Risk and protective haplotypes of the alpha-synuclein gene associated with Parkinson's disease differentially affect cognitive sequence learning

S. Kéri, H. Nagy, C. E. Myers, G. Benedek, D. Shohamy, M. A. Gluck

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Alpha-synuclein (SNCA) is a key factor in the regulation of dopaminergic transmission and is related to Parkinson's disease. In this study, we investigated the effects of risk and protective SNCA haplotypes associated with Parkinson's disease on cognitive sequence learning in 204 healthy volunteers. We found that the 3′-block risk SNCA haplotypes are associated with less effective stimulus-reward learning of sequences and with superior context representation of sequences. In contrast, participants with protective haplotypes exhibit better stimulus-reward learning and worse context representation, which suggest that these functions are inversely affected by risk and protective haplotypes. The Rep1 promoter polymorphism does not influence cognitive sequence learning. Because stimulus-reward learning may be mediated by the basal ganglia and context learning may be related to the medial temporal lobe, our data raise the possibility that dopaminergic signals regulated by SNCA inversely affect these memory systems.

Original languageEnglish (US)
Pages (from-to)31-36
Number of pages6
JournalGenes, Brain and Behavior
Volume7
Issue number1
DOIs
StatePublished - Feb 2008

All Science Journal Classification (ASJC) codes

  • Neurology
  • Genetics
  • Behavioral Neuroscience

Keywords

  • Alpha-synuclein
  • Cognitive sequence learning
  • Parkinson's disease
  • Reward

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