Skip to content

Study · Measured the body's own peptide · 1995

2 results

Delta sleep-inducing peptide in normal humans and in patients with sleep apnea and narcolepsy.

Vgontzas AN, Friedman TC, Chrousos GP, Bixler EO, Vela-Bueno A, Kales A

Peptides1 Jan 1995Cited by 2 (Europe PMC)

PMID8532601 (opens in a new tab)DOI10.1016/0196-9781(95)00092-x (opens in a new tab)PepBankPUB-08532601
Publisher pagePubMedAsk about this study
Jump to 2 results

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. 01HumanEndogenous levelObservational studyOther

    Morning plasma DSIP-like immunoreactivity did not differ significantly between patients with sleep apnea, patients with narcolepsy and normal controls.

    In plain wordsThe body's own DSIP-like levels in morning blood were similar in people with sleep apnea, people with narcolepsy and healthy controls.

    Peptide
    Delta sleep-inducing peptide (DSIP)
    Outcome
    No significant changeMorning plasma DSIP-LI in sleep apnea, narcolepsy and controls
    Study

    n = 30

    Outcome group
    Sleep · Sleep

    Source sentences

    Summary
    Comparisons between the three groups showed no significant differences, although there was a trend toward association with low levels of DSIP-LI in the narcoleptic group, particularly in patients not using medications.
    1 context sentence
    Summary · context
    We measured morning plasma concentrations of delta sleep-inducing-peptide-like-immunoreactivity (DSIP-LI) in 9 sleep apnea patients, 10 narcolepsy patients, and 11 normal controls.

    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. 02HumanEndogenous levelObservational studyOther

    In a second group, morning and evening plasma DSIP-like immunoreactivity did not differ between patients with sleep apnea and normal controls.

    In plain wordsIn a second group, the body's own DSIP-like levels in blood were similar in people with sleep apnea and healthy controls.

    Peptide
    Delta sleep-inducing peptide (DSIP)
    Outcome
    No significant changeMorning and evening plasma DSIP-LI in sleep apnea versus controls
    Study

    n = 19

    Outcome group
    Sleep · Sleep

    Source sentences

    Summary
    No differences were found in the morning or evening plasma DSIP-LI levels in a second group of 11 normal controls and 8 sleep apneics.

    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, 08:55 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.

Publication types

PepBank is a research reference. Talk to a doctor before you use any peptide.