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Bile proteome reveals biliary regeneration during normothermic preservation of human donor livers
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Bile proteome reveals biliary regeneration during normothermic preservation of human donor livers
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Bile proteome reveals biliary regeneration during normothermic preservation of human donor livers
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Journal Article
Bile proteome reveals biliary regeneration during normothermic preservation of human donor livers
2023
Overview
Normothermic machine perfusion (NMP) after static cold storage is increasingly used for preservation and assessment of human donor livers prior to transplantation. Biliary viability assessment during NMP reduces the risk of post-transplant biliary complications. However, understanding of molecular changes in the biliary system during NMP remains incomplete. We performed an in-depth, unbiased proteomics analysis of bile collected during sequential hypothermic machine perfusion, rewarming and NMP of 55 human donor livers. Longitudinal analysis during NMP reveals proteins reflective of cellular damage at early stages, followed by upregulation of secretory and immune response processes. Livers with bile chemistry acceptable for transplantation reveal protein patterns implicated in regenerative processes, including cellular proliferation, compared to livers with inadequate bile chemistry. These findings are reinforced by detection of regenerative gene transcripts in liver tissue before machine perfusion. Our comprehensive bile proteomics and liver transcriptomics data sets provide the potential to further evaluate molecular mechanisms during NMP and refine viability assessment criteria.
Normothermic machine perfusion (NMP) is increasingly used for preserving and evaluating donor livers before transplantation. Here, the authors demonstrate increased regenerative protein profiles in the bile of perfused livers considered suitable for transplantation, providing insight into the mechanisms linked to recovery of the biliary tree following ischemia-reperfusion injury.
