000117726 001__ 117726
000117726 005__ 20181203021112.0
000117726 0247_ $$2doi$$a10.1126/science.1096049
000117726 037__ $$aARTICLE
000117726 245__ $$aA dual role for Hox genes in limb anterior-posterior asymmetry
000117726 269__ $$a2004
000117726 260__ $$c2004
000117726 336__ $$aJournal Articles
000117726 500__ $$aDepartment of Zoology and Animal Biology and National Program Frontiers in Genetics, University of Geneva, Sciences III, Quai Ernest Ansermet 30, 1211 Geneva 4, Switzerland.
000117726 520__ $$aAnterior-to-posterior patterning, the process whereby our digits are differently shaped, is a key aspect of limb development. It depends on the localized expression in posterior limb bud of Sonic hedgehog (Shh) and the morphogenetic potential of its diffusing product. By using an inversion of and a large deficiency in the mouse HoxD cluster, we found that a perturbation in the early collinear expression of Hoxd11, Hoxd12, and Hoxd13 in limb buds led to a loss of asymmetry. Ectopic Hox gene expression triggered abnormal Shh transcription, which in turn induced symmetrical expression of Hox genes in digits, thereby generating double posterior limbs. We conclude that early posterior restriction of Hox gene products sets up an anterior-posterior prepattern, which determines the localized activation of Shh. This signal is subsequently translated into digit morphological asymmetry by promoting the late expression of Hoxd genes, two collinear processes relying on opposite genomic topographies, upstream and downstream Shh signaling.
000117726 700__ $$aZakany, J.
000117726 700__ $$aKmita, M.
000117726 700__ $$g141236$$aDuboule, D.$$0240276
000117726 773__ $$j304$$tScience$$k5677$$q1669-72
000117726 909C0 $$xU11705$$0252099$$pUPDUB
000117726 909CO $$pSV$$particle$$ooai:infoscience.tind.io:117726
000117726 937__ $$aUPDUB-ARTICLE-2004-005
000117726 973__ $$rREVIEWED$$sPUBLISHED$$aOTHER
000117726 980__ $$aARTICLE