title: DSCAM: an endogenous promoter drives expression in the developing CNS and neural crest.
abstract: The development of central nervous system (CNS) neuronal networks involves processes including neuroblast migration, axonal pathfinding, and synaptogenesis. To evaluate the role of the axonal guidance molecule DSCAM in CNS connectivity, we generated a lacZ reporter construct, Pr1.8-betagal, containing a 1.8kb fragment of the human DSCAM promoter region, and analyzed its expression in four E12.5 transgenic mouse embryos. We found that Pr1.8-betagal drives lacZ expression in the choroid plexus and roof of the fourth ventricle, the floor plate of the fourth ventricle, pons and medulla oblongata, and the eye, limb buds, and dorsal root ganglion. This recapitulates a subset of DSCAM expression as demonstrated by in situ hybridization, supporting this 1.8kb fragment as a component of the endogenous DSCAM promoter. The Pr1.8-betagal expression pattern supports a role for DSCAM in CNS development, providing an endogenous promoter to investigate the contribution of DSCAM to Down syndrome neural defects.
authors.affiliation: Department of Human Genetics, UCLA and Cedars-Sinai Health System, 8700 Beverly Blvd, Davis Building Room 2069, Los Angeles, CA, USA.
authors.forename: Gillian M
authors.initials: GM
authors.lastname: Barlow
authors.forename: Gary E
authors.initials: GE
authors.lastname: Lyons
authors.forename: James A
authors.initials: JA
authors.lastname: Richardson
authors.forename: Harvey B
authors.initials: HB
authors.lastname: Sarnat
authors.forename: Julie R
authors.initials: JR
authors.lastname: Korenberg
mesh_terms: D016475:3T3 Cells; D000818:Animals; D019556:COS Cells; D015815:Cell Adhesion Molecules; D002460:Cell Line; D002490:Central Nervous System / Q000196:embryology*; D017930:Genes, Reporter; D006801:Humans; D017403:In Situ Hybridization; D007763:Lac Operon; D008565:Membrane Proteins; D051379:Mice; D008822:Mice, Transgenic; D008957:Models, Genetic; D009432:Neural Crest / Q000196:embryology*; D009474:Neurons / Q000378:metabolism; D011401:Promoter Regions, Genetic; D014176:Protein Biosynthesis; D011506:Proteins / Q000235:genetics*; D011784:Quail; D014162:Transfection; D019076:Transgenes
chemical_list: D015815:Cell Adhesion Molecules; C110833:DSCAM protein, human; C491735:Dscam protein, mouse; D008565:Membrane Proteins; D011506:Proteins