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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

The long and short of it: Somite formation in mice.

A fundamental characteristic of the vertebrate body plan is its segmentation along the anterior-posterior axis. This segmental pattern is established during embryogenesis by the formation of somites, the transient epithelial blocks of cells that derive from the unsegmented presomitic mesoderm. Somite formation involves a molecular oscillator, termed the segmentation clock, in combination with gradients of signaling molecules such as fibroblast growth factor 8, WNT3A, and retinoic acid. Disruption of somitogenesis in humans can result in disorders such as spondylocostal dysostosis, which is characterized by vertebral malformations. This review summarizes recent findings concerning the role of Notch signaling in the segmentation clock, the complex regulatory network that governs somitogenesis, the genes that cause inherited spondylocostal dysostosis, and the mechanisms that regulate bilaterally symmetric somite formation.[1]


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