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Novel action of FOXL2 as mediator of Col1a2 gene autoregulation

Mara Marongiu1, Manila Deiana1, Loredana Marcia2

  • 1Istituto di Ricerca Genetica e Biomedica, Consiglio Nazionale delle Ricerche, Monserrato 09042, Italy.

Developmental Biology
|May 24, 2016
PubMed

Insights

FOXL2, a key transcription factor, regulates ovarian extracellular matrix by interacting with collagen. Its absence leads to elevated collagen levels, impacting ovarian development and aging.

Area of Science:

  • Developmental Biology
  • Molecular Endocrinology
  • Extracellular Matrix Biology

Background:

  • FOXL2 is a crucial transcription factor involved in ovarian development and function.
  • The extracellular matrix (ECM) plays a vital role in ovarian structure and reproductive lifespan.
  • Dysregulation of ECM components is associated with ovarian aging and fibrosis.

Purpose of the Study:

  • To investigate the interaction partners of FOXL2.
  • To determine the effect of FOXL2 on collagen gene transcription and ECM composition in the ovary.
  • To elucidate the role of FOXL2 in ovarian histogenesis and age-related fibrosis.

Main Methods:

  • Protein-protein interaction assays to identify FOXL2 binding partners.
  • Analysis of collagen gene expression (e.g., COL1A2) in wild-type and Foxl2-deficient ovaries.
  • Quantitative assessment of ECM components (collagens, fibronectin, laminin) in ovarian tissue.

Main Results:

  • FOXL2 interacts with C-terminal propeptides of fibrillary collagens.
  • FOXL2 binds to a regulatory element upstream of the COL1A2 gene, affecting collagen synthesis.
  • Foxl2(-/-) mouse ovaries exhibit elevated Col1a2, Col3a1, Col4a1, and fibronectin, with reduced laminin expression.

Conclusions:

  • FOXL2 regulates ECM composition by modulating collagen gene expression.
  • FOXL2's regulation of ECM is critical for ovarian histogenesis.
  • FOXL2 deficiency contributes to ovarian fibrosis and may impact reproductive aging and menopause.
Keywords:
COL1A2ECMFOXL2OvaryTranscriptional regulation

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