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Huntington's Disease and Striatal Signaling
Emmanuel Roze1, Emma Cahill, Elodie Martin
1UMRS 952, INSERM, UMR 7224, CNRS Université Pierre et Marie Curie - Paris-6 Paris, France.
Frontiers in Neuroanatomy
|October 19, 2011
Summary
Huntington's Disease (HD), a neurodegenerative disorder, stems from CAG polyglutamine expansion. Early striatal atrophy suggests potential therapeutic benefits before symptom onset in this autosomal dominant condition.
Area of Science:
- Neuroscience
- Genetics
- Neurology
Background:
- Huntington's Disease (HD) is the most common inherited neurodegenerative disorder.
- It is caused by a CAG polyglutamine expansion in the Huntingtin gene, leading to autosomal dominant inheritance.
- Clinical features include chorea, cognitive decline, and psychiatric disturbances.
Purpose of the Study:
- To investigate the cellular mechanisms underlying striatal vulnerability in Huntington's Disease.
- To understand the temporal progression of neurodegeneration in HD.
- To identify potential therapeutic targets for early intervention.
Main Methods:
- Review of existing literature on HD pathogenesis.
- Analysis of neuropathological findings in HD patients.
- Examination of cellular and molecular mechanisms of neuronal dysfunction.
Main Results:
- Striatal atrophy commences approximately 15 years prior to clinical symptom manifestation.
- Mutant Huntingtin aggregation, impaired axonal transport, excitotoxicity, and mitochondrial dysfunction contribute to striatal neuron death.
- Altered striatal signaling pathways are implicated in orchestrating downstream pathological events.
Conclusions:
- HD exhibits a distinct striatal vulnerability despite widespread Huntingtin protein expression.
- Therapeutic interventions targeting early cellular events, particularly in the striatum, may be beneficial.
- Understanding the cascade of striatal dysfunction is crucial for developing effective HD treatments.
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