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Study · Measured the body's own peptide · 1984

8 results

Oxytocin in the corpus luteum of the cynomolgus monkey (Macaca fascicularis).

Khan-Dawood FS, Marut EL, Dawood MY

Endocrinology1 Aug 1984Cited by 25 (Europe PMC)

PMID6745170 (opens in a new tab)DOI10.1210/endo-115-2-570 (opens in a new tab)PepBankPUB-06745170
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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 study8

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

Natural levels measured6

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 cynomolgus monkey corpora lutea, total oxytocin content was 1.9 +/- 0.5 ng.

    In plain wordsIn cynomolgus monkeys, the body's own oxytocin in the corpus luteum was measured at 1.9 +/- 0.5 ng.

    Peptide
    Oxytocin
    Outcome
    Not applicableTotal oxytocin content in corpus luteum
    Study

    cynomolgus monkey (Macaca fascicularis)n: not reported in source

    corpus luteum
    Outcome group
    Sex hormones and fertility · Reproductive and sexual health

    Measurements

    Oxytocin content
    1.9 ng
    corpus luteum

    Source sentences

    Summary
    Total content of OT in corpus luteum was 1.9 +/- 0.5 ng (mean +/- SEM)

    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 cynomolgus monkey corpora lutea, oxytocin concentrations were 21.0-75.2 ng/g wet wt early, 34.4-602.5 ng/g midluteal, and 3.4-117.4 ng/g wet wt late in the luteal phase.

    In plain wordsIn cynomolgus monkeys, the body's own corpus-luteum oxytocin was 21.0-75.2 early, 34.4-602.5 midluteal, and 3.4-117.4 ng/g wet wt late.

    Peptide
    Oxytocin
    Outcome
    MixedCorpus luteum oxytocin concentration across luteal phase
    Study

    cynomolgus monkey (Macaca fascicularis)n: not reported in source

    corpus luteum
    Outcome group
    Sex hormones and fertility · Reproductive and sexual health

    Source sentences

    Summary
    OT concentrations in corpus luteum were 21.0-75.2 ng/g wet wt in early luteal phase, increasing to 34.4-602.5 ng/g in midluteal phase; and declining to 3.4-117.4 ng/g in late luteal phase.

    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 cynomolgus monkey corpora lutea, oxytocin concentrations per mg protein were 0.05-19.6 ng, with peak concentrations of 14.7-19.6 ng/mg protein on day 22.

    In plain wordsIn cynomolgus monkeys, the body's own corpus-luteum oxytocin was 0.05-19.6 ng/mg protein, peaking at 14.7-19.6 on day 22.

    Peptide
    Oxytocin
    Outcome
    IncreaseCorpus luteum oxytocin concentration per mg protein
    Study

    cynomolgus monkey (Macaca fascicularis)n: not reported in source

    corpus luteum
    Outcome group
    Sex hormones and fertility · Reproductive and sexual health

    Source sentences

    Summary
    OT concentrations per mg protein in the corpus luteum were 0.05-19.6 ng with peak concentrations of 14.7-19.6 ng/mg protein on day 22.

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

  4. 04AnimalEndogenous levelAnimal study (in vivo)Other

    In cynomolgus monkeys, ovarian-vein oxytocin was 161.2 +/- 29.7 pg/ml on days 15-24 versus 16.8 +/- 3.6 pg/ml on days 25-28 (P less than 0.01).

    In plain wordsIn cynomolgus monkeys, the body's own ovarian-vein oxytocin was higher on days 15-24 than on days 25-28.

    Peptide
    Oxytocin
    Outcome
    IncreaseOvarian vein oxytocin concentration by luteal phase
    Study

    cynomolgus monkey (Macaca fascicularis)n: not reported in source

    ovarian venous plasma
    Comparator
    Days 25-28 of the luteal phase
    Outcome group
    Sex hormones and fertility · Reproductive and sexual health

    Source sentences

    Summary
    Ovarian vein blood from the same side as the corpus luteum had a significantly higher OT concentrations of 161.2 +/- 29.7 pg/ml on days 15-24 than 16.8 +/- 3.6 pg/ml on days 25-28 (P less than 0.01) and peripheral plasma OT levels of 23.2 +/- 3.4 pg/ml (P less than 0.025).

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

  5. 05AnimalEndogenous levelAnimal study (in vivo)Other

    In cynomolgus monkeys, ovarian-vein oxytocin was 161.2 +/- 29.7 pg/ml on days 15-24 versus peripheral plasma oxytocin of 23.2 +/- 3.4 pg/ml (P less than 0.025).

    In plain wordsIn cynomolgus monkeys, the body's own ovarian-vein oxytocin was higher than peripheral blood oxytocin.

    Peptide
    Oxytocin
    Outcome
    IncreaseOvarian vein versus peripheral plasma oxytocin concentration
    Study

    cynomolgus monkey (Macaca fascicularis)n: not reported in source

    ovarian venous and peripheral plasma
    Comparator
    Peripheral plasma oxytocin levels
    Outcome group
    Sex hormones and fertility · Reproductive and sexual health

    Source sentences

    Summary
    Ovarian vein blood from the same side as the corpus luteum had a significantly higher OT concentrations of 161.2 +/- 29.7 pg/ml on days 15-24 than 16.8 +/- 3.6 pg/ml on days 25-28 (P less than 0.01) and peripheral plasma OT levels of 23.2 +/- 3.4 pg/ml (P less than 0.025).

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

  6. 06AnimalEndogenous levelAnimal study (in vivo)Other

    In cynomolgus monkey corpora lutea, total oxytocin content ranged from 0.4-0.8 ng early, 1.0-6.2 ng midluteal, and 0.4-0.7 ng late in the luteal phase.

    In plain wordsIn cynomolgus monkeys, the body's own corpus-luteum oxytocin ranged from 0.4-0.8 ng early, 1.0-6.2 ng midluteal, and 0.4-0.7 ng late.

    Peptide
    Oxytocin
    Outcome
    MixedTotal corpus luteum oxytocin content across luteal phase
    Study

    cynomolgus monkey (Macaca fascicularis)n: not reported in source

    corpus luteum
    Outcome group
    Sex hormones and fertility · Reproductive and sexual health

    Source sentences

    Summary
    Total content of OT in corpus luteum was 1.9 +/- 0.5 ng (mean +/- SEM) with a content of 0.4-0.8 ng in early luteal phase, 1.0-6.2 ng in midluteal phase, and 0.4-0.7 ng in late luteal phase.

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

Studies that did not test the peptide alone2

In this study, Oxytocin was a lab tool or a carrier, part of a mix, or the subject of a lab method. These results are not evidence about taking Oxytocin.

  1. 07LabNot a test of Oxytocin aloneEx vivo tissueOther

    In a cynomolgus monkey corpus-luteum extract, serial dilution showed parallelism with standard oxytocin in the radioimmunoassay.

    In plain wordsIn lab testing of monkey corpus-luteum extract, dilution behaved like the oxytocin standard.

    Peptide
    Oxytocin
    Outcome
    Not applicableParallelism of corpus-luteum extract with oxytocin standard in radioimmunoassay
    Study

    cynomolgus monkey (Macaca fascicularis)n: not reported in source

    corpus luteum extract
    Comparator
    Standard oxytocin
    Outcome group
    Receptor activity and mechanism · Reproductive and sexual health

    Source sentences

    Summary
    Serial dilution of acetic acid extract of the corpus luteum showed parallelism with standard OT in the RIA.

    In this study, Oxytocin was a lab tool or a carrier, part of a mix, or the subject of a lab method. This result is not evidence about taking Oxytocin.

  2. 08LabNot a test of Oxytocin aloneEx vivo tissueOther

    In cynomolgus monkey corpus-luteum extract, Sephadex G-25 chromatography showed a single binding-activity peak similar to synthetic oxytocin in the radioimmunoassay.

    In plain wordsIn lab testing of monkey corpus-luteum extract, chromatography showed one peak like synthetic oxytocin.

    Peptide
    Oxytocin
    Outcome
    Not applicableOxytocin-immunoreactive peak in corpus-luteum extract chromatography
    Study

    cynomolgus monkey (Macaca fascicularis)n: not reported in source

    corpus luteum extract
    Comparator
    Synthetic oxytocin
    Outcome group
    Receptor activity and mechanism · Reproductive and sexual health

    Source sentences

    Summary
    Sephadex G-25 column chromatography of the corpus luteum extract revealed a single peak for binding activity similar to that of synthetic OT on the RIA.

    In this study, Oxytocin was a lab tool or a carrier, part of a mix, or the subject of a lab method. This result is not evidence about taking Oxytocin.

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, 02:54 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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