title: [A case-control study on serum organochlorines residues, genetic polymorphisms of glutathione S-transferase T1 and the risks of breast cancer].
abstract: OBJECTIVE
  To study the potential effect of gene-environment interaction between glutathione S-transferase T1 (GSTT1) and serum organochlorines residues on the risk of breast cancer in women, in China.
  
  
  METHODS
  70 newly diagnosed female breast cancer patients and 30 controls from September 2006 to October 2007 were interviewed using the same questionnaire to obtain information regarding exposure to those risks. Organochlorine residues level in serum was measured by gas chromatography (GC). Genotypes of GSTT1 polymorphisms were analyzed by multiplex allele-specific polymerase chain reaction (PCR). Interaction indexes (gamma) were calculated to determine the type of gene-environment interaction.
  
  
  RESULTS
  After adjusting the confounding factors, results showed that interaction existed in genetic polymorphisms of GSTT1 and dichlorodiphenyltrichloroethane (DDT)/hexachlorocyclohexane (HCH) residues, with interaction indexes (gamma) value as 1.352 and 1.528.
  
  
  CONCLUSIONS
  Genetic and environmental hazard factors had a co-effect on the development of breast cancer while genetic polymorphisms of GSTT1 and DDT/HCH expressed an interaction to breast cancer.
authors.affiliation: Department of Epidemiology of North China Coal Medical University, Tangshan 063000, China.
authors.forename: Yong-li
authors.initials: YL
authors.lastname: Chang
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: San-qiao
authors.initials: SQ
authors.lastname: Yao
authors.forename: Wan-ning
authors.initials: WN
authors.lastname: Hu
authors.forename: Shou-fang
authors.initials: SF
authors.lastname: Jiang
authors.forename: Zhong
authors.initials: Z
authors.lastname: Guo
authors.forename: Li
authors.initials: L
authors.lastname: Yang
authors.forename: Dan-dan
authors.initials: DD
authors.lastname: Li
authors.forename: Ya-mei
authors.initials: YM
authors.lastname: Li
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
mesh_terms: D001943:Breast Neoplasms / Q000097:blood / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D005982:Glutathione Transferase / Q000235:genetics*; D001556:Hexachlorocyclohexane / Q000097:blood; D006801:Humans; D006843:Hydrocarbons, Chlorinated / Q000097:blood*; D010573:Pesticide Residues / Q000097:blood*; D011110:Polymorphism, Genetic; D012307:Risk Factors
chemical_list: D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues; D001556:Hexachlorocyclohexane; C413545:glutathione S-transferase T1; D005982:Glutathione Transferase