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Study · Measured the body's own peptide · 1991

5 results

Prostaglandin-induced secretion of oxytocin and prolactin in red (Cervus elaphus) and Pere David's (Elaphurus davidianus) deer hinds: evidence for oxytocin of luteal origin.

Flint AP, Sheldrick EL, McCann TJ, Brinklow BR, Loudon AS

General and comparative endocrinology1 Sept 1991Cited by 3 (Europe PMC)

PMID1936924 (opens in a new tab)DOI10.1016/0016-6480(91)90149-z (opens in a new tab)PepBankPUB-01936924
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 study5

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

Natural levels measured5

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 one mid-luteal red deer hind, the corpus luteum held oxytocin at a concentration of 66 nmol/g wet weight.

    In plain wordsIn one red deer, the ovary's corpus luteum held the body's own oxytocin.

    Peptide
    Oxytocin
    Outcome
    Not applicableOxytocin concentration in corpus luteum
    Study

    red deern = 1

    Outcome group
    Sex hormones and fertility · Reproductive and sexual health

    Measurements

    Oxytocin concentration
    66 nmol/g wet wt
    corpus luteum

    Source sentences

    Summary
    The concentration of oxytocin in a single corpus luteum removed at laparotomy from one red deer hind at the mid-luteal phase of the cycle was 66 nmol/g wet wt; identification was authenticated by HPLC.

    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 female red deer, the body's own plasma oxytocin was higher in the luteal phase than in the follicular phase or seasonal anoestrus.

    In plain wordsIn female red deer, natural oxytocin levels in blood were higher in the luteal phase than in the follicular phase or anoestrus.

    Peptide
    Oxytocin
    Outcome
    IncreasePlasma oxytocin by cycle phase
    Study

    red deern: not reported in source

    Outcome group
    Sex hormones and fertility · Reproductive and sexual health

    Measurements

    Plasma oxytocin
    9.3 fmol/ml
    luteal phase
    Plasma oxytocin
    3.1 fmol/ml
    follicular phase
    Plasma oxytocin
    3.2 fmol/ml
    seasonal anoestrus

    Source sentences

    Summary
    Peripheral plasma concentrations of oxytocin in female red deer during the luteal phase of the oestrous cycle (9.3 +/- 2.1 fmol/ml) exceeded those in the follicular phase (3.1 +/- 1.4) or during seasonal anoestrus (3.2 +/- 1.3).

    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 mid-luteal red deer hinds, cloprostenol raised the body's own circulating oxytocin within 5 min of treatment.

    In plain wordsIn red deer, a prostaglandin drug raised the body's own oxytocin levels in blood within minutes.

    Peptide
    Oxytocin
    Outcome
    IncreasePlasma oxytocin after cloprostenol in red deer
    Study

    red deern: not reported in source

    Outcome group
    Sex hormones and fertility · Reproductive and sexual health

    Measurements

    Plasma oxytocin before
    8.1 fmol/ml
    red deer
    Plasma oxytocin after
    97 fmol/ml
    red deer

    Source sentences

    Summary
    Mean (+/- SEM) concentrations increased from 8.1 +/- 0.7 to 97 +/- 8 fmol/ml in red and from 6.2 +/- 0.7 to 153 +/- 30 fmol/ml in Père David's hinds within 5 min of treatment.
    1 context sentence
    Summary · context
    systemic administration of a luteolytic dose of the prostaglandin F2 alpha analogue, cloprostenol, caused the concentration of oxytocin in the peripheral circulation to rise

    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 mid-luteal Père David's deer hinds, cloprostenol raised the body's own circulating oxytocin within 5 min of treatment.

    In plain wordsIn Père David's deer, a prostaglandin drug raised the body's own oxytocin levels in blood within minutes.

    Peptide
    Oxytocin
    Outcome
    IncreasePlasma oxytocin after cloprostenol in Père David's deer
    Study

    Père David's deern: not reported in source

    Outcome group
    Sex hormones and fertility · Reproductive and sexual health

    Measurements

    Plasma oxytocin before
    6.2 fmol/ml
    Père David's deer
    Plasma oxytocin after
    153 fmol/ml
    Père David's deer

    Source sentences

    Summary
    Mean (+/- SEM) concentrations increased from 8.1 +/- 0.7 to 97 +/- 8 fmol/ml in red and from 6.2 +/- 0.7 to 153 +/- 30 fmol/ml in Père David's hinds within 5 min of treatment.
    1 context sentence
    Summary · context
    systemic administration of a luteolytic dose of the prostaglandin F2 alpha analogue, cloprostenol, caused the concentration of oxytocin in the peripheral circulation to rise

    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 red and Père David's deer, the oxytocin response to cloprostenol during seasonal anoestrus was less than 10% of that during the breeding season.

    In plain wordsIn both deer species, the body's own oxytocin response to a prostaglandin drug was much smaller outside the breeding season.

    Peptide
    Oxytocin
    Outcome
    DecreaseOxytocin response to cloprostenol in seasonal anoestrus
    Study

    red deer and Père David's deern: not reported in source

    Comparator
    Breeding season
    Outcome group
    Sex hormones and fertility · Reproductive and sexual health

    Measurements

    Oxytocin response relative to breeding season
    < 10%
    seasonal anoestrus

    Source sentences

    Summary
    During seasonal anoestrus oxytocin secretion in response to cloprostenol was reduced to less than 10% of that during the breeding season, in both species.

    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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