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Updated: Jul 14, 2026

Detection of Disease-associated α-synuclein by Enhanced ELISA in the Brain of Transgenic Mice Overexpressing Human A53T Mutated α-synuclein
Published on: May 30, 2015
Single cell transcriptomics reveals enrichment of aggregation-prone alpha-synuclein isoforms across synucleinopathies
Elliot Keats Shwab1,2, Webb Pierson1,2, Daniel C Gingerich1,2
1Division of Translational Brain Sciences, Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA.
Researchers discovered a new alpha-synuclein (α-Syn) protein variant, α-Syn-115, in Parkinson's disease (PD) and dementia with Lewy bodies (DLB). This variant, found in excitatory neurons, may drive disease progression by promoting protein aggregation.
Area of Science:
- Neuroscience
- Genetics
- Molecular Biology
Background:
- Alpha-synuclein (α-Syn) aggregation forms Lewy bodies, characteristic of synucleinopathies like Parkinson's disease (PD) and dementia with Lewy bodies (DLB).
- Previous studies using short-read sequencing identified dysregulated SNCA gene expression in PD and DLB but missed transcript isoform variations.
Purpose of the Study:
- To comprehensively characterize the SNCA transcript isoform landscape in PD and DLB.
- To map the expression of these isoforms to specific cell types and subtypes in affected brain tissues.
Main Methods:
- Combined SNCA-targeted long-read multiplexed arrays isoform sequencing (MAS-Iso-seq) with short-read single nucleus (sn) RNA-seq.
- Analyzed cortical tissues from PD, DLB, and control samples.
Main Results:
- Discovered numerous novel SNCA transcript isoforms with unique splicing patterns and exons.
- Identified an abundant isoform encoding a new α-Syn protein variant, α-Syn-115, with higher detection in excitatory neurons of PD/DLB tissues.
- In silico modeling showed α-Syn-115 has greater aggregation affinity than α-Syn-140, suggesting it may drive disease progression.
Conclusions:
- Findings offer new insights into α-Syn's role in synucleinopathies at the isoform level.
- Highlights the potential of targeting specific transcript/protein isoforms and disease-driving cell subtypes for precision medicine in PD and DLB.
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