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Study · Measured the body's own peptide · 1989

3 results

Vasopressin and oxytocin systems in the brain and upper spinal cord of Macaca fascicularis.

Caffé AR, Van Ryen PC, Van der Woude TP, Van Leeuwen FW

The Journal of comparative neurology1 Sept 1989Cited by 97 (Europe PMC)

PMID2778107 (opens in a new tab)DOI10.1002/cne.902870304 (opens in a new tab)PepBankPUB-02778107
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 adult Macaca fascicularis, immunocytochemistry found no oxytocin neurons outside the hypothalamus in the brain.

    In plain wordsIn macaque monkeys, the body's own oxytocin was made only in the hypothalamus of the brain, not in neurons elsewhere in the brain.

    Peptide
    Oxytocin
    Outcome
    Not applicableExtrahypothalamic oxytocin neurons
    Study

    Macaca fascicularisn: not reported in source

    Brain and upper spinal cord tissue (immunocytochemistry)
    Outcome group
    Endogenous peptide levels · Nervous system and cognition

    Source sentences

    Summary
    No extrahypothalamic OXT neurons were found in the brain of this macaque monkey.
    1 context sentence
    Summary · context
    This paper describes the vasopressin (VP) and oxytocin (OXT) immunoreactive structures in the brain and upper spinal cord of the adult male and female Macaca fascicularis.

    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

    In adult Macaca fascicularis, dense oxytocin fibre concentrations were present in the amygdala, solitary tract nuclei and the marginal layer of the cervical spinal cord.

    In plain wordsIn macaque monkeys, the body's own oxytocin fibres were dense in the amygdala, solitary tract nuclei and the outer layer of the neck spinal cord.

    Peptide
    Oxytocin
    Outcome
    Not applicableOxytocin fibre distribution
    Study

    Macaca fascicularisn: not reported in source

    Brain and upper spinal cord tissue (immunocytochemistry)
    Outcome group
    Endogenous peptide levels · Nervous system and cognition

    Source sentences

    Summary
    Dense concentrations of OXT fibers were demonstrated in the amygdala, NTS, and marginal layer of the cervical spinal cord.
    1 context sentence
    Summary · context
    This paper describes the vasopressin (VP) and oxytocin (OXT) immunoreactive structures in the brain and upper spinal cord of the adult male and female Macaca fascicularis.

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

  3. 03AnimalEndogenous levelAnimal study (in vivo)Other

    In male and female Macaca fascicularis, no sexual dimorphism was found in the oxytocin system.

    In plain wordsIn macaque monkeys, the body's own oxytocin system did not differ between males and females.

    Peptide
    Oxytocin
    Outcome
    No significant changeSexual dimorphism of the oxytocin system
    Study

    Macaca fascicularisn: not reported in source

    Brain and upper spinal cord tissue (immunocytochemistry)
    Outcome group
    Endogenous peptide levels · Nervous system and cognition

    Source sentences

    Summary
    No sexual dimorphism was found in this primate VP or OXT system.
    1 context sentence
    Summary · context
    This paper describes the vasopressin (VP) and oxytocin (OXT) immunoreactive structures in the brain and upper spinal cord of the adult male and female Macaca fascicularis.

    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.

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