A Single and Repeated Dose Escalation of RBD1016 in Subjects with Chronic Hepatitis B Virus (HBV) Infection

A Single and Repeated Dose Escalation, Phase I Clinical Study to Evaluate the Safety, Pharmacokinetics and Preliminary Pharmacodynamics of RBD1016 in Subjects with Chronic Hepatitis B Virus (HBV) Infection

This is a randomized, double-blind, placebo-controlled, single (Part A) and repeated dose (Part B) escalation, phase I clinical study to evaluate the safety, pharmacokinetics (PK) and preliminary pharmacodynamics (PD) of RBD1016 in subjects with chronic HBV infection.

The study consists of two parts. Part A is the single dose escalation study where subjects with chronic HBV infection will be assigned to receive single dose of RBD1016 or placebo . Part B is the multiple dose escalation study where subjects with chronic HBV infection will be assigned to receive two doses of RBD1016 or placebo.

Inclusion Criteria:

1. Subjects who voluntarily participate in this clinical trial, are able to correctly understand and have signed the informed consent in writing;
2. Male or female volunteer aged 18-55 years (inclusive);
3. Body Mass Index (BMI) of 18-30 kg/m2 (inclusive);
4. Subjects with chronic HBV infection, including immunotolerant subjects, treatment naïve subjects and treated subjects.
5. Ability to cooperate with study staff and comply with the study requirements and follow the protocol-specified procedures.

Exclusion Criteria:

1. Subjects with liver diseases other than hepatitis B, including hepatitis C, hemochromatosis, primary sclerosing cholangitis; alcoholic, drug-related or autoimmune liver diseases; primary liver cancer and indeterminate nodules on liver imaging test;
2. A history or manifestations of liver decompensation (e.g. Child-Pugh Class B or C, or ascites, gastrointestinal bleeding, hepatic encephalopathy or spontaneous bacterial peritonitis, etc.);
3. Transient elastography at screening revealing FibroScan value ≥ 9 kPa or liver biopsy evidencing hepatic fibrosis within 24 months;
4. The following laboratory findings: total serum bilirubin> 2×ULN; serum alpha-fetoprotein>50μg/L; serum albumin <3.5g/dL; international normalized ratio (INR)> 1.25; serum creatinine > 1.5×ULN; any laboratory outliers of clinical significance that in the investigator's opinion may interfere with the interpretation of efficacy or safety data;
5. 12-lead ECG abnormalities with clinical significance;
6. Pregnant or lactating women or women of child-bearing potential who are unwilling to take effective contraception throughout the course of the study (refer to Appendix 3 for details);
7. Other factors that in the investigator's opinion would make it inappropriate for the subject to participate in the study.