Regulatory function of microRNAs in microglia.

Area of Science:

• Neuroscience
• Molecular Biology
• Immunology

Background:

• Microglia are key immune cells in the central nervous system (CNS), crucial for immune surveillance and homeostasis.
• MicroRNAs (miRNAs) are small noncoding RNAs regulating gene expression post-transcriptionally.
• Dysregulated miRNA expression is implicated in aging, cancer, and neurodegenerative diseases.

Purpose of the Study:

• To review recent findings on miRNAs' role in microglia phenotype modulation.
• To explore the contribution of miRNAs to neurological disease pathogenesis.
• To highlight miRNAs' function in microglia polarization and restoration.

Main Methods:

• Literature review of recent studies on miRNAs and microglia.
• Analysis of miRNA involvement in intercellular communication via extracellular vesicles (EVs).
• Examination of miRNA roles in CNS immune responses and neuroinflammation.

Main Results:

• MicroRNAs are pivotal in regulating microglia function, polarization, and dysfunction.
• Microglia actively release and receive EVs containing miRNAs, facilitating intercellular signaling.
• Extracellular miRNAs exist in soluble forms, protein complexes, or as cargo within EVs.

Conclusions:

• miRNAs are critical regulators of microglia activity and are implicated in neurological disorders.
• Intercellular trafficking of miRNAs via EVs represents a significant mechanism in CNS communication.
• Understanding miRNA-EV interactions offers potential therapeutic targets for neurodegenerative diseases.