Polyethylene glycol reduces early and long-term cold ischemia-reperfusion and renal medulla injury.
Ischemia-reperfusion injury (IRI) after transplantation is a major cause of delayed graft function, which has a negative impact on early and late graft function and improve acute rejection. We have previously shown that polyethylene glycol (PEG) and particularly PEG 20M has a protective effect against cold ischemia and reperfusion injury in an isolated perfused pig and rat kidney model. We extended those observations to investigate the role of PEG using different doses (30g or 50g/l) added (ICPEG30 or ICPEG50) or not (IC) to a simplified preservation solution to reduce IRI after prolonged cold storage (48-h) of pig kidneys when compared with Euro-Collins and University of Wisconsin solutions. The study of renal function and medulla injury was performed with biochemical methods and proton NMR spectroscopy. Histological and inflammatory cell studies were performed after reperfusion (30-40 min) and on days 7 and 14 and weeks 4, 8, and 12. Peripheral-type benzodiazepine receptor (PBR), a mitochondrial protein involved in cholesterol homeostasis, was also studied. The results demonstrated that ICPEG30 improved renal function and reduced medulla injury. ICPEG30 also improved tubular function and strongly protect mitochondrial integrity. Post-IRI inflammation was strongly reduced in this group, particularly lymphocytes TCD4(+), PBR expression was influenced by IRI in the early period and during the development of chronic dysfunction. This study clearly shows that PEG has a beneficial effect in renal preservation and suggests a role of PBR as a marker IRI and repair processes.
Unité de Transplantation Expérimentale, Département de Génétique Animale, Institut National de Recherche Agronomique, Domaine du Magneraud, Surgères, and Faculté de Médecine (EA 2426), Poitiers and Centre Hospitalier et Universitaire, Poitiers, France.
Jean Pierre
JP
Faure
Thierry
T
Hauet
Zeqiu
Z
Han
Jean Michel
JM
Goujon
Isabelle
I
Petit
Gerard
G
Mauco
Michel
M
Eugene
Michel
M
Carretier
Vassilios
V
Papadopoulos
D000818:Animals; D003080:Cold Temperature; D019040:E-Selectin / Q000096:biosynthesis / Q000235:genetics; D005786:Gene Expression Regulation / Q000187:drug effects; D005802:Genes, MHC Class II / Q000235:genetics; D007150:Immunohistochemistry; D007677:Kidney Function Tests; D007679:Kidney Medulla / Q000378:metabolism / Q000473:pathology*; D016030:Kidney Transplantation / Q000502:physiology; D009682:Magnetic Resonance Spectroscopy; D009392:Nephrectomy; D010084:Oxidation-Reduction; D011092:Polyethylene Glycols / Q000627:therapeutic use*; D051381:Rats; D015427:Reperfusion Injury / Q000188:drug therapy* / Q000473:pathology*; D013552:Swine; D019010:Vascular Cell Adhesion Molecule-1 / Q000096:biosynthesis / Q000235:genetics
D019040:E-Selectin; D019010:Vascular Cell Adhesion Molecule-1; D011092:Polyethylene Glycols