Browse
Submit Data
Databases
API
Help

Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

63 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Expression profiling of Wnt3a-treated HeLa cells in G1 and G2/M phase

ABSTRACT: The early transcriptional response of HeLa cervical carcinoma cells to the canonical Wnt signalling pathway was investigated at two different cell cycle phases (G1 and G2/M) via microarray gene expression profiling. HeLa cells grown under standard conditions were treated for 3 h with either Control, Wnt3a- or Dkk1-conditioned media and then FACS-sorted into G1 and G2/M populations for microarray expression analysis with 4 independent replicates per group.

ORGANISM(S): Homo sapiens

SUBMITTER: Emil Karaulanov

PROVIDER: E-GEOD-50248 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Similar Datasets

Expression profiling of Wnt3a-treated HeLa cells in G1 and G2/M phase

Project description:The early transcriptional response of HeLa cervical carcinoma cells to the canonical Wnt signalling pathway was investigated at two different cell cycle phases (G1 and G2/M) via microarray gene expression profiling.

2014-05-15 | GSE50248 | GEO

Transcription profiling of human cell lines reveals Dickkopf-1 is down-regulated by MYCN and inhibits neuroblastoma cell proliferation

Project description:Neuroblastomas are tumors of the developing peripheral sympathetic nervous system, which originates from the neural crest. Twenty percent of neuroblastomas show amplification of the MYCN oncogene, which correlates with poor prognosis. The MYCN transcription factor can activate and repress gene expression. To broaden our insight in the spectrum of genes down-regulated by MYCN, we generated gene expression profiles of the neuroblastoma cell lines SHEP-21N and SKNAS-NmycER, in which MYCN activity can be regulated. In this study, we show that MYCN suppresses the expression of Dickkopf-1 (DKK1) in both cell lines. DKK1 is a potent inhibitor of the wnt/ï?¢-catenin signalling cascade, which is known to function in neural crest cell migration. We generated a DKK1 inducible cell line, IMR32-DKK1, which showed impaired proliferation upon DKK1 expression. Surprisingly, DKK1 expression did not inhibit the canonical wnt/ï?¢-catenin signalling, suggesting a role of DKK1 in an alternative route of the wnt pathway. Gene expression profiling of two IMR32-DKK1 clones showed that only a few genes, amongst which SYNPO2, were up-regulated by DKK1. SYNPO2 encodes an actin-binding protein and was previously found to inhibit proliferation and invasiveness of prostate cancer cells. These results suggest that MYCN might stimulate cell proliferation by inhibiting the expression of DKK1. DKK1 might exert part of its growth suppressive effect by induction of SYNPO2 expression. Experiment Overall Design: Single time course experiment, including 4 time points

2008-06-16 | E-GEOD-8066 | biostudies-arrayexpress

Effects of DKK1 on global gene expression in female and male bovine embryos at the morula stage

Project description:Successful embryonic development depends upon molecules secreted by the reproduc-tive tract. Among such molecules is dickkopf 1 (DKK1), an canonical WNT antagonist that can also activate the planar cell polarity (PCP) pathway. Objectives were to determine whether DKK1 regulates expression of genes that promote differentiation, possibly through the PCP pathway, and to determine if actions of DKK1 on the embryonic transcriptome were dependent on embryo sex. Bovine oocytes were fertilized with pools of X- or Y-sorted sperm. Embryos were treated with 100 ng/ml DKK1 or vehicle at Day 5 of development and harvested 24 h later for microarray analysis of global gene expression. A total of 9,931 transcripts were identified as being expressed. with124 being differentially expressed genes between females and males. A total of 68% of the genes upregulated in females were located on the X chromosome. DKK1 changed expression of 132 genes in females and 136 in males. Of these, 34 genes were regulated by DKK1 in both sexes - 14 in the same direction and 20 in opposite directions. Evidence for regulation of the PCP pathway by DKK1 was the finding that DKK1 regulated expression of genes involved in cell polarization and differentiation in both females and males. In both sexes, DKK1 regulated expression of many genes associated with HNF4A, a marker of hypoblast cells that promotes formation of cell junctions. In conclusion, DKK1 regulates cell differentiation and embryonic development in a sex-dependent manner and effects may be mediated, at least in part, by activation of the PCP pathway. Bovine embryos produced with X- or Y-sorted sperm were cultured in vitro and treated with vehicle or DKK1 at day 5 of development and harvested at day 6 for RNA isolation, amplification and hibridization to Affymetrix Bovine Gene 1.0 ST arrays. The study was done in 5 replicates using pools of 20 morulae for each treatment.

2014-08-06 | E-GEOD-60098 | biostudies-arrayexpress

Expression profiling of HeLa cells at S and G2/M phases of mitotic cell cycle.

Project description:We compared the mRNAs expression profile of HeLa cells between two phases of the mitotic cell cycle: S and G2/M phases. Results provide insight into the regulation of transcript levels during mitotic cell cycle progression. HeLa cells were synchronized with double thymidine blockade (12 hours with 2 mM thymidine, 12 hours release, and 12 hours with 2 mM thymidine), and cells were taken after 2 hours release (S phase) and 8 hours release (G2/M phase). Keywords: time course Comparison of mRNAs measured at S phase (2 hours release after double thymidine blockade) and at G2/M phase (8 hours release after double thymidine blockade); 3 biological replicates at each of the two time points; two technical replicates with dye swapping per comparison; additional comparison between G2/M (8h) and S (2h).

2010-05-07 | E-GEOD-15547 | biostudies-arrayexpress

Transcription profiling of human p53+ and p53- fibroblasts treated with arsenite reveals exit from arsenite-induced mitotic arrest is p53 dependent

Project description:Microarray data from G2-synchronized p53(+) and p53(-) fibroblasts before and after 3 h release from cell cycle blockade in the presence of 5 uM sodium arsenite. Experiment Overall Design: Cells expressing p53 from a tet-off regulated construct were synchronized in G2 with a two-step procedure using 24 h aphidicolin treatment for initial G1 synchronization and 12 h of Hoechst 33342 to effect a G2 blockade. During Hoechst treatment, tetracycline was added to suppress p53 in half the cultures. Cells were then released into media containing 5 ÂµM sodium arsenite and the appropriate concentration of tetracycline to maintaining p53 expression. mRNAs were collected at 0 h and 3 h after release from G2 synchrony.

2007-11-11 | E-GEOD-7101 | biostudies-arrayexpress

Global analysis of differential polyadenylation of mRNAs during mitotic cell cycle: S phase versus G2/M phase.

Project description:We compared the poly(A) tail length status of mRNAs of HeLa cells between two phases of the mitotic cell cycle: S and G2/M phases. Hundreds of mRNAs were found to be regulated by changes in their poly(A) tail length during mitotic cell cycle in a phase specific manner. Many of these differentially polyadenylated mRNAs encode proteins related to cell death, cell cycle and cellular growth and proliferation. HeLa cells were synchronized with double thymidine blockade (12 hours with 2 mM thymidine, 12 hours release, and 12 hours with 2 mM thymidine), and samples were taken after 2 hours release (S phase) and 8 hours release (G2/M phase). For each condition total RNA was purified by two different procedures: poly(U) chromatography and oligo(dT)-chromatography. Poly(U)-chromatography (Jacobson, 1987): 100 Î¼g of total RNA were bound to poly(U)-sepharose (Sigma) and eluted at 35ÂºC to isolate mRNAs with short poly(A) tail (<30As, SHORT fraction). Oligo(dT) chromatography: mRNAs were purified independently of their poly(A) tail length with Ambion Poly(A)Purist kit from 20 Î¼g total RNA (ALL fraction). Jacobson, A. Purification and fractionation of poly(A)+ RNA. Methods in Enzymology (1987) 152: 254-261. Keywords: time course Comparison of ALL fraction mRNAs and SHORT fraction mRNAs measured after 2 hours (S phase) and 8 hours release (G2/M) from double thymidine blockade; 3 biological replicates at each of the two time points; two technical replicates with dye swapping per comparison.

2010-05-07 | E-GEOD-15399 | biostudies-arrayexpress

Genome-wide analysis of mitosis, early G1, late G1 and G2 in mouse pluripotent cells

Project description:We provide the genome-wide map of Esrrb binding in mitotic and asynchronous ES cells together with the Esrrb-induced transcriptomic changes in early G1, late G1 and G2.

2016-08-29 | GSE75066 | GEO

Expression data comparing human DKK1 and control vector transfected murine osteochondrosarcoma cells (MOS-J)

Project description:Canonical Wnt signaling controls proliferation and differentiation of osteogenic progenitor cells, and tumor-derived secretion of the Wnt antagonist Dickkopf-1 (Dkk1) is correlated with osteolyses and metastasis in many bone malignancies. However, the role of Dkk1 in the oncogenesis of primary osteosarcoma (OS) remains unexplored. Here, we over-expressed Dkk1 in the OS cell line MOS-J. Contrary to expectations, Dkk1 had autocrine effects on MOSJ cells in that it increased proliferation and resistance to metabolic stress in vitro. In vivo, Dkk1 expressing MOS-J cells formed larger and more destructive tumors than controls. These effects were attributed in part to up-regulation of the stress response enzyme and cancer stem cell marker aldehyde-dehydrogenase-1 (ALDH1) through Jun-N-terminal kinase signaling. This is the first report linking Dkk1 to tumor stress resistance, further supporting the targeting of Dkk1 not only to prevent and treat osteolytic bone lesions but also to reduce numbers of stress-resistant tumor cells. Two samples were analyzed, one human DKK1 transfected MOS-J cell sample and one control vector transfected MOS-J cell sample.

2012-12-22 | E-GEOD-43112 | biostudies-arrayexpress

Expression profiling of HeLa cells at S and G2/M phases of mitotic cell cycle.

2010-04-01 | GSE15547 | GEO