Evolution and cell-type specificity of human-specific genes preferentially expressed in progenitors of fetal neocortex
Evolution and cell-type specificity of human-specific genes preferentially expressed in progenitors of fetal neocortex
Understanding the molecular basis that underlies the expansion of the neocortex during primate, and notably human, evolution requires the identification of genes that are particularly active in the neural stem and progenitor cells of the developing neocortex. Here, we have used existing transcriptome datasets to carry out a comprehensive screen for protein-coding genes preferentially expressed in progenitors of fetal human neocortex. We show that 15 human-specific genes exhibit such expression, and many of them evolved distinct neural progenitor cell-type expression profiles and levels compared to their ancestral paralogs. Functional studies on one such gene, NOTCH2NL, demonstrate its ability to promote basal progenitor proliferation in mice. An additional 35 human genes with progenitor-enriched expression are shown to have orthologs only in primates. Our study provides a resource of genes that are promising candidates to exert specific, and novel, roles in neocortical development during primate, and notably human, evolution.
Primates, QH301-705.5, Science, Neurogenesis, Primates/classification/genetics, Receptor, Notch2/genetics, Neocortex, Neural Stem Cells/cytology/metabolism, Sciences de la santé humaine, Neocortex/cytology/embryology/metabolism, neuroscience, Evolution, Molecular, Cell Proliferation/genetics, developmental biology, Neural Stem Cells, Species Specificity, Embryonic Stem Cells/cytology/metabolism, stem cells, human-specific genes, Neurologie, Animals, Humans, human, Receptor, Notch2, Human health sciences, Biology (General), mouse, Embryonic Stem Cells, neural stem cells, Cell Proliferation, Neurons, primate-specific genes, Gene Expression Profiling, Q, R, Gene Expression Regulation, Developmental, neocortex evolution, neocortex development, Living matter, Neurology, gene evolution, Medicine, Neurogenesis/genetics, Neurons/cytology/metabolism, Developmental Biology
Primates, QH301-705.5, Science, Neurogenesis, Primates/classification/genetics, Receptor, Notch2/genetics, Neocortex, Neural Stem Cells/cytology/metabolism, Sciences de la santé humaine, Neocortex/cytology/embryology/metabolism, neuroscience, Evolution, Molecular, Cell Proliferation/genetics, developmental biology, Neural Stem Cells, Species Specificity, Embryonic Stem Cells/cytology/metabolism, stem cells, human-specific genes, Neurologie, Animals, Humans, human, Receptor, Notch2, Human health sciences, Biology (General), mouse, Embryonic Stem Cells, neural stem cells, Cell Proliferation, Neurons, primate-specific genes, Gene Expression Profiling, Q, R, Gene Expression Regulation, Developmental, neocortex evolution, neocortex development, Living matter, Neurology, gene evolution, Medicine, Neurogenesis/genetics, Neurons/cytology/metabolism, Developmental Biology
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