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Updated: Jul 6, 2025

Expression of Transgenes in Native Bladder Urothelium Using Adenovirus-Mediated Transduction
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Transcription factor Tcf21 modulates urinary bladder size and differentiation.

Elizabeth A Mann1, Melissa S Mogle1, Joo-Seop Park2,3

  • 1Division of Pediatric Urology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.

Development, Growth & Differentiation
|January 10, 2024
PubMed
Summary

The transcription factor Tcf21 is crucial for bladder development. Its absence leads to smaller bladders, increased cell death in mesenchyme, and delayed smooth muscle and urothelial maturation.

Keywords:
bladderdevelopmentsmooth muscletranscription factor Tcf21urothelium

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Area of Science:

  • Developmental Biology
  • Genetics
  • Urology

Background:

  • Urinary bladder organogenesis involves complex, coordinated cellular processes.
  • Tcf21, a transcription factor, is specifically expressed in developing bladder mesenchyme.

Purpose of the Study:

  • To investigate the role of Tcf21 in mammalian bladder development.
  • To elucidate the cellular and molecular mechanisms underlying Tcf21's function.

Main Methods:

  • Analysis of Tcf21-deficient mouse models.
  • Assessment of bladder morphology and cellular apoptosis.
  • Evaluation of gene expression related to smooth muscle and urothelial differentiation.

Main Results:

  • Tcf21-deficient mice exhibited hypoplastic bladders.
  • Increased apoptosis was observed in the mesenchyme of Tcf21 mutant bladders.
  • Delayed visceral smooth muscle formation (Myocd defect) and urothelial basal cell layer maturation (Krt5, Krt14 defect) were noted.

Conclusions:

  • Tcf21 is essential for bladder development, regulating mesenchyme survival and differentiation autonomously.
  • Tcf21 also influences urothelial maturation non-cell-autonomously.
  • These findings highlight Tcf21's critical role in coordinating bladder organogenesis.