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Science. 2010 Feb 12;327(5967):863-6. doi: 10.1126/science.1181886. Epub 2010 Jan 14.

A genetic variant BDNF polymorphism alters extinction learning in both mouse and human.

Author information

1
The Sackler Institute for Developmental Psychobiology, Weill Cornell Medical College, New York, NY 10065, USA. fas2002@med.cornell.edu

Abstract

Mouse models are useful for studying genes involved in behavior, but whether they are relevant to human behavior is unclear. Here, we identified parallel phenotypes in mice and humans resulting from a common single-nucleotide polymorphism in the brain-derived neurotrophic factor (BDNF) gene, which is involved in anxiety-related behavior. An inbred genetic knock-in mouse strain expressing the variant BDNF recapitulated the phenotypic effects of the human polymorphism. Both were impaired in extinguishing a conditioned fear response, which was paralleled by atypical frontoamygdala activity in humans. Thus, this variant BDNF allele may play a role in anxiety disorders showing impaired learning of cues that signal safety versus threat and in the efficacy of treatments that rely on extinction mechanisms, such as exposure therapy.

PMID:
20075215
PMCID:
PMC2829261
DOI:
10.1126/science.1181886
[Indexed for MEDLINE]
Free PMC Article

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