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Volume 23, Issue 2
  • ISSN: 1570-159X
  • E-ISSN: 1875-6190

Abstract

Ghrelin is a gut peptide hormone associated with feeding behavior and energy homeostasis. Acylated ghrelin binds to the growth hormone secretagogue receptor 1a subtype (GHS-R1a) in the hippocampus, leading to GH release from the anterior pituitary. However, in recent years, ghrelin and its receptor have also been implicated in other processes, including the regulation of cardiomyocyte function, muscle trophism, and bone metabolism. Moreover, GHS-R1a is distributed throughout the brain and is expressed in brain areas that regulate the stress response and emotional behavior. Consistently, a growing body of evidence supports the role of ghrelin in regulating stress response and mood. Stress has consistently been shown to increase ghrelin levels, and despite some inconsistencies, both human and rodent studies suggested antidepressant effects of ghrelin. Nevertheless, the precise mechanism by which ghrelin influences stress response and mood remains largely unknown. Intriguingly, ghrelin and GHS-R1a were consistently reported to exert anti-inflammatory, antioxidant, and neurotrophic effects both and , although this has never been directly assessed in relation to psychopathology. In the present review we will discuss available literature linking ghrelin with the stress response and depressive-like behavior in animal models as well as evidence describing the interplay between ghrelin and neuroinflammation/oxidative stress. Although further studies are required to understand the mechanisms involved in the action of ghrelin on mood, we hypothesize that the anti-inflammatory and anti-oxidative properties of ghrelin may give a key contribution.

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2024-12-26

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/content/journals/cn/10.2174/1570159X22999240722095039
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Ghrelin, Neuroinflammation, Oxidative Stress, and Mood Disorders: What Are the Connections?
Curr. Neuropharmacol. 23, 172 (2025); https://doi.org/10.2174/1570159X22999240722095039
/content/journals/cn/10.2174/1570159X22999240722095039
/content/journals/cn/10.2174/1570159X22999240722095039
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  • Article Type:     Review Article
Keyword(s): antidepressant; Ghrelin; GHS-R1a; gut-brain axis; inflammation; mood disorders; oxidative stress; stress

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