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Updated: Feb 23, 2026

Characterizing Individual Protein Aggregates by Infrared Nanospectroscopy and Atomic Force Microscopy
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Characterizing Individual Protein Aggregates by Infrared Nanospectroscopy and Atomic Force Microscopy

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Lessons learned from protein aggregation: toward technological and biomedical applications.

César L Avila1,2, Silvina Chaves1,2, Sergio B Socias1,2

  • 1Instituto Superior de Investigaciones Biológicas (INSIBIO), Centro Científico Tecnológico (CCT) Tucumán, CONICET-Universidad Nacional de Tucumán (CONICET-UNT), Crisóstomo Alvarez 722, Tucumán, Argentina.

Biophysical Reviews
|September 15, 2017
PubMed
Summary

This study explores using biophysics to combat neurodegenerative diseases by modifying protein aggregation. Strategies include using doxycycline to neutralize toxic alpha-synuclein and employing extracellular GAPDH and amyloid nanofibrils for neuroprotection and biomaterials.

Keywords:
Alzheimer’s diseaseAmyloidAmyloid functionalizationCross-beta structureGlycosaminoglycanParkinson’s diseaseProtein aggregation

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Area of Science:

  • Biophysics
  • Neurobiology
  • Nanotechnology
  • Biotechnology

Background:

  • Protein aggregation is closely linked to neurodegenerative diseases.
  • Understanding molecular aggregation principles can aid drug design for palliative treatments.
  • Protein aggregation has potential applications in novel nanomaterial design.

Purpose of the Study:

  • To review novel neuroprotective strategies using a biophysical approach.
  • To investigate doxycycline's effect on alpha-synuclein oligomers.
  • To explore extracellular GAPDH and glycosaminoglycan (GAG) roles in proteostasis and disease spread.
  • To review the use of amyloid aggregates as nanomaterials for biotechnology.

Main Methods:

  • Examining doxycycline's mechanism in reshaping alpha-synuclein oligomers.
  • Investigating extracellular glyceraldehyde 3-phosphate dehydrogenase (GAPDH) and GAG interactions.
  • Designing insoluble biocatalysts using photo-immobilized enzymes on protein:GAG amyloid nanofibrils.

Main Results:

  • Doxycycline reshapes toxic alpha-synuclein oligomers into non-toxic species, reducing membrane destabilization and cell toxicity.
  • Extracellular GAPDH, in conjunction with specific GAGs, can sequester toxic alpha-synuclein species, potentially inhibiting disease spread.
  • Novel biocatalysts were developed by immobilizing enzymes onto hybrid protein:GAG amyloid nanofibrils, offering easy functionalization via dityrosine covalent bonds.

Conclusions:

  • Biophysical approaches offer promising strategies for neuroprotection against protein aggregation diseases like Parkinson's.
  • Extracellular GAPDH and GAGs present a novel mechanism for interfering with neurodegenerative disease progression.
  • Amyloid aggregates can be engineered into advanced nanomaterials for biotechnological applications, such as biocatalysis.