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- W2074597412 abstract "There is good evidence that oxidative DNA damage permanently occurs in living cells. The oxidative DNA damage product 8-hydroxy-2'-deoxyguanosine (8-OHdG) is one of the predominant forms of radical-induced lesions to DNA, and has therefore been widely used as a biomarker for oxidative stress, either in cellular DNA or as DNA repair product in urine. In this paper we describe the use of a high-performance liquid chromatographic procedure with electrochemical detection for the measurement of urinary 8-OHdG. Our study has addressed the questions (i) of baseline urinary levels of 8-OHdG in spot urine and 24-h urine, (ii) of inter- and intra-individual variation of this biomarker, and (iii) of confounding factors for the excretion of 8-OHdG. No significant difference between the mean group levels of 8-OHdG/creatinine in spot urine (2.03+/-1.21 micromol/mol, n=148) and in 24-h urine (1.86+/-1.09 micromol/mol, n=67) was observed. However, when only 24-h urine was used for analysis, 8-OHdG was found to be statistically significantly higher in smokers. By multiple linear regression analysis, urinary creatinine was identified as the only predictor of 8-OHdG/24 h (r(p)=0.33, P=0.007). High intra-individual coefficients of variation of 8-OHdG/24 h were observed in two healthy subjects over a period of 10 consecutive days (37 and 57%, respectively), indicating that the intra-individual fluctuation of urinary 8-OHdG has so far been underestimated. Therefore, we suggest that single values of 8-OHdG should be considered with caution, in particular in small study groups and when spot urine is used." @default.
- W2074597412 created "2016-06-24" @default.
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- W2074597412 date "2002-10-01" @default.
- W2074597412 modified "2023-10-07" @default.
- W2074597412 title "Urinary excretion of 8-hydroxy-2′-deoxyguanosine measured by high-performance liquid chromatography with electrochemical detection" @default.
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- W2074597412 doi "https://doi.org/10.1016/s0378-4347(01)00449-2" @default.
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