The Gut-Brain Axis, BDNF, NMDA and CNS Disorders

Area of Science:

• Neuroscience
• Microbiology
• Psychiatry

Background:

• The gut-brain axis and gastro-intestinal (GI) microbiota are critical for brain development and psychiatric disorders.
• Brain-Derived Neurotrophic Factor (BDNF) and N-methyl-D-aspartate receptors (NMDAR) are implicated in synaptic plasticity, cognitive function, and psychopathologies like schizophrenia.

Purpose of the Study:

• To review the influence of GI microbiota on BDNF and NMDAR.
• To analyze mechanisms linking gut microbiota to BDNF-induced NMDAR dysfunction for novel therapeutic insights.

Main Methods:

• Literature review focusing on the gut-brain axis, BDNF, and NMDAR.
• Analysis of pathways including the kynurenine pathway and short-chain fatty acids (SCFAs).

Main Results:

• Absence of GI microbes reduces central BDNF, impairing NMDAR production and leading to cognitive deficits.
• Gut microbiota modulate CNS BDNF via neurotransmitter function, the kynurenine pathway, and SCFAs.

Conclusions:

• Gut microbiota significantly impact BDNF and NMDAR function in the CNS.
• Modulating gut microbiota with probiotics, prebiotics, or antimicrobials may offer preventative or therapeutic strategies for CNS disorders and behavioral deficits.