Chronic arsenic exposure and urinary 8-hydroxy-2'-deoxyguanosine in an arsenic-affected area in Inner Mongolia, China.
OBJECTIVE
Recent studies have shown that generation of reactive oxidants during arsenic metabolism can play an important role in arsenic-induced injury. The purpose of this study was to examine the relationship between arsenic in drinking water and oxidative stress in humans by measuring 8-Hydroxy-2'-deoxyguanosine (8-OHdG).


METHODS
We performed a cross-sectional study in an arsenic-affected village in Hetao Plain, Inner Mongolia, China. A total of 134 of the 143 inhabitants (93.7%) of the village participated in the study. The levels of 8-OHdG, arsenic and its metabolites were measured in urine collected from the participants. Regression analyses were performed to investigate the relationship between arsenic species and 8-OHdG levels in urine.


RESULTS
In the polluted village, monomethylarsenic was significantly higher in subjects with arsenic dermatosis than those without dermatosis despite no difference in mean levels of arsenic in well water between both types of subject. For subjects with arsenic dermatosis, arsenic species and metabolites in urine are significantly associated with 8-OHdG, while there was no statistically significant relationship for subjects without arsenic dermatosis. For all residents of the polluted village, the levels of dimethylarsenic and 8-OHdG were significantly higher for those who had been exposed to well water for more than 12 years.


CONCLUSIONS
These results provide evidence of a link between exposure to arsenic from drinking water and oxidative stress, which may play an important role in arsenic-involved injuries.
Fujino
Yoshihisa
Y
Department of Clinical Epidemiology, Institute of Industrial Ecological Science, University of Occupational and Environmental Health, Japan.
Guo
Xiaojuan
X
Liu
Jun
J
Matthews
Ian P
IP
Shirane
Kiyoyumi
K
Wu
Kegong
K
Kasai
Hiroshi
H
Miyatake
Munetoshi
M
Tanabe
Kimiko
K
Kusuda
Tetsuya
T
Yoshimura
Takesumi
T
D000080242:8-Hydroxy-2'-Deoxyguanosine; D000293:Adolescent; D000328:Adult; D000368:Aged; D001151:Arsenic / Q000032:analysis*; D020261:Arsenic Poisoning / Q000503:physiopathology*; D002681:China; D003430:Cross-Sectional Studies; D003849:Deoxyguanosine / Q000031:analogs & derivatives* / Q000652:urine*; D004781:Environmental Exposure; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D017382:Reactive Oxygen Species; D012424:Rural Population; D012871:Skin Diseases / Q000139:chemically induced; D014881:Water Supply
D017382:Reactive Oxygen Species; D000080242:8-Hydroxy-2'-Deoxyguanosine; D003849:Deoxyguanosine; D001151:Arsenic