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RNAseq on Id4-GFP bright + med germ cells (~SSC) at 10dpp

ABSTRACT: To allow identification of differentially expressed genes in Dnmt3A mutant and wildtype Id4-GFPbright+med cells (~SSC) at 10dpp

ORGANISM(S): Mus musculus

PROVIDER: GSE162585 | GEO | 2022/01/25

REPOSITORIES: GEO

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RNAseq on Id4-GFP bright + med germ cells (~SSC) at 10dpp

Project description:RNAseq on Id4-GFP bright + med germ cells (~SSC) at 10dpp

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Cut&Run on Id4-GFP bright + med germ cells (~SSC) at 10dpp for H3K27me3, H3K27ac and H3K9me3

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RNA sequencing of ID4-GFP Bright and ID4-GFP Dim spermatogonia from postnatal day 8 transgenic Id4-Gfp (LT11) mouse pups

Project description:Spermatogonia expressing the highest levels of ID4 (ID4-GFP Bright) represent a population highly enriched for spermatogonial stem cells (SSC) while those expressing lower levels (ID4-GFP Dim) are the putative immediate progenitors. Comparing the transcriptome of these populations can provide insight into the SSC to progenitor transition.

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Cut&Run on Id4-GFP bright + med germ cells (~SSC) at 10dpp for H3K27me3, H3K27ac and H3K9me3

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RNA sequencing of ID4-GFP Bright and ID4-GFP Dim spermatogonia from postnatal day 8 transgenic Id4-Gfp (LT11) mouse pups and ID4-GFP+ spermatogonia from ID4 overexpression mouse model and control

Project description:Mice that constitutively overexpress ID4 in germ cells have impaired spermatogenic lineage development. The transcriptome of ID4-GFP+ spermatogonia from testes of ID4 overexpression animals was compared to the ID4-GFP+ population from controls

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Expression data from CD19-positive splenic B cells isolated from 1-month old ID4+/-TCL1-tg and ID4+/+TCL1-tg mice

Project description:The function of ID4 in CLL development was studied in vivo using TCL1 transgenic mouse model that develop leukemia similar to human CLL. TCL1 mice with ID4 single knockout gene have accelerated CLL progression. Results from the animal study suggest ID4 as a tumor suppressor gene that might regulate cell proliferation and apoptosis in B lymphocytes. Gene expression in CD19-positive splenic B cells collected from 1-month old ID4+/-TCL1-tg and ID4+/+TCL1-tg mice was compared by microarray, the goal is to find ID4-regulated genes involved in CLL development.

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10x Genomics single-cell RNA-seq of isolated Adult ID4-EGFP-bright mouse spermatogonia treated with Rapamycin

Project description:To reveal distinct transcriptome changes among ID4-EGFP-bright adult mouse spermatogonia associated with mTORC1 activity, single-cell transcriptomes were generated from GFP-bright/CD9-bright spermatogonia from adult mice in three groups: control (untreated), 2 days of Rapamycin treatment (Rapamycin) and 2 days Rapamycin plus 1 day washout (Rapamycin_Release). Based on transplantation studies performed previously, ID4-EGFPbright cells are highly enriched for SSCs. We used the 10x Genomics Chromium to perform single-cell RNA-seq.

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ID4 function antagonizes OLIG1 and OLIG2 to suppressive aggressive glioma

Project description:The basic helix-loop-helix proteins Olig1 and Olig2 are expressed in high grade, aggressive human glioblastoma multiformes (GBMs). Here we investigated genetic mechanisms regulating Olig1/2 function during gliomagenesis. Although Olig2 function is necessary for early-aggressive tumor formation in a genetically relevant model of classic GBMs with intact p53 function, late-onset gliomas do eventually form. Using an unbiased approach, we identified Id4, encoding a negative HLH protein, as a gene target potently repressed by Olig2 in glioma progenitors. Although Id4 is thought to antagonize proneural genes involved in differentiation, we report a paradoxical role for Id4 in glioma. Genetic deletion of Id4 converts Olig2-/- gliomas to the early-aggressive form, and conversely, overexpression of Id4 inhibits intact Olig2 and prevents even late-onset tumors. Olig1 overexpression is sufficient for gliomagenesis in an Id4-dependent manner. Together, these findings indicate that gliomagenic factors Olig1 and Olig2 are opposed by Id4 function, which acts as tumor suppressor in p53-intact gliomas.

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Id4 maintains quiescence of adult hippocampal stem cells

Project description:Quiescence is essential for the long term maintenance of adult stem cells and tissue homeostasis. However, how stem cells maintain quiescence is still poorly understood. Here we show that stem cells in the dentate gyrus of the adult hippocampus actively transcribe the proactivation factor Ascl1 regardless of their activation state. We found that the inhibitor of DNA binding protein Id4 suppresses Ascl1 activity in neural stem cell cultures. Id4 sequesters Ascl1 heterodimerisation partner, promoting the degradation of Ascl1 protein and neural stem cell quiescence. Accordingly, elimination of Id4 from stem cells in the adult hippocampus results in abnormal accumulation of Ascl1 protein and premature stem cell activation. We also found that multiple signalling pathways converge on the regulation of Id4 to control the activity of hippocampal stem cells. Id4 therefore maintains quiescence of adult neural stem cells, in sharp contrast with its role of promoting the proliferation of embryonic neural progenitors.

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