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Study · Measured the body's own peptide · 1987

1 result

Vasoactive intestinal polypeptide levels and distribution in the penis of old rats.

Amenta F, Cavallotti C, De Rossi M, Ferrante F, Geppetti P

Journal of neural transmission1 Jan 1987Cited by 4 (Europe PMC)

PMID3312494 (opens in a new tab)DOI10.1007/bf01252515 (opens in a new tab)PepBankPUB-03312494
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 study1

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

Natural levels measured1

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 Wistar rats, no significant changes in tissue VIP concentrations or distribution occurred in the penis of old rats compared with young-adult rats.

    In plain wordsIn rats, the body's own VIP level and location in the penis did not differ between old and young rats.

    Peptide
    Vasoactive intestinal peptide (VIP, aviptadil)
    Outcome
    No significant changePenile VIP concentration and distribution in old versus young rats
    Study

    ratn: not reported in source

    Penis of young-adult and old Wistar rats
    Comparator
    Young-adult rats
    Outcome group
    Endogenous peptide levels · Reproductive and sexual health

    Source sentences

    Summary
    No significant changes in tissue VIP concentrations or distribution occurred in the penis of old rats compared to young-adult rats.
    1 context sentence
    Summary · context
    Vasoactive intestinal polypeptide (VIP) levels and distribution were studied in the penis of young-adult (3-month-old) and old (30-month-old) Wistar rats by radioimmunoassay and immunofluorescence.

    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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