Delta Opioid Receptors Selectively Inhibit Nerve-Driven Contractions in Human Colon
Delta opioid agonists selectively blocked nerve-stimulated colon contractions without affecting spontaneous muscle activity — showing nerve-specific opioid control of human gut.
Quick Facts
What This Study Found
Delta opioid receptor agonists selectively inhibited nerve-stimulated contractions in human colon tissue without affecting spontaneous contractile activity.
Key Numbers
How They Did This
Researchers used superfused strips of human sigmoid colon (both longitudinal and circular muscle). They applied delta opioid agonists and measured spontaneous activity and responses to electrical nerve stimulation.
Why This Research Matters
Understanding how opioid receptors control colon nerve signaling helps explain opioid-related constipation and could lead to better treatments for gut motility disorders.
The Bigger Picture
Understanding how different opioid receptor types affect human colon function is essential for managing opioid-induced constipation and developing gut-specific treatments.
What This Study Doesn't Tell Us
In vitro study using human tissue samples. The isolated tissue setting does not fully replicate how the colon functions inside the body with its full nerve supply and hormonal environment.
Questions This Raises
- ?Could delta-selective drugs be used to treat specific gut motility disorders?
- ?Do mu and kappa receptors have similar or different selectivity for nerve vs muscle activity?
Trust & Context
- Key Stat:
- Nerve-selective inhibition Delta agonists blocked nerve-stimulated contractions but not spontaneous muscle contractions — a precisely targeted effect
- Evidence Grade:
- Preliminary — in vitro human tissue study. Uses actual human colon tissue (strong) but in an isolated setting (limited).
- Study Age:
- Published in 1994 (32 years ago). Human tissue data remains valuable for translational relevance.
- Original Title:
- Delta-opioid receptor agonists inhibit neuromuscular transmission in human colon.
- Published In:
- European journal of pharmacology, 262(1-2), 33-9 (1994)
- Authors:
- Chamouard, P, Rohr, S, Meyer, C, Baumann, R, Angel, F
- Database ID:
- RPEP-00286
Evidence Hierarchy
Frequently Asked Questions
Why only nerve-driven contractions?
Delta opioid receptors appear to be located on nerve endings in the colon rather than on muscle cells. So they only affect contractions that depend on nerve signaling, not the muscle's own rhythmic activity.
How does this relate to constipation from opioids?
By selectively inhibiting nerve-driven contractions, opioids reduce the coordinated propulsive movements that move stool through the colon, while basic muscle tone continues.
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Cite This Study
https://rethinkpeptides.com/research/RPEP-00286APA
Chamouard, P; Rohr, S; Meyer, C; Baumann, R; Angel, F. (1994). Delta-opioid receptor agonists inhibit neuromuscular transmission in human colon.. European journal of pharmacology, 262(1-2), 33-9.
MLA
Chamouard, P, et al. "Delta-opioid receptor agonists inhibit neuromuscular transmission in human colon.." European journal of pharmacology, 1994.
RethinkPeptides
RethinkPeptides Research Database. "Delta-opioid receptor agonists inhibit neuromuscular transmi..." RPEP-00286. Retrieved from https://rethinkpeptides.com/research/chamouard-1994-deltaopioid-receptor-agonists-inhibit
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.