We investigated morphometric structure and gene expression by microarray analysis in a small diameter artery, branch of the saphenous artery (a resistance artery), in representative models of renin-angiotensin system (RAS)-dependent and glucocorticoid hypertension, using the spontaneously hypertensive rat (SHR) and adrenocorticotropic hormone (ACTH)-induced hypertensive rat, respectively.
Vascular microarray profiling in two models of hypertension identifies caveolin-1, Rgs2 and Rgs5 as antihypertensive targets.
No sample metadata fields
View SamplesThe Polycomb group (PcG) proteins form chromatin-modifying complexes that are essential for embryonic development and stem cell renewal and are commonly deregulated in cancer. Here, we identify their target genes using genome-wide location analysis in human embryonic fibroblasts. We find that Polycomb-Repressive Complex 1 (PRC1), PRC2, and tri-methylated histone H3K27 co-occupy >1000 silenced genes with a strong functional bias for embryonic development and cell fate decisions. We functionally identify 40 genes derepressed in human embryonic fibroblasts depleted of the PRC2 components (EZH2, EED, SUZ12) and the PRC1 component, BMI-1. Interestingly, several markers of osteogenesis, adipogenesis, and chrondrogenesis are among these genes, consistent with the mesenchymal origin of fibroblasts. Using a neuronal model of differentiation, we delineate two different mechanisms for regulating PcG target genes. For genes activated during differentiation, PcGs are displaced. However, for genes repressed during differentiation, we paradoxically find that they are already bound by the PcGs in nondifferentiated cells despite being actively transcribed. Our results are consistent with the hypothesis that PcGs are part of a preprogrammed memory system established during embryogenesis marking certain key genes for repressive signals during subsequent developmental and differentiation processes.
Genome-wide mapping of Polycomb target genes unravels their roles in cell fate transitions.
No sample metadata fields
View SamplesPolycomb group (PcG) proteins form multiprotein complexes, called Polycomb repressive complexes (PRCs). PRC2 contains the PcG proteins EZH2, SUZ12, and EED and represses transcription through methylation of lysine (K) 27 of histone H3 (H3). Suz12 is essential for PRC2 activity and its inactivation results in early lethality of mouse embryos.
The polycomb group protein Suz12 is required for embryonic stem cell differentiation.
Specimen part
View SamplesWe created a mouse model where conditional expression of physiologic levels of an Mll-AF4 fusion oncogene induces development of acute lymphoblastic (ALL) or acute myeloid leukemias (AML). Immunophenotypic and gene expression analysis of the ALL cells demonstrated bone marrow replacement with B-precursor cells which express a gene expression profile that has significant overlap with profiles in human MLL-rearranged ALL.
H3K79 methylation profiles define murine and human MLL-AF4 leukemias.
Specimen part
View SamplesWe created a mouse model where conditional expression of physiologic levels of an Mll-AF4 fusion oncogene induces development of acute lymphoblastic (ALL) or acute myeloid leukemias (AML). Immunophenotypic and gene expression analysis of the ALL cells demonstrated bone marrow replacement with B-precursor cells which express a gene expression profile that has significant overlap with profiles in human MLL-rearranged ALL.
H3K79 methylation profiles define murine and human MLL-AF4 leukemias.
Specimen part
View SamplesWe created a mouse model where conditional expression of physiologic levels of an Mll-AF4 fusion oncogene induces development of acute lymphoblastic (ALL) or acute myeloid leukemias (AML). Immunophenotypic and gene expression analysis of the ALL cells demonstrated bone marrow replacement with B-precursor cells which express a gene expression profile that has significant overlap with profiles in human MLL-rearranged ALL.
H3K79 methylation profiles define murine and human MLL-AF4 leukemias.
Specimen part
View SamplesRNA-Sequencing (RNA-seq). The aim of this RNA-seq experiment was to monitor the genome-wide transcriptional changes in mouse embryonic stem cells depleted of either Fam60a or Sin3a. Overall design: RNA-Seq of mRNA level of mESCs depleted for Sin3a and Fam60a.
Fam60a defines a variant Sin3a-Hdac complex in embryonic stem cells required for self-renewal.
Specimen part, Subject
View SamplesHITS-CLIP of control and transfected cells to find direct targetting of miR-200 family to mRNA
Genome-wide identification of miR-200 targets reveals a regulatory network controlling cell invasion.
No sample metadata fields
View SamplesPrimary xenografts were made from a variety of different high-risk childhood BCP-ALL leukemia samples.
Evaluation of the in vitro and in vivo efficacy of the JAK inhibitor AZD1480 against JAK-mutated acute lymphoblastic leukemia.
Specimen part
View SamplesTranscriptome profiling using RNA-seq of MV+, a mouse lens epithelium cell line expressing Pax6 and RAG renal adenocarcinoma cell line which does not express Pax6. Overall design: Total RNA was collected and a Illumina sequencing libraries prepared from three biological replicates of cultured MV+ and RAG cells.
Polymer Simulations of Heteromorphic Chromatin Predict the 3D Folding of Complex Genomic Loci.
Cell line, Subject
View Samples