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A Gut-on-a-Chip Model to Study the Gut Microbiome-Nervous System Axis
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The Gut-Brain Axis and Its Role in Depression
Saruja Nanthakumaran1, Saijanakan Sridharan1, Manoj R Somagutta1
1Department of Research, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA.
Cureus
|October 12, 2020
Summary
The gut microbiome communicates with the brain via the gut-brain axis. Specific gut bacteria and the vagus nerve are key to managing depression with selective serotonin receptor inhibitors (SSRIs).
Area of Science:
- Neuroscience
- Microbiology
- Psychiatry
Background:
- The gut microbiota and central nervous system communicate bidirectionally through the gut-brain axis.
- The vagus nerve is the primary pathway for this gut-brain communication.
- While gut-brain axis functionality is studied, gut microbiota diversity and stratification require further investigation.
Purpose of the Study:
- To review the role of gut microbiota diversity in depression.
- To explore the link between gut microbiota composition and the efficacy of selective serotonin receptor inhibitors (SSRIs).
- To identify microbial markers associated with depression severity.
Main Methods:
- Literature review of studies on gut microbiota, gut-brain axis, and depression.
- Analysis of research on SSRI efficacy and its relation to gut microbiota.
- Identification of microbial markers in depressive subjects.
Main Results:
- Specific bacterial species are consistently found in the stools of individuals with depression.
- Certain microbial markers can indicate depression severity.
- SSRIs appear to rely on the vagus nerve for their therapeutic effects in depression management.
Conclusions:
- Gut microbiota diversity plays a significant role in the gut-brain axis and depression.
- The vagus nerve is crucial for mediating the therapeutic effects of SSRIs.
- Targeting the gut microbiota may offer novel therapeutic strategies for depression.
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