title: [A case-control study on congenital heart diseases with methylenetetrahydrofolate reductase gene, cystathionine beta-synthase gene, and environmental factors].
abstract: OBJECTIVE
  To explore congenital heart diseases (CHD) in their offsprings in association with parental methylenetetrahydrofolate reductase (MTHFR) gene C677T, cystathionine beta-synthase (CBS) gene T833C, and environmental factors.
  
  
  METHODS
  A 1:1 case-control study was carried out to investigate 115 pairs of case and controlled children and their parents, and the parents' MTHFR gene 677 C-->T mutation and CBS gene 833 T-->C mutation were also identified. The possible risk factors were analysed by simple and multiple factors logistic regression methods.
  
  
  RESULTS
  Results revealed that 5 factors were related to the occurrence of CHD in the offsprings: maternal exposures to pesticides in the early stage of pregnancy (OR = 8.62), suffering from diseases during pregnancy (OR = 2.069), catching cold in the early stage of pregnancy (OR = 4.125), under depressed or nervous condition during pregnancy (OR = 4.653), maternal MTHFR 677TT genotype (OR = 3.872).
  
  
  CONCLUSIONS
  These results suggested that maternal MTHFR 677TT genotype was one of the risks to the occurrence of CHD in offspring but parents' CBS gene 833 T-->C mutation did not get involved in CHD. In addition, the occurrence of CHD was related to maternal exposures to pesticides, catching a cold, suffering from diseases, depressed or under nervous condition in the early stage of pregnancy or during pregnancy.
authors.affiliation: Department of Epidemiology and Statistics, Public Health School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
authors.forename: Xiao-qiang
authors.initials: XQ
authors.lastname: Qiu
authors.forename: Qiu-an
authors.initials: QA
authors.lastname: Zhong
authors.forename: Xiao-yun
authors.initials: XY
authors.lastname: Zeng
authors.forename: Yong-hong
authors.initials: YH
authors.lastname: Li
authors.forename: Shao-fa
authors.initials: SF
authors.lastname: Nie
mesh_terms: D016022:Case-Control Studies; D002675:Child, Preschool; D003541:Cystathionine beta-Synthase / Q000235:genetics*; D003863:Depression; D004781:Environmental Exposure; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006331:Heart Diseases / Q000151:congenital*; D006801:Humans; D042965:Methylenetetrahydrofolate Reductase (NADPH2) / Q000235:genetics*; D016017:Odds Ratio; D010575:Pesticides / Q000633:toxicity; D011247:Pregnancy; D011248:Pregnancy Complications; D012307:Risk Factors
chemical_list: D010575:Pesticides; D042965:Methylenetetrahydrofolate Reductase (NADPH2); D003541:Cystathionine beta-Synthase