1. Alpha-synuclein is known to play an important role in the pathogenesis of Parkinson’s disease (PD). The pathogenicity of α-synuclein is related to its ability to form intraneuronal inclusions. The inclusions, which are found in brains of patients with PD and diffuse Lewy body disease consist partially of C-terminally truncated α-synuclein. This α-synuclein species has an increased ability to form aggregates compared to full length α-synuclein.
2. We have used an adeno-associated virus (AAV) vector system to overexpress either C-terminally truncated or full length α-synuclein containing the A53T mutation, which have both been identified in brains of familial PD patients and transgenic mouse models. Dissociated mesencephalic neurons, cerebellar granule neurons, and organotypic midbrain slice cultures were infected with AAV containing the transgene under the control of the cytomegalovirus promoter.
3. We demonstrate that viral overexpression of α-synuclein(A53T) leads to the formation of distorted neurites, intraneuritic swellings, and granular perikaryal deposits in cultured neurons. Our results indicate that these cell culture models may represent an early phase of PD reflecting pathologic neuritic alterations before significant neuronal cell loss occurs.
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Abbreviations
- AAV:
-
adeno-associated virus
- AD:
-
Alzheimer’s disease
- CGN:
-
cerebellar granule neuron
- CMV:
-
cytomegalovirus
- CSPα:
-
cystein-string-protein-α
- DA:
-
dopaminergic
- EGFP:
-
enhanced green fluorescent protein
- HBSS:
-
Hank’s balanced salt solution
- PD:
-
Parkinson’s disease
- TUNEL:
-
terminal deoxyribonucleotidyl transferase (TdT)-mediated biotin-16-dUTP nick-end labeling
- WT:
-
wild-type.
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Zach, S., Bueler, H., Hengerer, B. et al. Predominant Neuritic Pathology Induced by Viral Overexpression of α-Synuclein in Cell Culture. Cell Mol Neurobiol 27, 505–515 (2007). https://doi.org/10.1007/s10571-007-9141-5
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DOI: https://doi.org/10.1007/s10571-007-9141-5