Runx3 regulates folliculogenesis and steroidogenesis in granulosa cells of immature mice

Fumiya Ojima, Yuka Saito, Yukiko Tsuchiya, Maho Ogoshi, Hiroshi Fukamachi, Kenichi Inagaki, Fumio Otsuka, Sakae Takeuchi, Sumio Takahashi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We previously demonstrated that female Runx3 knockout (Runx3−/−) mice were anovulatory and their uteri were atrophic and that Runx3 mRNA was expressed in granulosa cells. To clarify how Runx3 regulates folliculogenesis and ovulation, we examine the effects of Runx3 knockout on the gene expression of growth factors associated with folliculogenesis and enzymes associated with steroidogenesis. In Runx3−/− mouse ovaries, the numbers of primary and antral follicles were lower than those in wild-type (wt) mice at 3 weeks of age, indicating that the loss of Runx3 affects folliculogenesis. The expression of genes encoding activin and inhibin subunits (Inha, Inhba and Inhbb) was also decreased in ovaries from the Runx3−/− mice compared with that in wt mice. Moreover, the expression of the genes Cyp11a1 and Cyp19a1 encoding steroidogenic enzymes was also decreased. In cultured granulosa cells from 3-week-old mouse ovaries, Cyp19a1 mRNA levels were lower in Runx3−/− mice than those in wt mice. Follicle-stimulating hormone (FSH) treatment increased Cyp19a1 mRNA levels in both wt and Runx3−/− granulosa cells in culture but the mRNA level in Runx3−/− granulosa cells was lower than that in wt ones, indicating that granulosa cells could not fully function in the absence of Runx3. At 3 weeks of age, gonadotropin α subunit, FSHβ subunit and luteinizing hormone (LH) β subunit mRNA levels were decreased in Runx3−/− mice. These findings suggest that Runx3 plays a key role in female reproduction by regulating folliculogenesis and steroidogenesis in granulosa cells.

Original languageEnglish
JournalCell and Tissue Research
DOIs
Publication statusAccepted/In press - Jan 1 2018

Fingerprint

Granulosa Cells
Knockout Mice
Messenger RNA
Ovary
Follicle Stimulating Hormone
Gene Expression
Activins
Inhibins
Enzymes
Luteinizing Hormone
Ovulation
Gonadotropins
Uterus
Reproduction
Cultured Cells
Intercellular Signaling Peptides and Proteins
Cell Culture Techniques

Keywords

  • Estrogen
  • Follicle
  • Mouse
  • Ovary
  • Runx3

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology
  • Cell Biology

Cite this

Runx3 regulates folliculogenesis and steroidogenesis in granulosa cells of immature mice. / Ojima, Fumiya; Saito, Yuka; Tsuchiya, Yukiko; Ogoshi, Maho; Fukamachi, Hiroshi; Inagaki, Kenichi; Otsuka, Fumio; Takeuchi, Sakae; Takahashi, Sumio.

In: Cell and Tissue Research, 01.01.2018.

Research output: Contribution to journalArticle

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abstract = "We previously demonstrated that female Runx3 knockout (Runx3−/−) mice were anovulatory and their uteri were atrophic and that Runx3 mRNA was expressed in granulosa cells. To clarify how Runx3 regulates folliculogenesis and ovulation, we examine the effects of Runx3 knockout on the gene expression of growth factors associated with folliculogenesis and enzymes associated with steroidogenesis. In Runx3−/− mouse ovaries, the numbers of primary and antral follicles were lower than those in wild-type (wt) mice at 3 weeks of age, indicating that the loss of Runx3 affects folliculogenesis. The expression of genes encoding activin and inhibin subunits (Inha, Inhba and Inhbb) was also decreased in ovaries from the Runx3−/− mice compared with that in wt mice. Moreover, the expression of the genes Cyp11a1 and Cyp19a1 encoding steroidogenic enzymes was also decreased. In cultured granulosa cells from 3-week-old mouse ovaries, Cyp19a1 mRNA levels were lower in Runx3−/− mice than those in wt mice. Follicle-stimulating hormone (FSH) treatment increased Cyp19a1 mRNA levels in both wt and Runx3−/− granulosa cells in culture but the mRNA level in Runx3−/− granulosa cells was lower than that in wt ones, indicating that granulosa cells could not fully function in the absence of Runx3. At 3 weeks of age, gonadotropin α subunit, FSHβ subunit and luteinizing hormone (LH) β subunit mRNA levels were decreased in Runx3−/− mice. These findings suggest that Runx3 plays a key role in female reproduction by regulating folliculogenesis and steroidogenesis in granulosa cells.",
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AU - Fukamachi, Hiroshi

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AU - Takeuchi, Sakae

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