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Core binding factor beta (CBFβ) is crucial for ovarian function, impacting fertility and ovulation. Knockdown mice showed reduced fertility, altered gene expression, and impaired luteal development, highlighting CBFβ

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Area of Science:

  • Reproductive biology and endocrinology
  • Molecular genetics and epigenetics
  • Cellular and developmental biology

Background:

  • Core binding factor (CBF) is a transcription factor complex essential for gene regulation.
  • CBFβ subunit is critical for the DNA binding and stability of the CBF complex.
  • CBF expression in the ovary suggests a role in ovulation.

Purpose of the Study:

  • To investigate the functional role of CBF complexes (RUNX1/CBFβ and RUNX2/CBFβ) in ovarian function.
  • To examine the ovarian phenotype of granulosa cell-specific CBFβ knockdown mice.
  • To identify genes regulated by CBFβ in the ovary.

Main Methods:

  • Generated granulosa cell-specific CBFβ knockdown mice (Cbfb f/f * Cyp19 cre).
  • Assessed fertility parameters, including litter size and progesterone levels.
  • Utilized RNA sequencing to analyze gene expression changes in granulosa cells post-hCG stimulation.
  • Examined ovarian morphology and corpora lutea gene expression.

Main Results:

  • CBFβ knockdown mice exhibited significantly reduced fertility, smaller litter sizes, and decreased gestational progesterone.
  • Superovulation yielded fewer cumulus oocyte complexes in mutant mice.
  • RNA sequencing revealed altered expression of over 200 mRNA transcripts, including key ovulation regulators.
  • Morphological changes and decreased luteal gene expression were observed in knockdown ovaries.

Conclusions:

  • CBFβ plays a critical role in regulating gene expression, ovulatory processes, and luteal development in the ovary.
  • Disruption of CBFβ impacts female fertility and ovarian structure.
  • CBF complexes are significant regulators of ovarian function and require further investigation.