Prostate Glands Contain Only Enkephalin Nerves, No Other Opioid Types
Human and canine prostates contained exclusively proenkephalin-derived opioid nerve fibers — no dynorphin or endorphin nerves — concentrated in the dorsolateral stroma.
Quick Facts
What This Study Found
Prostatic opioid innervation comes exclusively from proenkephalin-derived peptides. No prodynorphin or pro-opiomelanocortin products were detected in either species.
Key Numbers
How They Did This
Immunohistochemistry using polyclonal antisera against multiple opioid peptides was applied to prostate tissue from juvenile humans, adult humans, and adult dogs.
Why This Research Matters
This shows the prostate has a selective opioid nerve supply that may help regulate smooth muscle tone and blood flow. Understanding this could be relevant to prostate conditions.
The Bigger Picture
The prostate has its own opioid nerve supply that could influence urinary symptoms, ejaculation, and prostate disease. This may be relevant to opioid medication effects on urological function.
What This Study Doesn't Tell Us
This was an observational tissue study. It shows which peptides are present but not what they do. Sample sizes were small, typical for detailed histological studies.
Questions This Raises
- ?Do prostatic opioid nerves contribute to BPH symptoms?
- ?Could opioid receptors be targeted for prostate disease treatment?
Trust & Context
- Key Stat:
- Enkephalin-only innervation The prostate has a single opioid peptide family, not the three found in the brain
- Evidence Grade:
- Preliminary cross-sectional study with human and canine tissue — good cross-species validation.
- Study Age:
- Published in 1989 — established the opioid nerve supply of the prostate.
- Original Title:
- Regional distribution of opioidergic nerves in human and canine prostates.
- Published In:
- The Prostate, 14(3), 279-88 (1989)
- Authors:
- Aumüller, G(2), Jungblut, T(2), Malek, B(2), Konrad, S, Weihe, E
- Database ID:
- RPEP-00103
Evidence Hierarchy
A snapshot of a population at one point in time.
What do these levels mean? →Frequently Asked Questions
Do opioid drugs affect the prostate?
They can — opioid receptors on prostate nerves may affect smooth muscle contraction, secretion, and blood flow. This could contribute to urinary symptoms in opioid users.
Why only enkephalins and not other opioids?
Different tissues select specific opioid peptide families for local regulation. The prostate appears to use only the enkephalin system, which acts through delta opioid receptors.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-00103APA
Aumüller, G; Jungblut, T; Malek, B; Konrad, S; Weihe, E. (1989). Regional distribution of opioidergic nerves in human and canine prostates.. The Prostate, 14(3), 279-88.
MLA
Aumüller, G, et al. "Regional distribution of opioidergic nerves in human and canine prostates.." The Prostate, 1989.
RethinkPeptides
RethinkPeptides Research Database. "Regional distribution of opioidergic nerves in human and can..." RPEP-00103. Retrieved from https://rethinkpeptides.com/research/aumuller-1989-regional-distribution-of-opioidergic
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.