title: Association analysis of brain-derived neurotrophic factor (BDNF) gene Val66Met polymorphism in schizophrenia and bipolar affective disorder.
abstract: Brain-derived neurotrophic factor (BDNF) has been implicated in the pathogenesis of schizophrenia and bipolar disorder. A functional polymorphism Val66Met of BDNF gene was studied in patients with schizophrenia (n=336), bipolar affective disorder (n=352) and healthy controls (n=375). Consensus diagnosis by at least two psychiatrists, according to DSM-IV and ICD-10 criteria, was made for each patient using a structured clinical interview for DSM-IV Axis I disorders (SCID). No association was found between the studied polymorphism and schizophrenia or bipolar affective disorder either for genotype or allele distribution (for genotype: p=0.210 in schizophrenia, p=0.400 in bipolar disorder; for alleles: p=0.260 in schizophrenia, p=0.406 in bipolar disorder). Results were also not significant when analysed by gender. For males genotype distribution and allele frequency were (respectively): p=0.480 and p=0.312 in schizophrenia, p=0.819 and p=0.673 in bipolar affective disorder. Genotype distribution and allele frequency observed in the female group were: p=0.258 for genotypes, p=0.482 for alleles in schizophrenia; p=0.432 for genotypes, p=0.464 for alleles in bipolar affective disorder. A subgroup of schizophrenic (n=62) and bipolar affective patients (n=28) with early age at onset (18 years or younger) was analysed (p=0.328 for genotypes, p=0.253 for alleles in schizophrenia; p=0.032 for genotypes, p=0.858 for alleles in bipolar affective disorder).
authors.affiliation: Laboratory of Psychiatric Genetics, Department of Psychiatry, University of Medical Sciences, Poznan, Poland. mariaskibinska@yahoo.com
authors.forename: Maria
authors.initials: M
authors.lastname: Skibinska
authors.forename: Joanna
authors.initials: J
authors.lastname: Hauser
authors.forename: Piotr M
authors.initials: PM
authors.lastname: Czerski
authors.forename: Anna
authors.initials: A
authors.lastname: Leszczynska-Rodziewicz
authors.forename: Magdalena
authors.initials: M
authors.lastname: Kosmowska
authors.forename: Pawel
authors.initials: P
authors.lastname: Kapelski
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Slopien
authors.forename: Marzena
authors.initials: M
authors.lastname: Zakrzewska
authors.forename: Janusz K
authors.initials: JK
authors.lastname: Rybakowski
mesh_terms: D000328:Adult; D000483:Alleles; D001714:Bipolar Disorder / Q000235:genetics*; D019208:Brain-Derived Neurotrophic Factor / Q000235:genetics*; D005260:Female; D015870:Gene Expression / Q000235:genetics*; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic / Q000235:genetics*; D012559:Schizophrenia / Q000235:genetics*
chemical_list: D019208:Brain-Derived Neurotrophic Factor