Endomorphin-2's Supraspinal Pain Relief Involves Releasing Dynorphin A Through Mu-1 Receptors
Endomorphin-2's brain-level (supraspinal) analgesia was partly mediated by dynorphin A release through mu-1 opioid receptors, confirming the two endomorphins use different descending pain pathways.
Quick Facts
What This Study Found
Supraspinal endomorphin-2 antinociception involved dynorphin A release mediated by mu-1 receptors in the brain, with anti-dynorphin antibodies partially blocking the effect — confirming endomorphin-2's unique dual-pathway (mu + dynorphin) analgesic mechanism.
Key Numbers
How They Did This
animal-study study.
Why This Research Matters
Relevant for opioid-peptides, pain, neuropeptides.
The Bigger Picture
Advances peptide research.
What This Study Doesn't Tell Us
See abstract.
Questions This Raises
- ?Further research needed.
- ?Clinical translation to evaluate.
Trust & Context
- Key Stat:
- Key finding Supraspinal endomorphin-2 antinociception involved dynorphin A release mediated by mu-1 receptors in the brain, with anti-dynorphin antibodies partial
- Evidence Grade:
- preliminary evidence.
- Study Age:
- Published in 2008.
- Original Title:
- Possible involvement of dynorphin A release via mu1-opioid receptor on supraspinal antinociception of endomorphin-2.
- Published In:
- Peptides, 29(9), 1554-60 (2008)
- Authors:
- Sakurada, Shinobu(3), Sawai, Toshiki, Mizoguchi, Hirokazu(4), Watanabe, Hiroyuki, Watanabe, Chizuko, Yonezawa, Akihiko, Morimoto, Masaya, Sato, Takumi, Komatsu, Takaaki, Sakurada, Tsukasa
- Database ID:
- RPEP-01416
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
What was studied?
Endomorphin-2's Supraspinal Pain Relief Involves Releasing Dynorphin A Through Mu-1 Receptors
What was found?
Endomorphin-2's brain-level (supraspinal) analgesia was partly mediated by dynorphin A release through mu-1 opioid receptors, confirming the two endomorphins use different descending pain pathways.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-01416APA
Sakurada, Shinobu; Sawai, Toshiki; Mizoguchi, Hirokazu; Watanabe, Hiroyuki; Watanabe, Chizuko; Yonezawa, Akihiko; Morimoto, Masaya; Sato, Takumi; Komatsu, Takaaki; Sakurada, Tsukasa. (2008). Possible involvement of dynorphin A release via mu1-opioid receptor on supraspinal antinociception of endomorphin-2.. Peptides, 29(9), 1554-60. https://doi.org/10.1016/j.peptides.2008.04.012
MLA
Sakurada, Shinobu, et al. "Possible involvement of dynorphin A release via mu1-opioid receptor on supraspinal antinociception of endomorphin-2.." Peptides, 2008. https://doi.org/10.1016/j.peptides.2008.04.012
RethinkPeptides
RethinkPeptides Research Database. "Possible involvement of dynorphin A release via mu1-opioid r..." RPEP-01416. Retrieved from https://rethinkpeptides.com/research/sakurada-2008-possible-involvement-of-dynorphin
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.