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Loss of matrix calcium-binding protein-containing neurons in Huntington's disease
A Seto-Ohshima1, P C Emson, E Lawson
1MRC Group, AFRC, Institute of Animal Physiology and Genetics Research, Babraham, Cambridge.
Insights
Huntington's disease (HD) causes significant loss of calbindin neurons in the brain's neostriatum. This suggests impaired calcium buffering may contribute to neuronal death in HD patients.
Area of Science:
- Neuroscience
- Neurobiology
- Neuropathology
Background:
- Huntington's disease (HD) is a progressive neurodegenerative disorder.
- The neostriatum is a key brain region affected in HD.
Observation:
- Post-mortem brain analysis of HD patients revealed a marked reduction in calbindin 28K-expressing neurons within the neostriatum.
- These specific neurons and their associated striatal areas show particular vulnerability in HD.
Findings:
- A substantial loss of calbindin 28K neurons was observed in the neostriatum of individuals with Huntington's disease.
- The findings highlight the selective vulnerability of calbindin-positive neurons in HD pathogenesis.
Implications:
- The observed neuronal loss suggests a potential role for calcium dysregulation in Huntington's disease.
- Impaired calcium buffering or homeostasis may be a contributing factor to cell death in the neostriatum in HD.
Abstract:
In post-mortem brain specimens from patients dying with a clinical diagnosis of Huntington's disease (HD) immunohistochemistry showed a substantial loss from the neostriatum of neurons containing the calcium-binding protein calbindin 28K. These calbindin neurons, and the straital compartment in which they are sited, are particularly damaged in HD, suggesting that a failure of calcium buffering or homeostasis may contribute to cell death in HD.