title: Evidence for genetic control of Sonic hedgehog by Gli3 in mouse limb development.
abstract: Sonic hedgehog (Shh) expression in the developing limb is associated with the zone of polarising activity (ZPA), and both are restricted to the posterior part of the limb bud. We show that the expression patterns of Shh and Gli3, a member of the Gli-family believed to function in transcriptional control, appear to be mutually exclusive in limb buds of mouse embryos. In the polydactyly mouse mutant extra toes (Xt), possessing a null mutation of Gli3, Shh is additionally expressed in the anterior region of the limb bud. The transcript of Ptc, the putative receptor for Shh protein, can be detected anteriorly as well. Other genes known to be involved in limb outgrowth and patterning, like Fibroblast growth factor (Fgf), Bone morphogenetic protein (Bmp), and Hoxd are misexpressed in relation to the ectopic Shh expression domain in Xt limb buds. This data suggest that Gli3 is a regulator of Shh expression in mouse limb development.
authors.affiliation: Institut für Molekularbiologie, Medizinische Hochschule Hannover, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Büscher
authors.forename: B
authors.initials: B
authors.lastname: Bosse
authors.forename: J
authors.initials: J
authors.lastname: Heymer
authors.forename: U
authors.initials: U
authors.lastname: Rüther
mesh_terms: D000818:Animals; D055396:Bone Morphogenetic Protein 2; D055415:Bone Morphogenetic Protein 4; D055419:Bone Morphogenetic Protein 7; D019485:Bone Morphogenetic Proteins / Q000378:metabolism*; D004268:DNA-Binding Proteins / Q000378:metabolism*; D029721:Drosophila Proteins; D005121:Extremities / Q000196:embryology / Q000502:physiology*; D051519:Fibroblast Growth Factor 4; D051524:Fibroblast Growth Factor 8; D005346:Fibroblast Growth Factors / Q000378:metabolism*; D018507:Gene Expression Regulation, Developmental; D006133:Growth Substances / Q000378:metabolism; D053823:Hedgehog Proteins; D018398:Homeodomain Proteins / Q000378:metabolism; D017403:In Situ Hybridization; D019476:Insect Proteins / Q000378:metabolism; D051741:Kruppel-Like Transcription Factors; D008565:Membrane Proteins / Q000378:metabolism; D051379:Mice; D008809:Mice, Inbred C3H; D009154:Mutation; D009419:Nerve Tissue Proteins; D017689:Polydactyly / Q000235:genetics; D011506:Proteins / Q000378:metabolism*; D011518:Proto-Oncogene Proteins / Q000378:metabolism; D011956:Receptors, Cell Surface; D012097:Repressor Proteins; D015534:Trans-Activators; D014157:Transcription Factors; D016212:Transforming Growth Factor beta; D029867:Xenopus Proteins; D000074290:Zinc Finger Protein Gli3
chemical_list: C525719:Bmp2 protein, mouse; C525810:Bmp4 protein, mouse; D055396:Bone Morphogenetic Protein 2; D055415:Bone Morphogenetic Protein 4; D055419:Bone Morphogenetic Protein 7; D019485:Bone Morphogenetic Proteins; D004268:DNA-Binding Proteins; D029721:Drosophila Proteins; C496446:Fgf4 protein, mouse; C496457:Fgf8 protein, mouse; D051519:Fibroblast Growth Factor 4; C108003:GLI3 protein, Xenopus; C065683:GLI3 protein, human; C465571:Gli3 protein, mouse; D006133:Growth Substances; D053823:Hedgehog Proteins; D018398:Homeodomain Proteins; D019476:Insect Proteins; D051741:Kruppel-Like Transcription Factors; D008565:Membrane Proteins; D009419:Nerve Tissue Proteins; D011506:Proteins; D011518:Proto-Oncogene Proteins; D011956:Receptors, Cell Surface; D012097:Repressor Proteins; C509239:SHH protein, human; D015534:Trans-Activators; D014157:Transcription Factors; D016212:Transforming Growth Factor beta; D029867:Xenopus Proteins; D000074290:Zinc Finger Protein Gli3; C525812:bmp4 protein, Xenopus; C525822:bmp7.1 protein, Xenopus; C070844:ptc protein, Drosophila; D051524:Fibroblast Growth Factor 8; D005346:Fibroblast Growth Factors