Cholinergic basal forebrain modulation of glymphatic function: implications for depression

Area of Science:

• Neuroscience
• Neuroimaging
• Psychiatry

Background:

• Glymphatic system dysfunction is linked to depression, but its regulation is unknown.
• The cholinergic basal forebrain (ChBF) is a potential regulator of glymphatic function and depression.

Purpose of the Study:

• To investigate the regulatory role of the ChBF in glymphatic function and its connection to depression.
• To test the hypothesis that ChBF modulates glymphatic function, influencing depression.

Main Methods:

• Utilized multimodal neuroimaging (MRI, fMRI) in stroke and non-stroke cohorts.
• Assessed glymphatic function using DTI-ALPS index and gBOLD-CSF coupling.
• Employed lesion network mapping and transcranial magnetic stimulation (TMS).

Main Results:

• ChBF functional connectivity (FC) predicted glymphatic impairment and recovery.
• Glymphatic dysfunction mediated the link between ChBF damage and post-stroke depression.
• Enhanced ChBF FC correlated with antidepressant efficacy and glymphatic improvement.

Conclusions:

• The ChBF plays a key regulatory role in glymphatic function.
• Glymphatic function influences depression, suggesting it as a therapeutic target.
• Findings support developing glymphatic-based depression therapies.