- ICH GCP
- Registr klinických studií v USA
- Klinická studie NCT07595627
Hypothermic Machine Perfusion for Liver Graft Preservation (HOPE-Liver)
Prospective and Randomized Clinical Study of the Effect of Hypothermic Machine Perfusion on Liver Graft Preservation
The goal of this clinical trial is to evaluate whether hypothermic machine perfusion improves liver graft preservation and post-transplant outcomes compared to conventional static cold storage in adult patients undergoing liver transplantation. This study focuses on liver grafts from deceased donors, including those with extended criteria, which are more susceptible to ischemia-reperfusion injury and early graft dysfunction.
The main questions it aims to answer are:
Does hypothermic machine perfusion reduce ischemia-reperfusion injury and improve early graft function after liver transplantation? Does this preservation strategy improve clinical outcomes, including graft survival, complication rates, and post-transplant recovery, compared to static cold storage?
Researchers will compare hypothermic machine perfusion (ex situ, oxygenated perfusion at low temperature) to standard static cold storage to assess differences in graft preservation quality and post-transplant outcomes.
Participants will:
Receive a liver graft preserved either by hypothermic machine perfusion or static cold storage, according to a 1:1 randomization protocol Undergo standard liver transplantation procedures Be followed after transplantation with clinical, laboratory, imaging, and biomarker assessments at predefined time points (7 days, 30 days, 6 months, and 1 year)
Additional evaluations will include biochemical markers of liver function, inflammatory and immunological mediators, mitochondrial function assessment, and histological analysis to better characterize graft injury and recovery.
Přehled studie
Postavení
Podmínky
Intervence / Léčba
Detailní popis
This is a prospective, single-center, randomized controlled clinical trial designed to evaluate the impact of hypothermic machine perfusion on liver graft preservation and post-transplant outcomes in adult liver transplantation.
Liver transplantation is the standard treatment for end-stage liver disease; however, outcomes are strongly influenced by graft quality. The increasing use of extended criteria donors has introduced additional challenges, as these grafts are more susceptible to ischemia-reperfusion injury, a key determinant of early graft dysfunction and post-transplant complications. Conventional static cold storage, although widely used, does not prevent ongoing anaerobic metabolism and progressive depletion of cellular energy stores, contributing to mitochondrial dysfunction, oxidative stress, and inflammatory activation upon reperfusion.
Hypothermic machine perfusion has emerged as an alternative preservation strategy by providing continuous oxygenated perfusion under controlled hypothermic conditions. This approach aims to preserve mitochondrial integrity, reduce metabolic stress, and mitigate ischemia-reperfusion injury, thereby potentially improving graft viability and expanding the utilization of marginal organs.
In this study, liver grafts from deceased donors will be allocated to either hypothermic machine perfusion or conventional static cold storage. Following procurement, grafts assigned to the intervention group will undergo ex situ hypothermic perfusion using an oxygenated preservation solution under controlled conditions, while the control group will follow standard institutional preservation protocols.
All transplant procedures and perioperative management will be conducted according to institutional standards. Post-transplant follow-up will include clinical and laboratory monitoring to assess graft function and detect complications.
Typ studie
Zápis (Odhadovaný)
Fáze
- Nelze použít
Kontakty a umístění
Studijní kontakt
- Jméno: Wellington Andraus, MD, PhD
- Telefonní číslo: +5511982118909
- E-mail: wellington@usp.br
Studijní záloha kontaktů
- Jméno: Alexandre Santana, PhD
- Telefonní číslo: +5511931002779
- E-mail: alesantana@usp.br
Studijní místa
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São Paulo
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São Paulo, São Paulo, Brazílie, 05403-000
- Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP)
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Kontakt:
- Wellington Andraus, MD, PhD
- Telefonní číslo: +5511982118909
- E-mail: wellington@usp.br
-
Kontakt:
- Alexandre Santana, PhD
- Telefonní číslo: +5511931002779
- E-mail: alesantana@usp.br
-
Vrchní vyšetřovatel:
- Wellington Andraus, MD, PhD
-
Dílčí vyšetřovatel:
- Rubens Junior, MD, PhD
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Dílčí vyšetřovatel:
- Alexandre Santana, PhD
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Kritéria účasti
Kritéria způsobilosti
Věk způsobilý ke studiu
- Dospělý
- Starší dospělý
Přijímá zdravé dobrovolníky
Popis
Donor-related inclusion criteria:
- Liver donors with confirmed diagnosis of brain death.
- Extended criteria donors (ECD).
- Age ≥18 years.
- Family consent for organ donation obtained.
- Negative serology for HTLV, HIV, Chagas disease, and hepatitis B and C.
Recipient-related inclusion criteria:
- Adult patients (≥18 years) undergoing liver transplantation.
- Diagnosis of end-stage liver disease or indication for liver transplantation.
- Candidates for primary liver transplantation.
- Ability to understand and provide written informed consen
Donor-related exclusion criteria:
- Presence of moderate or severe hepatic steatosis.
- Pediatric donors.
- Donors classified as ideal, defined by the simultaneous presence of all of the following criteria: Age <35 years, Body mass index (BMI) <28 kg/m², No history of cardiopulmonary resuscitation, Norepinephrine requirement <0.5 µg/kg/min, Liver enzymes (AST or ALT) ≥2 times the upper limit of normal, Intensive care unit stay ≤7 days
Recipient-related exclusion criteria:
- Complex portal vein thrombosis (grade III or IV).
- Combined or dual organ transplantation.
- Retransplantation.
- Acute liver failure.
- MELD score >30.
- History of multiple prior liver or biliary surgeries.
Studijní plán
Jak je studie koncipována?
Detaily designu
- Primární účel: Léčba
- Přidělení: Randomizované
- Intervenční model: Paralelní přiřazení
- Maskování: Žádné (otevřený štítek)
Zbraně a zásahy
Skupina účastníků / Arm |
Intervence / Léčba |
|---|---|
|
Experimentální: Hypothermic Machine Perfusion
Liver grafts are preserved using hypothermic machine perfusion prior to transplantation.
Following procurement and an initial period of static cold storage, grafts undergo ex situ hypothermic oxygenated perfusion under controlled conditions before implantation.
|
Hypothermic machine perfusion of the liver graft is performed prior to transplantation using an ex situ perfusion system under controlled conditions, in which an oxygenated perfusate is circulated through the liver graft vasculature.
|
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Aktivní komparátor: Static Cold Storage
Liver grafts are preserved using conventional static cold storage according to standard institutional protocols.
Following procurement, grafts are maintained under hypothermic conditions without active perfusion or oxygenation until implantation.
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Liver graft preservation using conventional static cold storage under hypothermic conditions until transplantation.
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Co je měření studie?
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
Incidence of Early Allograft Dysfunction (EAD)
Časové okno: Within 7 days after transplantation
|
Early allograft dysfunction is defined according to established clinical criteria, including at least one of the following within the first 7 days after transplantation: total bilirubin ≥10 mg/dL on day 7, international normalized ratio (INR) ≥1.6 on day 7, or alanine or aspartate aminotransferase (ALT or AST) levels >2000 IU/L within the first 7 days.
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Within 7 days after transplantation
|
Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
Change in Liver Function Tests (AST, ALT, Total Bilirubin)
Časové okno: At 7 days, 30 days, 6 months, and 1 year after transplantation
|
Serial measurements of liver function parameters, including aspartate aminotransferase (AST), alanine aminotransferase (ALT), and total bilirubin, obtained through routine laboratory testing following liver transplantation.
Values will be analyzed over time to assess graft function and recovery.
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At 7 days, 30 days, 6 months, and 1 year after transplantation
|
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Incidence of Acute Kidney Injury (AKI)
Časové okno: Within 7 days and up to 30 days after transplantation
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Occurrence of acute kidney injury following liver transplantation, defined based on changes in serum creatinine levels according to established clinical criteria.
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Within 7 days and up to 30 days after transplantation
|
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Incidence of Post-Reperfusion Syndrome (PRS)
Časové okno: During transplantation procedure
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Occurrence of post-reperfusion syndrome during liver transplantation, defined as a decrease in mean arterial pressure greater than 30% from baseline within the first minutes after graft reperfusion, with or without the need for increased vasopressor support.
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During transplantation procedure
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Incidence of Post-Transplant Complications
Časové okno: Up to 1 year after transplantation
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Occurrence of post-transplant complications, including biliary complications, vascular complications, infections, and acute rejection, assessed according to standard clinical definitions and severity grading systems.
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Up to 1 year after transplantation
|
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Graft Survival
Časové okno: Up to 1 year after transplantation
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Survival of the transplanted liver graft without the need for retransplantation
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Up to 1 year after transplantation
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Patient Survival
Časové okno: Up to 1 year after transplantation
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Survival of the transplant recipient following liver transplantation.
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Up to 1 year after transplantation
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Length of Intensive Care Unit Stay
Časové okno: From liver transplantation until intensive care unit discharge, up to 30 days
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Duration of stay in the intensive care unit following liver transplantation.
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From liver transplantation until intensive care unit discharge, up to 30 days
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Length of Hospital Stay
Časové okno: From liver transplantation until hospital discharge, up to 30 days
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Duration of hospital stay following liver transplantation.
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From liver transplantation until hospital discharge, up to 30 days
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Další výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
Analysis of Perfusate Biomarkers
Časové okno: During machine perfusion and immediately prior to transplantation
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Assessment of biochemical and metabolic biomarkers in perfusate samples collected during hypothermic machine perfusion, aiming to evaluate graft viability and ischemia-reperfusion injury.
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During machine perfusion and immediately prior to transplantation
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Assessment of Mitochondrial Function Biomarkers (Flavin Mononucleotide, FMN)
Časové okno: During machine perfusion period
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Measurement of mitochondrial injury and function through biomarkers such as flavin mononucleotide (FMN) in perfusate and/or biological samples, as an indicator of ischemia-reperfusion injury and graft viability.
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During machine perfusion period
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Assessment of Inflammatory Biomarkers
Časové okno: During machine perfusion and within the first 7 days after transplantation
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Evaluation of inflammatory mediators, including cytokines such as interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α), in biological samples to characterize the inflammatory response associated with transplantation and preservation strategies.
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During machine perfusion and within the first 7 days after transplantation
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Histological Assessment of Liver Graft Injury
Časové okno: During the perioperative period, including before and after machine perfusion and prior to transplantation
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Histological evaluation of liver tissue samples to assess ischemia-reperfusion injury, inflammation, and structural integrity of the graft.
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During the perioperative period, including before and after machine perfusion and prior to transplantation
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Spolupracovníci a vyšetřovatelé
Spolupracovníci
Vyšetřovatelé
- Vrchní vyšetřovatel: Wellington Andraus, MD, PhD, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP)
- Studijní židle: Rubens Macedo Junior, MD, PhD, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP)
- Ředitel studie: Alexandre Santana, PhD, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP)
Publikace a užitečné odkazy
Obecné publikace
- Czigany Z, Lurje I, Schmelzle M, Schoning W, Ollinger R, Raschzok N, Sauer IM, Tacke F, Strnad P, Trautwein C, Neumann UP, Fronek J, Mehrabi A, Pratschke J, Schlegel A, Lurje G. Ischemia-Reperfusion Injury in Marginal Liver Grafts and the Role of Hypothermic Machine Perfusion: Molecular Mechanisms and Clinical Implications. J Clin Med. 2020 Mar 20;9(3):846. doi: 10.3390/jcm9030846.
- Patrono D, Surra A, Catalano G, Rizza G, Berchialla P, Martini S, Tandoi F, Lupo F, Mirabella S, Stratta C, Salizzoni M, Romagnoli R. Hypothermic Oxygenated Machine Perfusion of Liver Grafts from Brain-Dead Donors. Sci Rep. 2019 Jun 27;9(1):9337. doi: 10.1038/s41598-019-45843-3.
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia (Odhadovaný)
Primární dokončení (Odhadovaný)
Dokončení studie (Odhadovaný)
Termíny zápisu do studia
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Aktuální)
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Více informací
Termíny související s touto studií
Klíčová slova
Další relevantní podmínky MeSH
Další identifikační čísla studie
- 7.497.991
- 2025/08106-0 (Jiné číslo grantu/financování: São Paulo Research Foundation (FAPESP))
Plán pro data jednotlivých účastníků (IPD)
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Popis plánu IPD
Informace o lécích a zařízeních, studijní dokumenty
Studuje lékový produkt regulovaný americkým FDA
Studuje produkt zařízení regulovaný americkým úřadem FDA
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