title: A brain-derived neurotrophic factor haplotype is associated with therapeutic response in obsessive-compulsive disorder.
abstract: BACKGROUND
  Several clinical and genetic studies have focused on the role of brain-derived neurotrophic factor (BDNF) in the pathophysiology of various mental disorders. Recent lines of evidence regarding the network hypothesis of treatment outcome point towards the involvement of BDNF variants in the pharmacologic response in mood disorders (MD). Furthermore, there is strong evidence of a role for the serotonergic system in the pathophysiology and treatment of OCD, and upregulation of BDNF has been observed with various classes of antidepressants, including selective serotonin reuptake inhibitors (SSRI). Thus, we hypothesized that the BDNF gene might also be associated with treatment outcome in OCD.
  
  
  METHODS
  We performed a single-marker and haplotype association study of eight tag single nucleotide polymorphisms in the BDNF genomic region and related this to pharmacologic response in a sample of 131 OCD patients.
  
  
  RESULTS
  We found an association for a haplotype containing two single nucleotide polymorphisms that have previously been reported to be associated with treatment outcome in MD (rs908867 and rs1491850).
  
  
  CONCLUSIONS
  Our results support the hypothesis that the BDNF gene is involved in the response to psychopharmacologic treatment even though these preliminary findings await replication in a follow-up sample.
authors: OCD Clinical and Research Unit, Instituto de Salud Carlos III, Department of Psychiatry, Bellvitge University Hospital, Barcelona, Spain.
authors: Eva
authors: E
authors: Real
authors: Mònica
authors: M
authors: Gratacòs
authors: Virginia
authors: V
authors: Soria
authors: Geòrgia
authors: G
authors: Escaramís
authors: Pino
authors: P
authors: Alonso
authors: Cinto
authors: C
authors: Segalàs
authors: Mònica
authors: M
authors: Bayés
authors: Rafael
authors: R
authors: de Cid
authors: José M
authors: JM
authors: Menchón
authors: Xavier
authors: X
authors: Estivill
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000928:Antidepressive Agents / Q000627:therapeutic use*; D019208:Brain-Derived Neurotrophic Factor / Q000235:genetics*; D004305:Dose-Response Relationship, Drug; D005260:Female; D005500:Follow-Up Studies; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006239:Haplotypes; D006801:Humans; D008297:Male; D008875:Middle Aged; D009771:Obsessive-Compulsive Disorder / Q000188:drug therapy* / Q000235:genetics*; D016017:Odds Ratio; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D011569:Psychiatric Status Rating Scales; D012720:Severity of Illness Index; D055815:Young Adult
chemical_list: D000928:Antidepressive Agents; D019208:Brain-Derived Neurotrophic Factor