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Exogenous Administration of Microsomes-associated Alpha-synuclein Aggregates to Primary Neurons As a Powerful Cell Model of Fibrils Formation
Published on: June 26, 2018
Alpha-synuclein deficient mice are resistant to toxin-induced multiple system atrophy
Kiren Ubhi1, Edward Rockenstein, Michael Mante
1Department of Neurosciences, University of California San Diego, School of Medicine, La Jolla, California 92093-0624, USA.
Multiple systems atrophy (MSA) deficits may stem from specific alpha-synuclein modifications, not just general oxidative stress. This study used alpha-synuclein knockout mice to model MSA and found reduced pathology and motor deficits.
Area of Science:
- Neurodegenerative diseases
- Molecular neuroscience
- Oxidative stress mechanisms
Background:
- Multiple systems atrophy (MSA) is a neurodegenerative disorder linked to alpha-synuclein (alphasyn) accumulation.
- Oxidative stress is implicated in MSA pathogenesis.
Purpose of the Study:
- To investigate the role of specific alpha-synuclein modifications in MSA, beyond general oxidative damage.
- To examine the effects of 3-nitropropionic acid (3NP)-induced oxidative stress in alpha-synuclein knockout (alphasynKO) mice, a model for MSA.
Main Methods:
- Administration of 3-nitropropionic acid (3NP) to induce an MSA model.
- Utilized alpha-synuclein knockout (alphasynKO) mice to assess the impact of lacking alpha-synuclein.
- Evaluated neuronal loss, dendritic pathology, motor deficits, and striatal immunoreactivity for tyrosine hydroxylase and dopamine transporter.
Main Results:
- AlphasynKO mice showed reduced neuronal loss and dendritic pathology despite susceptibility to oxidative stress.
- These mice were resistant to 3NP-induced motor deficits.
- Attenuated loss of tyrosine hydroxylase and dopamine transporter striatal immunoreactivity was observed in alphasynKO mice.
Conclusions:
- MSA-related deficits may not solely result from general oxidative protein modification.
- Specific alpha-synuclein modifications could play a crucial role in MSA pathology.
- Targeting specific alphasyn modifications may offer therapeutic strategies for MSA.
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