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WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY
Volume 1, Issue 6, Pages 803-822Publisher
WILEY-BLACKWELL
DOI: 10.1002/wdev.59
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This review focuses predominantly on the human congenital malformations caused by alterations affecting the morphoregulatory gene networks that control early limb bud patterning and outgrowth. Limb defects are among the most frequent congenital malformations in humans that are caused by genetic mutations or teratogenic effects resulting either in abnormal, loss of, or additional skeletal elements. Spontaneous and engineered mouse models have been used to identify and study the molecular alterations and disrupted gene networks that underlie human congenital limb malformations. More recently, mouse genetics has begun to reveal the alterations that affect the often-large cis-regulatory landscapes that control gene expression in limb buds and cause devastating effects on limb bud development. These findings have paved the way to identifying mutations in cis-regulatory regions as causal to an increasing number of congenital limb malformations in humans. In these cases, no mutations in the coding region of a presumed candidate were previously detected. This review highlights how the current understanding of the molecular gene networks and interactions that control mouse limb bud development provides insight into the etiology of human congenital limb malformations. (c) 2012 Wiley Periodicals, Inc.
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