Molecular Insights into Transcranial Direct Current Stimulation Effects: Metabolomics and Transcriptomics Analyses

Area of Science:

• Neuroscience
• Metabolomics
• Molecular Biology

Background:

• Transcranial direct current stimulation (tDCS) is a non-invasive neurostimulation technique with unclear molecular mechanisms.
• Previous studies suggest tDCS induces metabolic effects, potentially explaining its long-term clinical benefits.
• Understanding these metabolic effects is crucial for optimizing tDCS applications.

Purpose of the Study:

• To delineate the specific metabolic pathways affected by tDCS.
• To investigate the molecular mode of action of tDCS.
• To correlate metabolic changes with neurostimulation effects.

Main Methods:

• Co-analysis of metabolomics and transcriptomic data from anodal tDCS in rat models.
• Generation of a novel metabolomics dataset using LC-MS/MS following tDCS.
• Utilized a publicly available transcriptomic dataset for integrated analysis.

Main Results:

• tDCS significantly alters the brain tissue metabolic profile.
• Key bioenergetic pathways, including glycolysis and mitochondrial function, were modulated by tDCS.
• tDCS induced alterations in calcium-related signaling pathways.

Conclusions:

• tDCS influences brain metabolism by modulating energy production processes.
• tDCS-induced changes in calcium dynamics may drive subsequent metabolic pathway modifications.
• Elucidating tDCS molecular mechanisms can lead to personalized neurostimulation therapies.