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Cyclic dermal BMP signalling regulates stem cell activation during hair regeneration
In the age of stem cell engineering it is critical to understand how stem cell activity is regulated during regeneration. Hairs are mini-organs that undergo cyclic regeneration throughout adult life,Expand
Local inhibitory action of BMPs and their relationships with activators in feather formation: implications for periodic patterning.
The formation of periodic patterns is fundamental in biology. Theoretical models describing these phenomena have been proposed for feather patterning; however, no molecular candidates have beenExpand
An Integrated Gene Regulatory Network Controls Stem Cell Proliferation in Teeth
Epithelial stem cells reside in specific niches that regulate their self-renewal and differentiation, and are responsible for the continuous regeneration of tissues such as hair, skin, and gut.Expand
An integrative approach to understanding bird origins
Background The origin of birds is one of the most enduring and dramatic evolutionary debates. The hypothesis that the primarily small-sized birds are nested within a theropod dinosaur group thatExpand
Molecular Shaping of the Beak
Beak shape is a classic example of evolutionary diversification. Beak development in chicken and duck was used to examine morphological variations among avian species. There is only one proliferativeExpand
Morphoregulation of avian beaks: Comparative mapping of growth zone activities and morphological evolution
Avian beak diversity is a classic example of morphological evolution. Recently, we showed that localized cell proliferation mediated by bone morphogenetic protein 4 (BMP4) can explain the differentExpand
Adhesion molecules in skeletogenesis: II. Neural cell adhesion molecules mediate precartilaginous mesenchymal condensations and enhance chondrogenesis
Neural cell adhesion molecules (NCAM) was expressed transiently by mesenchymal cells in precartilaginous condensations of the embryonic chicken limb but was lost upon differentiation into cartilage.Expand
`Cyclic alopecia' in Msx2 mutants: defects in hair cycling and hair shaft differentiation
Msx2-deficient mice exhibit progressive hair loss, starting at P14 and followed by successive cycles of wavelike regrowth and loss. During the hair cycle, Msx2 deficiency shortens anagen phase, butExpand
Self-organization of periodic patterns by dissociated feather mesenchymal cells and the regulation of size, number and spacing of primordia.
Periodic patterning is a fundamental organizing process in biology. Using a feather reconstitution assay, we traced back to the initial stage of the patterning process. Cells started from anExpand
The developmental biology of feather follicles
ABSTRACT The feather is a complex epidermal organ with hierarchical branches and represents a multi-layered topological transformation of keratinocyte sheets. Feathers are made in feather follicles.Expand
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