Abstract
Secreted molecules encoded by the Hedgehog (Hh) gene family have emerged as key signals in regulating the growth and patterning of invertebrate and vertebrate embryos. One of the most prominent features among Hh members is thought to reside in their ability to impose distinct cell fates in a concentration-dependent manner. This ability is highlighted by the critical and indispensable role of Sonic hedgehog (Shh) signaling in specifying the anterior-posterior polarity of the embryonic limb. Alteration of Shh expression and signaling activity can lead to profound developmental abnormalities in digit numbers and identity in mice and humans. In this chapter, we discuss the Shh regulatory mechanism that establishes the anterior-posterior polarity of the limb and how misregulation of this mechanism can lead to severe limb malformations in humans.
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Chiang, C. (2006). From Oligodactyly to Polydactyly. In: Hedgehog-Gli Signaling in Human Disease. Molecular Biology Intelligence Unit. Springer, Boston, MA. https://doi.org/10.1007/0-387-33777-6_11
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DOI: https://doi.org/10.1007/0-387-33777-6_11
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-387-25784-6
Online ISBN: 978-0-387-33777-7
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