title: The brain-derived neurotrophic factor rs6265 (Val66Met) polymorphism and depression in Mexican-Americans.
abstract: The hypothesis that brain-derived neurotrophic factor (BDNF) is involved in the pathogenesis of major depression is supported by several research findings; however, genetic studies assessing the relationship between BDNF and psychiatric disorders have produced conflicting results. We examined the effect of a BDNF polymorphism on depression susceptibility in Mexican-Americans. The single nucleotide polymorphism (Val66Met), which has been shown to have functional and behavioral effects, was genotyped in 284 depressed participants and 331 controls, showing association with depression (P=0.005). Individuals homozygous for the major allele (GG) had an increased chance of being depressed (OR=1.7 95% CI 1.17-2.47). Our findings support the association of BDNF single nucleotide polymorphism rs6265 and depression, suggesting that this polymorphism may increase susceptibility to major depression in Mexican-Americans.
authors.affiliation: Department of Psychiatry & Behavioral Sciences, Center on Pharmacogenomics, University of Miami Miller School of Medicine, Miami, Florida 33136-1013, USA. lribeiro@med.miami.edu
authors.forename: Luciana
authors.initials: L
authors.lastname: Ribeiro
authors.forename: João V
authors.initials: JV
authors.lastname: Busnello
authors.forename: Rita M
authors.initials: RM
authors.lastname: Cantor
authors.forename: Fiona
authors.initials: F
authors.lastname: Whelan
authors.forename: Pamela
authors.initials: P
authors.lastname: Whittaker
authors.forename: Panos
authors.initials: P
authors.lastname: Deloukas
authors.forename: Ma-Li
authors.initials: ML
authors.lastname: Wong
authors.forename: Julio
authors.initials: J
authors.lastname: Licinio
mesh_terms: D000328:Adult; D019943:Amino Acid Substitution / Q000235:genetics; D001921:Brain / Q000378:metabolism / Q000503:physiopathology; D001923:Brain Chemistry / Q000235:genetics*; D019208:Brain-Derived Neurotrophic Factor / Q000737:chemistry / Q000235:genetics*; D004252:DNA Mutational Analysis; D003866:Depressive Disorder / Q000208:ethnology* / Q000235:genetics* / Q000378:metabolism; D005260:Female; D005787:Gene Frequency / Q000235:genetics; D005819:Genetic Markers / Q000235:genetics; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005820:Genetic Testing; D005838:Genotype; D006720:Homozygote; D006801:Humans; D008297:Male; D008715:Methionine / Q000235:genetics; D017058:Mexican Americans / Q000208:ethnology / Q000235:genetics*; D008875:Middle Aged; D011110:Polymorphism, Genetic / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D014633:Valine / Q000235:genetics
chemical_list: D019208:Brain-Derived Neurotrophic Factor; D005819:Genetic Markers; D008715:Methionine; D014633:Valine