Endogenous opioid peptides (endorphins, enkephalins, dynorphins) modulate the HPA stress axis response, with opioid system disruption (from chronic pain, addiction, or stress) altering stress hormone reactivity.
Key findingEndogenous opioid peptides regulate HPA axis stress reactivity through hypothalamic CRF and ACTH modulation, with opioid system disruption producing a
What the researchers found
Endogenous opioid peptides regulate HPA axis stress reactivity through hypothalamic CRF and ACTH modulation, with opioid system disruption producing altered cortisol responses — explaining stress hormone dysregulation in chronic pain, addiction, and stress disorders.
Why it matters
Relevant for opioid-peptides, neuropeptides, anxiety-mood.
How the study worked
animal-study study.
What this study cannot tell us
See abstract.
How to read the evidence
moderate evidence.
When this study was published
Published in 2008.
The bigger picture
Advances peptide research.
Questions still open
- Further research needed.
- Clinical translation to evaluate.
Common questions
What was studied?
What was found?
Read the original research
Control of hormonal stress reactivity by the endogenous opioid system.
Psychoneuroendocrinology, 33(4), 425-36
Citation
Bilkei-Gorzo, Andras; Racz, Ildiko; Michel, Kerstin; Mauer, Daniela; Zimmer, Anne; Klingmüller, Dietrich; Zimmer, Andreas. (2008). Control of hormonal stress reactivity by the endogenous opioid system.. Psychoneuroendocrinology, 33(4), 425-36. https://doi.org/10.1016/j.psyneuen.2007.12.010