This trial adopts a randomized, double-blind, positive drug-controlled, dose-escalated phase Ib clinical study evaluating the safety, tolerability, pharmacokinetic characteristics and preliminary effectiveness of recombinant human serum albumin in patients with liver cirrhosis and ascites

subjects (both male and female) were screened and enrolled to the three dose levels of 10g, 20 g,and 30 g according to the principle of dose escalation, and 8 out of 12 subjects in each dose group One patient received the test drug, and 4 received a positive drug.

In this Phase Ib clinical trial, randomized, double-blind, positive-controlled, dose-increasing design was employed to enroll cirrhosis ascites patients and evaluate safety, tolerability, PK characteristics, PD characteristics and preliminary efficacy at different dose levels of recombinant human serum albumin.

Three dose groups (10 g/day, 20 g/day, 30 g/day) were set up in this study, and they were escalated from the lowest to the highest dosage. It is planned to enroll 12 subjects in each dose group, with 8 of 12 subjects in each dose group receiving the investigational product and 4 of 12 subjects receiving the comparator product intravenously once a day for 14 days or up to serum albumin ≥ 35 g/L ( whichever occurs first ), to investigate the safety, tolerability, immunogenicity, PK characteristics, PD characteristics and preliminary efficacy in repeated usage of recombinant human serum albumin.

Inclusion Criteria:

1. Agree to follow the experimental treatment plan and visit plan, voluntarily enroll in the group, and sign the informed consent in person;
2. Age ≥18 years old and <65 years old on the day of signing the informed consent, no gender limitation; Body mass index (BMI) ranged from 18.0 kg/m2 to 29.0 kg/m2 (including boundary values);
3. Patients clinically diagnosed as decompensated cirrhotic ascites with ascites grade 1-2 and serum albumin (ALB) <30 g/L confirmed by abdominal ultrasonography during screening period;
4. Men and women of child-bearing age with fertility (childbearing age women including premenopausal women and 2 years after menopause women) from willing to sign a consent form began to experiment with drugs within 3 months after the last delivery effective precautions (take a condom, contraceptive sponge, contraceptive gel, diaphragm, intrauterine device, oral or injectable contraceptives, subcutaneous preparetions Agent, etc.); Women of reproductive age must have a negative pregnancy test no later than 7 days before the first investigational drug is administered.

Exclusion Criteria:

Patients who meet any of the following criteria are not eligible for inclusion:

1. Patients with malignant ascites;

2. People who have a known history of allergy/allergic reaction to yeast or yeast-derived products or are allergic to any component of the study product; Patients with an allergic constitution (multiple drug or food allergy), a history of allergic to biological products, or a history of severe systemic allergic reaction caused by other reasons, and the investigator judges that they are not suitable for treatment with experimental drugs;

3. The patient has the following abnormal laboratory tests:

   Bone marrow function: absolute value of neutrophils (ANC) <1.0×109/L (1000/mm3); Platelet (PLT) <20×109/L (2×104/mm3); Hemoglobin (HGB) <7.0 g/dL;Liver function: alanine aminotransferase (ALT) > 5×ULN (upper normal value); Aspartate aminotransferase (AST) > 5×ULN; Serum bilirubin (T-Bil) >3× upper normal value (ULN);Renal function: serum creatinine >2× upper normal value (ULN); Positive urine protein and ineligible to participate in the test judged by the investigator; coagulation function: prothrombin activity <40%;

4. Active cardiovascular disease or history at the time of screening, or other conditions that the investigator determined were not suitable for human serum albumin therapy, including but not limited to hypertension (systolic blood pressure >140 mmHg or diastolic blood pressure >90 mmHg), Researchers determine drug control is good and stable condition except), severe anemia, heart disease, acute severe lung or structural heart disease, severe arrhythmia, normal blood volume (or high blood volume) of decompensated heart failure, unstable angina, nearly six months prior to screening the myocardial infarction, require drug treatment of tachycardia/slow, three degree atrioventricular block, etc.;

5. At the time of screening, there was a history of active metabolic system disease or other renal injury that the investigator determined was unsuitable for serum albumin treatment, including but not limited to renal/postrenal anuria, hepatorenal syndrome (HRS), chronic kidney disease, hepatitis B related nephropathy, etc.;

6. Patients with the following active concurrent diseases during screening, including but not limited to, Pulmonary edema, bleeding tendency, or active bleeding disease, sustained or active infection (including active spontaneous bacterial peritonitis (SBP)), according to West - Haven classification standard diagnosis of hepatic encephalopathy grade III or IV level, portal venous tumor emboli/blood clots, circulation dysfunction after abdominal puncture, ultrasound and other imaging examination of biliary obstructive disease Disease, thyroid dysfunction (grade 3 and above according to NCI CTCAE version 5.0);

7. Patients with previous history of upper gastrointestinal bleeding within 1 month or gastrointestinal bleeding within 3 months (≥2 times) or high risk of bleeding during the study as assessed by the investigator;

8. Patients with active malignancies (including hepatocellular carcinoma [HCC]) at the time of screening, or with a history of malignant tumors within 5 years (except cancer in situ, non-melanoma skin cancer, localized prostate cancer, ductal carcinoma in situ and other very low-risk malignancies of cervical or breast cancer undergoing curative treatment);

9. Those who have received corticosteroids or human plasma preparations (including human serum albumin preparations) within 20 days prior to the first administration of the investigational drug; Those with a history of organ transplantation; Those requiring or planning to undergo invasive tests or treatment during the study period;

10. Participating in or participating in clinical trials of other new drugs or medical devices and using investigational drugs/investigational treatments within 30 days prior to screening; Prior participation in clinical trials of recombinant human serum albumin;

11. HIV antibody test positive, or syphilis (defined as positive syphilis antibody test and positive retin test);

12. Pregnant or lactating women;

13. Other reasons that the researcher considers inappropriate to participate in this study.

double-blind