Related Experiment Video

Updated: Feb 22, 2026

Efficient and Scalable Production of Full-length Human Huntingtin Variants in Mammalian Cells using a Transient Expression System
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Efficient and Scalable Production of Full-length Human Huntingtin Variants in Mammalian Cells using a Transient Expression System

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The diagnosis and natural history of Huntington disease

Fernando Pagan1, Yasar Torres-Yaghi1, Marcelle Altshuler2

  • 1Department of Neurology, Georgetown University Hospital, Washington, DC, United States.

Handbook of Clinical Neurology
|September 27, 2017
PubMed

Insights

Huntington disease (HD) is a genetic disorder caused by CAG triplet repeats in the HTT gene. Quantifying these repeats offers crucial insights into HD onset, severity, and progression, aiding therapeutic development.

Area of Science:

  • Genetics
  • Neuroscience
  • Molecular Biology

Background:

  • Huntington disease (HD) is an autosomal-dominant neurodegenerative disorder.
  • It stems from expanded CAG triplet repeats in the Huntingtin (HTT) gene, leading to an elongated polyglutamine sequence.
  • This protein accumulation causes neurodegeneration impacting motor, cognitive, and behavioral functions.

Purpose of the Study:

  • To highlight the genetic basis of Huntington disease.
  • To emphasize the importance of quantifying CAG triplet repeats for understanding disease characteristics.
  • To underscore the relevance of HD research for other protein-misfolding neurodegenerative diseases.

Main Methods:

  • Genetic analysis to quantify CAG triplet repeat numbers in the HTT gene.
  • Clinical assessment of motor, cognitive, and behavioral domains.
  • Review of existing literature on HD pathogenesis and progression.

Main Results:

  • CAG triplet repeat length directly correlates with HD clinical onset, severity, and progression.
  • The expanded polyglutamine sequence in Huntingtin protein is central to neurodegeneration in HD.
  • HD affects multiple generations and can manifest over decades.

Conclusions:

  • Quantifying CAG repeats is essential for predicting and managing Huntington disease.
  • Understanding HD mechanisms provides a valuable framework for developing therapies for related neurodegenerative disorders.
  • Further research into HD genetics and proteinopathy can accelerate therapeutic advancements.

Keywords:
CAG repeatsHTTHuntingtin proteinHuntington diseasediagnosis of HDnatural history of HDneurodegenerative disorder

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