Separation of tryptophan from DSIP, a Trp-nonapeptide, by adsorption to aluminum oxide.
Graf. M V MV; Saegesser. B B; Schoenenberger. G A GA
Key Findings
- DSIP’s first metabolic step is losing its N‑terminal tryptophan.
- Adsorption to aluminum oxide cleanly separates DSIP from free tryptophan.
- The new method allows rapid, quantitative measurement of DSIP degradation in plasma or serum.
Practical Outcomes
- For most DIY biohackers, the technique itself isn’t directly usable without lab equipment, but it paves the way for more reliable studies on DSIP dosing and metabolism. Knowing that DSIP can be measured accurately may eventually lead to better dosing guidelines and safety data for self‑experimentation.
Summary
Scientists figured out a simple way to pull the sleep‑inducing peptide DSIP apart from the amino acid tryptophan using aluminum oxide. This makes it easier to measure how quickly DSIP breaks down in blood, which could help future research on how the peptide works in the body.
Abstract
Delta sleep-inducing peptide (DSIP) has been found to induce sleep as well as extra-sleep effects. Although the presence of endogenous DSIP-like material has been demonstrated, the metabolic fate of injected DSIP has not been clarified so far. A major obstacle in monitoring degradation of DSIP has been the lack of an easy method to separate DSIP from tryptophan (Trp). Cleavage of the N-terminal Trp apparently represents the first and most important step in the metabolism of the peptide. Adsorption to aluminum oxide has been found to separate the two compounds and optimal conditions for the separation are described. Quantitative determination of the degradation of DSIP in plasma or serum is now rapidly achieved. The method should help to advance metabolic studies of DSIP. Other applications such as extraction of DSIP from solutions are also possible.
Study Information
pubmed
1986
1986-09-01T00:00:00.000Z
10.1016/0003-2697(86)90630-5
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