Cited by 102Sleep and Wakefulness ResearchMemory and Neural MechanismsNeurotransmitter Receptor Influence on Behavior

Orexins and fear: Implications for the treatment of anxiety disorders

Flores, África, Saravia, Rocío, Maldonado, Rafael, Berrendero, Fernando·2015·Trends in Neurosciences

Abstract

An understanding of the neurobiological mechanisms involved in the regulation of fear is essential for the development of new treatments for anxiety disorders, such as phobias, panic, and post-traumatic stress disorders (PTSD). Orexins, also known as hypocretins, are neuropeptides located exclusively in hypothalamic neurons that have extensive projections throughout the central nervous system. Although this system was initially believed to be primarily involved in the regulation of feeding behavior, recent studies have shown that orexins also modulate neural circuits implicated in the expression and extinction of fear memories. Here, we discuss recent findings involving orexins in anxiety disorders and current clinical trials using orexin ligands that could be applied to identify new therapies for diseases characterized by pathological fear.

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Crossref · 10.1016/j.tins.2015.06.005

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  • Orexin receptor 1 and/or orexin receptor 2 are expressed in several brain areas engaged during anxiety and fear processing, including the hippocampus, amygdala and mPFC.

    “The orexin receptor 1 and/or orexin receptor 2 receptor are expressed in several brain areas that are engaged during anxiety and fear processing including the hippocampus, amygdala and mPFC (Flores, Saravia, Maldonado, & Berrendero, 2015;Marcus et al., 2001).”

    From Novel pharmacological targets in drug development for the treatment of anxiety and anxiety-related disorders (2019) · cites this paper as Flores, Saravia, Maldonado, & Berrendero, 2015

  • Activation of the orexin system is involved in the expression and consolidation of fear while it counteracts fear extinction.

    “Furthermore, activation of the orexin system has been shown to be involved in the expression and consolidation of fear while it counteracts fear extinction (Flores et al., 2015).”

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Authors
Flores, Á., Saravia, R., Maldonado, R., & Berrendero, F.
Affiliations
Universitat Pompeu Fabra (ES)
Venue
Trends in Neurosciences
Publisher
Elsevier BV
Published
2015-09
Volume
38
Issue
9
Pages
550-559
ISSN
0166-2236 (ISSN-L)
OpenAlex
W1696117693
Cited by
102
References
101
Citations by year
2026: 4 · 2025: 11 · 2024: 4 · 2023: 8 · 2022: 12 · 2021: 9 · 2020: 14 · 2019: 10 · 2018: 15 · 2017: 9 · 2016: 6
FWCI
0.98
Type
journal article
Language
en
Open access
closed
Locations
  • Trends in Neurosciences (publishedVersion)
  • PubMed (publishedVersion)
  • Repositori digital de la UPF (Universitat Pompeu Fabra) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
orexin, fear regulation, anxiety disorders, fear extinction, phobia, panic disorder, post-traumatic stress disorder, hypothalamus
MeSH terms
Orexins, Animals, Anxiety Disorders, Brain, Fear, Humans

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