Engrailed genes control developmental fate of serotonergic and noradrenergic neurons in mid- and hindbrain in a gene dose-dependent manner
| Autor: | Dennis D.M. O'Leary, Horst H. Simon, Christian Scholz |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Serotonin
Gene Dosage Nerve Tissue Proteins Hindbrain Wnt1 Protein Biology Serotonergic Mice Norepinephrine Cellular and Molecular Neuroscience Dorsal raphe nucleus Mesencephalon Animals Molecular Biology Transcription factor Homeodomain Proteins Mice Knockout Neurons Regulation of gene expression Gene Expression Regulation Developmental Cell Differentiation Cell Biology Phenotype engrailed Rhombencephalon Wnt Proteins Mutation Intercellular Signaling Peptides and Proteins Raphe Nuclei Homeobox Locus Coeruleus Neuroscience Brain Stem |
| Zdroj: | Molecular and Cellular Neuroscience. 28:96-105 |
| ISSN: | 1044-7431 |
| DOI: | 10.1016/j.mcn.2004.08.016 |
| Popis: | In vertebrates and insects, the homeobox transcription factors of the engrailed family have a dual function. They take part in regionalization during early embryogenesis and later in neuronal specification. In mammals, two engrailed homologues exist, engrailed-1 and engrailed-2, which are expressed in a broad band around the isthmus at an age when the serotonergic and noradrenergic neurons in mid/hindbrain are generated. The analysis of engrailed-1 and -2 double mutant mice revealed a specific, redundant, and gene dose-dependent requirement of the two transcription factors for the development of the serotonergic dorsal raphe nucleus and the noradrenergic locus caeruleus. Both nuclei are lost in engrailed double mutant mice; however, directly adjacent nuclei of the same neurotransmitter phenotype are not affected. An almost identical phenotype is found in mutant mice null for Wnt1, indicating that the engrailed genes provide essential positional information for the development of the two nuclei during early embryogenesis. |
| Databáze: | OpenAIRE |
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