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- W1995086474 abstract "This study was aimed at defining the reference ranges for biomarkers of oxidized guanine in (2'-deoxy)ribonucleotides and nucleic acids from a large Italian sample. We recruited 300 healthy subjects (150 males; mean age 44.1±13.6years; 26% smokers) without any known exposure to occupational oxidizing agents. They were asked to provide a spot urine sample, on which the following markers were determined by liquid chromatography-tandem mass spectrometry: 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodGuo), 8-oxo-7,8-dihydroguanosine (8-oxoGuo), 8-oxo-7,8-dihydroguanine (8-oxoGua), and cotinine. The reference ranges, estimated as the 5th-95th percentiles of creatinine-normalized values (pmol/μmol(creat)) were 0.7-4.2, 0.9-4.7, and 5.6-120.7 for 8-oxodGuo, 8-oxoGuo, and 8-oxoGua, respectively. Oxidation biomarkers were correlated with one another (p<0.005) and with urinary creatinine (p<0.0001). Males excreted significantly higher concentrations of 8-oxoGua than females (p<0.0001). 8-OxoGua and 8-oxoGuo showed a positive association with age (p<0.001), also after stratification by gender. Multiple linear regression models including urinary creatinine concentration, age, and smoking habit as independent variables showed a significant effect of age, but not of smoking, on the levels of 8-oxoGuo in males (p<0.0001) and of both 8-oxoGuo and 8-oxoGua in females (p<0.0001). A preliminary assessment in a small group (n=25) of patients affected by advanced non-small-cell lung cancer and receiving platinum-based chemotherapy showed significantly higher values of both 8-oxoGuo and 8-oxodGuo (p<0.0001 for both) compared to the referent population." @default.
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- W1995086474 date "2011-01-01" @default.
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- W1995086474 title "Reference ranges of urinary biomarkers of oxidized guanine in (2′-deoxy)ribonucleotides and nucleic acids" @default.
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- W1995086474 doi "https://doi.org/10.1016/j.freeradbiomed.2010.11.009" @default.
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