Stress-Induced Membraneless Organelles in Neurons: Bridging Liquid-Liquid Phase Separation and Neurodevelopmental...

Area of Science:

• Cell Biology
• Neurobiology
• Biochemistry

Background:

• Liquid-liquid phase separation (LLPS) organizes cellular functions via dynamic, membraneless organelles (MLOs).
• In neurons, LLPS regulates synaptic plasticity, RNA metabolism, and stress responses.
• LLPS is increasingly recognized as a framework for understanding neurodevelopmental disorders (NDDs).

Purpose of the Study:

• To explore the role of stress-induced MLOs in the nervous system.
• To elucidate the molecular principles governing MLO formation.
• To connect MLO dysfunction to neurodevelopmental impairment.

Main Methods:

• Review of recent studies on LLPS in neurobiology.
• Analysis of the role of intrinsically disordered regions (IDRs) in LLPS.
• Examination of stress granules, nuclear paraspeckles, and P-bodies.

Main Results:

• Mutations in IDRs can alter MLO properties, leading to aberrant assemblies.
• These aberrant MLOs disrupt RNA processing (transport, splicing, translation) in developing neurons.
• Dysfunctional MLOs contribute to the pathology of NDDs.

Conclusions:

• LLPS is critical for neuronal function and development.
• Aberrant LLPS and MLO formation are implicated in NDDs.
• Understanding MLO dynamics offers insights into neurodevelopmental impairment and stress responses.