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J. Dev. Biol. 2017, 5(2), 4; doi:10.3390/jdb5020004

Moving the Shh Source over Time: What Impact on Neural Cell Diversification in the Developing Spinal Cord?

Centre de Biologie du Développement (CBD) CNRS/UPS, Centre de Biologie Intégrative (CBI), Université de Toulouse, 31520 Toulouse, France
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Academic Editors: Henk Roelink and Simon J. Conway
Received: 28 February 2017 / Revised: 29 March 2017 / Accepted: 6 April 2017 / Published: 12 April 2017
(This article belongs to the Special Issue Hedgehog Signaling in Embryogenesis)
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Abstract

A substantial amount of data has highlighted the crucial influence of Shh signalling on the generation of diverse classes of neurons and glial cells throughout the developing central nervous system. A critical step leading to this diversity is the establishment of distinct neural progenitor cell domains during the process of pattern formation. The forming spinal cord, in particular, has served as an excellent model to unravel how progenitor cells respond to Shh to produce the appropriate pattern. In recent years, considerable advances have been made in our understanding of important parameters that control the temporal and spatial interpretation of the morphogen signal at the level of Shh-receiving progenitor cells. Although less studied, the identity and position of Shh source cells also undergo significant changes over time, raising the question of how moving the Shh source contributes to cell diversification in response to the morphogen. Here, we focus on the dynamics of Shh-producing cells and discuss specific roles for these time-variant Shh sources with regard to the temporal events occurring in the receiving field. View Full-Text
Keywords: Sonic Hedgehog; neural tube patterning; notochord; medial floor plate; lateral floor plate; neurons; glial cells; amniotes; zebrafish Sonic Hedgehog; neural tube patterning; notochord; medial floor plate; lateral floor plate; neurons; glial cells; amniotes; zebrafish
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Danesin, C.; Soula, C. Moving the Shh Source over Time: What Impact on Neural Cell Diversification in the Developing Spinal Cord? J. Dev. Biol. 2017, 5, 4.

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