Dawood MY, Khan-Dawood FS. Effect of the oxytocin antagonist antocin and agonist decomoton on baboon luteal cell production and release of progesterone.
Fertil Steril 2007;
90:1366-71. [PMID:
18054931 DOI:
10.1016/j.fertnstert.2007.08.045]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2007] [Revised: 08/20/2007] [Accepted: 08/20/2007] [Indexed: 11/18/2022]
Abstract
OBJECTIVE
To evaluate the effect of oxytocin, its antagonist antocin, and agonist decomoton on baboon luteal cell P secretion.
DESIGN
Prospective study.
SETTING
Academic department of obstetrics and gynecology in a US medical school.
ANIMAL(S)
Luteal-phased timed corpora lutea (CL) from a cohort of adult cycling baboons (Papio anubis).
INTERVENTION(S)
Dispersed luteal cells from luteal phase baboon CL were cultured and treated with nothing (control), oxytocin (4-400 mU), antocin (4-400 microg), oxytocin with antocin, decomoton (4-400 microg), or oxytocin with decomoton.
MAIN OUTCOME MEASURE(S)
Basal and hCG (10 U)-stimulated P were measured in the incubate.
RESULT(S)
Basal P secretion did not change significantly with all peptides studied. The hCG-stimulated P secretion was significantly inhibited by oxytocin (4-400 mU), antocin (4-400 microg), and antocin combined with oxytocin, and with oxytocin, decomoton, and decomoton combined with oxytocin. Antocin (-12%) was less inhibitory than oxytocin (-25% to -22%). Antocin combined with oxytocin enhanced the inhibition to -35% to -39%. Decomoton had stronger (not significant) inhibition than oxytocin. Mean inhibition was 28%-35% with all doses of oxytocin, decomoton, or combined together.
CONCLUSION(S)
Although decomoton, an oxytocin agonist inhibited hCG-stimulated luteal cell P secretion in vitro, antocin also acted like an agonist, rather than an antagonist, in inhibiting P secretion.
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