Hepatocellular Carcinoma Clinical Trial
Official title:
Hypothermic Oxygenated Perfusion To Reduce Tumour Recurrence After Liver Transplantation In Patients With Hepatocarcinoma
Hypothermic oxygenated ex-situ machine perfusion (HOPE) is a dynamic preservation method that has been developed to reduce the incidence and severity of ischaemia-reperfusion injury and to improve outcomes after liver transplantation. Whit this study Pi and collaborators hypothesize that the application of ex-situ liver perfusion before LT in HCC recipients leads to an optimization of graft function, with a decrease in ischaemia-reperfusion injury and a possible decrease in tumor cell growth. This is multicentre, prospective, two-arm, randomized, controlled, clinical trial, that will will involve patients with HCC candidate to LT. The liver grafts will be randomized in two groups to compare HOPE and static cold storage (SCS) preservation before transplantation. For each group evaluation of clinical outcomes, graft function tests, histologic findings, perfusate, tumor characteristics, and recurrence will be done.
Tumor recurrence after liver transplantation (LT) in patients with hepatocellular carcinoma (HCC) is a major complication leading to decreased long-term survival of patients. However, the mechanisms leading to tumor emergence and growth remain incompletely understood. Several factors, can promote cancer growth or recurrence. Ischemia-reperfusion injury (IRI) has been recognized as an important early driver of microvascular dysfunction resulting in tissue hypoxia and inflammation, which promotes tumor cell growth. A recent therapeutic strategy used to reduce the incidence and severity of IRI and to improve outcomes after transplantation is ex vivo HOPE. Which allows to redirect anaerobic metabolism to aerobic metabolism under hypothermic conditions, protect grafts from oxidative species-related damage, improve graft function and may potentially reduce cancer recurrence after liver transplantation. A multicentre, prospective, two-arm, randomized, controlled, clinical trial will be performed; four Italian centres (Bologna, Palermo, Pisa e Torino) will be involved. A total of 192 patients with a history of HCC or active HCC, already present or about to be placed in the liver transplantation waiting list of the four transplantation center will be enroll. The liver grafts will be randomized in two groups to compare HOPE and SCS preservation before transplantation. For each group evaluation of clinical outcomes, graft function tests, histologic findings, perfusate, tumor characteristics, and recurrence will be done during follow up visit; 1-3-6 and 12 months after transplantation. Livers assigned to HOPE group will be perfused by machine perfusion with cold Belzer solution (4°-10°C) and with continuous oxygenation (partial pressure of oxygen = 500-600 mmHg). Organs will be perfused from the start of the back-table procedure until implantation, without increasing cold ischemia time (CIT). In the control group livers undergoing SCS will be steeped in cold Celsior or Belzer solutions and stored in ice. Presence of bacterial and/or fungal contamination will be tested by setting up microbiological cultures from the preservation fluid, before and after treatment in both groups. ;
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