[The effect of the delta sleep peptide and serotonin on the neurons of the snail].
Karpenko. L D LD; Aroian. E V EV; Mendzheritskiĭ. A M AM; Filin. N N NN
Key Findings
- DSIP suppresses spontaneous firing of snail neurons and reduces their response to electrical and tactile inputs in a dose‑dependent manner.
- Serotonin (5‑HT) excites the same neurons, showing opposite actions to DSIP.
- DSIP likely acts directly on neurons (not via serotonin pathways), possibly by increasing chloride conductance or affecting adenylate cyclase activity.
Practical Outcomes
- For biohackers, the study suggests DSIP can directly inhibit neuronal activity, which aligns with its reputation as a sleep‑promoting agent, but the work was done in snails and offers no direct dosing or safety guidance for humans. Until human data are available, the findings are interesting for mechanistic curiosity but not actionable for personal protocols.
Summary
In a snail study, the peptide called delta sleep‑inducing peptide (DSIP) was found to calm down nerve cells, making them less active and less responsive to stimulation, while serotonin did the opposite and excited the cells. The effect of DSIP grew stronger with higher doses and seemed to work directly on the nerves, not through the serotonin system, possibly by opening chloride channels or altering cellular signaling.
Abstract
The present paper describes the results concerning the influence of delta sleep-inducing peptide (DSIP) and serotonin (5-HT) on electrophysiological properties of the identified snail neurons. The experiments were performed on semi-intact preparations from Helix lucorum L. DSIP inhibited spontaneously active neurons and reduced responses of silent cells to depolarizing currents and tactile stimuli. DSIP effects were dose-dependent. 5-HT excited neurons in question. DSIP and 5-HT had the mutually opposite effects on the identified neurons. The results suggest that DSIP can directly affect the snail neurons not via serotoninergic system. Hyperpolarization effect of DSIP can be due to the enhancement of Cl conduction or to the changes in adenylatcyclase system activity. Alternatively DSIP can influence the process of synaptic transmission.
Study Information
pubmed
1994