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Multiple roles for FGF-3 during cranial neural development in the chicken
Development (Cambridge, England)
|May 1, 1995
Summary
Fibroblast growth factor 3 (FGF-3) plays a key role in chick embryo development, particularly in hindbrain and pharyngeal arch formation. Its expression patterns reveal functions in neural tube patterning and boundary formation.
Area of Science:
- Developmental Biology
- Molecular Biology
- Embryology
Background:
- Fibroblast growth factor 3 (FGF-3) is crucial for vertebrate embryonic development, especially hindbrain and otocyst formation.
- The chicken embryo provides a suitable model for studying these developmental processes.
Purpose of the Study:
- To isolate and characterize chicken Fgf-3 cDNAs.
- To determine the spatiotemporal expression pattern of Fgf-3 in chick embryos from early development to organogenesis.
Main Methods:
- cDNA isolation and characterization.
- RNA expression analysis in chick embryos at various developmental stages (Stage 3 to Stage 25).
- Analysis of Fgf-3 expression in regenerating rhombomere boundaries via tissue grafting.
Main Results:
- Fgf-3 exhibits dynamic expression in the cranial neural tube, including the primitive streak, Hensen's node, and developing hindbrain (rhombomeres 4, 5, and 6).
- Expression becomes restricted to rhombomere boundaries, potentially marking specific cell populations and indicating a role in boundary formation and maintenance.
- Fgf-3 is also expressed in pharyngeal endoderm, pharyngeal arch ectoderm, stomodeum, segmental plate, and somites.
Conclusions:
- FGF-3 is dynamically expressed throughout chick embryogenesis, highlighting its multifaceted roles.
- Its expression pattern suggests significant involvement in neural tube patterning, rhombomere boundary formation, and the development of pharyngeal structures.