This study is to investigate the clinical efficacy and safety of RL-1 Novel Human-derived Bio-artificial Liver treatment in patients with Hepatitis b virus related acute-on-chronic liver failure.

Hepatitis b virus (HBV) related acute-on-chronic liver failure (ACLF) is a serious condition with high mortality rate in China. But there still lacks of effective therapies in treatment of HBV related ACLF, except liver transplantation. RL-1 Novel Human-derived Bio-artificial Liver treatment may be an effective and safe therapy due to the previous clinical data. This study is to investigate the clinical efficacy and safety of RL-1 Novel Human-derived Bio-artificial Liver treatment in patients with HBV related ACLF.

Inclusion Criteria:

1. Positive hepatitis b surface antigen or hepatitis b virus DNA > 0.5 year;
2. Age from 18 to 65 years old;
3. Serum total bilirubin level > 10 times upper limit of normal;
4. Prothrombin time activity < 40% and ≥30%；
5. Platelets > 50*10 E9/L.

Exclusion Criteria:

1. Other active liver diseases;
2. Hepatocellular carcinoma or other malignancy;
3. Pregnancy or lactation;
4. Human immunodeficiency virus infection or congenital immune deficiency diseases;
5. Severe diabetes, autoimmune diseases;
6. Other important organ dysfunctions;
7. Severe complications including severe infection, gastrointestinal bleeding, hepatic encephalopathy, hepatorenal syndrome;
8. Patients can not follow-up;
9. Investigator considering inappropriate.