Interleukin-18 (IL-18) mRNA expression and localization of IL-18 mRNA-expressing cells in the mouse uterus

Kenji Kusumoto, Yousuke Murakami, Mariko Otsuki, Munetoshi Kanayama, Sakae Takeuchi, Sumio Takahashi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Interleukin-18 (IL-18) belongs to the interleukin-1 family and was identified as an interferon-γ inducing factor. We investigated IL-18 mRNA-expressing cells in the mouse uterus. By RNase protection assay, IL-18 mRNA and α subunit of IL-18 receptor mRNA were detected in the uterus. In the uterus, IL-18 mRNA levels increased during sexual maturation. In situ hybridization analysis demonstrated IL-18 mRNA-expressing cells in the mouse uterus of different ages. At 21 days of age, IL-18 mRNA-expressing cells were detected in the luminal epithelial cells and stromal cells although the IL-18 mRNA signal was weak. At 42 days of age, IL-18 mRNA signal was mainly detected in the stromal cells located near the myometrium, and in some of the luminal and glandular epithelial cells. In the uterus of 63-day-old adult mice, a strong hybridization signal for IL-18 mRNA was detected at estrus, but was weak at diestrus. IL-18 mRNA was mainly detected in the glandular epithelial cells and stromal cells. The effect of estradiol-17β (E2) on IL-18 mRNA-expressing cells in the uterus was examined in ovariectomized mice. In oil-treated mice IL-18 mRNA signal was localized in luminal epithelial cells and stromal cells, while in E2-treated mice IL-18 mRNA signal was localized in stromal cells alone. These results suggest that the mouse uterus has an IL-18 system, and IL-18 exerts a physiological role within the uterus in a paracrine manner, and that IL-18 gene expression is regulated by estrogen.

Original languageEnglish
Pages (from-to)1003-1010
Number of pages8
JournalZoological science
Volume22
Issue number9
DOIs
Publication statusPublished - Sep 1 2005

Keywords

  • Estrogen
  • Interleukin-18 (IL-18)
  • Mouse
  • Uterus

ASJC Scopus subject areas

  • Animal Science and Zoology

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