Differential expression of α-synuclein isoforms in dementia with Lewy bodies

K. Beyer, J. I. Lao, C. Carrato, J. L. Mate, D. López, I. Ferrer, Aurelio Ariza

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58 Citations (Scopus)


Dementia with Lewy bodies (DLB) is characterized by the widespread presence of Lewy bodies (LBs) in the brain. α-Synuclein, the main component of LBs, is expressed as two main isoforms (112 and 140), but little is known about their differential expression in the brain. We compared α-synuclein 112 and α-synuclein 140 expression levels in the prefrontal cortices of six DLB patients, eight Alzheimer disease (AD) patients, and six control subjects. Relative α-synuclein 112 and α-synuclein 140 expression levels were determined by real-time polymerase chain reaction with competimer technology using a LightCycler System. Whereas total α-synuclein levels were just marginally elevated in DLB in comparison with the other groups, α-synuclein 112 was seen to be markedly increased in DLB compared with AD cases and controls. In contrast, α-synuclein 140 levels were significantly diminished in both neurodegenerative disorders in comparison with controls. These results show differential overexpression of α-synuclein 112 in DLB, a finding that could be of importance in DLB pathogenesis.
Original languageEnglish
Pages (from-to)601-607
JournalNeuropathology and Applied Neurobiology
Issue number6
Publication statusPublished - 1 Dec 2004


  • Alpha-synuclein isoforms
  • Alzheimer disease
  • Competimer technology
  • Dementia with Lewy bodies
  • mRNA expression


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