Metabolic differences between cold stored and machine perfused porcine kidneys: A 1H NMR based study

Jay Nath, Thomas Smith, Kamlesh Patel, Sam R. Ebbs, Alex Hollis, Daniel Tennant, Christian Ludwig, Andrew R. Ready

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
220 Downloads (Pure)


Hypothermic machine perfusion (HMP) and static cold storage (SCS) are the two methods used to preserve deceased donor kidneys prior to transplant. This study seeks to characterise the metabolic profile of HMP and SCS porcine kidneys in a cardiac death donor model. Twenty kidneys were cold flushed and stored for two hours following retrieval. Paired kidneys then underwent 24 h of HMP or SCS or served as time zero controls. Metabolite quantification in both storage fluid and kidney tissue was performed using one dimensional 1H NMR spectroscopy. For each metabolite, the net gain for each storage modality was determined by comparing the total amount in each closed system (i.e. total amount in storage fluid and kidney combined) compared with controls. 26 metabolites were included for analysis. Total system metabolite quantities following HMP or SCS were greater for 14 compared with controls (all p < 0.05). In addition to metabolic differences with control kidneys, the net metabolic gain during HMP was greater than SCS for 8 metabolites (all p < 0.05). These included metabolites related to central metabolism (lactate, glutamate, aspartate, fumarate and acetate). The metabolic environments of both perfusion fluid and the kidney tissue are strikingly different between SCS and HMP systems in this animal model. The total amount of central metabolites such as lactate and glutamate observed in the HMP kidney system suggests a greater degree of de novo metabolic activity than in the SCS system. Maintenance of central metabolic pathways may contribute to the clinical benefits of HMP.
Original languageEnglish
Early online date3 Dec 2016
Publication statusE-pub ahead of print - 3 Dec 2016


  • Hypothermic machine perfusion
  • Kidney
  • Transplantation
  • Metabolism
  • NMR
  • Organ preservation


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