Blood serum levels of selected biomarkers of oxidative stress among printing workers occupationally exposed to low-levels of toluene and xylene

被引:0
|
作者
Haghighi, Javid Dehghan [1 ]
Hormozi, Maryam [2 ]
Payandeh, Abolfazl [3 ]
机构
[1] Zahedan Univ Med Sci, Sch Med, Dept Community Med, Zahedan, Iran
[2] Zahedan Univ Med Sci, Hlth Promot Res Ctr, Sch Hlth, Dept Occupat Hlth, Zahedan, Iran
[3] Zahedan Univ Med Sci, Infect Dis & Trop Med Res Ctr, Sch Hlth, Resistant TB Inst,Dept Biostat & Epidemiol, Zahedan, Iran
关键词
Occupational exposure; toluene; xylene; oxidative stress; printing workers; antioxidants; ACID; MARKERS; DAMAGE; HSP70;
D O I
10.1177/07482337221092501
中图分类号
R1 [预防医学、卫生学];
学科分类号
1004 ; 120402 ;
摘要
Printing workers (PWs) are exposed to a mixture of solvents, yet the health risks associated with such exposuer are unknown. This study aimed to compare the serum levels of selected biomarkers of oxidative stress among occupationally exposed PWs to low-level of toluene and xylenes and unexposed controls. Associations between levels of such biomarkers and occupational exposures to toluene and xylene were also investigated. Urinary levels of hippuric acid (HA) and methyl hippuric acids (MHAs) as exposure biomarkers of toluene and xylenes, respectively, and serum levels of oxidative stress biomarkers, including total antioxidant capacity (TAC), malondialdehyde (MDA), and the antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx), were measured among the 84 subjects, comprising 44 PWs and 40 unexposed subjects. Mean concentrations of urinary HA and MHAs of PWs showed a significant increase compared with the unexposed controls. Although levels of urinary biomarkers of exposure to toluene (HA) and xylenes (MHAs) were well below the biological exposure indices (BEIs; ACGHI), PWs presented significantly increased serum levels of MDA, and significantly decreased serum activities of SOD and GPx compared to the unexposed controls. However, for serum TAC and CAT activity, no significant difference was observed between the two groups. Correlation analyses indicated that urinary levels of HA and MHAs were positively correlated with MDA levels and negatively correlated with GPx and SOD. Our study suggested that the alterations evidenced in serum levels of MDA, SOD, and GPx could be involved in the oxidative stress caused by co-exposure to low levels of toluene and xylene. Further investigation is needed to clarify the effect of low-level occupational exposure to solvents among PWs.
引用
收藏
页码:299 / 307
页数:9
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