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Study · Measured the body's own peptide · 1984

2 results

DSIP-like material in brain parts of rats running a complex maze.

Kastin AJ, Dickson JC, Fischman AJ

Physiology & behavior1 Sept 1984Cited by 4 (Europe PMC)

PMID6549074 (opens in a new tab)DOI10.1016/0031-9384(84)90165-3 (opens in a new tab)PepBankPUB-06549074
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Summary

The text of this summary is not shown here, because the article license does not allow reuse. Read it at the source (opens in a new tab)

Text rights: Publisher copyright. Results still quote short attributed sentences.

Results from this study2

No result from this study comes from a test of the peptide.

Natural levels measured2

These results measure the body's own peptide. Nobody was given the peptide. They are not evidence about taking it. They are left out of key results, evidence counts and charts.

  1. 01AnimalEndogenous levelAnimal study (in vivo)Other

    In rat brain, the thalamus held a high level of DSIP-LI, with a peak eluting at the position of synthetic DSIP after HPLC.

    In plain wordsIn rats, the thalamus held high levels of the body's own DSIP-like material, matching synthetic DSIP in a lab separation.

    Peptide
    Delta sleep-inducing peptide (DSIP)
    Outcome
    Not applicableDSIP-LI in thalamus and HPLC elution position
    Study

    ratn: not reported in source

    rat brain areas, RIA, 12-choice maze
    Outcome group
    Endogenous peptide levels · Nervous system and cognition

    Source sentences

    Summary
    One of the areas found to contain a high level of DSIP-LI was the thalamus, where a distinct peak of immunoreactivity eluted at the position of the synthetic DSIP nonapeptide after high performance liquid chromatography (HPLC).
    1 context sentence
    Summary · context
    Delta sleep-inducing peptide-like immunoreactivity (DSIP-LI) was measured by radioimmunoassay (RIA) in individual brain areas of rats running a 12-choice maze.

    This result measures the body's own Delta sleep-inducing peptide (DSIP). Nobody was given the peptide. It is not evidence about taking it.

  2. 02AnimalEndogenous levelAnimal study (in vivo)Other

    In rats running a maze, thalamic DSIP-LI correlated significantly with running times on each of two test days.

    In plain wordsIn rats, the body's own DSIP-like material in the thalamus was linked to maze running times.

    Peptide
    Delta sleep-inducing peptide (DSIP)
    Outcome
    Not applicableCorrelation of thalamic DSIP-LI with maze running time
    Study

    ratn: not reported in source

    rat brain areas, RIA, 12-choice maze
    Outcome group
    Cognition and memory · Nervous system and cognition

    Source sentences

    Summary
    On each of the two days of testing, DSIP-LI in the thalamus correlated significantly with running times in the maze.
    1 context sentence
    Summary · context
    Delta sleep-inducing peptide-like immunoreactivity (DSIP-LI) was measured by radioimmunoassay (RIA) in individual brain areas of rats running a 12-choice maze.

    This result measures the body's own Delta sleep-inducing peptide (DSIP). Nobody was given the peptide. It is not evidence about taking it.

AI wrote and checked these results. AI can make mistakes, so check important results against the source.

Version history

PepBank keeps every version of the data on this study. Status changes from Retraction Watch, Europe PMC and Crossref are listed with their source.

  1. Version 2Current

    10 Oct 2026, 09:43 UTC

    Study results updated

  2. Version 1

    9 Oct 2026, 03:04 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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