The Heart Makes Its Own Opioid Peptides That May Protect Against Heart Attacks
The heart produces enkephalins, dynorphins, and endorphins that act locally as autocrine/paracrine factors, potentially protecting cardiac tissue during ischemia and stress.
Quick Facts
What This Study Found
The heart produces and locally utilizes enkephalins, dynorphins, and endorphins as autocrine/paracrine cardioprotective factors, potentially mediating ischemic preconditioning.
Key Numbers
How They Did This
Review of evidence for cardiac opioid peptide production, localization, and function, including roles in ischemic preconditioning.
Why This Research Matters
If the heart's own opioid system protects against heart attacks, boosting this system could prevent cardiac damage. This also raises questions about how chronic opioid medication use affects heart health.
The Bigger Picture
The heart isn't just a muscle pump — it's an endocrine organ that produces its own protective peptides. Understanding cardiac opioids could lead to novel heart attack prevention strategies.
What This Study Doesn't Tell Us
Brief review. The relative importance of cardiac opioids compared to other cardioprotective mechanisms is uncertain. Most data from animal models.
Questions This Raises
- ?Can cardiac opioid release be pharmacologically enhanced for heart protection?
- ?Does chronic opioid drug use disrupt the heart's protective opioid system?
- ?Which opioid receptor mediates cardiac preconditioning?
Trust & Context
- Key Stat:
- Heart-made opioids The heart produces enkephalins, dynorphins, and endorphins locally that may protect against heart attack damage
- Evidence Grade:
- Moderate evidence from a review synthesizing molecular, pharmacological, and physiological data on cardiac opioid systems.
- Study Age:
- Published in 2000. Cardiac opioid signaling in ischemic preconditioning has been confirmed and is an active cardioprotection research area.
- Original Title:
- Cardiac opioids.
- Published In:
- Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.), 224(1), 1-7 (2000)
- Authors:
- Barron, B A
- Database ID:
- RPEP-00577
Evidence Hierarchy
Summarizes existing research on a topic.
What do these levels mean? →Frequently Asked Questions
The heart makes opioids?
Yes. The same pain-relieving peptides found in the brain are also produced by heart tissue. They don't cause the high associated with opioid drugs — instead, they appear to protect heart muscle from damage during reduced blood flow.
How does this protect against heart attacks?
Cardiac opioids may trigger ischemic preconditioning — making the heart more resistant to damage from reduced blood flow. This natural defense could be enhanced pharmacologically to prevent heart attack damage.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-00577APA
Barron, B A. (2000). Cardiac opioids.. Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.), 224(1), 1-7.
MLA
Barron, B A. "Cardiac opioids.." Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, 2000.
RethinkPeptides
RethinkPeptides Research Database. "Cardiac opioids." RPEP-00577. Retrieved from https://rethinkpeptides.com/research/barron-2000-cardiac-opioids
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.