Rational Modulation of Liquid-Liquid Phase Separation Offers Novel Ways to Combat Tauopathies

Area of Science:

• Neuroscience
• Molecular Biology
• Biochemistry

Background:

• Microtubule-associated protein tau (MAPT) is crucial for neuronal function, including axonal transport and synaptic plasticity.
• MAPT aggregation into neurofibrillary tangles is a hallmark of tauopathies, a class of neurodegenerative diseases.
• Current treatments for tauopathies are limited, necessitating novel therapeutic approaches.

Purpose of the Study:

• To provide an overview of tau protein structure and phase transition dynamics.
• To focus on the role of liquid-liquid phase separation (LLPS) in tau biology and pathology.
• To discuss therapeutic strategies for tauopathies centered on modulating tau phase separation.

Main Methods:

• Review of existing literature on tau protein structure, function, and aggregation.
• Analysis of the mechanisms underlying tau liquid-liquid phase separation.
• Identification and discussion of potential therapeutic interventions targeting tau phase separation.

Main Results:

• Tau protein undergoes liquid-liquid phase separation, forming dynamic condensates.
• LLPS of tau is implicated in both normal neuronal function and the pathogenesis of tauopathies.
• Aberrant phase transitions, such as liquid-to-solid transformation, contribute to tau pathology.

Conclusions:

• Targeting tau phase separation offers promising therapeutic avenues for tauopathies.
• Strategies include modulating condensate formation, delaying liquid-to-solid transitions, and reducing aggregation-prone species.
• Understanding tau conformational changes during phase transitions is key to developing effective treatments.