Abstract
Higher eukaryotes have developed a number of mechanisms to address the challenge of progressing from a single-cell zygote to a multicellular adult organism. Forming complex structures such as a wing, eye, or a spinal cord requires precise control of cell growth and differentiation. Generating spatial patterns in embryogenesis requires communication between adjacent cells, and secreted proteins are one way by which neighboring cells relay information. The Hedgehog (Hh) family of secreted proteins is critical for the embryonic development of many animals. Hh signaling mechanisms thus provide a window into early development and pattern formation. Genetic screens using Drosophila have revealed a number of components involved in Hh signaling. For many of them, their vertebrate counterparts have been found and this pathway is conserved to a remarkable degree. Furthermore, several components involved in Hh signaling are mutated in human tumors and developmental syndromes, highlighting the importance of this pathway in disease. Recent work has focused on understanding how the various components of the Hh pathway receive and transduce the Hh signal to control cell fate and proliferation decisions. The dissection of the Hh pathway has provided valuable insights into the basic mechanisms of development and disease.
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Bailey, E.C., Scott, M.P., Johnson, R.L. (2000). Hedgehog Signaling in Animal Development and Human Disease. In: Nüsslein-Volhard, C., Krätzschmar, J. (eds) Of Fish, Fly, Worm, and Man. Ernst Schering Research Foundation Workshop, vol 29. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-04264-9_12
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