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[Endothelin B receptor system and Hirschsprung disease]
1Department of Pediatric Surgery, Osaka University Medical School.
Nihon Rinsho. Japanese Journal of Clinical Medicine
|August 14, 1998
Summary
Hirschsprung disease, a congenital gut malformation, arises from absent ganglion cells. Genetic mutations affecting neural crest development, particularly involving endothelin signaling, are key causes.
Area of Science:
- Developmental biology
- Genetics
- Gastroenterology
Context:
- Hirschsprung disease (HSCR) is a congenital disorder characterized by aganglionic segments of the colon.
- It results from the failure of neural crest cell (NCC) colonization of the distal gut.
- Genetic factors, including mutations in EDNRB, EDN3, RET, GDNF, and SOX10, are implicated in HSCR pathogenesis.
Purpose:
- To elucidate the molecular mechanisms underlying Hirschsprung disease.
- To investigate the roles of endothelin-3 (EDN3) and endothelin-B receptor (EDNRB) in enteric nervous system development.
- To understand the interaction between EDN3 and EDNRB in regulating neural crest cell migration and differentiation.
Summary:
- Hirschsprung disease is linked to mutations in genes crucial for enteric nervous system development, including EDNRB and EDN3.
- EDNRB is expressed on migrating neural crest cells, while EDN3 is expressed in surrounding mesenchymal cells.
- EDN3 acts as a signaling molecule, influencing NCC proliferation and differentiation, supporting its role as an environmental factor interacting with EDNRB-expressing cells.
Impact:
- This research deepens our understanding of the genetic and molecular basis of Hirschsprung disease.
- Identifies critical signaling pathways involved in enteric nervous system formation.
- Provides a foundation for potential therapeutic strategies targeting EDN3-EDNRB interactions for HSCR treatment.