[Hemodynamics as affected by delta-sleep-inducing peptide].
Pimenova. T I TI
Key Findings
- IV DSIP (60 nmol/kg) altered central hemodynamics in rabbits, showing two distinct response patterns (cardiac‑dominant vs vascular‑dominant).
- All observed changes in blood pressure, heart rate, and vascular tone remained within normal physiological limits.
- The data suggest a possible direct effect of DSIP on vascular tone, permeability, and myocardial contractility, though this was not definitively proven.
Practical Outcomes
- For biohackers, this study indicates that a single IV dose of DSIP at the tested level does not cause dangerous swings in blood pressure or heart function in rabbits, hinting at a reasonable safety margin. However, because the work is in animals and the effects were modest, it offers little direct guidance for human dosing or performance protocols.
Summary
A study in 20 male rabbits gave a single IV dose of delta‑sleep‑inducing peptide (DSIP) and watched how the heart and blood vessels reacted. Some rabbits showed mainly heart‑related changes, others mainly vessel‑related changes, but all the shifts stayed inside normal, healthy ranges. The researchers think DSIP might directly affect blood‑vessel tone and heart muscle strength, but they aren't sure.
Abstract
The study was performed on 20 male rabbits. The effect of intravenous delta-sleep-inducing peptide (DSIP), 60 nmol/kg in 5 ml of saline, on central hemodynamic parameters was studied in 11 experiments. Nine rabbits formed the control group. Two heterodirectional responses of the heart and vessels occurred in the animals given DSIP, which made them divide into 2 groups: those with a predominantly cardiac type of hemodynamic responses (n = 5) and animals with a predominantly vascular type of hemodynamic responses (n = 6). The results of the studies showed that DSIP affected central hemodynamics of intact animals; a direct action of DSIP on the vascular tone and permeability as well as on myocardial contractility cannot be excluded. The changes in hemodynamic parameters were, however, within the physiological normal range.
Study Information
pubmed
1991