miRNA-206 in muscle and central nervous system crosstalk during exercise: A double-edged sword with therapeutic...

Area of Science:

• Exercise science
• Molecular biology
• Neuroscience

Background:

• Physical activity induces molecular changes in skeletal muscle.
• Muscle-derived microRNAs (myomiRs) act as systemic signaling molecules.
• miR-206 is a key myomiR with dual roles in muscle and CNS.

Purpose of the Study:

• To review miR-206 regulation during exercise.
• To examine miR-206 effects on muscle biology (regeneration, fiber type, mitochondria, NMJ repair).
• To explore miR-206's paradoxical impact on the CNS, including neuroplasticity and disease vulnerability.

Main Methods:

• Literature review of studies on miR-206.
• Analysis of miR-206 regulation by exercise.
• Examination of miR-206 targets and pathways in muscle and CNS.

Main Results:

• Exercise regulates miR-206 expression in skeletal muscle.
• miR-206 promotes muscle regeneration and influences fiber type, mitochondria, and NMJ repair.
• High miR-206 in CNS targets BDNF, reducing neuroplasticity and increasing susceptibility to neuropsychiatric/neurodegenerative diseases.

Conclusions:

• miR-206 has a critical role in muscle-brain communication.
• Its effects are context- and tissue-specific, being detrimental in Alzheimer's, stroke, and depression, but potentially beneficial in ALS.
• miR-206 presents potential as a biomarker and therapeutic target, requiring tissue-specific strategies.