PIN1 promoter polymorphisms are associated with Alzheimer's disease

L. Segat, A. Pontillo, G. Annoni, D. Trabattoni, C. Vergani, M. Clerici, B. Arosio, S. Crovella

Research output: Contribution to journalArticlepeer-review


In our study, we analyzed the coding and promoter regions of the PIN1 gene in a group of 111 Alzheimer's disease (AD) patients looking for a possible genotype-phenotype correlation. The presence of SNPs - which could affect and modify the clinical phenotype of AD patients was also investigated. We identified two single nucleotide polymorphisms (SNPs) at positions -842 (G → C) and -667 (C → T) in the promoter region of the PIN1 gene. Our results evidenced a significantly higher percentage of -842C allele carriers in AD subjects with respect to healthy controls. We found that this allele significantly raised the risk of developing AD (OR 3.044, CI 1.42-6.52). The -842 and -667 SNPs were in linkage disequilibrium and combined to form haplotypes. The CC haplotype conferred a higher risk of developing AD (OR 2.95, confidence interval 1.31-6.82). Finally, protein expression analyses revealed that subjects carrying the -842 CC genotype or the CC haplotype showed reduced levels of the PIN1 protein in peripheral mononuclear cells.

Original languageEnglish
Pages (from-to)69-74
Number of pages6
JournalNeurobiology of Aging
Issue number1
Publication statusPublished - Jan 2007


  • Alzheimer's disease
  • Genetic polymorphisms
  • Genotype-phenotype correlation
  • Neurofibrillary degeneration
  • PIN1

ASJC Scopus subject areas

  • Clinical Neurology
  • Biological Psychiatry
  • Developmental Neuroscience
  • Neurology
  • Psychology(all)


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