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Related Experiment Video

Updated: Jan 17, 2026

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Understanding Huntingtin protein aggregation in cell mimicking environments.

Apurva Mishra1, Pramit K Chowdhury1

  • 1Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.

Biochimica Et Biophysica Acta. Proteins and Proteomics
|September 17, 2025
PubMed
Summary

Macromolecular crowding accelerates mutant Huntingtin (HD39Q) protein aggregation, a key factor in neurodegenerative diseases. Different crowding agents impact aggregation rates based on their properties, offering insights into disease mechanisms.

Keywords:
DextranFicollHuntington protein aggregationImagingMacromolecular crowdingOligomer and fibril formationPEGThioflavin T assay

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Area of Science:

  • Biochemistry
  • Neuroscience
  • Molecular Biology

Background:

  • Protein aggregation is central to neurodegenerative diseases like Huntington's disease.
  • Understanding aggregation kinetics is vital for disease mechanism research.

Purpose of the Study:

  • Investigate the aggregation of mutant Huntingtin (HD39Q) protein.
  • Determine the impact of macromolecular crowding agents on aggregation kinetics and morphology.

Main Methods:

  • Fluorescence spectroscopy
  • Circular dichroism
  • Nanoparticle tracking analysis
  • Fluorescence correlation spectroscopy
  • Confocal and scanning electron microscopy

Main Results:

  • Crowding agents significantly accelerate HD39Q aggregation.
  • The effect of crowding agents varies based on their physicochemical properties.
  • Early-stage oligomerization dynamics were elucidated through fluorescence correlation spectroscopy.

Conclusions:

  • Intracellular-like environments, mimicked by crowding agents, influence protein aggregation.
  • Findings provide biophysical insights into aggregation-prone proteins relevant to neurodegeneration.