Similar Datasets
Project description:Forming tight interaction with both Purkinje and granule cells (GCs), Bergmann glia (BG) are essential for cerebellar morphogenesis and neuronal homeostasis. However, how BG act in this process is unclear without comprehensive transcriptome landscape of BG. Here, high temporal-resolution investigation of transcriptomes with FACS-sorted BG revealed the dynamic expression of genes within given functions and pathways enabled BG to assist neural migration and construct neuron-glia network. It is found that the peak time of GCs migration (P7-10) strikingly coincides with the downregulation of extracellular matrix (ECM) related genes, and the disruption of which by Setdb1 ablation at P7-10 in BG leads to significant migration defect of GCs emphasizing the criticality of Nfix-Setdb1 mediated H3K9me3 repressive complex for the precise regulation of GCs migration in vivo. Thus, BG's transcriptomic landscapes offer an insight into the mechanism by which BG are in depth integrated in cerebellar neural network.
| S-EPMC8132163 | biostudies-literature
Project description:Forming tight interaction with both Purkinje and granule cells (GCs), Bergmann glia (BG) are essential for cerebellar morphogenesis and neuronal homeostasis. However, how BG act in this process is unclear without comprehensively transcriptomic landscape of BG. Here, high temporal-resolution investigation of transcriptomes with FACS-sorted BG revealed the dynamic of genes within given functions and pathways enabled BG to assist neural migration and construct neuron-glia network. We found the peak time of GCs migration (P7-10) was strikingly coincided with the downregulation of extracellular matrix (ECM) related genes by prevailing transcriptional repression, and the disrupting of which by Setdb1 ablation at P7-10 in BG led to the significant migration defect of GCs by abnormal ECM expression emphasizing the criticality of Nfix-Setdb1 mediated H3K9me3 repressive complex for the precise regulation of GCs migration in vivo. Thus, BG’s transcriptomic landscapes offer an insight into the mechanism by which BG are in-depth integrated in cerebellar neural network.
2021-04-14 | GSE155871 | GEO
Project description:Forming tight interaction with both Purkinje and granule cells (GCs), Bergmann glia (BG) are essential for cerebellar morphogenesis and neuronal homeostasis. However, how BG act in this process is unclear without comprehensively transcriptomic landscape of BG. Here, high temporal-resolution investigation of transcriptomes with FACS-sorted BG revealed the dynamic of genes within given functions and pathways enabled BG to assist neural migration and construct neuron-glia network. We found the peak time of GCs migration (P7-10) was strikingly coincided with the downregulation of extracellular matrix (ECM) related genes by prevailing transcriptional repression, and the disrupting of which by Setdb1 ablation at P7-10 in BG led to the significant migration defect of GCs by abnormal ECM expression emphasizing the criticality of Nfix-Setdb1 mediated H3K9me3 repressive complex for the precise regulation of GCs migration in vivo. Thus, BG’s transcriptomic landscapes offer an insight into the mechanism by which BG are in-depth integrated in cerebellar neural network.
2021-04-14 | GSE155872 | GEO
Project description:Temporarily epigenetic repression in Bergmann glia regulates the migration of Granule cells
| PRJNA655903 | ENA
Project description:Temporarily epigenetic repression in Bergmann glia regulates the migration of Granule cells (RNA-seq)
| PRJNA655904 | ENA
Project description:Temporarily epigenetic repression in Bergmann glia regulates the migration of Granule cells (ChIP-seq)
| PRJNA655905 | ENA
Project description:Proper cerebellar development is dependent on tightly regulated proliferation, migration, and differentiation events. Disruptions in any of these leads to a range of cerebellar phenotypes from ataxia to childhood tumors. Animal models have shown that proper regulation of sonic hedgehog (Shh) signaling is crucial for normal cerebellar architecture, and increased signaling leads to cerebellar tumor formation. Primary cilia are known to be required for the proper regulation of multiple developmental signaling pathways, including Shh. Tetratricopeptide Repeat Domain 21B (Ttc21b) is required for proper primary cilia form and function, and is primarily thought to restrict Shh signaling. Here we investigated a role for Ttc21b in cerebellar development. Surprisingly, Ttc21b ablation in Bergmann glia resulted in the accumulation of ectopic granule cells in the lower/posterior lobes of the cerebellum and a reduction in Shh signaling. Ttc21b ablation in just Purkinje cells resulted in a similar phenotype seen in fewer cells, but across the entire extent of the cerebellum. These results suggest that Ttc21b expression is required for Bergmann glia structure and signaling in the developing cerebellum, and in some contexts, augments rather than attenuates Shh signaling.
| S-EPMC5831799 | biostudies-literature
Project description:Preterm birth is a leading cause of long-term motor and cognitive deficits. Clinical studies suggest that some of these deficits result from disruption of cerebellar development, but the mechanisms that mediate cerebellar abnormalities in preterm infants are largely unknown. Furthermore, it remains unclear whether preterm birth and precocious exposure to the ex-utero environment directly disrupt cerebellar development or indirectly by increasing the probability of cerebellar injury, including that resulting from clinical interventions and protocols associated with the care of preterm infants. In this study, we analyzed the cerebellum of preterm pigs delivered via c-section at 91% term and raised for 10 days, until term-equivalent age. The pigs did not receive any treatments known or suspected to affect cerebellar development and had no evidence of brain damage. Term pigs sacrificed at birth were used as controls. Immunohistochemical analysis revealed that preterm birth did not affect either size or numbers of Purkinje cells or molecular layer interneurons at term-equivalent age. The number of granule cell precursors and Bergmann glial fibers, however, were reduced in preterm pigs. Preterm pigs had reduced proliferation but not differentiation of granule cells. qRT-PCR analysis of laser capture microdissected external granule cell layer showed that preterm pigs had a reduced expression of Ccnd1 (Cyclin D1), Ccnb1 (Cyclin B1), granule cell master regulatory transcription factor Atoh1, and signaling molecule Jag1. In vitro rescue experiments identified Jag1 as a central granule cell gene affected by preterm birth. Thus, preterm birth and precocious exposure to the ex-utero environment disrupt cerebellum by modulating expression of key cerebellar developmental genes, predominantly affecting development of granule precursors and Bergmann glia.
| S-EPMC6291230 | biostudies-literature
Project description:This SuperSeries is composed of the SubSeries listed below.
2018-01-01 | GSE106143 | GEO
Project description:Neocortical basal radial glia (bRG) and cerebellar Bergmann glia (BG) are basal progenitors derived from ventricular apical radial glia (aRG) that selectively lose their apical processes. bRG and BG have been implicated in the expansion and folding of the cerebrum and cerebellum, respectively. Here, we analyzed the molecular characteristics and development of bRG and BG. Transcriptomic comparison revealed striking similarity of the molecular features of bRG and BG. We found that heightened ERK signaling activity in aRG is tightly linked to the temporal formation and the relative abundance of bRG in human and mouse cortices. Forced activation of an FGF-ERK-ETV axis that is crucial to BG induction specifically induced bRG with canonical human bRG features in mice. Therefore, our data point to a common mechanism of bRG and BG generation, bearing implications to the role for these basal progenitors in the evolution of cortical folding of the cerebrum and cerebellum.
| S-EPMC5457141 | biostudies-literature