PMID- 7568099 OWN - NLM STAT- MEDLINE DCOM- 19951027 LR - 20190501 IS - 0027-8424 (Print) IS - 1091-6490 (Electronic) IS - 0027-8424 (Linking) VI - 92 IP - 20 DP - 1995 Sep 26 TI - Down syndrome-critical region contains a gene homologous to Drosophila sim expressed during rat and human central nervous system development. PG - 9191-5 AB - Many features of Down syndrome might result from the overdosage of only a few genes located in a critical region of chromosome 21. To search for these genes, cosmids mapping in this region were isolated and used for trapping exons. One of the trapped exons obtained has a sequence very similar to part of the Drosophila single-minded (sim) gene, a master regulator of the early development of the fly central nervous system midline. Mapping data indicated that this exonic sequence is only present in the Down syndrome-critical region in the human genome. Hybridization of this exonic sequence with human fetal kidney poly(A)+ RNA revealed two transcripts of 6 and 4.3 kb. In situ hybridization of a probe derived from this exon with human and rat fetuses showed that the corresponding gene is expressed during early fetal life in the central nervous system and in other tissues, including the facial, skull, palate, and vertebra primordia. The expression pattern of this gene suggests that it might be involved in the pathogenesis of some of the morphological features and brain anomalies observed in Down syndrome. FAU - Dahmane, N AU - Dahmane N AD - Unite de Recherche Associee 1335 Centre National de la Recherche Scientifique, Hopital Necker, Paris, France. FAU - Charron, G AU - Charron G FAU - Lopes, C AU - Lopes C FAU - Yaspo, M L AU - Yaspo ML FAU - Maunoury, C AU - Maunoury C FAU - Decorte, L AU - Decorte L FAU - Sinet, P M AU - Sinet PM FAU - Bloch, B AU - Bloch B FAU - Delabar, J M AU - Delabar JM LA - eng SI - GENBANK/X84790 PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Proc Natl Acad Sci U S A JT - Proceedings of the National Academy of Sciences of the United States of America JID - 7505876 RN - 0 (Basic Helix-Loop-Helix Transcription Factors) RN - 0 (DNA-Binding Proteins) RN - 0 (Drosophila Proteins) RN - 0 (Nuclear Proteins) RN - 0 (Oligonucleotide Probes) RN - 0 (RNA, Messenger) RN - 0 (sim protein, Drosophila) SB - IM MH - Amino Acid Sequence MH - Animals MH - Base Sequence MH - Basic Helix-Loop-Helix Transcription Factors MH - Central Nervous System/*embryology MH - Chromosomes, Human, Pair 21 MH - Cosmids MH - DNA-Binding Proteins/biosynthesis/*genetics MH - Down Syndrome/*genetics MH - Drosophila/embryology/*genetics MH - Drosophila Proteins MH - Embryonic and Fetal Development MH - Exons MH - *Gene Expression MH - *Genes, Insect MH - *Genes, Regulator MH - Genome, Human MH - Helix-Loop-Helix Motifs MH - Humans MH - In Situ Hybridization, Fluorescence MH - Kidney/embryology/metabolism MH - Molecular Sequence Data MH - Nuclear Proteins/biosynthesis/*genetics MH - Oligonucleotide Probes MH - Organ Specificity MH - RNA, Messenger/analysis/biosynthesis MH - Rats MH - Sequence Homology, Amino Acid MH - Sequence Homology, Nucleic Acid MH - Sequence Tagged Sites PMC - PMC40950 EDAT- 1995/09/26 00:00 MHDA- 1995/09/26 00:01 PMCR- 1996/03/26 CRDT- 1995/09/26 00:00 PHST- 1995/09/26 00:00 [pubmed] PHST- 1995/09/26 00:01 [medline] PHST- 1995/09/26 00:00 [entrez] PHST- 1996/03/26 00:00 [pmc-release] AID - 10.1073/pnas.92.20.9191 [doi] PST - ppublish SO - Proc Natl Acad Sci U S A. 1995 Sep 26;92(20):9191-5. doi: 10.1073/pnas.92.20.9191.