Ethanol and delta-sleep-inducing peptide: effects on brain monoamines.
Yukhananov. R Y RY; Tennilä. T M TM; Miroshnicenko. T I TI; Kudrin. V S VS; Ushakov. A N AN; Melnik. E I EI; Michaleva. I I II; Rayevsky. K S KS; Airaksinen. M M MM; Maisky. A I AI
Key Findings
- DSIP reduced serotonin (5‑HT) in the medial prefrontal cortex of both high‑active and low‑active rats.
- In high‑active rats, DSIP increased the dopamine metabolite HVA in the striatum without changing dopamine itself.
- Pre‑treating rats with DSIP amplified ethanol’s lowering effect on serotonin and altered ethanol’s impact on the serotonin metabolite 5‑HIAA in specific brain regions.
Practical Outcomes
- For biohackers, DSIP may have modest stress‑modulating properties, potentially influencing mood‑related neurotransmitters. However, the data are from rats and involve interactions with alcohol, so direct dosing recommendations for humans are not supported. It suggests caution if combining DSIP with alcohol, as it could intensify serotonin changes. More human research is needed before applying these findings to everyday protocols.
Summary
In rats that were either very active or less active in a forced‑swim test, the peptide delta‑sleep‑inducing peptide (DSIP) lowered serotonin levels in a brain area linked to mood and decision‑making, and in the more active rats it boosted a dopamine breakdown product (HVA). When DSIP was given before alcohol, it made alcohol’s drop in serotonin even stronger and changed how alcohol affected another serotonin metabolite. The study suggests DSIP can tweak brain chemicals tied to stress and alcohol response.
Abstract
The brain content of dopamine (DA) and its metabolites [dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA)] were the same in rats with different immobilization times in forced swimming test, while the serotonin (5-HT) concentration was higher in high active (HA, immobilization < 2 min) than low active (LA, immobilization > 5 min) animals. Ethanol (2 g/kg, PO) tended to increase the DA level in the striatum and nucleus accumbens in LA rats and decrease the 5-HT and 5-hydroxyindoleacetic acid (5-HIAA) concentration in HA rats. delta-Sleep-inducing peptide (DSIP) injection reduced the level of 5-HT in the medial prefrontal cortex (MFC) in both groups, did not affect the concentration of DA or DOPAC, but increased HVA in the striatum of HA rats. DSIP injected before ethanol administration augmented the ethanol effects on 5-HT in the MFC and attenuated the action of ethanol on 5-HIAA in the nucleus accumbens. A relationship between the different levels of voluntary alcohol consumption and sensitivity to stress among LA and HA rats and the differences in DA and 5-HT concentrations is suggested. The use of LA and HA rats in developing models for testing of stress-shielding compounds is also described.
Study Information
pubmed
1992
10.1016/0091-3057(92)90396-w