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Novel strategy to decrease reperfusion injuries and improve function of cold-preserved livers using normothermic ex

Babak Banan1, Zhenyu Xiao1, Rao Watson2,3

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Liver Transplantation : Official Publication of the American Association for the Study of Liver Diseases and the International Liver Transplantation Society
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Summary
This summary is machine-generated.

Gradual rewarming of cold-preserved livers before normothermic extracorporeal liver perfusion (NELP) minimizes damage. This protocol reduces hepatocellular damage, Kupffer cell activation, and endothelial cell dysfunction, improving organ viability.

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Area of Science:

  • Organ transplantation
  • Hepatology
  • Surgical research

Background:

  • Normothermic extracorporeal liver perfusion (NELP) is crucial for minimizing ischemia/reperfusion injury.
  • Cold storage of donor livers is necessary but can cause cellular damage.
  • Optimizing preservation and rewarming strategies is vital for successful liver transplantation.

Purpose of the Study:

  • To evaluate the efficacy of gradual rewarming protocols for cold-stored livers prior to NELP.
  • To assess the impact of rewarming on hepatocellular integrity, sinusoidal endothelial cells, and Kupffer cells.
  • To determine if gradual rewarming can mitigate reperfusion injury in NELP.

Main Methods:

  • Porcine livers were divided into three groups: immediate NELP, cold storage followed by NELP, and cold storage with gradual rewarming before NELP.
  • Livers underwent 4 hours of cold storage (except immediate NELP group) followed by 4 hours of NELP.
  • Evaluation focused on liver enzymes, hyaluronic acid, bile production, and cellular damage markers.

Main Results:

  • Immediate NELP showed the lowest liver transaminases, hyaluronic acid, and β-galactosidase, with highest bile production.
  • Gradual rewarming significantly reduced hyaluronic acid and β-galactosidase compared to cold NELP alone.
  • Rewarming improved international normalized ratio, bile production, and reduced biliary epithelial cell damage.

Conclusions:

  • Gradual rewarming of cold-preserved livers before NELP is a viable strategy to reduce reperfusion injury.
  • This protocol mitigates hepatocellular damage, Kupffer cell activation, and sinusoidal endothelial cell dysfunction.
  • Gradual rewarming offers a promising approach when immediate NELP is not feasible, enhancing organ preservation.