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Somatic sex reprogramming of adult ovaries to testes by FOXL2 ablation.

In mammals, the transcription factor SRY, encoded by the Y chromosome, is normally responsible for triggering the indifferent gonads to develop as testes rather than ovaries. However, testis differentiation can occur in its absence. Here we demonstrate in the mouse that a single factor, the forkhead transcriptional regulator FOXL2, is required to prevent transdifferentiation of an adult ovary to a testis. Inducible deletion of Foxl2 in adult ovarian follicles leads to immediate upregulation of testis-specific genes including the critical SRY target gene Sox9. Concordantly, reprogramming of granulosa and theca cell lineages into Sertoli-like and Leydig-like cell lineages occurs with testosterone levels comparable to those of normal XY male littermates. Our results show that maintenance of the ovarian phenotype is an active process throughout life. They might also have important medical implications for the understanding and treatment of some disorders of sexual development in children and premature menopause in women.

Pubmed ID: 20005806


  • Uhlenhaut NH
  • Jakob S
  • Anlag K
  • Eisenberger T
  • Sekido R
  • Kress J
  • Treier AC
  • Klugmann C
  • Klasen C
  • Holter NI
  • Riethmacher D
  • Schütz G
  • Cooney AJ
  • Lovell-Badge R
  • Treier M



Publication Data

December 11, 2009

Associated Grants

  • Agency: Medical Research Council, Id: MC_U117562207
  • Agency: Medical Research Council, Id: U117512772

Mesh Terms

  • Animals
  • Cell Transdifferentiation
  • Female
  • Forkhead Transcription Factors
  • Gene Deletion
  • Granulosa Cells
  • Male
  • Mice
  • Oocytes
  • Ovary
  • Sertoli Cells
  • Testis