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fgf20 Is Essential for Initiating Zebrafish Fin Regeneration
Geoffrey G. Whitehead,
Shinji Makino,
Ching-Ling Lien,
Mark T. Keating*
Abstract:
Epimorphic regeneration requires the presence or creation ofpluripotent cells capable of reproducing lost organs. Zebrafishfin regeneration is mediated by the creation of blastema cells.Here, we characterize the devoid of blastema (dob) mutant thatfails fin regeneration during initial steps, forms abnormalregeneration epithelium, and does not form blastema. This mutationhas no impact on embryonic survival. Dob results from an fgf20anull mutation, Y148S. Fgf20a is expressed during initiationof fin regeneration at the epithelial-mesenchymal boundary andlater overlaps with the blastema marker msxb. Thus, fgf20a hasa regeneration-specific requirement, initiating fin regeneration,and controlling blastema formation.
Howard Hughes Medical Institute, Department of Cell Biology, Harvard Medical School, Department of Cardiology, Children's Hospital, Boston, MA 02115, USA.
* To whom correspondence should be addressed. E-mail: mark.keating{at}novartis.com
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