cdx4 mutants fail to specify blood progenitors and can be rescued by multiple hox genes
- Davidson, A.J., Ernst, P., Wang, Y., Dekens, M.P., Kingsley, P.D., Palis, J., Korsmeyer, S.J., Daley, G.Q., and Zon, L.I.
- Nature 425(6955): 300-306 (Journal)
- Registered Authors
- Davidson, Alan, Dekens, Marcus P.S., Kingsley, David, Zon, Leonard I.
- MeSH Terms
- Body Patterning
- Cell Line
- Cloning, Molecular
- Gene Expression Regulation, Developmental
- Genes, Homeobox/genetics
- Genes, Homeobox/physiology*
- Hematopoietic Stem Cells/cytology
- Hematopoietic Stem Cells/metabolism*
- Homeodomain Proteins/genetics
- Homeodomain Proteins/metabolism*
- Molecular Sequence Data
- Multigene Family/genetics
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Zebrafish Proteins/genetics
- Zebrafish Proteins/metabolism*
- 13679919 Full text @ Nature
Davidson, A.J., Ernst, P., Wang, Y., Dekens, M.P., Kingsley, P.D., Palis, J., Korsmeyer, S.J., Daley, G.Q., and Zon, L.I. (2003) cdx4 mutants fail to specify blood progenitors and can be rescued by multiple hox genes. Nature. 425(6955):300-306.
Organogenesis is dependent on the formation of distinct cell types within the embryo. Important to this process are the hox genes, which are believed to confer positional identities to cells along the anteroposterior axis. Here, we have identified the caudal-related gene cdx4 as the locus mutated in kugelig (kgg), a zebrafish mutant with an early defect in haematopoiesis that is associated with abnormal anteroposterior patterning and aberrant hox gene expression. The blood deficiency in kgg embryos can be rescued by overexpressing hoxb7a or hoxa9a but not hoxb8a, indicating that the haematopoietic defect results from perturbations in specific hox genes. Furthermore, the haematopoietic defect in kgg mutants is not rescued by scl overexpression, suggesting that cdx4 and hox genes act to make the posterior mesoderm competent for blood development. Overexpression of cdx4 during zebrafish development or in mouse embryonic stem cells induces blood formation and alters hox gene expression. Taken together, these findings demonstrate that cdx4 regulates hox genes and is necessary for the specification of haematopoietic cell fate during vertebrate embryogenesis.
Genes / Markers
Mutation and Transgenics
Human Disease / Model Data
Sequence Targeting Reagents
Engineered Foreign Genes
Errata and Notes