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Spinal cord pathology in alpha-synuclein transgenic mice
Sonja Mendritzki1, Saskia Schmidt, Teresa Sczepan
1Department of Animal Physiology, Biology, and Biotechnology, Ruhr-University Bochum, ND/5131, D-44780 Bochum, Germany.
Parkinson'S Disease
|October 27, 2010
Summary
Transgenic mice overexpressing alpha-synuclein exhibit severe motor deficits and spinal cord glial cell death, indicating profound glial pathology in neurodegenerative disease models.
Area of Science:
- Neuroscience
- Cell Biology
- Pathology
Background:
- Alpha-synuclein aggregation is a hallmark of neurodegenerative diseases like Parkinson's disease.
- Previous studies reported mitochondrial dysfunction in neurons and glial cells of the mesencephalon in transgenic mice.
- No neuron death was observed in the brain in prior investigations.
Purpose of the Study:
- To investigate the behavioral and cellular consequences of alpha-synuclein overexpression in transgenic mice.
- To examine glial cell pathology in the spinal cord.
- To assess mitochondrial function in various cell types.
Main Methods:
- Behavioral testing to assess motor impairments.
- Cell death staining and immunohistochemistry to identify dying cells and glial activation.
- Ultrastructural analysis to examine cellular morphology and mitochondrial integrity.
Main Results:
- Transgenic mice displayed significant motor impairments in behavioral tests.
- Astrocytic cell death was observed in the spinal cord, alongside extensive gliosis and microglial activation.
- Ultrastructural analysis revealed severe mitochondrial impairments in spinal cord astrocytes, oligodendrocytes, and to a lesser extent, neurons.
Conclusions:
- Transgenic mice overexpressing alpha-synuclein exhibit profound glial cell pathology in the spinal cord.
- The findings highlight the critical role of glial cells in the pathogenesis of alpha-synucleinopathies.
- These mice serve as a valuable model for studying glial dysfunction in neurodegenerative diseases.
