Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA324773 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR3647180.fastq.gz | Fastqsanger.gz | |||
| SRR3647181.fastq.gz | Fastqsanger.gz | |||
| SRR3647182.fastq.gz | Fastqsanger.gz | |||
| SRR3647183.fastq.gz | Fastqsanger.gz | |||
| SRR3647184.fastq.gz | Fastqsanger.gz |
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Project description:Neural stem cells (NSCs) can be isolated from different regions of the central nervous system. There has been controversy whether regional differences amongst stem and progenitor cells are cell intrinsic and whether these differences are maintained during expansion in culture. The identification of inherent regional differences has important implications for the use of these cells in neural repair. Here, we compared neural stem cells derived from the spinal cord and embryonic cortex. We found that while cultured cortical and spinal cord derived neural stem cells respond similarly to mitogens and are equally neuronogenic, they retain and maintain through multiple passages gene expression patterns indicative of the region from which they were isolated. Further microarray analysis identified 229 genes that were differentially expressed between cortical and spinal cord derived neurospheres. Keywords: stem cell comparison
2009-02-15 | GSE9433 | GEO
Project description:Neural stem cells (NSCs) can be isolated from different regions of the central nervous system. There has been controversy whether regional differences amongst stem and progenitor cells are cell intrinsic and whether these differences are maintained during expansion in culture. The identification of inherent regional differences has important implications for the use of these cells in neural repair. Here, we compared neural stem cells derived from the spinal cord and embryonic cortex. We found that while cultured cortical and spinal cord derived neural stem cells respond similarly to mitogens and are equally neuronogenic, they retain and maintain through multiple passages gene expression patterns indicative of the region from which they were isolated. Further microarray analysis identified 229 genes that were differentially expressed between cortical and spinal cord derived neurospheres. Experiment Overall Design: Cortex and and spinal cords were isolated from embryonic day 14 cd1 mice and cultured ad neurospheres for 2 passages in EGF and bFGF. 3 independent sets of cultures serve as biological replicates with a dye flip control for each hybridization, for a total of 6 arrays.
2009-02-20 | E-GEOD-9433 | biostudies-arrayexpress
Project description:Transected spinal cord injury (SCI) results in significant structural disruption of the spinal cord. The reconstruction of neural pathways following SCI faces several key challenges, including inadequate endogenous neural stem cells (NSCs) and poor neurogenesis in natural repair process, and concerns related to the long-term survival of neurons following exogenous transplantation. In the current study, we report an oligonucleotide aptamer drug (Apt19S) which is first proven to recruit endogenous NSCs to the site of injury following SCI, and therefore develop a bionic spinal cord scaffold that can sustainedly release Apt19S and neurotrophin-3 (NT-3) to provide the neurogenic niche with the necessary mechanical properties and support for in situ spinal cord repair. The bionic scaffold successfully recruited a significant number of endogenous NSCs in vivo and established a neurogenic niche that was abundant in NT-3, thereby promoting neuronal differentiation and the formation of neuronal networks Regenerated nerve fibers including 5-hydroxytryptamine-positive nerve fibers and corticospinal tract grew robustly into the injury site and generated synaptic connections with the newborn neurons. Collectively, our findings indicate that our aptamer-based bionic spinal cord scaffold elicits a robust neurogenesis process in situ, breaking the limitations imposed by poor self-repair ability in the adult spinal cord.
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Project description:Comparison of genomic data from neural progenitor cells derived from mouse embryonic stem cells under different experimetnal conditions in vitro and invivo. We conducted genome-wide RNA sequencing of immunoprecipitated specific ribosome-associated mRNA using RiboTag methods from: (i) mouse embryonic stem cell (ESC), (ii) derived neural progenitor cells, (iii) differentiated neural progenitor cells (in vitro), (iv) grafted neural progenitor cells (recovered from different in vivo tissue enivornments - healthy spinal cord, spinal cord injury lesions) and (v) host astrocytes using GFAp-Cre RiboTag mice.
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Project description:Human astrocytes have reported to reprogram into neurons, but they have yet to be induced to three-dimensional (3D) neural tissue for neural organogenesis. Here, we demonstrate a remarkable strategy for 3D organoid generation by direct reprogramming human astrocytes. By combining overexpression OCT4, suppression p53 and small molecules CHIR99021, SB431542, RepSox and Y27632, termed as Op53-CSBRY, we successfully reprogramed human astrocytes into neural ectodermal cells and further induced human 3D-brain organoid. Those organoids can be finally induced into spinal cord organoids by activating FGF, SHH and BMP signaling. The grafts of Human astrocyte derived spinal cord organoids (hADSC-Organs) can survived, differentiated into spinal cord neurons, migrated long distance, formed synaptic connectivity with host neurons, bridged complete injury spinal cord tissue in mice. This method indicates that human astrocytes could be directly triggered neural organogenesis, and may hold a great promising to support local astrocytes in situ organogenesis after brain damages, such as stroke and spinal cord injury.
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Project description:The spinal cord possesses precise neural circuitry to transmit messages between the brain and body. Detailed transcriptomic profiling of the developing human spinal cord has not been reported. Here, we performed single cell RNA sequencing of developing human spinal cord cells and compared these data with similar mouse spinal cord RNA sequencing datasets. The differentiation tendency of proliferative neural progenitor cells changed from neuronal to glial cells at gestational week (GW) 8 and we identified a diverse set of excitatory, inhibitory and motor neuron cell types. Human ventral neuronal differentiation occurred earlier than GW7, while DI4/5 interneurons are born between GW7–11. We identified glial cell molecular diversity and revealed that ependymal cell specification occurs before birth. We also demonstrate differences between human and mouse spinal cord, including unique cell subtypes, gene expression, neurotransmitter receptors, and glial differentiation timing. Our results offer insight into human spinal cord development.
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Project description:MicroRNAs (miRNAs) have been implicated in regulating multiple processes during brain development in various species. However, the function of miRNAs in human brain development remains largely unexplored. Here, we provide a comprehensive analysis of miRNA expression of regionalized neural progenitor cells derived from human embryonic stem cells and human fetal brain. We found that several miRNAs displaying both age-specific and region-specific expression patterns. Among these miRNAs we identified miR-10 to be specifically expressed in the human hindbrain and spinal cord, while absent from rostral regions. Gain-of-function experiments further demonstrated that miR-10 alone could drive caudalization of human neural progenitors cells. Together, these data confirms a role for miRNAs in establishing different human neural progenitor populations. This data set also provides a comprehensive resource for future studies investigating the functional role of different miRNAs in human brain development MicroRNA sequencing of 34 samples from human embryonic stem cells and human fetal brains.
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