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Huntingtin processing in pathogenesis of Huntington disease

Zheng-Hong Qin1, Zhen-Lun Gu

  • 1Department of Pharmacology, Soochow University School of Medicine, Suzhou 215007, China. zhqin5@hotmail.com

Acta Pharmacologica Sinica
|October 1, 2004
PubMed

Insights

Huntingtons disease (HD) results from a mutant huntingtin protein. This review explores how proteases impact huntingtin processing and contribute to neurodegeneration in HD.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Huntingtons disease (HD) is a neurodegenerative disorder caused by polyglutamine tract expansion in the huntingtin protein.
  • This expansion leads to selective degeneration of neurons in the striatum and cortex.
  • Key pathological hallmarks include intranuclear and cytoplasmic aggregates of mutant huntingtin.

Purpose of the Study:

  • To review the role of proteases in the cleavage and degradation of huntingtin.
  • To examine how altered processing of mutant huntingtin contributes to the pathogenesis of Huntingtons disease.

Main Methods:

  • Literature review focusing on proteases and huntingtin processing.
  • Analysis of studies on protein misfolding and degradation pathways in neurodegenerative diseases.

Main Results:

  • Mutant huntingtin accumulation is prominent in HD brains.
  • Protein misfolding and impaired protein processing/degradation are central to HD pathology.
  • Specific proteases play a critical role in cleaving and degrading huntingtin.

Conclusions:

  • Protease activity is crucial for managing huntingtin protein levels.
  • Dysregulation of protease function in mutant huntingtin processing contributes significantly to HD pathogenesis.
  • Targeting protease pathways may offer therapeutic strategies for Huntingtons disease.

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