Zinc finger transcription factor Casz1 expression is regulated by homeodomain transcription factor Prrxl1 in embryonic spinal dorsal horn late-born excitatory interneurons
| Autor: | Carlos Reguenga, C. Monteiro, Filipe Monteiro, Sandra Rebelo, Luís Midão, Deolinda Lima |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Spinal Cord Dorsal Horn Heart morphogenesis Interneuron Nerve Tissue Proteins Biology Mice 03 medical and health sciences Dorsal root ganglion Interneurons Ganglia Spinal medicine Animals Transcription factor Homeodomain Proteins Mice Knockout Zinc finger transcription factor General Neuroscience Cell Differentiation Anatomy Spinal cord Cell biology DNA-Binding Proteins 030104 developmental biology medicine.anatomical_structure nervous system GDF7 Female Transcription Factors |
| Zdroj: | European Journal of Neuroscience. 43:1449-1459 |
| ISSN: | 0953-816X |
| DOI: | 10.1111/ejn.13214 |
| Popis: | The transcription factor Casz1 is required for proper assembly of vertebrate vasculature and heart morphogenesis as well as for temporal control of Drosophila neuroblasts and mouse retina progenitors in the generation of different cell types. Although Casz1 function in the mammalian nervous system remains largely unexplored, Casz1 is expressed in several regions of this system. Here we provide a detailed spatiotemporal characterization of Casz1 expression along mouse dorsal root ganglion (DRG) and dorsal spinal cord development by immunochemistry. In the DRG, Casz1 is broadly expressed in sensory neurons since they are born until perinatal age. In the dorsal spinal cord, Casz1 displays a more dynamic pattern being first expressed in dorsal interneuron 1 (dI1) progenitors and their derived neurons and then in a large subset of embryonic dorsal late-born excitatory (dILB) neurons that narrows gradually to become restricted perinatally to the inner portion. Strikingly, expression analyses using Prrxl1-knockout mice revealed that Prrxl1, a key transcription factor in the differentiation of dILB neurons, is a positive regulator of Casz1 expression in the embryonic dorsal spinal cord but not in the DRG. By performing chromatin immunoprecipitation in the dorsal spinal cord, we identified two Prrxl1-bound regions within Casz1 introns, suggesting that Prrxl1 directly regulates Casz1 transcription. Our work reveals that Casz1 lies downstream of Prrxl1 in the differentiation pathway of a large subset of dILB neurons and provides a framework for further studies of Casz1 in assembly of the DRG-spinal circuit. |
| Databáze: | OpenAIRE |
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