Small Extracellular Vesicles in Neurodegenerative Disease: Emerging Roles in Pathogenesis, Biomarker Discovery, and...

Area of Science:

• Neuroscience
• Biotechnology
• Cell Biology

Background:

• Neurodegenerative diseases (NDDs) present a significant global health challenge.
• Small extracellular vesicles (sEVs) are emerging as critical mediators in NDD pathogenesis.
• sEVs facilitate the intercellular transfer of pathological proteins and nucleic acids implicated in NDDs.

Purpose of the Study:

• To review the mechanistic roles of sEVs in neurodegenerative diseases.
• To explore the diagnostic potential of sEVs for early detection and monitoring of NDDs.
• To discuss the therapeutic applications of sEVs in NDD treatment and CNS-targeted delivery.

Main Methods:

• Literature review of recent studies on sEVs in Alzheimer's, Parkinson's, ALS, and Huntington's disease.
• Analysis of sEVs' role in intercellular communication and pathological protein propagation.
• Evaluation of sEV-based diagnostic strategies and therapeutic delivery systems.

Main Results:

• sEVs carry and spread key NDD-associated proteins (Aβ, tau, TDP-43, α-synuclein).
• sEVs demonstrate superior diagnostic potential compared to traditional biomarkers for NDDs.
• Engineered sEVs show efficacy in preclinical models for CNS-targeted delivery of therapeutics.

Conclusions:

• sEVs are pivotal in NDD progression, offering significant diagnostic and therapeutic opportunities.
• Standardization, scalability, and regulatory harmonization are crucial for clinical translation of sEVs.
• Emerging technologies like CRISPR barcoding and AI analytics are addressing translational challenges for sEVs in NDDs.