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Transcriptional changes and microRNA expression profiles during NeuroD1-mediated astrocyte-to-neuron conversion

ABSTRACT: Transcriptional changes and microRNA expression profiles during NeuroD1-mediated astrocyte-to-neuron conversion

PROVIDER: PRJNA887010 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21800133.fastq.gz	Fastqsanger.gz
	SRR21800134.fastq.gz	Fastqsanger.gz
	SRR21800135.fastq.gz	Fastqsanger.gz
	SRR21800136.fastq.gz	Fastqsanger.gz
	SRR21800137.fastq.gz	Fastqsanger.gz

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Transcriptional changes and microRNA expression profiles during NeuroD1-mediated astrocyte-to-neuron conversion

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A NeuroD1 AAV-Based Gene Therapy For Functional Brain Repair After Ischemic Injury Through In Vivo Astrocyte-To-Neuron Conversion

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Project description:Astrocyte-to-neuron conversion has developed into a promising avenue for neuronal replacement therapy. Neurons depend critically on mitochondria function and often die by ferroptosis during the conversion process. Here we examined the extent of adequate mitochondrial reprogramming by morphology and proteome analysis. While mitochondria profoundly changed their morphology during Neurogenin2 (Neurog2) – or Achaete-scute homolog 1 (Ascl1)-mediated astrocyte-to-neuron reprogramming, we found neuron-specific mitochondrial proteins, here identified in a comprehensive proteome analysis of isolated mitochondria from primary neurons and astrocytes, to be only partially and at late stages regulated during the process. To improve this, we used dCas9 technology to induce neuron-specific mitochondrial proteins early during reprogramming. This resulted not only in increased conversion efficiency, but also in faster neuronal generation. Taken together, reprogramming mitochondria in a cell type-specific manner has powerful effects on astrocyte-to-neuron conversion, suggesting mitochondria to be a driving force in this process.

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RNA-seq analysis of gene expression in cells during Ascl1 mediated astrocyte-to-neuron conversion.

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Single cell RNA-sequencing analysis of astrocyte-to-neuron conversion in 5xFAD mouse hippocampus

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Rat Astrocyte-Neuron Co-cultures versus purified co-cultured Astrocytes versus Astrocyte alone

Project description:Profiling of transcriptional changes in rat astrocytes when co-cultured with neurons: comparison of astrocytes cultured alone with astrocytes co-cultured with mouse hippocampal neurons. Co-cultured astrocytes are isolated using cold jet, a novel tool for these neuron-glia cultures. Over the last decade, the importance of astrocyte-neuron communication in neuronal development and synaptic plasticity has become increasingly clear. Since neuron-astrocyte interactions represent highly dynamic and reciprocal processes, we hypothesized that at least part of the involved astrocyte genes may be regulated as a consequence of their interactions with maturing neurons. In order to identify such neuron-induced astrocyte genes in vitro, we tested the effectiveness of the ‘cold jet’, a new method for separation of neurons from co-cultured astrocytes. The cold jet method is performed under ice-cold conditions and avoids protease-mediated isolation of astrocytes or time-consuming centrifugation, yielding intact astrocyte mRNA with approximately 90% of neuronal RNA removed. Using this method, we executed genome-wide profiling in which RNA derived from astrocyte-only cultures was compared with astrocyte RNA derived from differentiating neuron-astrocyte co-cultures. Data analysis revealed changes in expression of a large number of mRNAs and biological processes, including novel findings. Thus, cold jet is an efficient method to separate astrocytes from neurons in co-culture, and in this study reveals that neurons induce robust gene-expression changes in co-cultured astrocytes.

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Project description:RNA-seq analysis of gene expression in cells during Ascl1 mediated astrocyte-to-neuron conversion.

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