RRC ID 30617
Author Iida Y, Hibiya K, Inohaya K, Kudo A.
Title Eda/Edar signaling guides fin ray formation with preceding osteoblast differentiation, as revealed by analyses of the medaka all-fin less mutant afl.
Journal Dev Dyn
Abstract BACKGROUND:Ectodysplasin (Eda) signaling is essential for the morphogenesis of several ectodermal appendages.
RESULTS:Here, we report a medaka mutant, all-fin less (afl), which has a nonsense mutation in its eda gene. The adult afl fish displayed various abnormalities of its dermal skeleton, such as short and twisted fin rays, missing and abnormally shaped scales and teeth, and skull deformation. Focusing on the developing fin rays in the caudal region of afl larvae, we found that the fin rays did not elongate; although the initial formation of fin rays proceeded normally. Additionally, eda expression was lost, and the expression pattern of edar, the gene for the receptor of Eda, was different from wild-type one. In vivo imaging of the double-transgenic medaka expressing enhanced green fluorescent protein under control of the edar promoter and DsRed under control of the osterix promoter revealed that edar expression preceded that of osterix and that the edar-expressing cells migrated in the direction of fin ray elongation, indicating that the Eda/Edar signaling event precedes osteoblast differentiation.
CONCLUSIONS:Our findings provide evidence that Eda signaling accompanied with the binding of Eda to Edar are essential for fin ray formation guided by cell migration.
Volume 243(6)
Pages 765-77
Published 2014-6-1
DOI 10.1002/dvdy.24120
PMID 24585696
MeSH Animal Fins / cytology Animal Fins / embryology* Animals Cell Differentiation / physiology* Ectodysplasins / genetics Ectodysplasins / metabolism* Edar Receptor / genetics Edar Receptor / metabolism* Fish Proteins / genetics Fish Proteins / metabolism* Oryzias / embryology* Oryzias / genetics Osteoblasts / cytology Osteoblasts / metabolism* Signal Transduction / physiology*
IF 3.275
Times Cited 7
Medaka BAC Cab MT296