Regulation of zebrafish skeletogenesis by ext2/dackel and papst1/pinscher
- Clément, A., Wiweger, M., von der Hardt, S., Rusch, M.A., Selleck, S.B., Chien, C.B., and Roehl, H.H.
- PLoS Genetics 4(7): e1000136 (Journal)
- Registered Authors
- Chien, Chi-Bin, Roehl, Henry, von der Hardt, Sophia
- Chondrocytes, Larvae, Cartilage, Zebrafish, Embryos, Bone development, Morphogenesis, Sulfates
- MeSH Terms
- Anion Transport Proteins/genetics*
- Anion Transport Proteins/physiology
- Cloning, Molecular
- Embryo, Nonmammalian
- Gene Expression Regulation, Developmental*
- Genetic Markers
- Loss of Heterozygosity
- Microsatellite Repeats
- Models, Animal
- Physical Chromosome Mapping
- RNA, Messenger/metabolism
- Zebrafish/growth & development*
- Zebrafish Proteins/genetics*
- Zebrafish Proteins/physiology
- 18654627 Full text @ PLoS Genet.
Clément, A., Wiweger, M., von der Hardt, S., Rusch, M.A., Selleck, S.B., Chien, C.B., and Roehl, H.H. (2008) Regulation of zebrafish skeletogenesis by ext2/dackel and papst1/pinscher. PLoS Genetics. 4(7):e1000136.
Mutations in human Exostosin genes (EXTs) confer a disease called Hereditary Multiple Exostoses (HME) that affects 1 in 50,000 among the general population. Patients with HME have a short stature and develop osteochondromas during childhood. Here we show that two zebrafish mutants, dackel (dak) and pinscher (pic), have cartilage defects that strongly resemble those seen in HME patients. We have previously determined that dak encodes zebrafish Ext2. Positional cloning of pic reveals that it encodes a sulphate transporter required for sulphation of glycans (Papst1). We show that although both dak and pic are required during cartilage morphogenesis, they are dispensable for chondrocyte and perichondral cell differentiation. They are also required for hypertrophic chondrocyte differentiation and osteoblast differentiation. Transplantation analysis indicates that dak(-/-) cells are usually rescued by neighbouring wild-type chondrocytes. In contrast, pic(-/-) chondrocytes always act autonomously and can disrupt the morphology of neighbouring wild-type cells. These findings lead to the development of a new model to explain the aetiology of HME.
Genes / Markers
Mutation and Transgenics
Human Disease / Model Data
Sequence Targeting Reagents
Engineered Foreign Genes
Errata and Notes