Clonal analysis reveals granule cell behaviors and compartmentalization that determine the folded morphology of the cerebellum
| العنوان: | Clonal analysis reveals granule cell behaviors and compartmentalization that determine the folded morphology of the cerebellum |
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| المؤلفون: | Elyn Riedel, Emilie Legué, Alexandra L. Joyner |
| المصدر: | Development. |
| بيانات النشر: | The Company of Biologists, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Cerebellum, Cell division, Organogenesis, Morphogenesis, Biology, Mice, Imaging, Three-Dimensional, Neural Stem Cells, Interneurons, Cell Clone, Cell polarity, Biological neural network, medicine, Animals, Cell Lineage, Molecular Biology, Research Articles, Cell Proliferation, Phenylurea Compounds, Cell Polarity, Anatomy, Granule cell, Immunohistochemistry, Neural stem cell, Cell biology, medicine.anatomical_structure, Microscopy, Fluorescence, Cell Division, Developmental Biology |
| الوصف: | The mammalian cerebellum consists of folds of different sizes and shapes that house distinct neural circuits. A crucial factor underlying foliation is the generation of granule cells (gcs), the most numerous neuron type in the brain. We used clonal analysis to uncover global as well as folium size-specific cellular behaviors that underlie cerebellar morphogenesis. Unlike most neural precursors, gc precursors divide symmetrically, accounting for their massive expansion. We found that oriented cell divisions underlie an overall anteroposteriorly polarized growth of the cerebellum and gc clone geometry. Clone geometry is further refined by mediolateral oriented migration and passive dispersion of differentiating gcs. Most strikingly, the base of each fissure acts as a boundary for gc precursor dispersion, which we propose allows each folium to be regulated as a developmental unit. Indeed, the geometry and size of clones in long and short folia are distinct. Moreover, in engrailed 1/2 mutants with shorter folia, clone cell number and geometry are most similar to clones in short folia of wild-type mice. Thus, the cerebellum has a modular mode of development that allows the plane of cell division and number of divisions to be differentially regulated to ensure that the appropriate number of cells are partitioned into each folium. |
| تدمد: | 1477-9129 0950-1991 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29e48320a1d458cf3e12b30b4856024dTest https://doi.org/10.1242/dev.120287Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....29e48320a1d458cf3e12b30b4856024d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14779129 09501991 |
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