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Related Experiment Video

Updated: Jan 1, 2026

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Correlations Between Mutant Huntingtin Aggregates and Behavioral Changes in R6/1 Mice.

Magali Cabanas1,2, Marion Piquemal1,2, Cristiana Pistono1,2

  • 1Institute of Cognitive and Integrative Neuroscience of Aquitaine, CNRS UMR 5287, Pessac Cedex, France.

Journal of Huntington'S Disease
|December 24, 2019
PubMed
Summary
This summary is machine-generated.

Huntington's disease (HD) involves mutant huntingtin (mHtt) aggregates in neurons. This study in R6/1 mice shows mHtt aggregate levels correlate with HD symptom severity, but this relationship varies by brain region.

Keywords:
Mutant huntingtin aggregatesR6/1 miceanxietyinstinctive behaviormotor activityshort-term and long-term memoryspatial memory

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Area of Science:

  • Neuroscience
  • Genetics
  • Molecular Biology

Background:

  • Huntington's disease (HD) is a neurodegenerative disorder.
  • Caused by CAG trinucleotide expansion in the HD gene.
  • Nuclear aggregates of mutant huntingtin (mHtt) are a hallmark, but their toxicity mechanism is unclear.

Purpose of the Study:

  • To assess the correlation between mHtt aggregate load and HD symptom severity in R6/1 mice.
  • To investigate regional differences in this correlation.

Main Methods:

  • Utilized 3-month-old R6/1 mice, an age exhibiting variable symptom severity.
  • Examined correlations between behavioral deficits and nuclear mHtt aggregate levels in specific neuroanatomical regions.
  • Assessed instinctive, anxiety-related, and long-term memory behaviors.

Main Results:

  • R6/1 mice showed deficits in instinctive, anxiety-related, and long-term memory behaviors.
  • Female mice exhibited less severe deficits than males.
  • mHtt aggregate levels correlated with HD phenotypes in most regions, but an inverse correlation was observed in others.

Conclusions:

  • mHtt aggregates play a harmful role in HD symptoms.
  • The impact of mHtt aggregates is region-specific within the brain.