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Related Experiment Videos

Urocortin in pregnancy

B P Glynn1, A Wolton, B Rodríguez-Liñares

  • 1Nuffield Department of Obstetrics and Gynaecology, University of Oxford, Women's Centre, John Radcliffe Hospital, United Kingdom.

American Journal of Obstetrics and Gynecology
|September 10, 1998
PubMed
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Urocortin is not found in maternal circulation or pregnancy tissues, suggesting it does not displace corticotropin-releasing hormone. Further research is needed for other potential ligands.

Area of Science:

  • Reproductive endocrinology
  • Maternal-fetal medicine

Background:

  • Corticotropin-releasing hormone (CRH) levels rise in maternal circulation during pregnancy.
  • The source and function of elevated CRH in pregnancy are not fully understood.
  • Urocortin is a related peptide with potential roles in stress and reproduction.

Purpose of the Study:

  • To investigate if urocortin displaces corticotropin-releasing hormone (CRH) from its binding protein in maternal circulation.
  • To determine if urocortin is synthesized in placental tissues during pregnancy.

Main Methods:

  • Developed a specific radioimmunoassay for urocortin.
  • Measured urocortin and CRH in placental tissues and fetal membranes from normal and preeclamptic pregnancies.
  • Assayed urocortin and CRH in maternal plasma throughout gestation.

Related Experiment Videos

Main Results:

  • CRH was detected in placentas and fetal membranes, with higher levels in preeclamptic placentas.
  • Urocortin was not detected in any pregnancy tissues or maternal plasma samples.
  • No pregnancy-related pattern was observed for urocortin in maternal plasma.

Conclusions:

  • Urocortin is not significantly translated in pregnancy tissues or detectable in maternal circulation.
  • Urocortin is unlikely to be responsible for elevated free CRH in late pregnancy.
  • The possibility of an uncharacterized CRH-like peptide remains.