We used microarrays to determine global gene expression in primary tumor tissues (ESCC) and matched normal tissues (adjacent normal esophageal mucosa)
Hypoxia activates the cyclooxygenase-2-prostaglandin E synthase axis.
Sex, Age, Specimen part
View SamplesTo delineate the role of hypoxia in esophageal epithelial biology, we carried out gene array experiments using a non-transformed immortalized diploid human esophageal cell line, EPC2-hTERT (Mol Cancer Res. 2003;1:729-38). Unlike cancer cell lines, EPC2-hTERT has no genetic alterations at early passages that may affect the cellular response to hypoxia.
Hypoxia activates the cyclooxygenase-2-prostaglandin E synthase axis.
No sample metadata fields
View SamplesTo determine the role of NOTCH3 in human esophageal epitheila homeostasis/squamous cell differentiation
A NOTCH3-mediated squamous cell differentiation program limits expansion of EMT-competent cells that express the ZEB transcription factors.
Specimen part, Treatment
View SamplesSSEA1+ c-kit+cells sorted from mouse embryonic stem cells differentiated for 4 days in 10uM Retinoic acid do not form teratomas when transplated into SCID mice while Pten-/- cells do.
Loss of Pten causes tumor initiation following differentiation of murine pluripotent stem cells due to failed repression of Nanog.
Specimen part
View SamplesAPC inactivation is the early process in the tumorigenesis of colorectal cancer. We established organoid cultures from intestines of genetically modifeid mice harboring Apcfl/fl, Tacc3wt/wt or Apcfl/fl, Tacc3fl/fll and R26CreERT2 allele
Suppression of intestinal tumors by targeting the mitotic spindle of intestinal stem cells.
Specimen part
View SamplesTranscription factor access to regulatory elements is prevented by the nucleosome. Heat shock factor 1 (HSF1) is a winged helix transcription factor that plays roles in control and stressed conditions by gaining access to target elements, but mechanisms of HSF1 access have not been well known in mammalian cells. We show a physical interaction between the wing motif of human HSF1 and replication protein A (RPA), which is involved in DNA metabolism. Depletion of RPA1 abolishes HSF1 access to the promoter of HSP70 in unstressed conditions, and delays its rapid activation in response to heat shock. The HSF1-RPA complex leads preloading of RNA polymerase II and opens chromatin structure by recruiting a histone chaperone FACT. Furthermore, this interaction is required for melanoma cell proliferation. These results provide a mechanistic basis for constitutive HSF1 access to nucleosomal DNA, which is important for both basal and inducible gene expression.
RPA assists HSF1 access to nucleosomal DNA by recruiting histone chaperone FACT.
Specimen part
View SamplesIn addition to transcriptional regulation, mRNA degradation critically contributes to gene expression as shown by various biological analysis. The CCR4-NOT complex serves as a major deadenylase that initiates mRNA degradation.
CNOT3 suppression promotes necroptosis by stabilizing mRNAs for cell death-inducing proteins.
Specimen part, Time
View SamplesDefects in mitochondrial oxidative phosphorylation complexes, altered bioenergetics and metabolic shift are often seen in cancers. Here we show a role for the dysfunction of electron transport chain component, cytochrome c oxidase (CcO) in cancer progression. We show that genetic silencing of the CcO complex by shRNA expression and loss of CcO activity in multiple cell types from the mouse and human sources resulted in metabolic shift to glycolysis, loss of anchorage dependent growth and acquired invasive phenotypes. Disruption of CcO complex caused loss of transmembrane potential and induction of Ca2+/Calcineurin-mediated retrograde signaling. Propagation of this signaling, includes activation of PI3-kinase, IGF1R and Akt, Ca2+ sensitive transcription factors and also, TGF1, MMP16, periostin that are involved in oncogenic progression. Whole genome expression analysis showed up regulation of genes involved in cell signaling, extracellular matrix interactions, cell morphogenesis, cell motility and migration. The transcription profiles reveal extensive similarity to retrograde signaling initiated by partial mtDNA depletion, though distinct differences are observed in signaling induced by CcO dysfunction. The possible CcO dysfunction as a biomarker for cancer progression was supported by data showing that esophageal tumors from human patients show reduced CcO subunits IVi1 and Vb in regions that were previously shown to be hypoxic core of the tumors. Our results show that mitochondrial electron transport chain defect initiates a retrograde signaling. These results suggest that a defect in CcO complex can potentially induce tumor progression.
Disruption of cytochrome c oxidase function induces the Warburg effect and metabolic reprogramming.
Cell line
View SamplesWe used microarrays to select the genes associated glioma patients survival.
Gene expression signature-based prognostic risk score in patients with glioblastoma.
Sex, Age, Disease, Disease stage
View SamplesWe report gene expression data for FACS sorted zebrafish mpeg1:mCherry + and mpx:EGFP + cells collected from whole embryos at 72 hours post fertilization (hpf). We also report gene expression data for the remaining, transgene negative, portion of these embryos. Overall design: ~1,000 mpeg1:mCherry+; mpx:EGFP+ transgenic embryos were homogenized, filtered, and sorted using FACS into PBS, collecting >50,000 cells for each of the three populations: mpeg1:mCherry+, mpx:EGFP+ and double negative (no double positive cells were collected as there was almost no overlap between mCherry and EGFP expression).
Distinct Roles for Matrix Metalloproteinases 2 and 9 in Embryonic Hematopoietic Stem Cell Emergence, Migration, and Niche Colonization.
No sample metadata fields
View Samples