Health Condition 1: D50-D89- Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
Conditions
Interventions
1.0 mL nominal volume per vial
(minimal overfill per vial)
24 weeks-treatment duration
Control Intervention1: Placebo: Locally sourced normal
saline
Sponsors
GSK Research & Development Limited
Eligibility
Inclusion criteria
Inclusion criteria: Age: At least 18 years of age at the time of signing the informed consent. Type of Participant and Disease Characteristics: Participants must be HBeAg-negative at screening. Participants who have documented chronic HBV infection more than equal to 6 months prior to Screening AND Currently receiving stable NA therapy defined as no changes to their NA regimen from at least 6 months prior to Screening and with no planned changes to the stable regimen over the duration of the study. Plasma or serum HBsAg concentration >100 IU/mL, but no greater than 3000 IU/mL Plasma or serum HBV DNA concentration must be adequately suppressed, defined as plasma or serum HBV DNA Alanine aminotransferase (ALT) �2 x ULN Participants who are willing and able to cease their NA treatment in accordance with the protocol. Sex and Contraceptive/Barrier Requirements A female participant is eligible to participate if she is not pregnant or breastfeeding, and 1 of the following conditions applies: 1 Is a woman of non-childbearing potential (WONCBP) as defined in Section 10.4 OR Is a WOCBP and using a contraceptive method (for a period of 28 days prior to enrollment [first dose of study drug]) that is highly effective (with a failure rate of A WOCBP must have a negative highly sensitive pregnancy test (urine or serum as required by local regulations) within 24 hours before the first dose of study intervention If a urine test cannot be confirmed as negative (e.g., an ambiguous result), a serum pregnancy test is required. In such cases, the participant must be excluded from participation if the serum pregnancy result is positive. The investigator is responsible for review of medical history, menstrual history, and recent sexual activity to decrease the risk for inclusion of a woman with an early undetected pregnancy. Informed Consent: Capable of giving signed informed consent which includes compliance with the requirements and restrictions listed in the ICF and in this protocol.
Exclusion criteria
Exclusion criteria: Medical Conditions 1 Clinically significant abnormalities, aside from chronic HBV infection in medical history (e.g., moderate-severe liver disease other than chronic HBV, acute coronary syndrome within 6 months of screening, major surgery within 3 months of screening, significant/unstable cardiac disease, uncontrolled diabetes, bleeding diathesis or coagulopathy) or physical examination Co-infection with: a. Current history of Hepatitis C infection or participants that have been cured for b. Human immunodeficiency virus (HIV) c. Hepatitis D virus 3 History of or suspected liver cirrhosis and/or evidence of cirrhosis as determined by a. Both APRI >2 and FibroSure/FibroTest result >0.7 � If only 1 parameter (APRI or FibroSure/FibroTest) result is positive, a discussion with the Medical Monitor is required before inclusion in study is permitted b Regardless of APRI of Fibrosure/FibroTest score, if the participant meets 1 of the following criteria documented from their medical history, they will be excluded from the study Liver biopsy (i.e., Metavir Score F4) � Liver stiffness >12 kPa 4 Diagnosed or suspected hepatocellular carcinoma as evidenced by the following a. Alpha-fetoprotein concentration �200 ng/mL b. If the screening alpha fetoprotein concentration is �50 ng/mL and the absence of liver mass must be documented by imaging within 6 months before randomization 5. History of malignancy within the past 5 years with the exception of specific cancers that are cured by surgical resection (e.g., skin cancer). Participants under evaluation for possible malignancy are not eligible. 6. History of vasculitis or presence of symptoms and signs of potential vasculitis (e.g., vasculitic rash, skin ulceration, repeated blood detected in urine without identified cause) or history/presence of other diseases that may be associated with vasculitis condition (e.g., systemic lupus erythematosus, rheumatoid arthritis, relapsing polychondritis, mononeuritis multiplex) 7. History of extrahepatic disorders possibly related to HBV immune conditions (e.g., nephrotic syndrome, any type of glomerulonephritis, polyarteritis nodosa, cryoglobulinemia, uncontrolled hypertension) 8. History of alcohol or drug abuse/dependence a. Current alcohol use as judged by investigator to potentially interfere with participant compliance b. History of or current drug abuse/dependence as judged by the investigator to potentially interfere with participant compliance i. Refers to illicit drugs and substances with abuse potential. Medications that are used by the participant as directed, whether over-the-counter or through prescription, are acceptable and would not meet the exclusion criteria Prior/Concomitant Therapy: 9 Currently taking, or took within 3 months of screening, any immunosuppressing drugs (e.g., prednisone), other than a short course of therapy (�2 weeks) or topical/inhaled steroid use. 10. Participants to whom immunosuppressive treatment, including therapeutic doses of steroids is contraindicated, should not be considered for enrolment in the st
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The number of participants who achieved FC after discontinuation of all chronic HBV treatment (bepirovirsen/placebo and NA) in the absence of rescue medication will be reported. The FC for HBV is defined as Sustained suppression (24 weeks or longer) of HBV DNA (LLOQ) off all HBV treatment with HBsAg loss (0.05 IU/mL) with or without HBsAb after a finite duration of therapy.Timepoint: Upto 72 Weeks | — |
Secondary
| Measure | Time frame |
|---|---|
| Number of participants achieving FC with baseline HBsAg ââ?°Â¤3000 IU/mL. Timepoint: Upto 72 weeks;Number of participants achieving sustained suppression of HBV DNA (LLOQ) with baseline HBsAg ââ?°Â¤1000 IU/mLTimepoint: Upto 72 weeks | — |
Countries
Argentina, Brazil, Bulgaria, Canada, China, France, Germany, Greece, Hong Kong, Hungary, Italy, Japan, Mexico, Panama, Poland, Republic of Korea, Romania, Singapore, Spain, Taiwan, Thailand, Turkey, United Kingdom, United States of America
Contacts
Public ContactSwapnali Raut
GlaxoSmithKline Pharmaceuticals Limited
Outcome results
None listed