Development of the human bladder and ureterovesical junction.
Aron Liaw1, Gerald R Cunha1, Joel Shen1
1Department of Urology, University of California, San Francisco, San Francisco, CA Division of Pediatric Urology, University of California San Francisco Benioff Children's Hospital, San Francisco, CA 94143, United States.
Differentiation; Research in Biological Diversity
|September 22, 2018
Summary
Human bladder and ureterovesical junction development involves mesenchymal-epithelial interactions and key signaling factors. Understanding these processes is crucial for preventing congenital urinary tract malformations.
Area of Science:
- Developmental biology
- Urology
- Cellular signaling
Background:
- The urinary bladder stores urine, with the trigone and ureterovesical junctions ensuring unidirectional flow.
- Embryological development of these structures is critical for normal urinary tract function.
Purpose of the Study:
- To review existing literature on human bladder and ureterovesical junction development.
- To focus on cellular signaling pathways involved in this process.
Main Methods:
- Literature review of human bladder and ureterovesical junction embryology.
- Analysis of key signaling factors and cellular interactions.
Main Results:
- Bladder and ureterovesical junction formation occurs between weeks 4-8 of gestation from the urogenital sinus.
- Mesenchymal-epithelial interactions, involving signaling factors like shh, TGF-β, Bmp4, and Fgfr2, are crucial.
- The ureteric bud integrates into the bladder, with trigonal musculature originating from bladder mesenchyme.
Conclusions:
- Normal bladder and ureterovesical junction development relies on precise cellular signaling and mesenchymal-epithelial interactions.
- Disruptions in these developmental pathways can lead to congenital anomalies like ureteric duplication and bladder exstrophy.
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