Extracellular Protein Quality Control in Tau Pathology

Area of Science:

• Neuroscience
• Molecular Biology
• Biochemistry

Background:

• Aging is a major risk factor for neurodegenerative diseases, including tauopathies.
• Tauopathies, such as Alzheimer's Disease, involve the accumulation of misfolded tau protein aggregates.
• Pathological tau aggregation and its prion-like spread contribute to neuronal dysfunction and cognitive decline.

Purpose of the Study:

• To review the mechanisms of tau secretion and propagation.
• To explore the role of extracellular protein quality control (PQC) in tau homeostasis.
• To identify potential therapeutic strategies for tauopathies by targeting tau extracellular processes.

Main Methods:

• Literature review of studies on tau protein, neurodegeneration, and protein quality control.
• Analysis of mechanisms underlying tau secretion, intercellular spread, and clearance.
• Examination of the impact of aging on extracellular PQC systems.

Main Results:

• Aging-related decline in extracellular PQC enhances toxic tau aggregation and spread.
• Tau can spread between neurons in a prion-like manner, accelerating disease progression.
• Dysfunctional PQC contributes to extracellular tau accumulation.

Conclusions:

• Therapeutic strategies targeting tau secretion, propagation, and extracellular PQC are promising for treating tauopathies.
• Restoring or enhancing extracellular PQC may mitigate age-related tau pathology.
• Understanding tau extracellular dynamics is crucial for developing effective Alzheimer's Disease treatments.