A Study to Assess Intrahepatic and Peripheral Changes of Immunologic and Virologic Markers in Chronic Hepatitis B Virus Infection

Percentage of participants with sustained (reduction) serum HBsAg response per Definition 2 at follow-up Week 48 were reported. Sustained serum HBsAg response per definition 2 was defined as: for participants with a >1 log decline in HBsAg from baseline at last follow up visit: Among the most recent three visits, the difference between log HBsAg at 2 of 3 last visit and 1 of 3 last visit is <0.2, and the difference between log HBsAg at 3 of 3 last visit and 1 of 3 last visit is <0.2.

Percentage of Participants who achieved HBsAg Seroclearance were reported. HBsAg seroclearance was defined as quantitative HBsAg <LLOQ (<0.05 IU/mL).

Percentage of Participants who achieved HBeAg Seroclearance were reported. HBeAg seroclearance was defined as (quantitative] HBeAg <LLOQ (<0.11 IU/mL); with HBeAg positive status at baseline and became HBeAg negative post-baseline.

Change from baseline in percentage of intrahepatic viral parameter: HBcAg positive hepatocytes at Week 40 were reported. The percentage of HBcAg positive hepatocytes were derived as number of HBcAg positive hepatocytes*100 per total number of evaluated hepatocytes.

Change from baseline in percentage of intrahepatic viral parameter: cccDNA positive hepatocytes were reported. The percentage of cccDNA-positive hepatocytes, were derived as number of cccDNA positive hepatocytes*100 per total number of evaluated hepatocytes.

Change from baseline in percentage of intrahepatic viral parameter: HBsAg positive hepatocytes at Week 40 were reported. The percentage of HBsAg positive hepatocytes were derived as number of HBsAg positive hepatocytes * 100 per total number of evaluated hepatocytes.

Change from baseline in percentage of intrahepatic viral Parameter: pgRNA positive hepatocytes at Week 40 were reported. The percentage of pgRNA-positive hepatocytes, were derived as number of pgRNA positive hepatocytes*100 per total number of evaluated hepatocytes.

Change from baseline in transcriptional activity (ratio of pgRNA/cccDNA) at Week 40 were reported.

Change from baseline in percentage of intrahepatic viral parameter: silent infected hepatocytes (that is infected hepatocytes without HBV transcription; cccDNA-positive/HBV RNA-negative hepatocytes) at Week 40 were reported. The percentage of silent infected hepatocytes (SIH), were derived as number of silent infected hepatocytes*100 per total number of evaluated hepatocytes.

Percentage of participants with HBsAg seroclearance (defined as HBsAg < LLOQ: 0.05 IU/mL) at Week 72 without restarting NA treatment were reported.

Percentage of participants with sustained (reduction) serum HBsAg response per Definition 1 at follow-up Week 48 were reported. Sustained serum HBsAg response per definition 1 was defined as: for participants with data for last follow-up visit (Follow-up Week 48 for participants who did not receive PegIFN-alpha2a or received PegIFN-alpha2a and did not meet NA completion criteria, and last Follow-up visit for participants who received PegIFN-alpha2a and stopped NA during Follow-up): participants who had a >1 log decline in HBsAg response at last scheduled follow-up visit and had an HBsAg <1000 IU/mL at last scheduled follow-up visit, or for participants without data at last follow-up visit: HBsAg values had a >2 log decline at second most recent visit or >1.5 log decline at latest visit (most recent value used) compared to baseline and had an HBsAg <1000 IU/mL at last available timepoint.

Percentage of participants with sustained (reduction) serum HBsAg response per Definition 3 at follow-up Week 48 were reported. Sustained serum HBsAg response per definition 3 for participants with a >1 log decline in HBsAg from baseline at last follow up visit: Among the most recent three visits, the difference between log HBsAg at 2 of 3 last visit and 1 of 3 last visit is <0.2, and the difference between log HBsAg at 3 of 3 last visit and 1 of 3 last visit is <0.2 and have an HBsAg <1000 IU/mL at the last available timepoint.

Percentage of participants with sustained (reduction) serum HBsAg response per definition 4 follow-up Week 48 were reported. Sustained serum HBsAg response per definition 4 were classified into 3 categories with respect to the difference between HBsAg level at the last Follow-up timepoint and end of treatment: Increase: >+0.2 log10 IU/mL , stable: within plus or minus (+/-) 0.2 log10 IU/mL, and decrease: >-0.2 log10 IU/mL.

Seroconversion of HBsAg was defined as having achieved HBsAg seroclearance (defined as quantitative HBsAg <LLOQ [<0.05 IU/mL]) and appearance of anti-HBs antibodies (defined as a baseline anti-HBs antibodies [quantitative] <LLOQ [<5 milli-international units per milliliter {mIU/mL}] and a post-baseline assessment >=LLOQ [>=5 mIU/mL]).

Percentage of participants who achieved HBeAg seroconversion were reported. Seroconversion of HBeAg was defined as having achieved HBeAg seroclearance (defined as [quantitative] HBeAg <LLOQ [<0.11 IU/mL]; with HBeAg positive status at baseline and became HBeAg negative post-baseline) together with appearance of anti-HBe antibodies (defined as a baseline anti-HBe antibodies [qualitative] with a "negative" result and a post-baseline assessment with "positive" result).

Virologic flare (VF) per derivation 1 was defined only for participants who were off-treatment (period after stopping all study drugs, including NA) and who had HBV DNA<LLOQ (<20 IU/mL) at last observed point on-treatment [OT]); start date of confirmed VF was first date of 2 consecutive visits with HBV DNA >200 IU/mL. End date of same confirmed VF was first date when HBV DNA value returns to <=200 IU/mL or date of NA restart, whichever comes first. Each virologic flare were categorized based on confirmed (that is, 2 consecutive values) peak HBV DNA above any of 3 thresholds within the start and end date of that flare as followed: 20,000 IU/mL, 2,000 IU/mL, and 200 IU/mL. Participants were counted only once for any given flare, regardless of the number of times they actually experienced the flare.

Off-treatment (time period after stopping all study drugs [including NA]) biochemical flare was defined as first date of 2 consecutive visits with ALT and/or AST >=3*ULN and >=3*nadir (lowest value observed up to start of flare) while participant received no study drugs. End date of same off-treatment biochemical flare was defined as first date with 50 percentage (%) reduction from peak ALT and/or AST level \& <3*ULN. On-treatment (time period during which the participant received any of study drugs) biochemical flare was defined as first date of 2 consecutive visits with ALT and/or AST >=3*ULN and >=3*nadir (lowest value observed up to start of flare) while participant was on-treatment. End date of same on-treatment biochemical flare was defined as first date with a 50% reduction from the peak ALT and/or AST level and <3*ULN, regardless of stopping study drugs. Participants were counted only once for any given flare, regardless of the number of times they actually experienced flare.

Percentage of participants with off-treatment clinical flares were reported. Clinical flares occurred either when a virologic flare and biochemical flare overlapped in time or when a biochemical flare started within 4 weeks following the end of a virologic flare. Off-treatment was defined as the time period after stopping all study drugs (including NA). The start date of a clinical flare was the minimum start date of the virologic flare and biochemical flare. The end date of a clinical flare was the maximum end date of the virologic flare and biochemical flare, that is, the later date between HBV DNA returned to <=200 IU/mL (or <=1 log10) and 50 %reduction from the peak ALT and/or AST level and <3*ULN reached during the biochemical flare. Participants were counted only once for any given flare, regardless of the number of times they actually experienced the flare.

Time to first occurrence of HBsAg seroclearance (defined as quantitative HBsAg <LLOQ [<0.05 IU/mL]) were reported. Time to first occurrence of HBsAg seroclearance was defined as the number of days between the date of first study intervention intake and the date of the first occurrence of the HBsAg seroclearance. Participants who withdrew early from the study before achieving HBsAg seroclearance or who did not achieve HBsAg seroclearance were censored at the last available HBsAg assessment. Kaplan-Meier method was used for the estimation.

Percentage of participants with virologic breakthrough on treatment were reported. Virological breakthrough was defined as having a confirmed on-treatment HBV DNA increase by >1 log10 IU/mL from nadir level (lowest level reached during treatment) in participants who did not have on-treatment HBV DNA level < LLOQ (<20 IU/mL) or confirmed on-treatment HBV DNA level >200 IU/mL in participants who had on-treatment HBV DNA level <LLOQ (<20 IU/mL) of the HBV DNA assay. Confirmed HBV DNA increase/level means that the criterion should be fulfilled at 2 or more consecutive time points or at the last observed on-treatment time point. On treatment was defined as the time period in which the participant received any of the study interventions (JNJ-3989 and/or JNJ 6379 and/or NA and/or PegIFN-alpha2a).

Percentage of participants with TEAES (including serious and non-serious) and TESAEs were reported. An AE was any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the intervention. Any AE occurring at or after the initial administration of study intervention was considered to be treatment emergent. A SAE is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly.

Number of participants with HBV-specific peripheral blood T-cell responses were reported. HBV-specific T-cells were characterized in peripheral blood mononuclear cell immune analysis by binding assays (multimer staining) combined with downstream T-cell responses and transcriptome profiling.

Clinical laboratory test parameters were Hematology : absolute neutrophil count (ANC); Chemistry : alanine aminotransferase (ALT) and serum glutamic pyruvic transaminase (SGPT), aspartate aminotransferase(AST) or serum glutamic oxaloacetic transaminase (SGOT), amylase (pancreatic and total), creatinine Kinase, creatinine, low-density lipoprotein (LDL), lipase, estimated glomerular filtration rate (eGFR) on serum creatinine (Cr). DAIDS toxicity grades were Grade 1 (Mild), Grade 2 (Moderate), Grade 3 (Severe), Grade 4 (Potentially Life-Threatening). Percentage of participants with treatment-emergent DAIDS toxicity Grade 3 or 4 were reported in this outcome measure. For toxicity grades, treatment-emergent was concluded if the postbaseline grade was worse than the baseline grade. Only those abnormality categories in which at least one participant had data were reported.

ECG parameters included ECG mean heart rate (HR)(beats per minute[bpm]), Pulse rate (PR) interval (milliseconds [ms]), QRS duration (ms) and QTc Corrected (Fridericia's formula QTcF). Abnormalities were graded as follows: ECG mean heart rate (abnormally low HR <45 bpm) and (abnormally high HR>=120 bpm); PR interval (abnormally high >220 ms) and QPRS (abnormally high >=120 ms); OT interval corrected for heart rate according to Fridericia (QTcF); borderline prolonged (BRD Pr )QTc (>=450 to <=480 ms), prolonged QTc (>=480 to <=500 ms)and pathologically prolonged QTc (>500 ms). For worst abnormality, treatment-emergent was concluded if the abnormality worsened as compared to the abnormality at baseline: abnormally high to abnormally low and vice-versa. Only those abnormality categories in which at least one participant had data were reported.

Percentage of participants with worst treatment-emergent DAIDS toxicity grade in vital signs were reported. Abnormality grades were: pulse rate (abnormally low <=45 bpm) and (abnormally high >=120 bpm). An assessment was treatment-emergent if abnormality worsened as compared to the abnormality at baseline: from abnormally high to abnormally low and vice-versa. Only the category (pulse rate) in which at least one participant had data were reported.

Number of participants with clinically significant treatment-emergent abnormalities in physical examination were reported. Physical examination included head/neck/thyroid, eyes/ears/nose/throat, respiratory, cardiovascular, lymph nodes, abdomen, skin, musculoskeletal, and neurological examinations.

Plasma trough concentration (C[0hour]) of JNJ-73763989 (JNJ-73763976, JNJ-73763924) were reported. C0h was the pre-dose plasma concentration of the JNJ-73763989 (JNJ-73763976, JNJ-73763924). Non-compartmental analysis were conducted to analyze plasma concentration of JNJ-73763989 and its molecules.

Maximum observed plasma concentration (Cmax) of JNJ-73763989 (JNJ-73763976, JNJ-73763924) were reported. Non-compartmental analysis were conducted to analyze Cmax JNJ-73763989 and its molecules.

Maximum observed plasma concentration (Cmax) of JNJ-73763989 (JNJ-73763976, JNJ-73763924) were reported. Non-compartmental analysis were conducted to analyze Cmax JNJ-73763989 and its molecules.

Minimum observed plasma concentration (Cmin) of JNJ-73763989 (JNJ-73763976, JNJ-73763924) were reported. Non-compartmental analysis were conducted to analyze Cmin of JNJ-73763989 and its molecules

Time to reach the maximum observed plasma concentration (tmax) of JNJ-73763989 (JNJ-73763976, JNJ-73763924) were reported. Non-compartmental analysis were conducted to analyze tmax of JNJ-73763989 and its molecules.

Time to reach the maximum observed plasma concentration (tmax) of JNJ-73763989 (JNJ-73763976, JNJ-73763924) were reported. Non-compartmental analysis were conducted to analyze tmax of JNJ-73763989 and its molecules.

Area under the plasma concentration-time curve from time zero to 24hours (AUC0 to 24h) of JNJ-73763989 (JNJ-73763976, JNJ-73763924) were reported. Non-compartmental analysis were conducted to analyze AUC0 to 24h of JNJ-73763989 and its molecules.

Area under the plasma concentration-time curve from time zero to 24hours (AUC0 to 24h) of JNJ-73763989 (JNJ-73763976, JNJ-73763924) were reported. Non-compartmental analysis were conducted to analyze AUC0 to 24h of JNJ-73763989 and its molecules.