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Hypothermic Machine Perfusion for Liver Graft Preservation (HOPE-Liver)

14. května 2026 aktualizováno: University of Sao Paulo General Hospital

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

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

Intervenční

Zápis (Odhadovaný)

40

Fáze

  • Nelze použít

Kontakty a umístění

Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.

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

    • São Paulo
      • São Paulo, São Paulo, Brazílie, 05403-000
        • Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP)
        • 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
        • Dílčí vyšetřovatel:
          • Alexandre Santana, PhD

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

  • Dospělý
  • Starší dospělý

Přijímá zdravé dobrovolníky

Ne

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

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

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.
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.
Liver graft preservation using conventional static cold storage under hypothermic conditions until transplantation.

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.
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.
At 7 days, 30 days, 6 months, and 1 year after transplantation
Incidence of Acute Kidney Injury (AKI)
Časové okno: Within 7 days and up to 30 days after transplantation
Occurrence of acute kidney injury following liver transplantation, defined based on changes in serum creatinine levels according to established clinical criteria.
Within 7 days and up to 30 days after transplantation
Incidence of Post-Reperfusion Syndrome (PRS)
Časové okno: During transplantation procedure
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.
During transplantation procedure
Incidence of Post-Transplant Complications
Časové okno: Up to 1 year after transplantation
Occurrence of post-transplant complications, including biliary complications, vascular complications, infections, and acute rejection, assessed according to standard clinical definitions and severity grading systems.
Up to 1 year after transplantation
Graft Survival
Časové okno: Up to 1 year after transplantation
Survival of the transplanted liver graft without the need for retransplantation
Up to 1 year after transplantation
Patient Survival
Časové okno: Up to 1 year after transplantation
Survival of the transplant recipient following liver transplantation.
Up to 1 year after transplantation
Length of Intensive Care Unit Stay
Časové okno: From liver transplantation until intensive care unit discharge, up to 30 days
Duration of stay in the intensive care unit following liver transplantation.
From liver transplantation until intensive care unit discharge, up to 30 days
Length of Hospital Stay
Časové okno: From liver transplantation until hospital discharge, up to 30 days
Duration of hospital stay following liver transplantation.
From liver transplantation until hospital discharge, up to 30 days

Další výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Analysis of Perfusate Biomarkers
Časové okno: During machine perfusion and immediately prior to transplantation
Assessment of biochemical and metabolic biomarkers in perfusate samples collected during hypothermic machine perfusion, aiming to evaluate graft viability and ischemia-reperfusion injury.
During machine perfusion and immediately prior to transplantation
Assessment of Mitochondrial Function Biomarkers (Flavin Mononucleotide, FMN)
Časové okno: During machine perfusion period
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.
During machine perfusion period
Assessment of Inflammatory Biomarkers
Časové okno: During machine perfusion and within the first 7 days after transplantation
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.
During machine perfusion and within the first 7 days after transplantation
Histological Assessment of Liver Graft Injury
Časové okno: During the perioperative period, including before and after machine perfusion and prior to transplantation
Histological evaluation of liver tissue samples to assess ischemia-reperfusion injury, inflammation, and structural integrity of the graft.
During the perioperative period, including before and after machine perfusion and prior to transplantation

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

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

Osoba odpovědná za zadávání informací o studiu tyto publikace poskytuje dobrovolně. Mohou se týkat čehokoli, co souvisí se studiem.

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia (Odhadovaný)

7. května 2026

Primární dokončení (Odhadovaný)

7. května 2027

Dokončení studie (Odhadovaný)

7. května 2028

Termíny zápisu do studia

První předloženo

6. května 2026

První předloženo, které splnilo kritéria kontroly kvality

14. května 2026

První zveřejněno (Aktuální)

19. května 2026

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Aktuální)

19. května 2026

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

14. května 2026

Naposledy ověřeno

1. května 2026

Více informací

Termíny související s touto studií

Plán pro data jednotlivých účastníků (IPD)

Plánujete sdílet data jednotlivých účastníků (IPD)?

NEROZHODNÝ

Popis plánu IPD

No final decision has been made regarding the sharing of individual participant data (IPD). The study involves clinical data and biological samples, including biomarker analyses, which require careful consideration regarding data anonymization, ethical approvals, and institutional policies. A data sharing plan may be developed in the future in accordance with applicable regulations and journal requirements.

Informace o lécích a zařízeních, studijní dokumenty

Studuje lékový produkt regulovaný americkým FDA

Ne

Studuje produkt zařízení regulovaný americkým úřadem FDA

Ne

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