Human myometrial gene expression before and during parturition

Jon C. Havelock, Patrick Keller, Ndaya Muleba, Bobbie A. Mayhew, Brian M. Casey, William E. Rainey, R. Ann Word

Research output: Contribution to journalArticle

108 Scopus citations

Abstract

Identification of temporal and spatial changes in myometrial gene expression during parturition may further the understanding of the coordinated regulation of myometrial contractions during parturition. The objective of this study was to compare the gene expression profiles of human fundal myometrium from pregnant women before and after the onset of labor using a functional genomics approach, and to further characterize the spatial and temporal expression patterns of three genes believed to be important in parturition. Fundal myometrial mRNA was isolated from five women in labor and five women not in labor, and analyzed using human UniGEM-V microarrays with 9182 cDNA elements. Real-time polymerase chain reaction using myometrial RNA from pregnant women in labor or not in labor was used to examine mRNA levels for three of the genes; namely, prostaglandin-endoperoxide synthase 2 (PTGS2), calgranulin B (S100A9), and oxytocin receptor (OXTR). The spatial expression pattern of these genes throughout the pregnant uterus before and after labor was also determined. Immunolocalization of cyclooxygenase-2 (also known as PTGS2) and S100A9 within the uterine cervix and myometrium were analyzed by immunohistochemistry. Few genes were differentially expressed in fundal myometrial tissues at term with the onset of labor. However, there appears to be a subset of genes important in the parturition cascade. The cellular properties of S100A9, its spatial localization, and dramatic increase in cervix and myometrium of women in labor suggest that this protein may be very important in the initiation or propagation of human labor.

Original languageEnglish (US)
Pages (from-to)707-719
Number of pages13
JournalBiology of Reproduction
Volume72
Issue number3
DOIs
Publication statusPublished - Mar 2005

    Fingerprint

Keywords

  • Cervix
  • Gene regulation
  • Parturition
  • Pregnancy
  • Uterus

ASJC Scopus subject areas

  • Cell Biology
  • Developmental Biology
  • Embryology

Cite this

Havelock, J. C., Keller, P., Muleba, N., Mayhew, B. A., Casey, B. M., Rainey, W. E., & Word, R. A. (2005). Human myometrial gene expression before and during parturition. Biology of Reproduction, 72(3), 707-719. https://doi.org/10.1095/biolreprod.104.032979