of Participants Who Achieved Hepatitis B Surface Antigen (HBsAg) Seroclearance at Follow-up (FU) Week 24
Percentage of participants who achieved HBsAg seroclearance at FU Week 24 were reported. Seroclearance of HBsAg was defined as a (quantitative) HBsAg level less than (\<) lower limit of quantification (LLOQ) (0.05 international unit per milliliters \[IU/mL\]).
Time frame: At FU Week 24
Percentage of Participants Who Experienced Treatment-emergent Adverse Events (TEAEs) of Special Interest
An AE was any untoward medical occurrence in a participant participating in a clinical study that does not necessarily had a causal relationship with the pharmaceutical/biological agent under study. Any AE occurring at or after the initial administration of study intervention was considered to be treatment emergent. AEs of interest were significant AEs that are judged to be of special interest because of clinical importance, known class effects or based on nonclinical signals.
Time frame: IP: Week 0 up to Week 24; FU Phase: FU Week 1 up to FU Week 48
Number of Participants With TEAEs by Severity
Number of participants with TEAEs by severity were reported. An AE was any untoward medical occurrence in a participant participating in a clinical study that did not necessarily had a causal relationship with the pharmaceutical/biological agent under study. Any AE occurring at or after the initial administration of study intervention was considered to be treatment emergent. Severity of AE were graded by using Division of Acquired Immunodeficiency Syndrome (DAIDS) grading scale that ranges from Grade 1 to Grade 5. Grade 1 indicates a mild event, Grade 2 indicates a moderate event, Grade 3 indicates a severe event, Grade 4 indicated a potentially life-threatening event, Grade 5 indicated death.
Time frame: IP: Week 0 up to Week 24; FU Phase: FU Week 1 up to FU Week 48
Number of Participants With Immune Related TEAEs
Number of participants with immune related TEAEs were reported. An AE was any untoward medical occurrence in a participant participating in a clinical study that did not necessarily have a causal relationship with the pharmaceutical/ biological agent under study. Any AE occurring at or after the initial administration of study intervention was considered to be treatment emergent. Immune-related AEs (irAEs) were alanine aminotransferase/alanine aminotransferase (ALT/AST) elevations including immune-related hepatic AEs, infusion-related reaction (IRRs) and other irAEs (including gastrointestinal AEs, neurological AEs, pulmonary AEs, renal AEs, endocrinopathies, rash, uveitis and visual complaints, lipase/amylase elevations, and infection), hematological abnormalities and injection site reactions.
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TAF film-coated tablets will be administered orally.
ETV film-coated tablets will be administered orally.
Fakultni nemocnice Hradec Kralove
Hradec Králové, Czechia
IKEM
Prague, Czechia
Hopital Beaujon
Clichy, France
Hopital Saint Joseph
Marseille, France
Chu Rennes Hopital Pontchaillou
Rennes, France
CHRU Nancy Brabois
Vandœuvre-lès-Nancy, France
Fondazione IRCCS Ca Granda Ospedale Policlinico Di Milano
Milan, Italy
Azienda Ospedaliero Universitaria Pisana
Pisa, Italy
Universita degli Studi di Roma 'La Sapienza' - Umberto I Policlinico di Roma
Rome, Italy
...and 16 more locations
Time frame: IP: Week 0 up to Week 24; FU Phase: FU Week 1 up to FU Week 48
Number of Participants With Abnormalities in Vital Signs
Number of participants with abnormalities in vital signs measurements (including pulse rate: abnormally low: less than or equal to \[\<=\] 45 beats per minute \[bpm\], abnormally high: greater than or equal to \[\>=\] 120 bpm; diastolic blood pressure \[BP\]: abnormally low: \<=50 millimeters of mercury \[mmHg\], mild: \>90 to \<100 mmHg, moderate: \>=100 to \<110 mmHg, and severe: \>=110 mmHg; systolic BP: abnormally low: \<=90 mmHg, mild: \>140 to \<160 mmHg, moderate: \>=160 to \<180 mmHg, and severe: \>=180 mmHg) were reported.
Time frame: IP: Week 0 up to Week 24; FU Phase: FU Week 1 up to FU Week 48
Number of Participants With Abnormalities in 12-lead Electrocardiogram (ECGs)
Number of participants with abnormalities in 12-lead ECGs: heart rate (abnormally low: \<45 beats per minute \[bpm\], abnormally high: greater than or equal \[\>=\] 120 bpm), PR interval (abnormally high: greater than \[\>\] 220 millisecond \[msec\]), QRS interval (abnormally high: \>=120 msec), QTc interval Fridericia (Borderline prolonged QT: 450\< QTc \<=480 msec; Prolonged QT: 480 \< QTc \<=500; Pathologically prolonged QT: QTc \>500) were reported.
Time frame: IP: Week 0 up to Week 24; FU Phase: FU Week 1 up to FU Week 48
Number of Participants With Abnormalities in Physical Examinations
Number of participants with abnormalities in physical examinations were reported.
Time frame: IP: Week 0 up to Week 24; FU Phase: FU Week 1 up to FU Week 48
Percentage of Participants With Abnormalities in Clinical Laboratory Parameters: Hematology
Percentage of participants with abnormalities in hematology parameters (including basophils/Leukocytes high, erythrocytes mean corpuscular volume high, erythrocytes high and low, lymphocytes/leukocytes high and low, monocytes/leukocytes high and low, neutrophils, segmented+band form high and low, reticulocytes/erythrocytes high and low, basophils/leukocytes, eosinophils/leukocytes high, erythrocyte mean corpuscular hemoglobin low, reticulocytes/erythrocytes high and low, lymphocytes atypical/leukocytes high, lymphocytes atypical high, hematocrit high, monocytes low and high) were reported. Abnormalities with at least 1 participant is included. Low and high categorization depend on investigator's discretion.
Time frame: IP: Week 0 up to Week 24; FU Phase: FU Week 1 up to FU Week 48
Number of Participants With Abnormalities in Clinical Laboratory Parameters: Clinical Chemistry
Number of participants with abnormalities in clinical chemistry parameters (including C reactive protein high, cystatin C low and high, gamma glutamyl transferase low, high density lipoprotein \[HDL\] cholesterol low and high, indirect bilirubin high, lactate dehydrogenase high, protein high, thyrotropin low and high, free thyroxine high, free triiodothyronine low and high, and urea nitrogen high) were reported. Abnormalities with at least 1 participant is included. Low and high categorization depend on investigator's discretion.
Time frame: IP: Week 0 up to Week 24; FU Phase: FU Week 1 up to FU Week 48
Number of Participants With Abnormalities in Clinical Laboratory Parameters: Urinalysis
Number of participants with abnormalities in clinical laboratory parameters (including specific gravity high and urine hyaline casts high) were reported. Abnormalities with at least 1 participant is included. Low and high categorization depend on investigator's discretion.
Time frame: IP: Week 0 up to Week 24; FU Phase: FU Week 1 up to FU Week 48
Change From Baseline in Hepatitis B Surface Antigen (HBsAg) Levels
Change from baseline in HBsAg levels were reported. International units per milliliters=IU/mL. End of Study Intervention (EOSI) was the last post-baseline visit in study intervention period. End of study (EOS) was the last visit in the study.
Time frame: IP: Baseline, Weeks 1, 2, 3, 4, 8, 12, 16, 20, and End of Study Intervention (EOSI; Week 24); FU Phase: FU Weeks 4, 8, 12, 16, 20, 24, 32, 40, 48, and EOS (last visit at FU Week 48)
Percentage of Participants With Change in HBsAg Levels Below/Above Different Cut-offs Over Time
Percentage of participants with change in HBsAg levels below/above different cut-offs (\<0.05 IU/mL, \<1 U/mL, \<10 IU/mL, \<100 IU/mL , \<1000 IU/mL) over time were reported. EOSI was the last post-baseline visit in study intervention period. EOS was the last visit in the study.
Time frame: IP: Baseline, Weeks 1, 2, 3, 4, 8, 12, 16, 20, and EOSI (Week 24); FU Phase: FU Weeks 4, 8, 12, 16, 20, 24, 32, 40, 48, and EOS (last visit at FU Week 48)
Percentage of Participants With HBsAg Seroclearance
Percentage of participants with HBsAg seroclearance were reported. Seroclearance of HBsAg was defined as a HBsAg level \<lower limit of quantification (LLOQ) (0.05 IU/mL).
Time frame: IP: Week 0 to Week 24; FU Phase: FU Week 1 up to FU Week 48
Percentage of Participants With HBsAg Seroconversion
Percentage of participants with HBsAg seroconversion were reported. Seroconversion of HBsAg was defined as having achieved HBsAg seroclearance and appearance of anti-HBs antibodies (baseline anti-HBs antibodies \<LLOQ and a post-baseline assessment \>=LLOQ).
Time frame: IP: Week 0 to Week 24; FU Phase: FU Week 1 up to FU Week 48
Time to Achieve HBsAg Seroclearance
Time to achieve HBsAg seroclearance was reported. Seroclearance of HBsAg was defined as a (quantitative) HBsAg level \<LLOQ (0.05 IU/mL).
Time frame: Week 0 up to FU Week 48 (up to Week 72)
Time to Achieve HBsAg Seroconversion
Time to achieve HBsAg seroconversion were reported. Seroconversion of HBsAg was defined as having achieved HBsAg seroclearance and appearance of anti-HBs antibodies (baseline anti-HBs antibodies \<LLOQ and a post-baseline assessment \>=LLOQ).
Time frame: Week 0 up to FU Week 48 (up to Week 72)
Hepatitis B Virus (HBV) Deoxyribonucleic Acid (DNA) Levels Over Time
HBV DNA levels over time were reported. EOSI was the last post-baseline visit in study intervention period. EOS was the last visit in the study.
Time frame: IP: Baseline, Weeks 2, 4, 8, 12, 16, 20 and EOSI (Week 24); FU Phase: FU Weeks 4, 8, 12, 16, 20, 24, 32, 40, 48, and EOS (last visit at FU Week 48)
Percentage of Participants With Hepatitis B Virus Deoxyribonucleic Acid (HBV DNA) Level Below/Above Different Cut-offs Over Time
Percentage of participants with HBV DNA level below/above different cut-offs over time were reported. HBV DNA cut offs: \<LLOQ target detected (TD): that is, traces of HBV DNA were detected/found but were too low to be quantified; \<LLOQ target not detected (TND): that is, no traces of HBV DNA were detected/found. EOSI was the last post-baseline visit in study intervention period. EOS was the last visit in the study. The LLOQ for HBV DNA was 20 IU/mL. As indicated in the data table, the sum of percentage values of each sub-categories within the specific timepoints "IP: Week 2" and "FU Phase: Week 4", shows a slight deviation from 100% due to rounding.
Time frame: IP: Baseline, Weeks 2, 4, 8, 12, 16, 20, and EOSI (Week 24); FU Phase: FU Weeks 4, 8, 12, 16, 20, 24, 32, 40, 48, and EOS (last visit at FU Week 48)
Percentage of Participants With Hepatitis B e Antigen (HBeAg) Level Below/Above Different Cut-offs Over Time
Percentage of participants with HBeAg level below/above different cut-offs over time were reported. HBeAg cut-offs: \<LLOQ (0.11 IU/mL). EOSI was the last post-baseline visit in study intervention period. EOS was the last visit in the study.
Time frame: IP: Baseline, Weeks 2, 4, 8, 12, 20, and EOSI (Week 24); FU Phase: FU Weeks 12, 16, 20, 24, 32, 40, 48, and EOS (last visit at FU Week 48)
Percentage of Participants With Virologic Breakthrough
Percentage of participants with virologic breakthrough (confirmed on-treatment HBV DNA increase by \>1 log10 IU/mL from nadir in participants who did not have on-treatment HBV DNA level below LLOQ or a confirmed on-treatment HBV DNA level \>200 IU/mL in participants who had on-treatment HBV DNA level below LLOQ) were reported.
Time frame: IP: Week 0 to Week 24; FU Phase: FU Week 1 up to FU Week 48