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Bidirectional gut-brain communication: A role for orexin-A
1Department of Psychobiology, and Mind, Brain, and Behavior Research Center (CIMCYC), University of Granada, Spain.
Neurochemistry International
|October 17, 2020
Summary
Orexin-A plays a key role in the gut-brain axis, influencing digestion, emotions, and inflammation. Targeting this orexinergic system may offer new therapies for gut disorders and related conditions.
Area of Science:
- Neurogastroenterology
- Neuroimmunology
- Endocrinology
Background:
- Bidirectional gut-brain signaling regulates homeostasis, emotions, and inflammation via neural, hormonal, and immunological pathways.
- Disruptions in the gut-brain axis are linked to obesity and inflammatory bowel diseases.
- Orexin-A is a key mediator in the gut-brain axis, connecting hypothalamic and peripheral functions.
Purpose of the Study:
- To explore the role of orexin-A in the gut-brain axis.
- To investigate the potential therapeutic applications of orexin-A in gastrointestinal and related disorders.
Main Methods:
- Review of existing literature on orexin-A signaling.
- Analysis of studies investigating orexin-A's effects on gastrointestinal functions.
- Examination of research on orexin-A's immunomodulatory and stress-related roles.
Main Results:
- Orexin-A regulates nutritional processes, gastric secretion, and feeding behaviors.
- Orexin-A modulates immune responses by reducing pro-inflammatory cytokines in models of colitis.
- Orexin-A is implicated in stress responses via the hypothalamic-pituitary-adrenal axis.
Conclusions:
- Orexin-A establishes an orexinergic gut-brain network with significant physiological roles.
- Orexin-A administration shows potential therapeutic value for irritable bowel syndrome and chronic intestinal inflammation.
- Targeting the orexinergic system may benefit patients with gastrointestinal disorders, behavioral issues, and cancer-related side effects.
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