Post-stroke depression: exploring gut microbiota-mediated barrier dysfunction through immune regulation

Area of Science:

• Neuroscience
• Microbiology
• Immunology

Background:

• Post-stroke depression (PSD) affects over a third of ischemic stroke survivors.
• PSD is often underdiagnosed and undertreated, with limited effective interventions.
• The gut microbiota-gut-brain axis (MGBA) is increasingly recognized for its role in brain function.

Purpose of the Study:

• To systematically review the role of the microbiota-immune-barrier axis in post-stroke depression (PSD).
• To analyze how gut microbiota impacts gut barrier integrity and function post-ischemic stroke (IS).
• To explore potential therapeutic strategies for PSD targeting the MGBA.

Main Methods:

• Literature review focusing on the interplay between gut microbiota, immune responses, and gut barrier function in IS and PSD.
• Analysis of emerging evidence on the microbiota-gut-brain axis (MGBA) in cerebral ischemia.
• Exploration of current technologies for assessing MGBA and potential therapeutic interventions for PSD.

Main Results:

• Emerging evidence implicates the gut microbiota in regulating gut-brain communication relevant to PSD.
• The gut barrier plays a critical role in modulating inflammatory and immune responses post-IS.
• The proposed microbiota-immune-barrier axis offers a novel framework for understanding PSD pathophysiology.

Conclusions:

• The gut microbiota significantly influences gut barrier integrity and immune function after IS, potentially driving PSD.
• Understanding the microbiota-immune-barrier axis provides new insights into PSD mechanisms.
• Targeting the MGBA presents promising therapeutic avenues for preventing and treating PSD.