PUBLICATION

Retinoic acid and Cyp26b1 are critical regulators of osteogenesis in the axial skeleton

Authors
Spoorendonk, K.M., Peterson-Maduro, J., Renn, J., Trowe, T., Kranenbarg, S., Winkler, C., and Schulte-Merker, S.
ID
ZDB-PUB-081022-34
Date
2008
Source
Development (Cambridge, England)   135(22): 3765-3774 (Journal)
Registered Authors
Peterson-Maduroe, Josi, Renn, Joerg, Schulte-Merker, Stefan, Spoorendonk, Kirsten, Trowe, Torsten, Winkler, Christoph
Keywords
Cyp26b1, Osteoblast, Osteogenesis, Retinoic acid, Zebrafish
MeSH Terms
  • Animals
  • Animals, Genetically Modified
  • Cytochrome P-450 Enzyme System/metabolism*
  • Embryo, Nonmammalian/cytology
  • Embryo, Nonmammalian/embryology
  • Embryo, Nonmammalian/metabolism
  • Gene Expression Regulation, Developmental
  • Gene Expression Regulation, Enzymologic
  • Mice
  • Mutation/genetics
  • Oryzias
  • Osteoblasts/cytology
  • Osteoblasts/drug effects
  • Osteoblasts/enzymology
  • Osteogenesis*/drug effects
  • Phenotype
  • Transcription Factors/genetics
  • Transcription Factors/metabolism
  • Tretinoin/pharmacology*
  • Zebrafish/embryology
  • Zebrafish/metabolism
PubMed
18927155 Full text @ Development
Abstract
Retinoic acid (RA) plays important roles in diverse biological processes ranging from germ cell specification to limb patterning. RA ultimately exerts its effect in the nucleus, but how RA levels are being generated and maintained locally is less clear. Here, we have analyzed the zebrafish stocksteif mutant, which exhibits severe over-ossification of the entire vertebral column. stocksteif encodes cyp26b1, a cytochrome P450 member that metabolizes RA. The mutant is completely phenocopied by treating 4 dpf wild-type embryos with either RA or the pharmacological Cyp26 blocker R115866, thus identifying a previously unappreciated role for RA and cyp26b1 in osteogenesis of the vertebral column. Cyp26b1 is expressed within osteoblast cells, demonstrating that RA levels within these cells need to be tightly controlled. Furthermore, we have examined the effect of RA on osteoblasts in vivo. As numbers of osteoblasts do not change upon RA treatment, we suggest that RA causes increased activity of axial osteoblasts, ultimately resulting in defective skeletogenesis.
Genes / Markers
Figures
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Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Antibodies
Orthology
Engineered Foreign Genes
Mapping