[Effect of the delta-sleep peptide on parasympathetic regulation of the cardiac rhythm].
Zviagintseva. M A MA; Kosharskaia. I L IL; Ul'ianinskiĭ. L S LS
Key Findings
- IV administration of DSP (60 nM/kg) reduced rabbit heart rate by ~16%.
- The heart‑rate drop was eliminated by atropine, indicating a vagal (parasympathetic) mechanism.
- DSP amplified the negative chronotropic effect when the vagus nerve was directly stimulated, suggesting a protective role under emotional stress.
Practical Outcomes
- The study hints that DSP could be a tool for lowering heart rate and buffering stress‑related cardiac strain, but it’s only been shown in rabbits with an IV dose. No human safety or oral/other delivery data exist, so it isn’t ready for self‑experimentation or protocol design. Enthusiasts should treat this as early‑stage evidence and wait for more translational research before considering use.
Summary
In a rabbit study, giving the delta‑sleep peptide (DSP) through an IV lowered the heart rate by about 16%. This slowdown was stopped when the animals were given atropine, which blocks the vagus nerve, showing that DSP works through the parasympathetic (vagal) system. The researchers think DSP might protect the heart during stressful situations, but the work was done in animals and used an IV dose that isn’t practical for people.
Abstract
Effect of delta-sleep peptide (60 nM/kg) on the parasympathetic regulation of cardiac activity has been studied in the experiments on rabbits. It has been established that intravenous administration of this peptide to voluntary-behaving animals results in heart rate reduction by an average of 16%, that can be eliminated by atropine. Delta-sleep peptide has been demonstrated to intensify negative chronotropic effect in the case of directly irritated wandering nerve. The data obtained explain a protective effect of delta-sleep peptide on the heart under emotional stress.
Study Information
pubmed
1986