Skip to content

Study · Measured the body's own peptide · 1988

2 results

Phylogenetic study of the oxytocin-like immunoreactive system in invertebrates.

Mizuno J, Takeda N

Comparative biochemistry and physiology. A, Comparative physiology1 Jan 1988Cited by 7 (Europe PMC)

PMID2907439 (opens in a new tab)DOI10.1016/0300-9629(88)90958-9 (opens in a new tab)PepBankPUB-02907439
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. 01AnimalEndogenous levelAnimal study (in vivo)Other

    Oxytocin-like immunoreactivity was detected in nerve cells of Hydra, two annelids, three molluscs and one arthropod species.

    In plain wordsIn some invertebrates, nerve cells showed staining for a substance like the body's own oxytocin.

    Peptide
    Oxytocin
    Outcome
    Not applicableOxytocin-like immunoreactivity in nerve cells of invertebrates
    Study

    invertebrates (several species)n: not reported in source

    Central nervous system (PAP immunohistochemistry)
    Outcome group
    Endogenous peptide levels · Nervous system and cognition

    Source sentences

    Summary
    The immunoreactivity was detected in the nerve cells of Hydra magnipapillata of the Coelenterata; Neanthes japonica and Pheretima communissima of the Annelida; Oncidium verrucosum, Limax marginatus and Meretrix lamarckii of the Mollusca; and Baratha brassica of the Arthropoda.
    1 context sentence
    Summary · context
    A phylogenetic study of oxytocin (OXT)-like immunoreactive cells was performed by the PAP method in the central nervous system of invertebrates.

    This result measures the body's own Oxytocin. Nobody was given the peptide. It is not evidence about taking it.

  2. 02AnimalEndogenous levelAnimal study (in vivo)Other

    No oxytocin-like immunoreactive cells were found in several other invertebrate species, including a platyhelminth, molluscs, arthropods, an echinoderm and a protochordate.

    In plain wordsIn other invertebrates, nerve cells showed no staining for a substance like the body's own oxytocin.

    Peptide
    Oxytocin
    Outcome
    No significant changeAbsence of oxytocin-like immunoreactivity in other invertebrates
    Study

    invertebrates (several species)n: not reported in source

    Central nervous system (PAP immunohistochemistry)
    Outcome group
    Endogenous peptide levels · Nervous system and cognition

    Source sentences

    Summary
    No immunoreactive cells were found in Bipalium sp. of the Platyhelminthes; Pomacea canaliculata, Aplysia kurodai, Bradybaena similaris and Achatina fulica of the Mollusca; and Gnorimosphaeroma rayi, Procambarus clarkii, Hemigrapsus sanguineus, Helice tridens and Gryllus bimaculatus of the Arthropoda…
    1 context sentence
    Summary · context
    A phylogenetic study of oxytocin (OXT)-like immunoreactive cells was performed by the PAP method in the central nervous system of invertebrates.

    This result measures the body's own Oxytocin. 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

    11 Oct 2026, 20:03 UTC

    Study results updated

  2. Version 1

    9 Oct 2026, 02:53 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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