Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA329600 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR3929990_1.fastq.gz | Fastqsanger.gz | |||
| SRR3929990_2.fastq.gz | Fastqsanger.gz | |||
| SRR3929985_1.fastq.gz | Fastqsanger.gz | |||
| SRR3929985_2.fastq.gz | Fastqsanger.gz | |||
| SRR3929986_1.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 5 of 12 |
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Project description:In order to understand if early epigenetic mechanisms instruct the long-term behaviour of neural stem cells (NSCs) and their progeny, we examined the protein Uhrf1 as it is highly expressed in NSCs of the developing brain and rapidly downregulated upon differentiation. Conditional deletion of Uhrf1 in the developing cerebral cortex resulted in rather normal proliferation and neurogenesis but severe postnatal neurodegeneration. During development, deletion of Uhrf1 resulted in global DNA hypomethylation with a strong activation of the IAP family of endogenous retroviral elements, accompanied by an increase in hydroxy methyl cytosine. Downregulation of Tet enzymes rescued the IAP activation in Uhrf1 cKO cells, suggesting an antagonistic interplay between Uhrf1 and Tet on IAP regulation. As IAP upregulation persists into postnatal stages in the conditional Uhrf1 KO mice, our data show the lack of means to repress IAPs in differentiating neurons that normally never express Uhrf1. The high load of viral proteins and other transcriptional dysregulation ultimately lead to extensive postnatal neurodegeneration. Taken together, these data show that early developmental NSC factors can have long-term effects in neuronal differentiation and survival. Moreover, it highlights how specific the consequences of widespread changes in DNA methylation are for certain classes of retroviral elements.
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Project description:In order to understand if early epigenetic mechanisms instruct the long-term behaviour of neural stem cells (NSCs) and their progeny, we examined the protein Uhrf1 as it is highly expressed in NSCs of the developing brain and rapidly downregulated upon differentiation. Conditional deletion of Uhrf1 in the developing cerebral cortex resulted in rather normal proliferation and neurogenesis but severe postnatal neurodegeneration. During development, deletion of Uhrf1 resulted in global DNA hypomethylation with a strong activation of the IAP family of endogenous retroviral elements, accompanied by an increase in hydroxy methyl cytosine. Downregulation of Tet enzymes rescued the IAP activation in Uhrf1 cKO cells, suggesting an antagonistic interplay between Uhrf1 and Tet on IAP regulation. As IAP upregulation persists into postnatal stages in the conditional Uhrf1 KO mice, our data show the lack of means to repress IAPs in differentiating neurons that normally never express Uhrf1. The high load of viral proteins and other transcriptional dysregulation ultimately lead to extensive postnatal neurodegeneration. Taken together, these data show that early developmental NSC factors can have long-term effects in neuronal differentiation and survival. Moreover, it highlights how specific the consequences of widespread changes in DNA methylation are for certain classes of retroviral elements.
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Project description:In order to understand if early epigenetic mechanisms instruct the long-term behaviour of neural stem cells (NSCs) and their progeny, we examined the protein Uhrf1 as it is highly expressed in NSCs of the developing brain and rapidly downregulated upon differentiation. Conditional deletion of Uhrf1 in the developing cerebral cortex resulted in rather normal proliferation and neurogenesis but severe postnatal neurodegeneration. During development, deletion of Uhrf1 resulted in global DNA hypomethylation with a strong activation of the IAP family of endogenous retroviral elements, accompanied by an increase in hydroxy methyl cytosine. Downregulation of Tet enzymes rescued the IAP activation in Uhrf1 cKO cells, suggesting an antagonistic interplay between Uhrf1 and Tet on IAP regulation. As IAP upregulation persists into postnatal stages in the conditional Uhrf1 KO mice, our data show the lack of means to repress IAPs in differentiating neurons that normally never express Uhrf1. The high load of viral proteins and other transcriptional dysregulation ultimately lead to extensive postnatal neurodegeneration. Taken together, these data show that early developmental NSC factors can have long-term effects in neuronal differentiation and survival. Moreover, it highlights how specific the consequences of widespread changes in DNA methylation are for certain classes of retroviral elements.
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