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Study · Measured the body's own peptide · 1986

3 results

Vasopressin and oxytocin in the developing rat brain as shown by isoelectric focusing of radioimmunoassayable peptides.

van der Sluis PJ, Boer GJ, Swaab DF

Brain research1 Apr 1986Cited by 10 (Europe PMC)

PMID3955382 (opens in a new tab)DOI10.1016/0165-3806(86)90010-6 (opens in a new tab)PepBankPUB-03955382
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 the developing rat, oxytocin content became measurable only around prenatal day 20.

    In plain wordsIn rats, the body's own oxytocin could first be measured around day 20 before birth.

    Peptide
    Oxytocin
    Outcome
    Not applicableOnset of measurable oxytocin content in development
    Study

    ratn: not reported in source

    Outcome group
    Endogenous peptide levels · Endocrine and hormones

    Source sentences

    Summary
    Oxytocin content showed only measurable amounts around day 20 prenatally, reaching levels of, respectively, 10, 0.5 and 0.2 ng on postnatal day 14.
    1 context sentence
    Summary · context
    Vasopressin and oxytocin content were measured by radioimmunoassay in tissue extracts from rat pituitary, hypothalamus and the extrahypothalamic brain from gestational day 14 until postnatal day 14.

    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 the developing rat, oxytocin content reached 10 ng in the pituitary, 0.5 ng in the hypothalamus and 0.2 ng in the extrahypothalamic brain on postnatal day 14.

    In plain wordsIn rats, the body's own oxytocin rose to measurable amounts in the pituitary and brain by two weeks after birth.

    Peptide
    Oxytocin
    Outcome
    IncreaseOxytocin content on postnatal day 14
    Study

    ratn: not reported in source

    Outcome group
    Endogenous peptide levels · Endocrine and hormones

    Measurements

    Oxytocin content
    10 ng
    pituitary, postnatal day 14
    Oxytocin content
    0.5 ng
    hypothalamus, postnatal day 14
    Oxytocin content
    0.2 ng
    extrahypothalamic brain, postnatal day 14

    Source sentences

    Summary
    Oxytocin content showed only measurable amounts around day 20 prenatally, reaching levels of, respectively, 10, 0.5 and 0.2 ng on postnatal day 14.
    1 context sentence
    Summary · context
    Vasopressin and oxytocin content were measured by radioimmunoassay in tissue extracts from rat pituitary, hypothalamus and the extrahypothalamic brain from gestational day 14 until postnatal day 14.

    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 the developing rat, measurable oxytocin immunoreactivity had an isoelectric point similar to that of synthetic oxytocin.

    In plain wordsIn rats, the body's own oxytocin in tissue behaved like synthetic oxytocin in an identity test.

    Peptide
    Oxytocin
    Outcome
    Not applicableIsoelectric point of immunoreactive oxytocin
    Study

    ratn: not reported in source

    Outcome group
    Endogenous peptide levels · Endocrine and hormones

    Source sentences

    Summary
    Whenever measurable, immunoreactivity had an isoelectric point similar to that of synthetic vasopressin or oxytocin.
    1 context sentence
    Summary · context
    Vasopressin and oxytocin content were measured by radioimmunoassay in tissue extracts from rat pituitary, hypothalamus and the extrahypothalamic brain from gestational day 14 until postnatal day 14.

    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, 02:52 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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