Journal
CELL
Volume 104, Issue 6, Pages 875-889Publisher
CELL PRESS
DOI: 10.1016/S0092-8674(01)00284-7
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Funding
- NCI NIH HHS [CA60673] Funding Source: Medline
- NICHD NIH HHS [HD33688, HD35692] Funding Source: Medline
- NIGMS NIH HHS [5-T32-GM07200-25, GM56757] Funding Source: Medline
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Fgfs direct embryogenesis of several organs, including the lung, limb, and anterior pituitary. Here we report male-to-female sex reversal in mice lacking Fibroblast growth factor 9 (Fgf9), demonstrating a novel role for FGF signaling in testicular embryogenesis. Fgf9(/-) mice also exhibit lung hypoplasia and die at birth. Reproductive system phenotypes range from testicular hypoplasia to complete sex reversal, with most Fgf9(-/-) reproductive systems appearing grossly female at birth. Fgf9 appears to act downstream of Sly to stimulate mesenchymal proliferation, mesonephric cell migration, and Sertoli cell differentiation in the embryonic testis. While Sry is found only in some mammals, Fgfs are highly conserved. Thus, Fgfs may function in sex determination and reproductive system development in many species.
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