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Cerebellar Regional Dissection for Molecular Analysis
Published on: December 5, 2020
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Molecular mechanisms underlying Spinocerebellar Ataxia 17 (SCA17) pathogenesis
Su Yang1, Xiao-Jiang Li2, Shihua Li1
1Department of Human Genetics, Emory University School of Medicine , Atlanta, GA, USA.
Rare Diseases (Austin, Tex.)
|December 30, 2016
Summary
Spinocerebellar ataxia 17 (SCA17) is a neurodegenerative disease caused by expanded polyglutamine in TATA box binding protein (TBP). Impaired transcription due to mutant TBP is key to SCA17 pathogenesis, suggesting transcript level correction as a therapy.
Area of Science:
- Neuroscience
- Genetics
- Molecular Biology
Background:
- Spinocerebellar ataxia 17 (SCA17) is a fatal, inherited neurodegenerative disorder.
- It is characterized by polyglutamine (polyQ) expansion in the TATA box binding protein (TBP).
- SCA17 patients exhibit diverse motor and non-motor symptoms with a limited life expectancy.
Purpose of the Study:
- To review current knowledge on SCA17 molecular pathogenesis.
- To focus on the role of transcriptional dysregulation in SCA17.
- To highlight potential therapeutic strategies targeting transcript levels.
Main Methods:
- Literature review of molecular mechanisms in SCA17.
- Analysis of TBP function and polyQ expansion effects.
- Examination of transcriptional dysregulation pathways.
Main Results:
- Polyglutamine expansion in TBP disrupts its function as a general transcription factor.
- Mutant TBP leads to significant transcriptional dysregulation.
- Impaired transcriptional activity is a major contributor to SCA17 toxicity.
Conclusions:
- Transcriptional dysregulation is a central mechanism in SCA17 pathogenesis.
- Restoring normal transcript levels offers a promising therapeutic avenue.
- Further research into TBP-mediated transcriptional control is crucial for SCA17 treatment.
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