Ethanol modifies the production, processing, and release of endorphins, enkephalins, and dynorphins differently depending on acute vs chronic exposure.
Acute vs chronic: opposite effectsAlcohol initially boosts endorphins but chronic use disrupts all three opioid systems
What the researchers found
Ethanol modifies the biosynthesis, post-translational processing, and release of all three opioid peptide families differently depending on acute versus chronic exposure.
Why it matters
Understanding how alcohol hijacks the opioid system helps explain both why people drink and why some become addicted. This knowledge supported development of opioid-based treatments for alcoholism.
How the study worked
Literature review summarizing animal and human studies on alcohol's effects on endorphin, enkephalin, and dynorphin systems.
What this study cannot tell us
This is a 1989 review drawing mainly from animal studies. Understanding of alcohol-opioid interactions has grown substantially since.
How to read the evidence
Preliminary — narrative review of animal and human studies.
When this study was published
Published in 1989 — important framework for understanding alcohol-opioid interactions.
The bigger picture
Understanding how alcohol affects the opioid system explains why naltrexone (opioid blocker) helps treat alcoholism and why alcohol withdrawal feels so terrible — the opioid system becomes dependent on alcohol.
Questions still open
- Can opioid system profiling predict alcoholism risk?
- Could targeted opioid therapy prevent alcohol relapse?
Common questions
Why does alcohol feel good initially?
Why is alcohol withdrawal so painful?
Read the original research
The effect of ethanol on the biosynthesis and regulation of opioid peptides.
Experientia, 45(5), 428-35
Citation
Gianoulakis, C. (1989). The effect of ethanol on the biosynthesis and regulation of opioid peptides.. Experientia, 45(5), 428-35.