8-Hydroxydeoxyguanosine as a biomarker of oxidative DNA damage in workers exposed to low-dose benzene

Publication date: Available online 31 May 2017 Source:Toxicology Reports Author(s): Concettina Fenga, Silvia Gangemi, Michele Teodoro, Venerando Rapisarda, Kirill Golokhvast, Anca Docea, Aristidis M. Tsatsakis, Chiara Costa The present study aims to investigate the relation between exposure to low-dose benzene and the occurrence of oxidative DNA damage in gasoline station workers, as well as the possible role of interfering or confounding factors. Urine levels of 8-OHdG were evaluated by a competitive immunoassay in a group of 80 men, employed in gasoline stations located in East Sicily and compared with a control group (n=63) of male office employees not occupationally exposed to benzene. Information regarding socio-demographic characteristics, lifestyle and job-related records were provided through a questionnaire. Significantly higher (p<0.05) urinary t,t,-MA and 8-OHdG levels were observed in gasoline station attendants compared to subjects not exposed to benzene. Pearson’s test demonstrated a strong correlation (r=0.377, p<0.001) between 8-OHdG and benzene exposure level. 8-OHdG significantly correlated also with job seniority, (r=0.312, p<0.01), whereas the relation with age resulted weaker (r=0.242, p<0.05). Multiple linear regression analysis, performed to exclude a role for confounding factors, showed that variables like gender, smoking habit, alcohol consumption and BMI did not have a significant influence on the measured biom...
Source: Toxicology Reports - Category: Toxicology Source Type: research