The endogenous opioid system — including beta-endorphin, enkephalin, and dynorphin — plays a central role in alcohol craving, intake behavior, and genetic predisposition to alcohol abuse.
Three opioid systems linkedBeta-endorphin, enkephalin, and dynorphin are all implicated in alcohol craving and intake behavior
What the researchers found
The opioidergic system (beta-endorphin, enkephalin, dynorphin) is involved in both the pharmacological actions of alcohol and the craving/genetic predisposition toward alcohol abuse.
Why it matters
Understanding how the body's natural opioid peptides drive alcohol craving could lead to peptide-based interventions for alcohol use disorders.
How the study worked
Literature review synthesizing evidence on neurotransmitter systems — particularly opioid peptides, pineal gland function, and ventral tegmental area activity — and their relationship to ethanol intake in animal models.
What this study cannot tell us
As a review article, this synthesizes existing evidence without presenting new experimental data. Most evidence discussed comes from animal models rather than human clinical studies.
How to read the evidence
This is a narrative review summarizing animal and preclinical evidence. It synthesizes findings but does not present controlled clinical data.
When this study was published
Published in 1989, this is a foundational review. Many of its conclusions have since been validated by clinical naltrexone trials.
The bigger picture
This review helped establish the scientific basis for why opioid receptor blockers (like naltrexone) can reduce alcohol craving — the same opioid peptide pathways that provide natural reward also drive addictive drinking behavior.
Questions still open
- Could targeting specific opioid peptide subtypes provide more effective treatment for alcohol use disorder?
- How do individual genetic differences in opioid peptide expression affect alcohol abuse risk?
Common questions
How do opioid peptides relate to alcohol craving?
Is this related to why naltrexone helps with alcohol addiction?
Read the original research
Ethanol ingestive behavior as a function of central neurotransmission.
Experientia, 45(5), 444-52
Citation
Blum, K; Briggs, A H; Trachtenberg, M C. (1989). Ethanol ingestive behavior as a function of central neurotransmission.. Experientia, 45(5), 444-52.