View clinical trials related to Liver Transplantation.
Filter by:The purpose of this study is to study the effects of a structured Mediterranean dietary program on prevention of weight gain, promotion of heart health and prevention of fatty liver disease after liver transplantation.
Kidney and liver transplantation requires a fine tuning of immune responses in order to achieve long term operational tolerance with immunosuppressants or immune modulators. Numerous experimental findings indicate that CD4+ FOXP3 expressing regulatory T (Treg) cells play a central role in the induction of tolerance to the grafts indicating that the use of Treg cells may be an innovative therapeutic strategy in kidney transplantation that would enable the diminution of immunosuppressive drugs or even their discontinuation, thus decreasing their risk of adverse events. As human Treg cells represent less than 10% of CD4+ T cells, and because it has been shown in mice that a dose of 2*104 polyclonal Tregs/g was necessary to induce tolerance in animal models of solid organ transplantation, it is mandatory to expand human Treg cells ex vivo, after isolating them from peripheral blood. The investigators previously defined a protocol for Treg cell isolation and expansion in clinical grade conditions (cGMP) that enabled us to obtain the expected number of expanded cells maintaining high levels of FOXP3 (3). The investigators therefore hypothesize in humans, as it has been already shown in mice, that the infusion of autologous expanded polyclonal Treg cells would lead to the obtaining of operational tolerance in kidney and liver graft in association with classical immunosuppressants and an expectable diminution of those. To this end, it is necessary to have pre-clinical batches of expanded Treg cells validated by the National Agency for Medicines and Health Products Safety validate (ANSM). The investigators therefore plan to have 4 batches from 2 liver transplant patients and 2 kidney transplant patients validated.
Tacrolimus (TAC) is characterized by a narrow therapeutic window, as well as high inter- and intra-individual variability in pharmacokinetics. Both under- and overexposure may lead to severe adverse effects. Therapeutic drug monitoring (TDM) is an essential element of post-transplant patient care. Most transplantation centers use C0 to adjust TAC dosage. Some controversies remain about relationship between C0 and clinical outcome. It is generally accepted that only protein-unbound drug molecules can cross cellular membranes, which imply that TDM of free tacrolimus fraction may be of paramount importance and improve clinical management of organ recipients. Whole blood TAC concentrations and dose requirements are strongly associated with CYP3A5 polymorphism. Routine CYP3A5 genotyping on the waiting lists might be useful to guide tacrolimus dosing. This interdisciplinary project tackles the research problem from three angles - biochemistry, genetics and clinical observation. The primary goal of the study is to evaluate clinical usefulness of different TDM protocols in patients after kidney and liver transplantation.
The common practice of conventional cold storage (CCS) organ preservation has changed little since the initial introduction of the original University of Wisconsin (UW) organ preservation solution in the late 1980s. CCS relies on hypothermia to decelerate metabolism and reduce oxygen demand in order to prolong the time of ischemia without rapid functional graft impairment, therefore merely delaying graft damage. While CCS only prolongs storage time and limits the damage sustained during the period of cold ischemia, ex-vivo machine perfusion (MP) appears to be capable of reversing some of these effects. Currently, two main paradigms prevail in the clinical approach to liver allograft MP: hypothermic oxygenated MP (HOPE) may be seen as a dynamic alternative of the traditional organ preservation based on hypothermia-induced deceleration of metabolism, which aims to combine the positive effects of hypothermia observed in classical cold storage (e.g. technical simplicity, relative safety, decreased metabolism) with the positive effects of dynamic preservation (e.g. controlled sheer stress mediated gene activation, removal of metabolites, transport of oxygen and ATP recharging). Normothermic perfusion (NMP) aims at re-equilibration of cellular metabolism by preserving the organ at physiological temperatures whilst ensuring sufficient oxygen and nutrient supply. In both approaches, the perpetual circulation and moderate shear-stress sustain endothelial functionality. While past and current clinical trials were designed to compare different MP approaches with CCS as the clinical standard, a direct comparison between different end-ischemic MP techniques (HOPE versus NMP) is still lacking. The purpose of this study is to test the effects of end-ischemic NMP versus end-ischemic HOPE technique in a multicentre prospective randomized controlled clinical trial (RCT) on ECD liver grafts in DBD liver-transplantation (HOPE-NMP). Two-hundred-thirteen (n = 213) human whole organ liver grafts will be submitted to either 4-24 hours of NMP (n = 85) or 2-3 hours of HOPE (n = 85) directly before implantation and going to be compared to a control-group of patients (n = 43) transplanted with static cold storage preserved ECD-allografts. Primary (surgical complications as assessed by the comprehensive complication index [CCI]) and secondary (among others laboratory values, graft- and patient survival, hospital costs, hospital stay) endpoints are going to be analysed.)
This study was designed to demonstrate incidence of biliary complication rates after living donor liver transplantation according to the implantation of external biliary drainage throug duct-to-duct anastomosis site.
Management of ACLF is mainly supportive. The poor outcomes lead physicians to consider liver transplantation as an option, even if controversial. In sicker recipients, LT results in immediate survival, but poor medium-term survival rates in some studies. The scarcity of deceased donors obliges to maximize LT success. Alternative strategies, as living-donor LT, should be explored. LDLT has impressive results in Eastern centers, but it is restrained in Western countries, due to potential life-threatening complications in the donor.
Hepatocellular carcinoma (HCC) is the second commonest cause of cancer death worldwide. Liver transplantation (LT) is the best curative treatment of HCC meeting Milan/UCSF criteria. Milan (solitary tumour <5cm, or up to 3 tumours, each <3cm) and University of California San Francisco (UCSF) criteria (solitary tumour ≤6.5cm, up to 3 tumours with none >4.5cm, and total tumour diameter ≤8cm) provide the benchmark requirements for LT, at which a 5-year survival of >70% and recurrence rate ranging from 5-15% can be achieved. Recently, FOLFOX (Oxaliplatin and 5-fluorouracil) based hepatic artery infusion chemotherapy (HAIC) exhibited high response rate for advanced HCC. Neo-adjuvant TAI for the HCC patients with beyond criteria serving as a down-staging method for the advanced HCC to meet Milan/UCSF criteria，and qualify for LT. This study is to compare the impact on survival of neo-adjuvant TAI for patients with beyond Milan/UCSF Criteria HCC who underwent LT.
Kidney injury is a common complication following liver transplantation and is associated with a higher complication rate and increased risk of death. While there are many factors that likely contribute to kidney injury in the perioperative period, a relative low serum level of angiotensin 2 (Ang 2) (a protein hormone that causes blood vessels to narrow) found in patients with liver cirrhosis (late stage of liver damage) may increase their risk of developing acute kidney injury (sudden episode of kidney failure or damage). We propose to investigate how early administration of Ang 2, a new vasopressor drug approved by the FDA in December 2017 for patients with low blood pressure, during the intra-operative period of liver transplant surgery affects the rate of kidney injury after transplantation. Patients who are deemed appropriate candidates for the study will be randomized 1:1 to the treatment and control groups. The intervention period of the study will occur in the operating room during transplant surgery and will be performed by their anesthesiologists. In the Treatment group, patients will receive Ang 2 infusions in addition to other standard vasopressors while patients in the control group will receive standard vasopressors alone. The infusion of Ang 2 in the treatment group will continue through the duration of the surgery and will be stopped prior to leaving the operating room. Both the treatment group and the control group will then be followed for 14 days to evaluate rates of kidney injury and to look for any complications. The follow up period will be extended to 28 days to look at in-hospital mortality rates in both groups. The daily follow up analysis will occur while the enrolled patients are inpatient following their transplantation surgery and will be done by looking at lab values and other data that is routinely gathered by their managing teams. This study will serve as a pilot study to evaluate feasibility of our protocol and to collect some preliminary data on the use of Ang 2 in this patient population. As such we plan to enroll approximately 30 patients who have accepted an offer to receive a donor liver. We hope to reach our goal enrollment within 5 months of starting the study.
In solid organ transplant recipients, poor adherence to immunosuppressant medications carries the risk of graft rejection (needing a new transplant), post-transplant complications, and increased healthcare costs. Additionally, nonadherence to immunosuppressant medications is imperative to short- and long-term outcomes. The rate of nonadherence in this population varies vastly. Because of lacking objective and accurate nonadherence measurements, both to immunosuppressant drugs and medical indications, the true implications and prevalence of nonadherence is not yet well understood. Therefore, investigators believe that mobile health (mHealth) technology has the potential to allow clinicians and researchers to more comprehensively address and understand nonadherence in solid organ transplant recipients. The aim of this study is to conduct a randomized control trial to compare medication adherence among liver and kidney transplant patients who use the mHealth system against controls who do not.
Enhanced recovery after surgery (ERAS) programs were developed by Prof Henrik Kehlet in Denmark to reduce the hospitalization and improve the surgical outcomes. In these programs pain relief by regional analgesia techniques are highly recommended to reduced as much as possible the opioids used with their side effects. This program was created for colo-rectal surgeries and extended to other surgeries. In Liver transplants different programs has been described top reduce the use of peri-operative opioids but no with the ESP Animal and molecular studies in chronic pain showed the activation of glial cells, Monocytes and lymphocite K similar to the reaction during severe septis with immune reaction and toll like receptor activation. Regional anaesthesia analgesia is blocking this activation of Tool Like Receptors (TLR4) One of the discharge criteria after liver transplantation is the equilibrium of plasmatic cyclosporin Our hypothesis is with regional analgesia to avoid any immune disorder due to pain and reach earlier the discharge criteria than with standard analgesia Improve the quality of recovery and reduce the hospitalization stay after liver transplantation