α-Synuclein aggregation landscape from phase separation to neurotoxic intermediates.

Area of Science:

• Neuroscience
• Biochemistry
• Pathology

Background:

• Aberrant aggregation of alpha-synuclein (αS) into amyloid fibrils is a hallmark of Parkinson's disease.
• Transient intermediates in αS aggregation are linked to cellular toxicity but remain poorly understood.

Purpose of the Study:

• To review the mechanistic principles of αS aggregation.
• To emphasize the role of liquid-liquid phase separation (LLPS) as a critical intermediate in αS aggregation.
• To discuss how αS structural evolution in condensed phases influences cellular dysfunction and disease propagation.

Main Methods:

• Literature review of αS aggregation mechanisms.
• Focus on liquid-liquid phase separation (LLPS) as a key intermediate step.
• Analysis of the structural evolution of αS within condensed phases.

Main Results:

• Liquid-liquid phase separation (LLPS) is identified as a critical intermediate in αS aggregation.
• The structural changes of αS within condensed phases dictate cellular dysfunction and pathological spread.
• A state-centric therapeutic paradigm is proposed, focusing on modulating αS condensate properties.

Conclusions:

• Understanding αS aggregation intermediates, particularly LLPS, is crucial for Parkinson's disease research.
• Modulating the physical properties of αS condensates offers a novel therapeutic strategy.
• This approach presents a sophisticated alternative to traditional inhibition strategies for Parkinson's disease.