|ZFIN ID: ZDB-PUB-091023-63|
Osteoblast maturation occurs in overlapping proximal-distal compartments during fin regeneration in zebrafish
Brown, A.M., Fisher, S., and Iovine, M.K.
|Source:||Developmental dynamics : an official publication of the American Association of Anatomists 238(11): 2922-2928 (Journal)|
|Registered Authors:||Fisher, Shannon, Iovine, M. Kathryn|
|Keywords:||bone growth, osteoblast maturation, fin regeneration, zebrafish, cx43|
|PubMed:||19842180 Full text @ Dev. Dyn.|
Brown, A.M., Fisher, S., and Iovine, M.K. (2009) Osteoblast maturation occurs in overlapping proximal-distal compartments during fin regeneration in zebrafish. Developmental dynamics : an official publication of the American Association of Anatomists. 238(11):2922-2928.
ABSTRACTDuring fin regeneration, osteoblasts must continually differentiate for outgrowth of the bony fin rays. Bone maturity increases in a distal-proximal manner, and osteoblast maturation can be detected similarly when following gene expression. We find that early markers for osteoblast differentiation are expressed in a discrete domain at the distal end of the fin, just proximal to the adjacent germinal compartment of dividing cells. Matrix genes, required at later stages developmentally, are expressed in a population of cells proximally to the early genes. A marker for mature osteoblasts is expressed in cells further proximal. These domains of gene expression are partially overlapping, perhaps revealing additional levels of osteoblast maturity. We suggest a model for growth where new cells are continually added to the distal-most osteoblast compartment, while osteoblasts in more proximal locations differentiate, thus translating developmental time to location on the proximal-distal axis.