|Title||Localised axial progenitor cell populations in the avian tail bud are not committed to a posterior Hox identity.|
|Publication Type||Journal Article|
|Year of Publication||2008|
|Authors||McGrew MJ, Sherman A, Lillico SG, Ellard FM, Radcliffe PA, Gilhooley HJ, Mitrophanous KA, Cambray N, Wilson V, Sang HM|
|Date Published||2008 Jul|
|Keywords||Animals, Animals, Genetically Modified, Cell Count, Cell Differentiation, Chick Embryo, Gene Expression Regulation, Developmental, Homeodomain Proteins, Mice, Neurons, Stem Cell Transplantation, Stem Cells, Tail|
The outgrowth of the vertebrate tail is thought to involve the proliferation of regionalised stem/progenitor cell populations formed during gastrulation. To follow these populations over extended periods, we used cells from GFP-positive transgenic chick embryos as a source for donor tissue in grafting experiments. We determined that resident progenitor cell populations are localised in the chicken tail bud. One population, which is located in the chordoneural hinge (CNH), contributes descendants to the paraxial mesoderm, notochord and neural tube, and is serially transplantable between embryos. A second population of mesodermal progenitor cells is located in a separate dorsoposterior region of the tail bud, and a corresponding population is present in the mouse tail bud. Using heterotopic transplantations, we show that the fate of CNH cells depends on their environment within the tail bud. Furthermore, we show that the anteroposterior identity of tail bud progenitor cells can be reset by heterochronic transplantation to the node region of gastrula-stage chicken embryos.
|Grant List||/ / Biotechnology and Biological Sciences Research Council / United Kingdom|