In vitro, cellular and in vivo studies of amyloid oligomers structure and toxicity: Challenges and advances

Area of Science:

• Biochemistry
• Molecular Biology
• Neuroscience

Background:

• Oligomeric assemblies of amyloidogenic proteins (e.g., Aβ, tau, α-synuclein) are implicated in neurodegenerative and systemic disorders.
• Understanding these protein oligomers is challenging due to their low abundance, heterogeneity, and transient nature.

Purpose of the Study:

• To review current and emerging methods for studying amyloid oligomers.
• To highlight advances in detecting misfolded proteins in biological systems.
• To discuss strategies for translating research findings into therapeutic interventions.

Main Methods:

• Biophysical techniques: Nuclear Magnetic Resonance (NMR), cryo-electron microscopy (cryo-EM), high-speed atomic force microscopy (HS-AFM), mass spectrometry.
• Computational approaches: Molecular dynamics simulations.
• Biological models: Cellular assays, organoids, animal models.

Main Results:

• Current methods provide insights into the molecular properties of amyloid oligomers.
• Emerging techniques enhance detection in complex biological environments and live cells.
• Recent advances address challenges in studying oligomer heterogeneity and transient states.

Conclusions:

• Diverse experimental platforms yielding complementary data are essential for studying amyloid oligomers.
• Reproducible and mechanistically clear methods are crucial for therapeutic development.
• Further research aims to translate findings on pathogenic oligomers into effective treatments for neurodegenerative diseases.