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Korean Journal of Preventive Medicine 1995;28(2): 511-525.
The effects of chromium exposure on sister chromatid exchange and concentration of 8-hydroxydeoxyguanosine.
Sang Hwan Han, Soo Hun Cho, Heon Kim, Soo Min Park, Mina Ha, Young Soo Joo, Ho Jang Kwon, Yong Dae Kwon, Myung Hee Kwon
To elucidate some DNA adducts as a biological marker for workers of chromate pigment, the effects of chromium exposure on the formation of 8-hydroxydeoxyguanosine(8-OH-dG) and sister chromatid exchanges(SCEs) frequency in 38 workers of a pigment plant in Bucheon which utilized lead chromates, were examined. The chromium contents of venous blood and urine were measured as working environmental exposure level. The concentrations of 8-OH-dG in DNA isolated from lymphocytes were determined with high performance liquid chromatography and electrochemical detector and denoted as a molar ratio of 8-OH-dG to deoxyguanosine(dG). The SCEs frequency were analyzed in DNA isolated from lymphocytes. A significant correlation was found between creatinine adjusted urine chromium concentration and the molar ratio of 8-OH-dG to dG(r=0.47, p<0.01). After adjusting the current smoking habit, the correlation coefficient was increased(r=0.62, p<0.05). However, there was no significant correlation between the SCE frequency and chromium exposure. This significant results between molar ratio of 8-OH-dG to dG and chromium exposure are in good agreement with in vitro studies that support the importance of DNA adduct formation for the carcinogenic effect of chromium.
Key words: chromate pigment; 8-hydroxydeoxyguanosine; sister chromatid exchange
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