Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA305612 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR2984760.fastq.gz | Fastqsanger.gz | |||
| SRR2984780.fastq.gz | Fastqsanger.gz | |||
| SRR2984761.fastq.gz | Fastqsanger.gz | |||
| SRR2984771.fastq.gz | Fastqsanger.gz | |||
| SRR2984773.fastq.gz | Fastqsanger.gz |
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Project description:De novo mutations in CHD8 are strongly associated with autism spectrum disorder (ASD), however the underlying mechanisms remain elusive. Here we report that Chd8 knockdown during cortical development results in defective neural progenitor proliferation and differentiation that ultimately manifests in abnormal neuronal morphology and behaviors in adult mice. Transcriptome analysis revealed that on the one hand Chd8 stimulates the transcription of cell cycle genes, while on the other it precludes the induction of neural specific genes by regulating the expression of PRC2 complex components. Furthermore, knockdown of Chd8 disrupts the expression of key transducers of Wnt signaling, and enhancing Wnt signaling rescues the transcriptional and behavioral deficits caused by Chd8 knockdown. We propose that these roles of Chd8 and the dynamics of its expression during development help negotiate the fine balance between neural progenitor proliferation and differentiation. Together, these observations provide new insights into the etiology of ASD.
2016-09-10 | GSE72442 | GEO
Project description:Periodontal ligament (PDL) stem-like cells (PDLSCs) are considered to be promising for the regeneration of periodontium because they demonstrate multipotency, high proliferative capacity, and potential to regenerate bone, cementum, and PDL tissue. However, the transplantation of autologous PDLSCs is restricted by limited availability and the need for tooth extraction to isolate these cells. PDLSCs are derived from neural crest cells (NCs) in early vertebrate development and NCs persist in adult PDL tissue. Therefore, we devised to promote the regeneration of periodontium by activating NCs to differentiate into PDLSCs and increasing their total number. SK-N-SH cells cultured on the extracellular matrix derived of human PDL cells (SK-PDLSCs) strongly expressed PDL-related marker genes and highly differentiated into mesenchymal lineage cells compared to untreated SK-N-SH cells. Expression levels of various hyaluronic acid (HA)-related genes were upregulated in induced pluripotent stem cells (iPSCs)-derived PDLSCs and SK-PDLSCs compared to iPSCs-derived NCs and SK-N-SH cells, respectively. Magnetic-activated cell sorting-assisted CD44-positive enrichment population of SK-N-SH cells showed higher expression of PDL-related marker genes after SK-PDLSCs induction than the CD44-negative population. Knockdown of CD44 in SK-N-SH cells significantly inhibited their ability to differentiate into SK-PDLSCs, while lower molecular HA (LHA) induction enhanced SK-PDLSC differentiation. LHA-containing electrospun nanofibrous membranes also promoted their SK-PDLSC differentiation. Our findings suggest that SK-N-SH cells are applied as a new model to induce the differentiation of NCs into PDLSCs. The LHA-CD44 relation is important for the differentiation of NCs into PDLSCs. LHA-containing electrospun nanofibrous membranes would promote the regeneration of periodontium by activating NCs in PDL tissue and increasing the total number of PDLSCs.
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Project description:Mutations in ATP-dependent chromatin remodeler CHD8 cause one of the most frequent monogenetic forms of autism and also associate with brain overgrowth. Nevertheless, activities of CHD8 in autism-relevant cell types are still poorly understood. Here we purify the CHD8 protein from human neural stem cells and determine its interaction partners by mass spectrometry. We identify the TRRAP-complex, a coactivator of MYC and E2F transcription factors, as a prominent CHD8 interaction partner. CHD8 colocalizes genome-wide with TRRAP and TRRAP and CHD8 bind together to MYC- and E2F-target gene promoters in human neural stem cells. Acute depletion of CHD8 or TRRAP from human neural stem cells shows down-regulation of MYC- and E2F-target genes as most prominent gene-regulatory events. MYC and E2F factors are established oncogenes known to regulate cell growth. Our results link CHD8 to TRRAP in facilitating regulation of MYC- and E2F-target genes in neural stem cells.
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2014-10-07 | E-GEOD-61487 | biostudies-arrayexpress
Project description:Analysis of the effect of shRNA-mediated knockdown of TRPM7 on gene expression levels in SH-SY5Y and SH-EP2 human neuroblastoma cells. Results were used for the identification of neural-crest-associated transcription factors that were affected by TRPM7 knockdown. Total RNA isolated from SH-EP2 and SH-SY5Y human neuroblastoma cells transduced with a scrambled shRNA (control) or TRPM7 shRNA, experiment performed in duplicate.
2014-12-10 | E-GEOD-64000 | biostudies-arrayexpress
Project description:To understand the function of CHD8 in human ESC and neural differentiation, we generated the CHD8 knockout human ESCs and characterize the effect of loss-of-function of CHD8 on pluripotency maintenance and neuroectoderm determination by utilizing an efficient neuroectoderm differentiation protocol. Samples from hESC, CHD8KO_hESC and their derived-neural progenitor cells (hNPC) were collected for high-throughput sequencing with at least two replicates for each sample. Differentially expressed genes analysis showed loss of CHD8 affect the genes in ESC and NPC.
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