A Study on the Pursuit of Sustained Clearance of HBsAg in Chronic Hepatitis B(CHB) Patients With Previous Interferon Treatment Using Pegylated Interferon Alpha

Inclusion criteria

• • Voluntary participation and ability to understand and provide written informed consent.

• Age 18-65 years (inclusive), either gender.
• Documented HBsAg positivity for at least 6 months, or other evidence confirming chronic hepatitis B (CHB).
• Prior interferon therapy before enrollment (treatment discontinuation ≥ 3 months), with HBsAg level at the end of prior treatment reduced by ≥ 50% from baseline.
• HBsAg ≤ 500 IU/mL at screening, and HBsAg rebound at screening not exceeding 50% of the baseline HBsAg level during the first-round interferon therapy.
• Negative pregnancy test within 24 hours prior to the first dose (for women of childbearing potential); all subjects (male and female) must use effective contraceptive measures during the study.

Exclusion criteria

• • Pregnant or lactating women, or subjects with a pregnancy plan during the study period.

• Subjects with neuropsychiatric disorders, in particular a history of depression, anxiety, mania, schizophrenia, or a family history of psychiatric disorders (especially a history of depression or depressive tendency).
• Concurrent active infection with hepatitis A, hepatitis C, hepatitis E and/or HIV, or chronic liver disease due to other causes (e.g., alcoholic hepatitis, drug-induced liver injury, autoimmune liver disease, etc.).
• Evidence of acute severe liver damage: e.g., ALT > 10 × ULN, or marked ALT elevation accompanied by significant hyperbilirubinemia.
• Evidence of decompensated liver disease: e.g., ascites, esophagogastric variceal bleeding, sepsis, hepatic encephalopathy, hepatorenal syndrome, etc.; or prior evidence of decompensated cirrhosis.
• Evidence of hepatocellular carcinoma (HCC), or AFP > 1 × ULN.
• Renal diseases: acute or chronic nephritis, renal insufficiency, nephrotic syndrome, etc.; or serum creatinine > 1 × ULN at screening.
• Neutrophil count < 1.5 × 10⁹/L, platelet count < 90 × 10⁹/L, or serum phosphorus < 0.8 mmol/L during the screening period.
• Autoimmune diseases (e.g., psoriasis, systemic lupus erythematosus, etc.), endocrine disorders (e.g., thyroid diseases, diabetes, etc.), hypertension poorly controlled by prescription medications (blood pressure ≥ 140/90 mmHg), a history of severe heart disease (especially poorly controlled within 6 months), severe retinopathy or other serious ophthalmologic diseases, or other organic lesions or dysfunction of vital organs.
• Subjects planning to undergo or having previously undergone organ transplantation.
• Subjects with hypersensitivity to the investigational product or its excipients, or meeting any contraindication listed in the prescribing information of the investigational product.
• Other conditions deemed inappropriate for enrollment by the investigator