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Fibroblast growth factor in chick osteogenesis.
S R Frenkel1, D A Grande, M Collins
1Hospital for Joint Diseases Orthopaedic Institute, New York, NY.
Biomaterials
|July 1, 1990
Summary
Fibroblast Growth Factor (FGF) stimulates osteogenic cell proliferation in chick embryos but inhibits bone matrix collagen production. This suggests FGF
Area of Science:
- Developmental biology
- Skeletal biology
- Cell biology
Background:
- Osteogenesis is a complex process involving bone formation.
- Fibroblast Growth Factors (FGFs) are signaling molecules implicated in various developmental processes.
- The specific role of FGF in embryonic osteogenesis requires further in vivo investigation.
Purpose of the Study:
- To investigate the in vivo effects of FGF on osteogenesis in the developing chick embryo.
- To determine FGF's impact on osteogenic cell proliferation and bone matrix formation.
Main Methods:
- Day-11 chick embryos were utilized for the study.
- Fibroblast Growth Factor (FGF) was administered via injection.
- Radiotracers, specifically 3H-thymidine and 3H-proline, were used to label cellular proliferation and matrix production, respectively.
Main Results:
- A significant increase in 3H-thymidine labeling of osteogenic cells was observed after FGF administration, indicating stimulated proliferation.
- Conversely, 3H-proline labeling over the bone matrix was higher in control groups, suggesting inhibited collagen production by FGF.
- Cartilage cells and matrix showed sparse labeling, indicative of low metabolic activity.
Conclusions:
- These findings provide the first in vivo evidence that FGF promotes osteogenic cell proliferation.
- FGF appears to inhibit the production of bone matrix collagen during embryonic development.
- A potential role for FGF in embryonic osteogenesis and fracture repair is proposed.