Dynamic transcriptomic analysis of ischemic injury in a porcine pre-clinical model mimicking donors deceased after circulatory death

Abstract

Présenté au: 18. Annual Congress of the French Speaking Transplantation SocietyToulouse FranceDate: 4 au 7 décembre 2018Introduction: Due to organ shortage, clinicians are prone to consider alternative type of organ donors among them donors deceased after circulatory death (DCD). However, especially using these organs which are more prone to graft dysfunction, there is a need to better understand mechanistic events occurring during ischemia phase and leading to ischemia/reperfusion injuries (IRI). The aim of this study is to provide a dynamic transcriptomic analysis of preclinical porcine model kidneys subjected to ischemic stress mimicking DCD donor.Methods: We compared cortex and corticomedullary junction (CMJ) tissues from porcine kidneys submitting to 60 min warm ischemia (WI) followed by 0, 6 or 24 h of cold storage in University of Wisconsin solution versus control non‐ischemic kidneys (n = 5 per group).Results: 29 cortex genes and 113 CMJ genes were significantly up or down‐regulated after WI versus healthy kidneys, and up to 400 genes were regulated after WI and more 6 or 24 h of cold storage (p < 0.05). Home selected gene kinetic classification, Gene‐ontology‐biological processes and Gene‐ontology‐molecular‐function functional enrichment analysis revealed relevant genes implication during WI and cold storage.Conclusion: We uncovered targets which we will further validate as biomarkers and new therapeutic targets to optimize graft kidney quality before transplantation and improve whole transplantation outcome