Exercise Rescues Obesogenic-Related Genes in the Female Hypothalamic Arcuate Nucleus: A Potential Role of miR-211...

Area of Science:

• Neuroscience
• Genetics
• Metabolism

Background:

• Obesity is a significant public health issue linked to adverse health outcomes.
• Exercise and diet are common strategies for obesity management.
• Diet-induced obesity (DIO) disrupts hypothalamic gene expression regulating appetite.

Purpose of the Study:

• To investigate how voluntary exercise impacts gene expression in the hypothalamic arcuate nucleus (ARC) of DIO rats.
• To identify novel genes regulated by exercise in the ARC.
• To evaluate the role of microRNA-211 (miR-211) in exercise-mediated obesity reversal.

Main Methods:

• Transcriptomic analysis of the ARC in DIO rats undergoing voluntary wheel running.
• Physiological, pharmacological, and bioinformatics analyses.
• In vivo administration of miR-211 mimics.

Main Results:

• Exercise reduced weight gain and fat mass, and normalized ARC gene expression in DIO rats.
• Running altered gene expression patterns related to inflammation and cellular structure.
• Exercise ameliorated diet-induced overexpression of miR-211 in the ARC, highlighting its role in inflammation regulation.
• miR-211 mimic administration influenced immunity and cell cycle genes.

Conclusions:

• Voluntary exercise can reverse obesity by modulating gene expression in the ARC.
• miR-211 plays a crucial role in mediating exercise's anti-inflammatory effects in the ARC.
• Exercise-induced obesity reduction is partially mediated by miR-211-dependent gene expression changes.