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Investigation of the physiological functions of PRDM6

ABSTRACT: PRDM6 belongs to the PRDM family of transcriptional repressors that all contain a PR domain and Zinc finger domains. Prdm6 has transcriptional repressor activity. Prdm6 may regulate factors that are involved in the differentiation / proliferation of smooth muscle cells, promoting proliferation. PRDM6 knockouts are embryonic lethal around 12.0 dpc knockout embryos eventually develop edema: cardiovascular defect vascularization defect in the yolk sac: dysorganized angiogenesis Keywords: cDNA array, yolk sac, murine embryo E10.5

ORGANISM(S): Mus musculus

PROVIDER: GSE9065 | GEO | 2008/04/01

SECONDARY ACCESSION(S): PRJNA102577

REPOSITORIES: GEO

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Investigation of the physiological functions of PRDM6

Project description:PRDM6 belongs to the PRDM family of transcriptional repressors that all contain a PR domain and Zinc finger domains. Prdm6 has transcriptional repressor activity. Prdm6 may regulate factors that are involved in the differentiation / proliferation of smooth muscle cells, promoting proliferation. PRDM6 knockouts are embryonic lethal around 12.0 dpc knockout embryos eventually develop edema: cardiovascular defect vascularization defect in the yolk sac: dysorganized angiogenesis 6 homozygote samples (yolk sacs), age 10.5 days, hybridized against a pool of of 6 wildtype samples in 12 replicates including 6 dye swap experiments.

2010-05-22 | E-GEOD-9065 | biostudies-arrayexpress

Comparison of gene expression pattern between Wild-type and Hypb knockout embryo yolk sacs

Project description:This study aimed at exploring the physiological function of mammalian HYPB by means of knockout mouse model. Homogenous disruption of mouse Hypb gene leads to embryonic lethality at E10.5-E11.5. Severe vascular defects were observed in the Hypb-/- embryos, yolk sac and placenta.In the mutant embryo and yolk sac, disorganized and abnormally dilated capillaries cannot be remodeled into large blood vessels or intricate networks. Thus, our results suggest that the mammalian HYPB HMT plays an important role in embryonic vascularization. Keywords: knockout, mouse embryo development, angiogenesis, yolk sac, E9.0, E10.5

2009-12-28 | GSE10113 | GEO

Gene expression profiling of rudhira null embryo and yolk sac at 9.5 dpc

Project description:Rudhira is essential for mouse developmental angiogenesis and tissue morphogenesis. Embryos lacking endothelial rudhira die at mid-gestation with vascular patterning defects. Rudhira mutant yolk sac endothelial cells show slow and random migration. So to identify key signaling pathways perturbed in the absence of rudhira, we undertook whole transcriptome based analysis of gene expression in rudhira null yolk sac and embryo. Transcriptome analysis shows that key mediators of angiogenesis, cell adhesion, migration and extracellular matrix degradation as well as several components of the TGFÎ² pathway are perturbed in rudhira null mutant yolk sacs at 9.5 dpc. We used two embryo samples ( 2E- wild type; 5E- rudhira mutant). Repetition was done on each sample. We used 4 yolk sac samples (3Y,4Y- wild type; 7Y,8Y-rudhira mutant) for the analysis. Repetition was done on each sample.

2015-12-31 | E-GEOD-69204 | biostudies-arrayexpress

Gene expression profiling of rudhira null embryo and yolk sac at 9.5 dpc

Project description:Rudhira is essential for mouse developmental angiogenesis and tissue morphogenesis. Embryos lacking endothelial rudhira die at mid-gestation with vascular patterning defects. Rudhira mutant yolk sac endothelial cells show slow and random migration. So to identify key signaling pathways perturbed in the absence of rudhira, we undertook whole transcriptome based analysis of gene expression in rudhira null yolk sac and embryo. Transcriptome analysis shows that key mediators of angiogenesis, cell adhesion, migration and extracellular matrix degradation as well as several components of the TGFβ pathway are perturbed in rudhira null mutant yolk sacs at 9.5 dpc.

2015-12-31 | GSE69204 | GEO

Genome-wide gene expression analysis of Cirh1a heterozygote state on early embryo in mice

Project description:CIRHIN is a transcription co-factor, shows postive effect on Hiv-1 LTR enhancer element(NF-κB site); and Cirh1a null is preimplantation lethal, but highly expressed in the early mice embryo (E6.0-E12.5). We hypothesis that Cirh1a's effect on gene transcription of early embryo can be detected with Cirh1a down regulated in Cirh1a+/- state. Result shows that Cirh1a+/- has significant effect on early mice embryo gene transcription, Differentially expressed genes (DEGs) detected are mainly involved in cell proliferation/differenciation, cell cycle progress, embryo development and multi-orgnaogenesis. Littermate embryos (E8.5) were dissected into RNAlater reagent for total RNA extraction, and yolk sac was used for genotyping PCR. Littermate embryos (E9.5) were dissected into RNAlater reagent for total RNA extraction, and yolk sac was used for genotyping PCR. Liver buds from littermate embryos (E11.5) were dissected into RNAlater reagent for total RNA extraction, and yolk sac was used for genotyping PCR. Liver buds from littermate embryos were dissected into RNAlater reagent for total RNA extraction, and yolk sac was used for genotyping PCR.

2014-01-01 | E-GEOD-51104 | biostudies-arrayexpress

Human fetal yolk sac scRNA-seq data (sample ID: F158 for Haniffa Lab; 16099 for HDBR)

Project description:Investigating the blood, immune and stromal cells present in a human fetal embryo in a world first single cell transcriptomic atlas. The embryo was dissected into 12 coronal sections, yolk sac, and yolk sac stalk. Live single cells sorted, with cell suspension then undergoing 10x chromium 5 prime scRNA-seq. This accession contains the yolk sac and yolk sac stalk data from this embryo. A matched accession contains the coronal section data. Lane "WS_wEMB12142156" (from yolk sac) was excluded from downstream analysis due to low fraction reads in cells post-CellRanger QC. Termination procedure for this embryo was medical. The F158_[features...barcodes...matrix].[tsv...mtx].gz files attached to this accession represent raw count data from all the 10x lanes in this accession combined, and as output from CellRanger filtered matrices (CellRanger version 6.0.1 using human reference genome GRCh38-2020-A). One set of count matrices relates to the yolk sac data, and one set of count matrices relates to the yolk sac stalk data.

2022-12-07 | E-MTAB-11673 | biostudies-arrayexpress

Expression data from Tnrc6a (GW182) mutant yolk sac

2011-09-01 | GSE30244 | GEO

Erythro-myeloid progenitors contribute endothelial cells to developing blood vessels

Project description:The earliest blood vessels in the mammalian embryo are formed when endothelial cells (ECs) differentiate from angioblasts and coalesce into tubular networks. Thereafter, the en-dothelium is thought to expand solely by proliferation of pre-existing ECs. Here we show that the earliest precursors of erythrocytes, megakaryocytes and macrophages, the yolk sac-derived erythro-myeloid progenitors (EMPs), provide a complementary source of ECs that are recruited into pre-existing vasculature. Whereas a first wave of yolk sac-resident EMPs contributes ECs to the yolk sac endothelium, a second wave of EMPs colonises the embryo and contributes ECs to intraembryonic endothelium in multiple organs, where they persist into adulthood. By demonstrating that EMPs constitute a hitherto unrecognised source of ECs, we reveal that embryonic blood vascular endothelium expands in a dual mechanism that involves both the proliferation of pre-existing ECs and the incorporation of ECs derived from hematopoietic precursors.

2018-08-02 | GSE117978 | GEO

Self-organized yolk sac-like organoids allow for scalable generation of multipotent hematopoietic progenitor cells from human induced pluripotent stem cells

Project description:The human definitive yolk sac is an important organ supporting the early developing embryo through nutrient supply and by facilitating the establishment of the embryonic circulatory system. However, the molecular and cellular biology of the human yolk sac remains largely obscure due to the lack of suitable in vitro models. Here, we show that human induced pluripotent stem cells (hiPSCs) co-cultured with various types of stromal cells as spheroids self-organize into yolk sac-like organoids without the addition of exogenous factors. Yolk sac-like organoids recapitulated a yolk sac specific cellular complement and structures as well as the functional ability to generate definitive hematopoietic progenitor cells (HPCs). Furthermore, sequential hemato-vascular ontogenesis could be observed during organoid formation. Notably, our organoid system can be performed in a scalable, autologous, and xeno-free condition, thereby providing an important model of human definitive yolk sac development and allows for efficient bulk generation of hiPSC-derived HPCs.

2021-05-05 | GSE157140 | GEO

Expression data from Tnrc6a (GW182) mutant yolk sac

Project description:GW182 (Tnrc6a) is a key component of RISC (miRNA-Induced Silencing Complex) that plays a critical role in miRNA-mediated gene silencing. Here, we show that GW182 is expressed in the yolk sac endoderm, and that gene-trap disruption of GW182 leads to growth arrest of yolk sac endoderm, impaired hematopoiesis and embryonic lethality. To investigate roles of GW182 in the yolk sac endoderm, we assessed changes in mRNA expression in the yolk sac of E9.5 GW182gt/gt embryos using microarrays (Affymetrix). Yolk sac of wild type littermates and GW182gt/gt embryos at E9.5 was collected for total RNA isolation using Trizol (Invitrogen). RNAs were purified according to the manufacturer’s protocol before subjected to Mouse Gene 1.0 ST Whole Genome Array (Affymetrix) for mRNA expression profiling. Experiments were performed in triplicate. Differentially expressed mRNAs were identified using a two-sample t-test (P<0.05 considered significant).

2011-08-31 | E-GEOD-30244 | biostudies-arrayexpress

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