Browse
Submit Data
Databases
API
Help

Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

87 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Therapeutic potential of induced neural stem cells for spinal cord injury

ABSTRACT: The spinal cord does not spontaneously regenerate after injury and a treatment that ensures functional recovery after spinal cord injury (SCI) is still not available. Recently, fibroblasts have been directly converted into induced neural stem cells (iNSCs) following the forced expression of different combinations of transcription factors. Although directly converted iNSCs have been considered as a potentialcell source for clinical applications, their therapeutic potential has not been investigated yet. Here we show that iNSCs directly converted from mouse fibroblasts enhance the functional recovery after SCI in rats. Mouse embryonic fibroblasts (MEFs) were directly converted into iNSCs using four transcription factors (Brn4, Sox2, Klf4 and c-Myc). iNSCs showed gene expression profiles similar to cNSCs as determined by microarray analysis. MEFs were derived from C3H mouse strain embryos at embryonic day (E)13.5 after removing the head and all internal organs including the gonads and the spinal cord. 5x10^4 fibroblasts were transduced with replication-defective retroviral particles coding for Sox2, Klf4, c-Myc, and Brn4. After 48 h, the transduced fibroblasts were cultured in standard NSC medium. iNSC clusters were observed 4-5 weeks after transduction and expanded. Both MEFs and cNSCs were used as negative and positive control, respectively.

ORGANISM(S): Mus musculus

SUBMITTER: Kyungtae Lim

PROVIDER: E-GEOD-51331 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Similar Datasets

Therapeutic potential of induced neural stem cells for spinal cord injury

Project description:The spinal cord does not spontaneously regenerate after injury and a treatment that ensures functional recovery after spinal cord injury (SCI) is still not available. Recently, fibroblasts have been directly converted into induced neural stem cells (iNSCs) following the forced expression of different combinations of transcription factors. Although directly converted iNSCs have been considered as a potentialcell source for clinical applications, their therapeutic potential has not been investigated yet. Here we show that iNSCs directly converted from mouse fibroblasts enhance the functional recovery after SCI in rats. Mouse embryonic fibroblasts (MEFs) were directly converted into iNSCs using four transcription factors (Brn4, Sox2, Klf4 and c-Myc). iNSCs showed gene expression profiles similar to cNSCs as determined by microarray analysis.

2013-10-01 | GSE51331 | GEO

Generation of Integration-free Induced Neural Stem Cells from Mouse Fibroblasts

Project description:Recent studies demonstrated that fibroblasts could be converted into induced neural stem cells (iNSCs). However, the insertional mutation caused by random integration of viral vectors has been a major limitation of iNSCs for the future clinical translation. Here we show that non-viral transfection of episomal vectors encoding Brn4/Pou3f4, Sox2, Klf4, and c-Myc sufficiently generates iNSCs. The episomal vector mediated iNSCs closely resemble brain-derived NSCs as well as iNSCs generated by retrovirus in morphology, gene expression profile, epigenetic status, self-renewal capacity and both in vitro and in vivo differentiation capacity. The novel conversion protocol defined in the current study offers a method for generating integration-free iNSCs for the clinical research we developed a novel method for generating integration-free iNSCs. We demonstrated that oriP/EBNA1-based episomal vectors could generate iNSCs by single transfection

2015-03-27 | E-GEOD-67319 | biostudies-arrayexpress

Generation of Integration-free Induced Neural Stem Cells from Mouse Fibroblasts

2015-03-27 | GSE67319 | GEO

Genome-wide expression analysis of human fibroblasts and converted neurons

2014-01-16 | GSE45954 | GEO

Genome-wide expression analysis of human fibroblasts and converted neurons

Project description:Human fibroblasts can be directly converted into cholinergic neurons by Neurogenin 2 (Neurog2 or NGN2) under the treatments of small molecules. Genome-wide analysis of gene expression was performed to examine the similarity of converted neurons to samples from human brain or spinal cord. Total RNA obtained from isolated human fetal lung fibroblasts or converted neurons at 21 days. Commercially available total RNAs from adult human brains and spinal cords were used as controls.

2014-01-16 | E-GEOD-45954 | biostudies-arrayexpress

Fusion of reprogramming factors alters trajectory of somatic lineage conversion

Project description:Simultaneous expression of Oct4, Klf4, Sox2, and cMyc induces pluripotency in somatic cells (iPSCs). Replacing Oct4 with the neuro-specific factor Brn4 leads to the transdifferentiation of fibroblasts into induced neural stem cells (iNSCs). However, Brn4 was recently found to induce a transient acquisition of pluripotency before establishing the neural fate. We employed genetic lineage tracing and found that induction of iNSCs with individual vectors leads to direct lineage conversion. In contrast, polycistronic expression produces a Brn4-Klf4 fusion protein that enables the induction of pluripotency. Our study demonstrates that a combination of pluripotency and tissue-specific factors allows for direct somatic cell transdifferentiation, bypassing the acquisition of a pluripotent state. This result has major implications for lineage conversion technologies, which hold potential for providing a safer alternative to iPSCs for clinical application both in vitro and in vivo.

2019-01-29 | GSE125740 | GEO

Lineage reprogramming of adult mouse liver cells and B-lymphocytes to neural stem-like cells using defined factors [expression array]

Project description:The overexpression of transcription factors Oct4, Sox2, Klf4, and c-Myc reprograms a somatic nucleus to one that is transcriptionally and epigenetically indistinguishable from an embryonic stem (ES) cell. However, it is still unclear if transcription factors can completely convert the nucleus of a differentiated cell into that of a distantly related cell type such that it maintains complete transcriptional and epigenetic reprogramming in the absence of exogenous factor expression. To test this idea, we screened a library of doxycycline-inducible vectors encoding neural stem cell (NSC)-expressed genes and found that stable, self-maintaining NSC-like cells could be induced under defined growth conditions after transduction of transcription factors. These induced NSCs (iNSCs) were characterized in the absence of exogenous factor induction and were shown to be transcriptionally, epigenetically, and functionally similar to endogenous embryonic cortical NSCs. Importantly, iNSCs could be generated from multiple adult cell types including liver cells and B-cells with genetic rearrangements. Our results show that self-maintaining proliferative neural cells can be induced from non-ectodermal cells by expressing specific combinations of transcription factors. Expression analysis was performed on mouse embryonic fibroblasts (MEFs), primary-derived neural stem cells (NSCs) and induced neural stem cells (iNSCs).

2014-09-16 | E-GEOD-61433 | biostudies-arrayexpress

Enhanced Direct Conversion into Hepatocyte-like Cells by Accelerated Sequential Epigenetic Events using Additional Stem Cell Factors

Project description:Recent studies have shown that defined sets of transcription factors could directly convert fibroblasts into induced hepatocytes (iHeps). However, the underlying mechanism of direct conversion process toward a hepatic lineage is largely unknown. Here, we report that the direct conversion kinetics from fibroblasts into iHeps throughout screening multiple additional factors that potentially rescue the delayed kinetics of MET and hepatic program. Mouse embryonic fibroblasts (MEFs) were efficiently converted into iHeps in the presence of c-Myc and Klf4 (CK), the activators for MET process, with the previously defined sets of hepatic transcription factors, resulting in remarkably improved generation of iHeps. Furthermore, in the presence of CK, Hnf4? alone could convert fibroblasts into iHeps within 5 days with a relatively higher efficiency. Cells transduced with different combinations of factors were cultured in standard Hep medium. Epithelial colonies were observed within 5 days with much higher numbers in the presence of additional factor, c-Myc and Klf4, compared to control group, indicating the number of epithelial colony was dramatically increased in the presence of additional stem cell factors

2013-12-03 | E-GEOD-52566 | biostudies-arrayexpress

Generation of induced motor neurons (iMNs) from human fibroblasts facilitates locomotor recovery after spinal cord injury

Project description:Generation of autologous motor neurons holds a great promise for cell replacement therapy to treat spinal cord injury (SCI). Direct conversion allows the generation of target cell types from somatic cells, however, current protocols are not practicable for therapeutic purposes since converted cells are post-mitotic populations that are not readily scalable. Therefore, therapeutic effects of directly converted neurons have not been elucidated yet. Here, we show that human fibroblasts can be converted into induced motor neurons (iMNs) by sequential induction of OCT4 and LHX3. Our strategy enables large production of pure iMNs through self-renewing iMN-intermediate cell stage which is distinct from neural progenitors. iMNs exhibited the hallmarks of spinal motor neurons including cellular morphology, marker expression, electrophysiological property, synaptic activity, and formation of neuromuscular junctions. Remarkably, transplantation of iMNs showed therapeutic effects, promoting locomotor functional recovery in SCI model. Taken together, our advanced strategy will provide tools to acquire sufficient iMNs that may represent a promising cell source for personalized cell therapy.

2020-06-29 | GSE149664 | GEO

Generation of integration-free induced hepatocytes from mouse fibroblasts

Project description:Previous studies demonstrated that hepatocyte-specific transcription factors could directly convert fibroblasts into functional hepatocytes-like cells, namely induced hepatocytes (iHeps) using viral systems. However, viral integration into host genome causes insertional mutation and risk of tumorigenecity. we showed iHeps could be generated from MEFs using the integration-free system. They were expandable in vitro and showed hepatic features, similar to primary hepatocytes. iHeps_G4H1F3 transfected (Episomal vectors) and iHeps_G4H1F3 transduced (pMXs) were duplicate, respectively. MEFs and primary hepatocytes were used as negative and positive controls, respectively.

2015-03-27 | E-GEOD-67362 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data