PUBLICATION
Forkhead transcription factor foxe1 regulates chondrogenesis in zebrafish
- Authors
- Nakada, C., Iida, A., Tabata, Y., and Watanabe, S.
- ID
- ZDB-PUB-090616-16
- Date
- 2009
- Source
- Journal of experimental zoology. Part B, Molecular and developmental evolution 312(8): 827-840 (Journal)
- Registered Authors
- Watanabe, Sumiko
- Keywords
- none
- MeSH Terms
-
- Animals
- Base Sequence
- Cartilage/embryology*
- DNA Primers
- Gene Knockdown Techniques
- In Situ Hybridization
- Receptor, Fibroblast Growth Factor, Type 2/genetics
- Reverse Transcriptase Polymerase Chain Reaction
- Thyroid Gland/metabolism
- Transcription Factors/genetics
- Transcription Factors/physiology*
- Zebrafish/embryology*
- Zebrafish Proteins/genetics
- PubMed
- 19488987 Full text @ J. Exp. Zool. B Mol. Dev. Evol.
Citation
Nakada, C., Iida, A., Tabata, Y., and Watanabe, S. (2009) Forkhead transcription factor foxe1 regulates chondrogenesis in zebrafish. Journal of experimental zoology. Part B, Molecular and developmental evolution. 312(8):827-840.
Abstract
Forkhead transcription factor (Fox) e1 is a causative gene for Bamforth-Lazarus syndrome, which is characterized by hypothyroidism and cleft palate. Applying degenerate polymerase chain reaction using primers specific for the conserved forkhead domain, we identified zebrafish foxe1 (foxe1). Foxe1 is expressed in the thyroid, pharynx, and pharyngeal skeleton during development; strongly expressed in the gill and weakly expressed in the brain, eye, and heart in adult zebrafish. A loss of function of foxe1 by morpholino antisense oligo (MO) exhibited abnormal craniofacial development, shortening of Meckel's cartilage and the ceratohyals, and suppressed chondrycytic proliferation. However, at 27 hr post fertilization, the foxe1 MO-injected embryos showed normal dlx2, hoxa2, and hoxb2 expression, suggesting that the initial steps of pharyngeal skeletal development, including neural crest migration and specification of the pharyngeal arch occurred normally. In contrast, at 2 dpf, a severe reduction in the expression of sox9a, colIIaI, and runx2b, which play roles in chondrocytic proliferation and differentiation, was observed. Interestingly, fgfr2 was strongly upregulated in the branchial arches of the foxe1 MO-injected embryos. Unlike Foxe1-null mice, normal thyroid development in terms of morphology and thyroid-specific marker expression was observed in foxe1 MO-injected zebrafish embryos. Taken together, our results indicate that Foxe1 plays an important role in chondrogenesis during development of the pharyngeal skeleton in zebrafish, probably through regulation of fgfr2 expression. Furthermore, the roles reported for FOXE1 in mammalian thyroid development may have been acquired during evolution.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping