title: A yeast artificial chromosome containing the human preprotachykinin-A gene expresses substance P in mice and drives appropriate marker-gene expression during early brain embryogenesis.
abstract: We have produced a yeast artificial chromosome (YAC) transgenic model containing the human preprotachykinin-A gene (hPPTA) that can drive appropriate expression of beta-galactosidase within the adult mouse brain. Here, we investigate its embryonic expression to assess the transcriptional regulation of the PPTA gene during the development of several neural pathways later affected by disease in humans. We demonstrate that the human PPTA gene regulatory region is active in appropriate areas of the developing brain at significantly earlier time points than has been previously reported. Furthermore, despite replacement of most of the 3' untranslated region by the marker gene cassette, the modified human YAC is able to express substance P (SP) on a murine SP/NKA(-/-) background. This transgenic model, in addition to being valuable in examining the hPPTA regulatory region, will also prove to be important in exploring the downstream function of the gene in the adult and the embryo brain.
authors.affiliation: Institute of Medical Sciences, Department of Molecular and Cell Biology, University of Aberdeen, Aberdeen, AB25 2ZD, Scotland.
authors.forename: Alasdair
authors.initials: A
authors.lastname: MacKenzie
authors.forename: John
authors.initials: J
authors.lastname: Quinn
mesh_terms: D000679:Amygdala / Q000196:embryology / Q000502:physiology; D000818:Animals; D001921:Brain / Q000196:embryology* / Q000502:physiology*; D018244:Chromosomes, Artificial, Yeast / Q000235:genetics*; D003342:Corpus Striatum / Q000196:embryology / Q000502:physiology; D005260:Female; D005727:Ganglia, Spinal / Q000196:embryology / Q000502:physiology; D018507:Gene Expression Regulation, Developmental; D005819:Genetic Markers; D006624:Hippocampus / Q000196:embryology / Q000502:physiology; D006801:Humans; D007763:Lac Operon; D008297:Male; D008636:Mesencephalon / Q000196:embryology / Q000502:physiology; D051379:Mice; D018345:Mice, Knockout; D015288:Neurokinin A / Q000235:genetics; D011247:Pregnancy; D011498:Protein Precursors / Q000235:genetics*; D011499:Protein Processing, Post-Translational / Q000502:physiology; D012326:RNA Splicing / Q000502:physiology; D012249:Rhombencephalon / Q000196:embryology / Q000502:physiology; D013116:Spinal Cord / Q000196:embryology / Q000502:physiology; D013373:Substance P / Q000235:genetics*; D015320:Tachykinins / Q000235:genetics*; D014158:Transcription, Genetic / Q000502:physiology
chemical_list: D005819:Genetic Markers; D011498:Protein Precursors; D015320:Tachykinins; C044206:preprotachykinin; D013373:Substance P; D015288:Neurokinin A