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Related Concept Videos

Hypothalamic-Pituitary Axis01:37

Hypothalamic-Pituitary Axis

The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
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Physiological Foundation of Stress01:24

Physiological Foundation of Stress

Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
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Certain drugs can affect how neurotransmitters called catecholamines, are released or taken back up in the adrenergic neuron. They can have different effects on the body's sympathetic transmission. Reserpine, a natural compound found in the Rauwolfia shrub, blocks a transporter called vesicular monoamine transporter (VMAT), which leads to a buildup of catecholamines in the cell and reduces sympathetic transmission. Another drug called guanethidine works in multiple ways, including blocking...
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Related Experiment Video

Updated: May 7, 2026

Restraint to Induce Stress in Mice and Rats
03:48

Restraint to Induce Stress in Mice and Rats

Published on: December 6, 2024

Neuropeptide-catecholamine interactions in stress.

Lee E Eiden1

  • 1Section on Molecular Neuroscience, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health Intramural Research Program, Bethesda, Maryland, USA.

Advances in Pharmacology (San Diego, Calif.)
|September 24, 2013
PubMed
Summary

Neuropeptides and catecholamines are key neurotransmitters in stress response systems. Their interactions influence adaptation and maladaptation, impacting mental health conditions like anxiety and depression.

Keywords:
CRHNeuropeptideNorepinephrinePACAPStress

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Endocrinology

Background:

  • Neuropeptides and catecholamines function as critical neurotransmitters in the central and peripheral nervous systems.
  • These neurotransmitters are integral to mediating both immediate and long-term responses to systemic and psychological stress.

Purpose of the Study:

  • To summarize the complex interactions between catecholamines and neuropeptides within specific neural circuits.
  • To provide a foundation for understanding the neurobiological underpinnings of stress adaptation and maladaptation.

Main Methods:

  • Review and synthesis of existing literature on neuropeptide and catecholamine signaling in stress pathways.
  • Focus on neural circuits involved in the stress response.

Main Results:

  • Detailed description of the interplay between neuropeptides and catecholamines in stress-mediated neural circuits.
  • Highlighting how these interactions contribute to adaptive and maladaptive outcomes.

Conclusions:

  • The interactions between neuropeptides and catecholamines are crucial for understanding stress responses.
  • Dysregulation in these pathways can lead to behavioral disorders such as anxiety, depression, and PTSD.