Similar Datasets
Project description:In order to investigate how transcription factor dose impacts B-lymphocyte development, we generated mice carrying transheterozygous mutations in the Pax5 and Ebf1 genes. While combined reduction of Pax5 and Ebf1 dose had minimal impact on the development of the earliest CD19+ progenitors, these cells displayed an increased T-cell potential in vivo and in vitro. Alteration in lineage fate depended on a Notch1 mediated conversion process while no signs of de-differentiation could be detected. The differences in functional response to Notch signaling in Wt and Pax5+/-Ebf1+/- pro-B cells was reflected in the transcriptional response because even though cells of both genotypes responded by the generation of intracellular Notch1 and activation of a set of target genes, only the Pax5+/-Ebf1+/- pro-B cells down-regulated genes central for the preservation of stable B-cell identity. This report stresses the importance of transcription factor dose in lymphocyte development and suggests that Pax5 and Ebf1 collaborate to modulate the transcriptional response to Notch signaling after the generation of activated intracellular Notch1. This provides an insight to how transcription factors like Ebf1 and Pax5 preserve cellular identity during differentiation. EBF-1 ChIP-seq: Cultivated CD43+IgM- cells (ProB) cells from Wt, EBF-1 +/-, PAX-5 +/- and EBF-1 +/- PAX-5 +/- (TH) were assessed for EBF-1 binding by ChIP-seq. Replicate Ebf1 ChIP-seq runs on each genotype (Wt, TH, Ebf1+/- and Pax5+/-) and corresponding inputs were pooled into one dataset and analyzed as one combined sample per genotype. RNA-seq no treatment: Briefly, ProB-cells from C57BL/6J Ebf1+/-Pax5+/- (n=4), WT (n=4), Ebf1+/- (n=2) and Pax5+/- (n=2) were sorted and RNA extracted with Qiagen RNeasy Micro Kit. RNA was sent to UCLA Microarray Core for library preparation and were subsequently for 50 cycles of HiSeq 2000 SBS sequencing generating 20-30 million reads/sample. Data analysis was performed with Arraystar® (DNASTAR)). RNA-seq 1 day on OP9DL1 and OP9: In short, in vitro expanded ProB-cells from C57BL/6J Ebf1+/-Pax5+/- (n=4) and WT (n=4) were exposed either on OP9 or OP9-DL1 stromal cells for 24 hours and RNA extracted with Qiagen RNeasy Micro Kit. Due to low reads, two Wt and Ebf1+/-Pax5+/- were sequenced twice. Libraries were constructed using Nugen's Ovation Ultralow Library systems and were subsequently for 50 cycles of NextSeq500 sequencing generating 20-30 million reads/sample. Data analysis was performed with Arraystar® (DNASTAR)).
2015-05-27 | E-GEOD-69227 | biostudies-arrayexpress
Project description:Purpose: Deficiency of Zbtb1 leads to the generation of myeloid cells from lymphoid progenitors when cultured in conditions that do not support myeloid development. We therefore analyzed how was the transcriptional signature altered by Zbtb1 deficiency in lymphoid progenitors ex vivo and after induction of a T-cell developmental program by co-culture with OP9-DL1 stroma cells.
2017-07-28 | GSE84961 | GEO
Project description:The IRF8-dependent subset of classical dendritic cells (cDC), termed cDC1, is important for cross-priming cytotoxic T cell responses against pathogens and tumors. Culture of hematopoietic progenitors with DC growth factor Flt3 ligand (Flt3L) yields very few cDC1 (in humans) or only immature "cDC1-like" cells (in the mouse). We report that OP9 stromal cells expressing Notch ligand Delta-like 1 (OP9-DL1) optimize Flt3L-driven development of cDC1 from murine immortalized progenitors and primary bone marrow cells. Co-culture with OP9-DL1 induced IRF8-dependent cDC1 with the phenotype (CD103+ Dec205+ CD8α+) and expression profile resembling ex vivo cDC1. OP9-DL1-induced cDC1 showed preferential migration towards Ccr7 ligands in vitro and superior T cell cross-priming and antitumor vaccination in vivo. Co-culture with OP9-DL1 also greatly increased the yield of IRF8-dependent CD141+ cDC1 from human bone marrow progenitors cultured with Flt3L. Thus, Notch signaling optimizes cDC generation in vitro and yields authentic cDC1 for functional studies and therapeutic applications.
2018-06-05 | GSE110577 | GEO
Project description:To assess the effect of over-expression of Delta-like 1 on OP9 cells on gene expression in terms of Notch signaling and adhesion molecules, gene expressions of OP9, OP9-GFP (carrying GFP gene) and OP9-DL1 (carrying GFP and DL1 gene) cells (Immunity 2002;17:749-756) were analyzed.
2010-10-01 | GSE22659 | GEO
Project description:To assess the effect of over-expression of Delta-like 1 on OP9 cells on gene expression in terms of Notch signaling and adhesion molecules, gene expressions of OP9, OP9-GFP (carrying GFP gene) and OP9-DL1 (carrying GFP and DL1 gene) cells (Immunity 2002;17:749-756) were analyzed. Gene expression of OP9, OP9-GFP and OP9-DL1 were compared.
2010-10-01 | E-GEOD-22659 | biostudies-arrayexpress
Project description:We discovered that vitamin C (ascorbic acid) is required for differentiation of mouse bone marrow-derived progenitor cells in T cell cultures based on OP9-DL1 stromal cells. This microarray dataset evaluates differential expression of genes in OP9-DL1 stromal cells as well as in lymphocytes developing in the cultures when a stabilized form of ascorbic acid (l-ascorbic acid 2-phosphate; pAsc) is added. Cultures were maintained in the absence of pAsc for 13 days, at which time 800 micromolar pAsc was added. Cells were harvested after 24 and 72 hours (24 hours only in the case of OP9-DL1 cells) and solubilized in Trizol.
2011-08-24 | GSE31596 | GEO
Project description:To study the function of C-terminus domain of EBF1, a gain-of function microarray analysis was performed by transducing Empty, Ebf1wt and Ebf1DC expressing vectors into Ebf1-/- progenitor cells.
2016-05-09 | GSE78842 | GEO
Project description:To study the function of EBF1-H240 residue, genome-wide EBF1 ChIP was performed in A-MuLV transformed pro-B (Ebf1fl/fl;RERTCre) cells transduced with Ebf1wt and Ebf1H240A expressing vectors.
2016-11-21 | GSE87636 | GEO
Project description:In order to investigate how transcription factor dose impacts B-lymphocyte development, we generated mice carrying transheterozygous mutations in the Pax5 and Ebf1 genes. While combined reduction of Pax5 and Ebf1 dose had minimal impact on the development of the earliest CD19+ progenitors, these cells displayed an increased T-cell potential in vivo and in vitro. Alteration in lineage fate depended on a Notch1 mediated conversion process while no signs of de-differentiation could be detected. The differences in functional response to Notch signaling in Wt and Pax5+/-Ebf1+/- pro-B cells was reflected in the transcriptional response because even though cells of both genotypes responded by the generation of intracellular Notch1 and activation of a set of target genes, only the Pax5+/-Ebf1+/- pro-B cells down-regulated genes central for the preservation of stable B-cell identity. This report stresses the importance of transcription factor dose in lymphocyte development and suggests that Pax5 and Ebf1 collaborate to modulate the transcriptional response to Notch signaling after the generation of activated intracellular Notch1. This provides an insight to how transcription factors like Ebf1 and Pax5 preserve cellular identity during differentiation.
2015-05-27 | GSE69227 | GEO
Project description:We discovered that vitamin C (ascorbic acid) is required for differentiation of mouse bone marrow-derived progenitor cells in T cell cultures based on OP9-DL1 stromal cells. This microarray dataset evaluates differential expression of genes in OP9-DL1 stromal cells as well as in lymphocytes developing in the cultures when a stabilized form of ascorbic acid (l-ascorbic acid 2-phosphate; pAsc) is added. Cultures were maintained in the absence of pAsc for 13 days, at which time 800 micromolar pAsc was added. Cells were harvested after 24 and 72 hours (24 hours only in the case of OP9-DL1 cells) and solubilized in Trizol. Two-condition experiment, differentiating T lymphoid cells with or without pAsc, 2 timepoints, OP9-DL1 cells with or without pAsc, 1 timepoint, no technical replicates
2011-08-23 | E-GEOD-31596 | biostudies-arrayexpress