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Synaptophysin expression in the striatum in Huntington's disease
1Bluestone Laboratory, Division of Neuropathology, Montefiore Medical Center, Bronx, NY 10467-2490.
Acta Neuropathologica
|January 1, 1990
Summary
Huntington's disease (HD) causes significant synaptic loss in the striatum, indicated by reduced synaptophysin (SYP) expression. This loss is likely due to the degeneration of medium-sized spiny neurons, a hallmark of HD.
Area of Science:
- Neuroscience
- Neuropathology
- Neurodegenerative Diseases
Background:
- Huntington's disease (HD) is a neurodegenerative disorder.
- Medium-sized spiny neurons are critical for striatal function and are primarily affected in HD.
- Synaptophysin (SYP) is a marker of synaptic density.
Purpose of the Study:
- To compare synaptophysin (SYP) expression in the striatum of HD patients with controls.
- To investigate the relationship between SYP expression and calcineurin (CaN) as a marker for medium-sized spiny neurons in HD.
Main Methods:
- Immunohistochemical analysis of striatal tissue from HD patients and controls.
- Quantification and comparison of synaptophysin (SYP) and calcineurin (CaN) immunoreactivity.
Main Results:
- A significant reduction in SYP immunoreactivity was observed in the HD striatum compared to controls.
- The remaining SYP staining in HD striata showed an inhomogeneous pattern, similar to CaN staining.
- These findings suggest a loss of synapses in the HD striatum.
Conclusions:
- The observed synaptic loss in HD is likely a consequence of the degeneration of medium-sized spiny neurons.
- SYP expression can serve as an indicator of synaptic integrity in the context of Huntington's disease.