title: Oxypurine and purine nucleoside concentrations in renal vein of allograft are potential markers of energy status of renal tissue.
abstract: BACKGROUND
  Impairment of organ function derived from ischemia-reperfusion injury is an important problem in solid organ transplantation. Cell alterations induced by ischemia prime the tissue for subsequent damage that occurs during the reperfusion phase. Purine nucleosides and oxypurines are products of adenine nucleotides degradation. Reperfusion and reoxygenation are accompanied by production of reactive oxygen species and free radicals, which lead to damage of graft tissue. The aim of this study was to measure concentrations of adenine nucleotides and their metabolites in renal allograft vein as well as in recipient's peripheral veins during the reperfusion period and to evaluate their usefulness as markers of tissue metabolism in kidney allografts.
  
  
  METHODS
  The study enrolled 20 renal transplant recipients. The first blood sample was taken from the recipient's ulnar vein before anastomosing of the kidney graft's vessels with recipient's iliac vessels. Samples were then taken from the renal allograft and ulnar veins 5 min after total graft reperfusion measured with an infrared camera. High-performance liquid chromatography (HPLC) was performed to measure whole blood and plasma concentrations of adenosine triphosphate (ATP), adenosine monophosphate (AMP), guanosine (Guo), inosine (Ino), hypoxanthine (Hyp), xanthine (Xan), uric acid (UA), and uridine (Urd).
  
  
  RESULTS
  Hyp and Xan concentrations were significantly increased in renal allograft vein after reperfusion as compared with peripheral vein during the pre- and post-reperfusion periods.
  
  
  CONCLUSIONS
  The results of the present study suggest that differences in Hyp and Xan concentrations between renal and peripheral veins reflect metabolic alterations in renal tissue during reperfusion and may be useful for graft function monitoring during reperfusion.
authors.affiliation: Department of Nephrology, Transplantology and Internal Medicine, Pomeranian Medical University, Szczecin, Poland. domanle@sci.pam.szczecin.pl
authors.forename: Leszek
authors.initials: L
authors.lastname: Domański
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Safranow
authors.forename: Marek
authors.initials: M
authors.lastname: Ostrowski
authors.forename: Andrzej
authors.initials: A
authors.lastname: Pawlik
authors.forename: Maria
authors.initials: M
authors.lastname: Olszewska
authors.forename: Grazyna
authors.initials: G
authors.lastname: Dutkiewicz
authors.forename: Kazimierz
authors.initials: K
authors.lastname: Ciechanowski
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000097:blood; D002102:Cadaver; D005260:Female; D006801:Humans; D019271:Hypoxanthine / Q000097:blood*; D007668:Kidney / Q000098:blood supply / Q000378:metabolism* / Q000473:pathology; D016030:Kidney Transplantation; D008297:Male; D008875:Middle Aged; D011684:Purine Nucleosides / Q000097:blood; D012082:Renal Veins; D015427:Reperfusion Injury / Q000378:metabolism* / Q000473:pathology; D014019:Tissue Donors; D014184:Transplantation, Homologous; D019820:Xanthine / Q000097:blood*
chemical_list: D015415:Biomarkers; D011684:Purine Nucleosides; D019820:Xanthine; D019271:Hypoxanthine