[Influence of delta-sleep-inducing peptide on the activity of proteolytic enzymes in the rat brain under hypokinesia].
Mendzheritskiĭ. A M AM; Lysenko. A V AV; Mikhaleva. I I II
Key Findings
- DSIP (12 µg/100 g) raises neutral proteinase and cathepsin D activity in the brains and blood of normal rats.
- Prolonged inactivity (hypokinesia) disrupts neutral and acidic proteinase activity and causes cathepsin D to leak from lysosomes into the cell fluid.
- A single DSIP injection normalizes the cathepsin D ratio after 1 hour of inactivity and restores neutral protease activity after 6 hours of inactivity.
Practical Outcomes
- For biohackers, the study offers only a very indirect hint that DSIP might influence brain protein‑breakdown pathways during short periods of low activity. There is no clear dosage, safety, or protocol for humans, so it’s not ready for practical use in longevity or performance regimens.
Summary
A single dose of delta‑sleep‑inducing peptide (DSIP) in rats boosts certain brain enzymes that break down proteins. When the rats are inactive (hypokinesia), these enzymes behave oddly and the peptide can partly bring them back toward normal levels, but only in specific short‑term inactivity scenarios.
Abstract
Single administration of the delta-sleep-inducing peptide (DSIP) in a dose of 12 micrograms/100 g to intact animals makes the activity of neutral proteinases and cathepsin D higher in the rat brain and blood serum. Hypokinesia of different duration changes activity of neutral and acidic proteinases and induces accessibility of cathepsin D to the cytosol as a result of damage in lysosomal membrane. Injection DSIP induces a decrease A/B of cathepsin D to the control level under 1-h hypokinesia condition and normalizes the neutral proteolytic activity under 6-h hypokinesia condition.
Study Information
pubmed
1992