Related Experiment Video
Updated: Jul 1, 2025
07:17
Generation of Chimeric Axolotls with Mutant Haploid Limbs Through Embryonic Grafting
Published on: January 29, 2020
7.2K
Fgf10 mutant newts regenerate normal hindlimbs despite severe developmental defects
Miyuki Suzuki1, Akinori Okumura2, Akane Chihara2
1Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125.
Summary
Fibroblast Growth Factor 10 (FGF10) is crucial for newt hindlimb development but not regeneration. FGF10 mutants showed normal forelimbs but failed hindlimb formation, yet regenerated normally, revealing distinct developmental and regenerative mechanisms.
Area of Science:
- Developmental Biology
- Regenerative Medicine
- Comparative Genomics
Background:
- Fibroblast Growth Factor 10 (FGF10) is vital for amniote limb development.
- Its role in tetrapod limb development and regeneration is largely unknown.
- The newt model offers a unique opportunity to study limb regeneration.
Purpose of the Study:
- Investigate the function of FGF10 in newt limb development.
- Determine the role of FGF10 in adult newt limb regeneration.
- Compare the mechanisms of limb development and regeneration.
Main Methods:
- Generated Fgf10 mutant newt lines (Pleurodeles waltl).
- Analyzed limb development in Fgf10 mutants.
- Assessed limb regeneration capacity in Fgf10 mutants.
Main Results:
- Fgf10 mutant forelimbs developed normally.
- Fgf10 mutant hindlimbs exhibited developmental defects and downregulated FGF target genes.
- Despite developmental defects, Fgf10 mutants regenerated normal hindlimbs.
Conclusions:
- FGF10 plays a critical role in hindlimb formation in newts.
- FGF10 has minimal to no function in adult newt limb regeneration.
- Limb development and regeneration involve distinct underlying mechanisms.
