title: Chronic arsenic exposure and urinary 8-hydroxy-2'-deoxyguanosine in an arsenic-affected area in Inner Mongolia, China.
abstract: 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.
authors.affiliation: Department of Clinical Epidemiology, Institute of Industrial Ecological Science, University of Occupational and Environmental Health, Japan.
authors.forename: Yoshihisa
authors.initials: Y
authors.lastname: Fujino
authors.forename: Xiaojuan
authors.initials: X
authors.lastname: Guo
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.forename: Ian P
authors.initials: IP
authors.lastname: Matthews
authors.forename: Kiyoyumi
authors.initials: K
authors.lastname: Shirane
authors.forename: Kegong
authors.initials: K
authors.lastname: Wu
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kasai
authors.forename: Munetoshi
authors.initials: M
authors.lastname: Miyatake
authors.forename: Kimiko
authors.initials: K
authors.lastname: Tanabe
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Kusuda
authors.forename: Takesumi
authors.initials: T
authors.lastname: Yoshimura
mesh_terms: 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
chemical_list: D017382:Reactive Oxygen Species; D000080242:8-Hydroxy-2'-Deoxyguanosine; D003849:Deoxyguanosine; D001151:Arsenic