Publication Date:
2015-02-28
Description:
Evolutionary expansion of the human neocortex reflects increased amplification of basal progenitors in the subventricular zone, producing more neurons during fetal corticogenesis. In this work, we analyze the transcriptomes of distinct progenitor subpopulations isolated by a cell polarity-based approach from developing mouse and human neocortex. We identify 56 genes preferentially expressed in human apical and basal radial glia that lack mouse orthologs. Among these, ARHGAP11B has the highest degree of radial glia-specific expression. ARHGAP11B arose from partial duplication of ARHGAP11A (which encodes a Rho guanosine triphosphatase-activating protein) on the human lineage after separation from the chimpanzee lineage. Expression of ARHGAP11B in embryonic mouse neocortex promotes basal progenitor generation and self-renewal and can increase cortical plate area and induce gyrification. Hence, ARHGAP11B may have contributed to evolutionary expansion of human neocortex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Florio, Marta -- Albert, Mareike -- Taverna, Elena -- Namba, Takashi -- Brandl, Holger -- Lewitus, Eric -- Haffner, Christiane -- Sykes, Alex -- Wong, Fong Kuan -- Peters, Jula -- Guhr, Elaine -- Klemroth, Sylvia -- Prufer, Kay -- Kelso, Janet -- Naumann, Ronald -- Nusslein, Ina -- Dahl, Andreas -- Lachmann, Robert -- Paabo, Svante -- Huttner, Wieland B -- New York, N.Y. -- Science. 2015 Mar 27;347(6229):1465-70. doi: 10.1126/science.aaa1975. Epub 2015 Feb 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Planck Institute of Molecular Cell Biology and Genetics (MPI-CBG), Pfotenhauerstrasse 108, D-01307 Dresden, Germany. ; Technische Universitat Dresden, Center for Regenerative Therapies Dresden, Fetscherstrasse 105, D-01307 Dresden, Germany. ; Max Planck Institute for Evolutionary Anthropology (MPI-EVA), Deutscher Platz 6, D-04103 Leipzig, Germany. ; Technische Universitat Dresden, Universitatsklinikum Carl Gustav Carus, Klinik und Poliklinik fur Frauenheilkunde und Geburtshilfe, Fetscherstrasse 74, D-01307 Dresden, Germany. ; Max Planck Institute of Molecular Cell Biology and Genetics (MPI-CBG), Pfotenhauerstrasse 108, D-01307 Dresden, Germany. huttner@mpi-cbg.de.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25721503" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Cell Separation
;
GTPase-Activating Proteins/chemistry/genetics/*physiology
;
Gene Duplication
;
*Gene Expression Regulation, Developmental
;
Humans
;
Lateral Ventricles/cytology
;
Mice
;
Neocortex/cytology/*embryology/metabolism
;
Neural Stem Cells/*cytology/metabolism
;
Neurogenesis/*genetics
;
Neuroglia/cytology/metabolism
;
Neurons/cytology/metabolism
;
Protein Structure, Tertiary
;
Transcriptome
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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