Study in Hepatitis C Virus (HCV) Infected Patients Undergoing Liver Transplantation to Evaluate a Human Monoclonal Antibody Against Hepatitis C

This is a Phase 2, randomized, double-blind, placebo controlled study in Hepatitis C (HCV)
infected patients undergoing liver transplantation. Chronically infected patients with HCV
genotype 1a scheduled to receive a liver transplant from either a deceased or living donor
who satisfy all study inclusion or exclusion criteria will be approached to participate. The
study will be conducted in two parts to test a human monoclonal antibody against Hepatitis C
(MBL-HCV1). In Part 1, sixteen eligible patients will be randomized 1:1 to receive 50 mg/kg
MBL-HCV1 or 0.9% sodium chloride placebo intravenously. Eleven doses will be given during
the first 14 days post transplantation. Patients will be evaluated through day 56 for safety
and clinical outcomes that include measurement of anti-HCV antibodies, anti-drug antibody
and HCV viral load. On study visit day 42, a liver biopsy will be performed for evaluation
of hepatitis. Physical examination, vital sign measurements, emergence of adverse events and
concomitant medication usage will be assessed at scheduled visits and as needed during the
56 day study period.

The Data Safety and Monitoring Board will perform a futility analysis after the first 16
patients have been enrolled and completed study follow-up through study visit day 42 post
transplant. Based on the results of the interim analysis, the dose of MBL-HCV1 for part 2 of
the study will be determined. Part 2 of the study will be conducted in the same manner as
Part 1.

Inclusion Criteria:

- Patient ≥ 18 years of age with documented chronic hepatitis C virus infection of
genotype 1a undergoing liver transplantation from either a deceased donor or living
donor.

- Patient or legal guardian/health care proxy must have read, understood and provided
written informed consent and HIPAA authorization after the nature of the study has
been fully explained.

Exclusion Criteria:

- Positive serology for Hepatitis B surface Antigen

- Positive serology for HIV

- Pregnancy or breastfeeding

- Previous history of any organ transplant

- Planned receipt of combined organ transplant (e.g. liver and kidney)

- Receipt or planned receipt of immune globulin (IVIG) within 90 days of enrollment

- History of extrahepatic malignancy and/or receiving chemotherapy within 90 days prior
to enrollment with the exception of chemoembolization for hepatocellular carcinoma

- Hepatocellular carcinoma with tumor burden outside of the Milan criteria

- History of chronic renal insufficiency or creatinine > 2.5 for ≥ six months

- Personal or family history of deep venous thrombosis or pulmonary embolism

- Receipt of liver allograft from HCV positive donor or Hepatitis B core antibody
positive donor

- Receipt of liver allograft donated after cardiac death of donor

- Receipt of any antiviral agents, licensed or investigational for hepatitis C virus
within 90 days prior to enrollment

- Receipt of any other investigational study product within 30 days prior to enrollment

- Any other condition that in the opinion of the investigator would jeopardize the
safety or rights of the patient participating in the study or make it unlikely that
the patient could complete the study