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Study · Measured the body's own peptide · 1982

3 results

VIP (vasoactive intestinal polypeptide)--immunoreactive innervation of the portal vein.

Järhult J, Fahrenkrug J, Hellstrand P, Uddman R

Cell and tissue research1 Jan 1982Cited by 7 (Europe PMC)

PMID7055838 (opens in a new tab)DOI10.1007/bf00215705 (opens in a new tab)PepBankPUB-07055838
Publisher pagePubMedAsk about this study
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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 study3

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

Natural levels measured3

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 cats, guinea pigs, rats and mice, nerve fibres with VIP immunoreactivity were present in the portal vein wall.

    In plain wordsIn cats, guinea pigs, rats and mice, nerve fibres that contain the body's own VIP were found in the wall of the portal vein.

    Peptide
    Vasoactive intestinal peptide (VIP, aviptadil)
    Outcome
    Not applicableVIP-immunoreactive nerve fibres in portal vein wall
    Study

    cat, guinea pig, rat, mousen: not reported in source

    Outcome group
    Endogenous peptide levels · Cardiovascular

    Source sentences

    Summary
    Nerve fibres displaying immunoreactivity for vasoactive intestinal polypeptide (VIP) were found in the wall of the portal vein in cats, guinea pigs, rats and mice.

    This result measures the body's own Vasoactive intestinal peptide (VIP, aviptadil). Nobody was given the peptide. It is not evidence about taking it.

  2. 02AnimalEndogenous levelAnimal study (in vivo)Other

    Whole-mount preparations of the portal vein wall showed a sparse network of VIP fibres.

    In plain wordsIn animal tissue, the portal vein wall had only a thin network of nerve fibres that contain the body's own VIP.

    Peptide
    Vasoactive intestinal peptide (VIP, aviptadil)
    Outcome
    Not applicableDensity of VIP fibre network in portal vein wall
    Study

    cat, guinea pig, rat, mousen: not reported in source

    Outcome group
    Endogenous peptide levels · Cardiovascular

    Source sentences

    Summary
    In whole-mount preparations a sparse network of VIP fibres was seen in the vessel wall.

    This result measures the body's own Vasoactive intestinal peptide (VIP, aviptadil). Nobody was given the peptide. It is not evidence about taking it.

  3. 03LabEndogenous levelEx vivo tissueMechanism

    Electrical field stimulation of the rat portal vein in vitro caused a significant release of VIP.

    In plain wordsIn lab tests on rat portal vein, electrical stimulation made the tissue release its own VIP.

    Peptide
    Vasoactive intestinal peptide (VIP, aviptadil)
    Outcome
    IncreaseVIP release from rat portal vein on electrical field stimulation
    Study

    ratn: not reported in source

    Outcome group
    Endogenous peptide levels · Cardiovascular

    Source sentences

    Summary
    Electrical field stimulation of the rat portal vein in vitro caused a significant release of VIP.

    This result measures the body's own Vasoactive intestinal peptide (VIP, aviptadil). 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

    12 Oct 2026, 12:58 UTC

    Study results updated

  2. Version 1

    9 Oct 2026, 12:41 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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