A Phase I/II Safety and Tolerability Dose Escalation Study of Autologous Stem Cells to Patients With Liver Insufficiency

Overview

This is a prospective dose escalation study of the administration of adult human stem cells in patients with end stage liver failure. Successive groups of two patients will receive ascending doses of autologous adult human stem cells starting at 1x10\[9\] cells. Following expansion in an approved Good Manufacturing Practice (GMP) facility the cells will be infused into either the hepatic artery or portal vein of research participants. The aim of this trial is to determine the maximum tolerated dose of autologous adult stem cells when infused into either the hepatic artery or the portal vein. The maximum dose that would be given would be 5x10 to the ten \[10\]. To assess improvement in liver function as measured by serological and biochemical analysis and determine whether there are any symptomatic improvements as reported by the patients.

This is a prospective dose escalation study of the administration of expanded autologous adult human stem cells in patients with chronic liver insufficiency. Four groups of two patients will receive ascending doses of autologous adult human stem cells starting at a dose of 1 x 10\[8\] cells. The cells will be infused into either the hepatic artery or the portal vein of research participants. The consultant radiologist will review a duplex Doppler scan of the blood supply to the liver to determine the safest route for delivery of the cells. The first patients (01 and 02) will receive 1 x 10\[8\] cells. If no adverse events are observed in either patient in the two-week period post stem cell administration, patient numbers 03 and 04 will receive 5 x 1\[08\] cells. This will continue through patients 05 and 06 receiving cells at 1 x 10\[9\] and 07 and 08 receiving 5 x 10\[9\] cells. If any patient in any cohort suffers adverse events considered to be treatment-related, the next group of patients will receive cells at a concentration one step down from that received by the patient suffering the adverse events. At the completion of this first stage of the study, if no adverse treatment related events are seen, a further group of 10 patients will receive cells at a concentration of 5 x 10\[9\] cells. It should be noted that if fewer cells are obtained at the end of the expansion period the re-infusion of the cells to the patient should nonetheless continue. This patient will be considered inevaluable and the next participant will be allocated their trial number. The total period that each patient will be participating in the study is 12 weeks and the total duration of this clinical trial is expected to be approximately 12 months. All patients will be assessed 4 weeks after coming off study (week 12), whether from completion of protocol or early withdrawal for whatever reason. They will also be monitored in the clinic for the remainder of their life. Patients who are withdrawn due to issues of toxicity will be followed until the adverse event is resolved or the outcome is known. Patients will then be followed-up for four weeks after resolution and thereafter for life in the clinic.