The role of the BDNF Val66Met polymorphism in individual differences in long-term memory capacity

J Mol Neurosci. 2014 Dec;54(4):796-802. doi: 10.1007/s12031-014-0417-1. Epub 2014 Sep 30.

Abstract

The protein brain-derived neurotrophic factor (BDNF) plays an important role in diverse memory processes and is strongly expressed in the hippocampus. The hippocampus itself is a key structure involved in the processing of information from short-term to long-term memory. Due to the putative role of BDNF in memory consolidation, a prominent single nucleotide polymorphism (SNP) on the BDNF gene (BDNF Val66Met) was investigated in the context of long-term memory performance. N=138 students were presented with 40 words from 10 categories, each consisting of eight words such as 'fruits' or 'vehicles' in a memory recognition task (specifically the Deese-Roediger-McDermott Paradigm). Recognition performance was analyzed 25 min after the initial presentation of the word list and subsequently 1 week after the initial presentation. Overall, individual long-term memory performance immediately after learning the word list (T1) and performance 1 week later (T2) did not differ on the basis of the BDNF SNP, but an interaction effect of BDNF Val66Met by time-of-recall was found: Carriers of the Met66+ variant showed the strongest decline in hit rate performance over time.

MeSH terms

  • Adolescent
  • Adult
  • Brain-Derived Neurotrophic Factor / genetics*
  • Female
  • Humans
  • Male
  • Memory, Long-Term*
  • Mental Recall
  • Middle Aged
  • Polymorphism, Single Nucleotide*
  • Verbal Learning

Substances

  • Brain-Derived Neurotrophic Factor