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Gene expression analysis of B cell differentiation using B cell blasts and developmentally arrested plasmablasts

ABSTRACT: In vitro generated blasts from B cells deficient in prdm1 were isolated according to whether they were attempting to express Blimp1, reported by a GFP cassette knocked into the prdm1 locus

ORGANISM(S): Mus musculus

PROVIDER: GSE43213 | GEO | 2013/02/03

SECONDARY ACCESSION(S): PRJNA184935

REPOSITORIES: GEO

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Gene expression analysis of B cell differentiation using B cell blasts and developmentally arrested plasmablasts

Project description:In vitro generated blasts from B cells deficient in prdm1 were isolated according to whether they were attempting to express Blimp1, reported by a GFP cassette knocked into the prdm1 locus After four days stimulation with CD40L, IL4 and IL5, cells were FACS sorted into GFP+ and GFP- populations, RNA extracted and gene expression analysed by microarray. Data presented in Peparzak et al, 2013, Fig 3b.

2013-02-03 | E-GEOD-43213 | biostudies-arrayexpress

Blimp1/Prdm1 governs terminal differentiation of endovascular trophoblast giant cells and defines multipotent progenitors in the developing placenta

Project description:Expression profiling of Prdm1 mutant E9.5 placenta was performed using Illumina whole genome V2 arrays. The hypothesis tested in the present study was that Blimp1 regulates the transcription of key genes involved in trophoblast differentiation. We demonstrate that the invading SpA-TGCs display robust Blimp1 expression and Blimp1 functional loss selectively disrupts specification of this discrete TGC sub-type. Transcriptional profiling experiments identified additional SpA-TGC lineage restricted marker genes that potentially regulate placental morphogenesis. Prdm1BEH/+ (Vincent et al., 2005) animals were intercrossed to generate null placental tissue. Total RNA obtained from 10 Prdm1+/+ and 11 Prdm1-/- E9.5 placenta samples was hybridized to Illumina WG6_V2 beadchips.

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Project description:Expression profiling of Prdm1 mutant E18.5 small intestine was performed using Illumina whole genome V2 arrays. The hypothesis tested in the present study was that Blimp1 regulates the transcription of key genes involved in enterocyte differentiation and survival. Results identify substantial and premature activation of key components of the adult enterocyte biochemical signature. Villin-Cre and Prdm1BEH/+ animals were intercrossed to generate heterozygous Villin-Cre, Prdm1BEH males that were then mated with homozygous Prdm1 CA/CA females carrying the R26R allele to generate Prdm1+/+ (Prdm1CA/+) or Prdm1-/- (Villin-Cre, Prdm1CA/BEH) offspring. Total RNA obtained from 11 Prdm1+/+ and 10 Prdm1-/- E18.5 small intestine samples was hybridized to Illumina WG6_V2 beadchips.

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Project description:Expression profiling of wild-type and Prdm1 null mouse trophoblast giant cell cultures using Illumina whole genome mouse V2 arrays. The hypothesis tested was that Prdm1/Blimp1 regulates expression of genes required for spiral artery trophoblast giant cell function. Prdm1 null and littermate control wild-type trophoblast stem cell clones were generated from blastocyst outgrowths. Total RNA was obtained from multiple replicates of four wild-type TS cell clones and four Prdm1 null TS cell clones differenitated for zero, two, four and six days by growth factor withdrawal and hybridized to Illumina WG6_V2 arrays

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Molecular function of Prdm1/Blimp1 in trophoblast giant cell differentiation.

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Precocious expression of Blimp1 in the B cell lineage causes autoimmunity

Project description:The transcription factor Blimp1 is not only an essential regulator of plasma cells, but also a risk factor for the development of autoimmune disease. Here, we demonstrate that the mouse Prdm1 (Blimp1) gene was partially activated at the chromatin and transcription level in early B cell development, although mature Prdm1 mRNA did not accumulate due to posttranscriptional regulation. By analyzing a mouse model that facilitated ectopic Blimp1 protein expression throughout B lymphopoiesis, we could demonstrate that Blimp1 impaired B cell development by interfering with the B cell gene expression program, while leading to an increased abundance of plasma cells by promoting premature plasmablast differentiation of immature and mature B cells. With progressive age, these mice developed an autoimmune phenotype characterized by the presence of autoantibodies and glomerulonephritis. Hence, these data identified ectopic Blimp1 expression as a novel mechanism that can explain how Blimp1 as a risk factor contributes to the development of autoimmune disease.

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The transcriptional regulator Prdm1 is a master gene for the early development of the sensory whisker follicle and is wired to the Lef1 circuitry [CUT&TAG]

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Blimp1/Prdm1 governs terminal differentiation of endovascular trophoblast giant cells and defines multipotent progenitors in the developing placenta

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