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Nuclear scaffold and matrix attachment of Aortic Adventitial Fibroblast (AoAF) chromatin

ABSTRACT: The nuclear scaffold/matrix provides an anchor for higher order genome structure that has both structural and functional implications. Different extraction protocols, i.e., utilizing either 25 mM LIS or 2 M NaCl, isolate somewhat different protein constituents of either the nuclear scaffold or nuclear matrix respectively. We have mapped, by array CGH, the locations of attachment to each of these residual protein bodies relative to non-attached DNA along the entire length of human chromosomes 14, 15, 16, 17 and 18 in AoAF cells.

ORGANISM(S): Homo sapiens

PROVIDER: GSE13792 | GEO | 2009/03/11

SECONDARY ACCESSION(S): PRJNA110549

REPOSITORIES: GEO

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Nuclear scaffold and matrix attachment of Aortic Adventitial Fibroblast (AoAF) chromatin

Project description:The nuclear scaffold/matrix provides an anchor for higher order genome structure that has both structural and functional implications. Different extraction protocols, i.e., utilizing either 25 mM LIS or 2 M NaCl, isolate somewhat different protein constituents of either the nuclear scaffold or nuclear matrix respectively. We have mapped, by array CGH, the locations of attachment to each of these residual protein bodies relative to non-attached DNA along the entire length of human chromosomes 14, 15, 16, 17 and 18 in AoAF cells. LIS (lithium 3,5-diiodosalicylate) or 2 M NaCl solutions followed by restriction digestion with EcoR1 facilitates the separation from scaffold/matrix bound DNA from non bound DNA. Genomic CGH arrays were used to map the relative differences between attached (scaffold/matrix) and non-attached (loop) portions of AoAF DNA. The expression profile of the AoAF cells used for aCGH analysis was determined.

2009-03-10 | E-GEOD-13792 | biostudies-arrayexpress

Nuclear scaffold and matrix attachment of HeLa chromatin

Project description:The nuclear scaffold/matrix provides an anchor for higher order genome structure that has both structural and functional implications. Different extraction protocols, i.e., utilizing either 25 mM LIS or 2 M NaCl, isolate somewhat different protein constituents of either the nuclear scaffold or nuclear matrix respectively. We have mapped, by array CGH, the locations of attachment to each of these residual protein bodies relative to non-attached DNA along the entire length of human chromosomes 14, 15, 16, 17 and 18 in HeLa cells. LIS or 2 M NaCl solutions followed by restriction digestion with EcoR1 facilitates the separation from scaffold/matrix bound DNA from non bound DNA. Genomic CGH arrays were used to map the relative differences between attached (scaffold/matrix) and non-attached (loop) portions of HeLa DNA. The expression profile of the HeLa cells used for aCGH analysis was also determined.

2010-05-22 | E-GEOD-13774 | biostudies-arrayexpress

Nuclear scaffold and matrix attachment of HeLa chromatin

2009-02-27 | GSE13774 | GEO

Nuclear Scaffold Attachment Sites in HeLa Cells Across 1% of the Human Genome

Project description:The nuclear scaffold, consisting of structural and functional nuclear proteins, remains after extraction of nuclei and anchors loops of DNA. In the search for cis-elements functioning as chromatin domain boundaries, we mapped 453 nuclear scaffold attachment sites purified by lithium-3,5-iodosalicylate from HeLa cells across 30 Mb of the human genome studied by the ENCODE pilot project. The scaffold attachment sites recovered mapped predominately near expressed genes and localized near transcription start sites and the ends of genes.

2011-03-23 | GSE26477 | GEO

In Vivo Mapping of Arabidopsis Scaffold/Matrix Attachment Regions Reveals Link to Nucleosome-Disfavoring Poly(dA:dT) Tracts

Project description:Scaffold or matrix attachment regions (S/MARs) are found in all eukaryotes. The pattern of distribution and genomic context of S/MARs is thought to be important for processes such as chromatin organization and modulation of gene expression. Despite the importance of such processes, much is unknown about the large-scale distribution and sequence content of S/ MARs in vivo. Here, we report the use of tiling microarrays to map 1358 S/MARs on Arabidopsis thaliana chromosome 4 (chr4). S/MARs occur throughout chr4, spaced much more closely than in the large plant and animal genomes that have been studied to date. Arabidopsis S/MARs can be divided into five clusters based on their association with other genomic features, suggesting a diversity of functions. While some Arabidopsis S/MARs may define structural domains, most occur near the transcription start sites of genes. Genes associated with these S/MARs have an increased probability of expression, which is particularly pronounced in the case of transcription factor genes. Analysis of sequence motifs and 6-mer enrichment patterns show that S/MARs are preferentially enriched in poly(dA:dT) tracts, sequences that resist nucleosome formation, and the majority of S/MARs contain at least one nucleosome-depleted region. This global view of S/MARs provides a framework to begin evaluating genome-scale models for S/MAR function. Contrast between DNA bound to nuclear scaffold/matrix and total genomic DNA in Arabidopsis Chr4 excluding the constitutive heterochromatin. Total of three biological replicates with two independent hybridizations on custom-designed NimbleGen high-density microarrays that include duplicate spots for each probe.

2014-02-03 | E-GEOD-45549 | biostudies-arrayexpress

Transcription profiling of human fibroblasts grown in petri dishes vs. attached to a tissue engineering scaffold sampled at 7 timepoints.

Project description:A goal of tissue engineering is to produce a scaffold material that will guide cells to differentiate and regenerate functional replacement tissue at the site of injury. Little is known about how cells respond on a molecular level to tissue engineering scaffold materials. In this work we used oligonucleotide microarrays to interrogate gene expression profiles associated with cell-biomaterial interactions. We seeded collagen-glycosaminoglycan meshes, a widely used tissue engineering scaffold material, with human IMR-90 fibroblasts and compared transcript levels with control cells grown on tissue culture polystyrene. Genes involved in cell signaling, extracellular matrix remodeling, inflammation, angiogenesis and hypoxia were all activated in cells on the collagen-GAG mesh. Understanding the impact of a scaffold on attached cells will facilitate the design of improved tissue engineering materials.

2007-10-26 | E-GEOD-6432 | biostudies-arrayexpress

Chromatin attachment to the nuclear matrix represses hypocotyl elongation in Arabidopsis thaliana

Project description:The nuclear matrix was identified as a nuclear fraction in eukaryotic cells that offers a supporting scaffold for chromatin. While the structure is known in plant nuclei for decades, the distribution of regions attaching at plant nuclei, and how the nuclear matrix influences chromatin status is largely unkown. Here, we identify novel proteins, FRS7 (FAR1 RELATED SEQUENCE 7) and FRS12, attaching chromatin regions at the nuclear matrix in Arabidopsis thaliana. We found the above two proteins cooperate with AHL22 (AT-hook Motif Nuclear Localized 22) in repress hypocotyl elongation, by recruiting chromatin regions and histone deacetylases to the nuclear matrix and silence the genes. These findings shed light on understanding regulation and roles of the nuclear matrix influence in epigenetic and transcriptional regulation in Arabidopsis.

2024-02-23 | GSE215135 | GEO

Homo sapiens

Project description:Nuclear scaffold and matrix attachment of HeLa chromatin

| PRJNA110783 | ENA

RNA-seq analysis of scaffold attachment factor A (SAF-A) knockdown in RPE1 cells

Project description:Analysis of gene expression by RNA-seq upon siRNA mediated knockdown of scaffold attachment factor A (SAF-A) versus control siRNA in RPE1 cells at 24 hour and 48 hour time points post transfection reveals SAF-A loss does not impact on gene transcription

2017-06-01 | GSE98541 | GEO