A Multicenter Study Evaluating the Safety and Tolerability of Intravenous rhMBL in Liver Transplant Recipients.

This is a multicenter, open-label, randomized, Phase 1B study evaluating liver transplant recipients receiving rhMBL (2 cohorts) or without rhMBL (1 cohort). Patients will have received an orthotopic liver transplant (OLT) or a living related donor (LRD) liver transplant. Patients in all cohorts are to receive immunosuppressant therapy and anti-infectious prophylactic supportive therapy according to institutional standards. The donor's mannose-binding lectin (MBL) genotype will be evaluated to determine the liver transplant recipient's study eligibility. For recipients receiving an OLT, a sample of liver tissue or lymph nodes will be collected from the donor liver at the time of organ harvest for MBL genotyping. For recipients receiving a LRD transplant, the MBL genotype of the LRD will be determined in a companion protocol, "Screening Protocol to Evaluate Mannose-Binding Lectin (MBL) Genotype in Living Related Donors for Liver Transplant Recipients." A recipient whose donor has an A/O or O/O MBL genotype will be eligible to participate in this study. Patients will be randomized in a 2:2:1 ratio to receive up to 8 intravenous (i.v.) infusions of rhMBL at a dose of 0.5 or 1.0 mg/kg, or to receive no rhMBL, respectively. Approximately 20 patients will be treated in each of the 2 rhMBL arms, and approximately 10 patients will be treated with standard immunosuppressive agents and anti-infectious prophylaxis but not with rhMBL. Cohort 1 * Number of Patients 20 * rhMBL (mg/kg) 0.5 Cohort 2 * Number of Patients 20 * rhMBL (mg/kg) 1.0 Cohort 3 * Number of Patients 10 * rhMBL (mg/kg) None