Microbiota-brain interactions: Moving toward mechanisms in model organisms.

Area of Science:

• Neuroscience
• Microbiology
• Genetics

Background:

• Microbiota composition influences nervous system structure, function, and behavior.
• Alterations in the microbiota are linked to neuropsychiatric and neurodegenerative disorders.
• Mammalian models, particularly germ-free mice, have been crucial for studying microbiota-brain interactions.

Purpose of the Study:

• To review the current understanding of the microbiota-brain axis in rodents and humans.
• To discuss recent findings on microbiota effects in simpler model organisms (fish, flies, worms).
• To advocate for a cross-species approach to understand microbiota-brain communication for therapeutic development.

Main Methods:

• Literature review of existing studies on the microbiota-brain axis.
• Synthesis of research findings from mammalian, fish, fly, and worm models.
• Discussion of neurobiological and behavioral effects of microbiota.

Main Results:

• The microbiota-brain axis is conserved across diverse species.
• Simpler model organisms offer powerful tools for mechanistic studies of microbiota-brain communication.
• Cross-species research reveals conserved pathways and novel insights.

Conclusions:

• A comprehensive, cross-species approach is vital for understanding microbiota-brain communication.
• Mechanistic insights from diverse models can guide the development of microbiota-based therapeutics for brain disorders.
• Future research should integrate findings from various model systems to combat neurological diseases.