title: Blood 8-hydroxy-2'-deoxyguanosine is associated with erythropoietin resistance in haemodialysis patients.
abstract: BACKGROUND
  8-Hydroxy-2'-deoxyguanosine (8-OHdG), a product of oxidized DNA, is increased in haemodialysis (HD) patients, but the clinical relevance of enhanced 8-OHdG production in these patients remains unknown.
  
  
  METHODS
  We cross-sectionally measured serum 8-OHdG in 73 patients on maintenance HD (age 68+/-2 years, time on HD 85+/-11 months, male/female=42/31), and examined the relationship between blood 8-OHdG and the severity of renal anaemia and the weekly dosage of recombinant human erythropoietin (rHuEPO).
  
  
  RESULTS
  There was a significant increase in serum 8-OHdG in HD patients compared with normal subjects. Serum 8-OHdG was positively correlated with the patients' age (r=0.231, P<0.05) but not with the duration of HD. Serum 8-OHdG was significantly higher in diabetic subjects than in non-diabetic subjects (P<0.05). Serum 8-OHdG had a significant inverse correlation with haemoglobin (Hb) (r=-0.526, P<0.01) but a positive correlation with the rHuEPO dose (r=0.443, P<0.01) and the ratio of the weekly rHuEPO dose divided by Hb (r=0.487, P<0.01). Serum 8-OHdG was not correlated with inflammatory and nutritional parameters.
  
  
  CONCLUSIONS
  These findings suggest that the elevation of circulating 8-OHdG may be associated, at least in part, with rHuEPO resistance in HD patients.
authors.affiliation: Division of Nephrology, Endocrinology and Metabolism, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan. a.kato@scchr.jp
authors.forename: Akihiko
authors.initials: A
authors.lastname: Kato
authors.forename: Mari
authors.initials: M
authors.lastname: Odamaki
authors.forename: Akira
authors.initials: A
authors.lastname: Hishida
mesh_terms: D000080242:8-Hydroxy-2'-Deoxyguanosine; D000368:Aged; D000740:Anemia / Q000097:blood / Q000188:drug therapy / Q000209:etiology; D003430:Cross-Sectional Studies; D003849:Deoxyguanosine / Q000031:analogs & derivatives* / Q000097:blood*; D004351:Drug Resistance; D004921:Erythropoietin / Q000008:administration & dosage / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000097:blood / Q000628:therapy; D008297:Male; D008875:Middle Aged; D010084:Oxidation-Reduction; D018384:Oxidative Stress; D011994:Recombinant Proteins; D006435:Renal Dialysis / Q000009:adverse effects
chemical_list: D011994:Recombinant Proteins; D004921:Erythropoietin; D000080242:8-Hydroxy-2'-Deoxyguanosine; D003849:Deoxyguanosine