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Using Ex Vivo Upright Droplet Cultures of Whole Fetal Organs to Study Developmental Processes during Mouse Organogenesis
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Sox9 is required for prostate development.

Martin K Thomsen1, Christopher M Butler, Michael M Shen

  • 1Section of Gene Function and Regulation, Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, UK.

Developmental Biology
|March 8, 2008
PubMed
Summary
This summary is machine-generated.

The transcription factor Sox9 is crucial for early mammalian prostate development. Deleting Sox9 specifically in the prostate disrupts ventral lobe formation and differentiation, impacting key developmental genes and signaling pathways.

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Area of Science:

  • Developmental Biology
  • Genetics
  • Urology

Background:

  • Mammalian prostate development is complex, originating from the urogenital sinus.
  • Key factors influencing early prostate development remain incompletely understood.
  • Sox9 is a transcription factor with known roles in organogenesis.

Purpose of the Study:

  • To investigate the role of the transcription factor Sox9 in mammalian prostate development.
  • To determine the specific prostatic lobes and differentiation processes affected by Sox9.
  • To elucidate the molecular mechanisms by which Sox9 influences prostate development.

Main Methods:

  • Conditional knockout mice utilizing Cre-lox technology (Nkx3.1-Cre) to delete Sox9 specifically in the developing prostate.
  • Analysis of prostatic morphology, gene expression (Nkx3.1, Shh, Fgfr2, Sprouty2), and cell proliferation in mutant and wild-type littermates.
  • Prostate organ culture experiments using Mek inhibitor (U0126) and Fgf receptor inhibitor (SU5402).

Main Results:

  • Prostate-specific deletion of Sox9 resulted in absent ventral prostate development and abnormal anterior prostate differentiation.
  • Mutant prostates showed early loss of prostate epithelial marker genes (Nkx3.1, Shh) and reduced proliferation in the ventral lobe.
  • Sox9 deficiency led to severely reduced levels of Fgfr2 and Sprouty2, indicating impaired Fgf signaling in the ventral prostate.
  • Organ culture experiments suggested that the timing of gene deletion influences lobe-specific phenotypes.

Conclusions:

  • Sox9 is essential for the initial differentiation of prostate bud epithelia.
  • Sox9 regulates the expression of key genes and signaling pathways, including Fgf signaling, critical for prostate lobe development.
  • The findings highlight Sox9 as a critical regulator of prostate morphogenesis and differentiation.