Journal
AMERICAN JOURNAL OF TRANSPLANTATION
Volume 21, Issue 2, Pages 614-625Publisher
WILEY
DOI: 10.1111/ajt.16219
Keywords
early allograft dysfunction; graft survival; ischemia-reperfusion injury; liver biopsy; liver steatosis
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Funding
- National Institutes of Health [P01 AI120944]
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This study investigated the correlation between the severity of IRI and short-term graft outcomes, demonstrating that severe IRI was associated with higher incidence of EAD and inferior survival. Independent risk factors for moderate to severe IRI and EAD were identified, providing valuable insights for optimizing donor-recipient matching and patient management in liver transplantation.
Ischemia-reperfusion injury (IRI) is believed to contribute to graft dysfunction after liver transplantation (LT). However, studies on IRI and the impact of early allograft dysfunction (EAD) in IRI grafts are limited. Histological IRI was graded in 506 grafts from patients who had undergone LT and classified based on IRI severity (no, minimal, mild, moderate, and severe). Of the 506 grafts, 87.4% had IRI (no: 12.6%, minimal: 38.1%, mild: 35.4%, moderate: 13.0%, and severe: 0.8%). IRI severity correlated with the incidence of EAD and graft survival at 6 months. Longer cold/warm ischemia time, recipient/donor hypertension, and having a male donor were identified as independent risk factors for moderate to severe IRI. Among 70 grafts with moderate to severe IRI, 42.9% of grafts developed EAD, and grafts with EAD had significantly inferior survival compared to grafts without EAD. Longer cold ischemia time and large droplet macrovesicular steatosis (>= 20%) were identified as independent risk factors for EAD. Our study demonstrated that increased IRI severity was correlated with inferior short-term graft outcomes. Careful consideration of IRI risk factors during donor-recipient matching may assist in optimizing graft utilization and LT outcomes. Furthermore, identification of risk factors of IRI-associated EAD may guide patient management and possible timely graft replacement.
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