Prostanoid receptors in human uterine myocytes: The effect of reproductive state and stretch

S. R. Sooranna, Peta Grigsby, Leslie Myatt, P. R. Bennett, Mark R. Johnson

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In the human, prostanoids are known to be important mediators of uterine relaxation and contraction during pregnancy and parturition. We have previously shown that stretch of uterine smooth muscle cells increased prostaglandin H synthase 2 (PGHS-2) mRNA expression, PGHS-2 peptide synthesis and activity, however, the net effect on uterine contractility of this increase in prostaglandin synthesis would be determined by the expression of the different prostanoid receptors. Therefore, the aims of this study were to establish the expression of prostanoid receptor mRNA in uterine myocytes obtained from women in different reproductive states and to test the hypothesis that stretch of uterine myocytes alters prostanoid receptor mRNA expression to promote uterine contractility. Myocytes were isolated from women undergoing hysterectomy (NP) and pregnant women undergoing LSCS either before (NL) or after the onset of labour (L) and were subjected to 11% stretch for 1 h (n = 6 in all cases). Copy numbers of the individual receptors varied widely with reproductive state but followed the pattern: FP > IP = DP = EP-4 > TP = EP-3 = EP-2 > EP-1. FP mRNA expression was significantly lower in the NL group compared to the NP group and EP-3, EP-4 and TP mRNA expression was significantly lower in both NL and L groups compared to NP group levels. The level of mRNA expression of EP-1, EP-2, DP and IP did not differ between NP, NL and L groups. Stretch of cells derived from the NP group resulted in a significant decrease in EP-4 mRNA expression alone and of the NL group a significant decrease in EP-2 mRNA expression alone. Stretch had no effect on cells derived from the L group. These data show that pregnancy is associated with a significant reduction in 3 of 4 pro-contraction associated prostanoid receptor mRNA expression and 1 of 4 pro-relaxant. Stretch elicited no consistent change in prostanoid receptor mRNA expression.

Original languageEnglish (US)
Pages (from-to)859-864
Number of pages6
JournalMolecular Human Reproduction
Volume11
Issue number12
DOIs
StatePublished - Dec 2006
Externally publishedYes

Fingerprint

Muscle Cells
Prostaglandins
Messenger RNA
splenotritin
Cyclooxygenase 2
Labor Onset
Uterine Contraction
Pregnancy
Myometrium
Hysterectomy
Smooth Muscle Myocytes
Pregnant Women
Parturition
Peptides

Keywords

  • Pregnancy
  • Prostanoid receptors
  • Stretch
  • Uterine smooth muscle cells

ASJC Scopus subject areas

  • Obstetrics and Gynecology
  • Genetics
  • Developmental Biology
  • Embryology
  • Cell Biology

Cite this

Prostanoid receptors in human uterine myocytes : The effect of reproductive state and stretch. / Sooranna, S. R.; Grigsby, Peta; Myatt, Leslie; Bennett, P. R.; Johnson, Mark R.

In: Molecular Human Reproduction, Vol. 11, No. 12, 12.2006, p. 859-864.

Research output: Contribution to journalArticle

Sooranna, S. R. ; Grigsby, Peta ; Myatt, Leslie ; Bennett, P. R. ; Johnson, Mark R. / Prostanoid receptors in human uterine myocytes : The effect of reproductive state and stretch. In: Molecular Human Reproduction. 2006 ; Vol. 11, No. 12. pp. 859-864.
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