title: [Association between polymorphism of BDNF and internalizing disorders].
abstract: OBJECTIVE
  To investigate the genetic association between brain-derived neurotrophic factor (BDNF) gene polymorphism and internalizing disorders, to provide the theoretical basis to explore the etiology of internalizing disorders.
  
  
  METHODS
  PCR-based ligase detection reaction (PCR-LDR) was applied to tag single nucleotide lengh polymorphism (SNPs) of BDNF gene among 259 undergraduates affected by internalizing disorders and 269 healthy undergraduates. Haplotype analysis and multiple locus analysis were conducted to analyze the genotyping data.
  
  
  RESULTS
  The genotypic frequency of tag SNPs of BDNF gene did not deviate from Hardy-Weinberg equilibrium in both case and control groups. Rs12273539 was not associated with internalizing disorders (P > 0.05), but rs10835210 and rs2030324 were related to internalizing disorders (P < 0.05). The case group had more A allele of rs10835210 and C allele of rs2030324 when compared to the controls while A allele of rs10835210 and C allele of rs2030324 seemed to be the risk factors of internalizing disorder (OR = 1.877, P < 0.001; OR = 1.347, P < 0.05). Results of multiple locus analysis showed that the haplotype composed by the three tag SNPs which was related to internalizing disorders (chi(2) = 23.537, P < 0.001).
  
  
  CONCLUSIONS
  BDNF gene might serve as the susceptible gene for internalizing disorder.
authors.affiliation: Department of Epidemiology and Health Statistics, Research Center for Genomic Medicine, School of Public Health, Jilin University, Changchun 130021, China.
authors.forename: Xiang-fei
authors.initials: XF
authors.lastname: Meng
authors.forename: Chang-gui
authors.initials: CG
authors.lastname: Kou
authors.forename: Jie-ping
authors.initials: JP
authors.lastname: Shi
authors.forename: Ya-qin
authors.initials: YQ
authors.lastname: Yu
authors.forename: Yue-qin
authors.initials: YQ
authors.lastname: Huang
mesh_terms: D000328:Adult; D000483:Alleles; D019208:Brain-Derived Neurotrophic Factor / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000209:etiology / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D012307:Risk Factors; D055815:Young Adult
chemical_list: D019208:Brain-Derived Neurotrophic Factor