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Ubiquitin C-terminal hydrolase L1 regulates the morphology of neural progenitor cells and modulates their differentiation
- Source :
- Journal of Cell Science. 119:162-171
- Publication Year :
- 2006
- Publisher :
- The Company of Biologists, 2006.
-
Abstract
- Ubiquitin C-terminal hydrolase L1 (UCH-L1) is a component of the ubiquitin system, which has a fundamental role in regulating various biological activities. However, the functional role of the ubiquitin system in neurogenesis is not known. Here we show that UCH-L1 regulates the morphology of neural progenitor cells (NPCs) and mediates neurogenesis. UCH-L1 was expressed in cultured NPCs as well as in embryonic brain. Its expression pattern in the ventricular zone (VZ) changed between embryonic day (E) 14 and E16, which corresponds to the transition from neurogenesis to gliogenesis. At E14, UCH-L1 was highly expressed in the ventricular zone, where neurogenesis actively occurs; whereas its expression was prominent in the cortical plate at E16. UCH-L1 was very weakly detected in the VZ at E16, which corresponds to the start of gliogenesis. In cultured proliferating NPCs, UCH-L1 was co-expressed with nestin, a marker of undifferentiated cells. In differentiating cells, UCH-L1 was highly co-expressed with the early neuronal marker TuJ1. Furthermore, when UCH-L1 was induced in nestin-positive progenitor cells, the number and length of cellular processes of the progenitors decreased, suggesting that the progenitor cells were differentiating. In addition, NPCs derived from gad (UCH-L1-deficient) mice had longer processes compared with controls. The ability of UCH-L1 to regulate the morphology of nestin-positive progenitors was dependent on its binding affinity for ubiquitin but not on hydrolase activity; this result was also confirmed using gad-mouse-derived NPCs. These results suggest that UCH-L1 spatially mediates and enhances neurogenesis in the embryonic brain by regulating progenitor cell morphology.
- Subjects :
- Nerve Tissue Proteins
Ubiquitin C-Terminal Hydrolase
Biology
Cell morphology
Nestin
Mice
Intermediate Filament Proteins
Pregnancy
Tubulin
Morphogenesis
Animals
Humans
Progenitor cell
Cell Shape
Cells, Cultured
Gliogenesis
Progenitor
Neurons
Stem Cells
Neurogenesis
Brain
Cell Differentiation
Cell Biology
Embryo, Mammalian
Molecular biology
Neural stem cell
Cell biology
Mice, Inbred C57BL
Female
Ubiquitin Thiolesterase
Biomarkers
Subjects
Details
- ISSN :
- 14779137 and 00219533
- Volume :
- 119
- Database :
- OpenAIRE
- Journal :
- Journal of Cell Science
- Accession number :
- edsair.doi.dedup.....20433f67344500a5b35071c536ba8d53