The Gut Microbiota: A Mediator in the Brain-Gut-Microbiota Axis

The gut microbiota, situated at one end of the brain-gut-microbiota axis, is considered a mediator due to its role in facilitating communication between the brain and the gut. This mediation is attributed to the ability of the gut microbiota to influence and modulate various physiological processes through the production of bioactive compounds, including metabolites, hormones, and neurotransmitters. These signaling molecules can interact with the nervous system through mechanisms such as neural signaling, immune modulation, and neuroendocrine pathways. By acting as a mediator, the gut microbiota plays a crucial role in facilitating bidirectional communication and regulating the functional interplay within the brain-gut-microbiota axis.