Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Gene expression profile Colorectal Tumor and Normal tissue samples

ABSTRACT: Analysis of 4 pairs of colorectal cancer tissue and paraneoplastic tissue. The fresh frozen samples were obtained during surgical procedures. Results provide insight into molecular mechanisms underlying malignancy.

ORGANISM(S): Homo sapiens

PROVIDER: GSE75970 | GEO | 2016/12/01

SECONDARY ACCESSION(S): PRJNA305877

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Genomic Landscape of Diploid and Aneuploid Microsatellite Stable Early Onset Colorectal Cancer

Project description:We applied DNA content based flow cytometry methods to interrogate the genomes of clinical samples from 21 patients with early onset colorectal carcinoma (EOCRC). These included a fresh frozen sample obtained from a surgical resection and 20 archived formalin fixed paraffin embedded (FFPE) samples from a Mayo Clinic tissue bank. Our flow sorting methods are compatible with analyses of biopsies of interest including FFPE samples and frozen biopsies. Notably for this study we distinguished and sorted diploid and aneuploid tumors. We then profiled the exomes of tumor normal pairs for all 21 cases, the whole genome copy number for a subset of 6 samples, and telomere length in diploid and aneuploid nuclei from 9 cases. Additionally, we screened the 20 FFPE cases for EGFR expression with an established IHC assay.

2024-02-21 | GSE240339 | GEO

Genome-wide expression data of breast cancer samples

Project description:DASL gene expression data of fresh-frozen breast cancer tissue samples

2014-07-09 | GSE59198 | GEO

Gene expression analysis of colorectal tumors and matched adjacent non-tumor colorectal tissues.

Project description:We performed gene expression profiling of 26 colorectal tumors and matched histologically normal adjacent colonic tissue samples using the Illumina Ref-8 whole-genome expression BeadChip. We performed an integrated analysis of promoter DNA methylation and gene expression data to investigate the effects of DNA hypermethylation on gene expression. Total RNA was isolated from 26 pairs of fresh frozen colorectal tumor and matched adjacent non-tumor tissue samples. Their gene expression profiles were obtained using the Illumina Ref-8 whole-genome expression BeadChip (HumanRef-8 v3.0, 24,526 transcripts).

2011-06-03 | E-GEOD-25070 | biostudies-arrayexpress

A Methodology for Utilization of Predictive Genomic Signatures in FFPE Samples

Project description:Purpose: Gene expression signatures developed to measure the activity of oncogenic signaling pathways have been used to dissect the heterogeneity of tumor samples and to predict sensitivity to various cancer drugs that target components of the relevant pathways, thus potentially identifying therapeutic options for subgroups of patients. To facilitate broad use, including in a clinical setting, the ability to generate data from formalin-fixed, paraffin-embedded (FFPE) tissues is essential. Experimental Design: Patterns of pathway activity in matched fresh-frozen and FFPE xenograft tumor samples were generated using the MessageAmp Premier methodology in combination with assays using Affymetrix arrays. Results generated were compared with those obtained from fresh-frozen samples using a standard Affymetrix assay. In addition, gene expression data from patient matched fresh-frozen and FFPE melanomas were also utilized to evaluate the consistency of predictions of oncogenic signaling pathway status. Results: Significant correlation of pathway activity predictions was observed between paired fresh-frozen and FFPE xenograft tumor samples. In addition, significant concordance of pathway activity predictions was also observed between patient matched fresh-frozen and FFPE melanomas. Conclusion: Reliable and consistent predictions of oncogenic pathway activities can be obtained from FFPE tumor tissue samples. The ability to reliably utilize FFPE patient tumor tissue samples for genomic analyses will lead to a better understanding of the biology of disease progression and, in the clinical setting, will provide tools to guide the choice of therapeutics to those most likely to be effective in treating a patient’s disease.

2011-06-24 | GSE29598 | GEO

Epigenome analysis of normal and schizophrenic samples

Project description:We analyzed fresh frozen post-mortem brain tissue from a cohort of 73 schizophrenic and 52 control samples, using the Illumina Infinium HumanMethylation450 Bead Chip, to investigate genome-wide DNA methylation patterns in patients diagnosed with schizophrenia.

2019-03-21 | GSE128601 | GEO

Gene expression signatures for bladder cancer tissues and normal adjacent tissues

Project description:To identify aberrantly expressed long intergenic noncoding RNAs (lincRNAs) in bladder cancer tissues compared with normal adjacent tissues, we have employed microarray expression profiling as a discovery platform to identify lincRNAs that may play important roles in bladder cancer origin and progression. Samples of fresh frozen cancer tissues, together with normal adjacent tissues (3 cm away from the tumor), were obtained during surgical resection, and total RNA was extracted for microarray analysis. Two pairs of fresh frozen bladder cancer tissues and corresponding normal adjacent tissues were used in the microarray analysis.

2014-09-22 | E-GEOD-61615 | biostudies-arrayexpress

Development of gene expression signatures for normal and tumor-associated cervix fibroblasts

Project description:Fresh surgical specimens of Wertheim tumors, not used for for diagnostic purpose, were utilized to establish primary cell cultures. Frozen sections were used to determine the tumor free, and tumorous areas. Small tissue pieces of normal or tumorous regions were let to grow in Amnio-grow medium. Primary cells were positive for vimentin and negative for cytokeratin.

2020-04-16 | GSE148747 | GEO

Cerebrovasculature in brain malignancies from 13 surgical resected samples

Project description:Dysfunction in human cerebrovasculature contribute to pathogenesis of multiple neurological diseases, and the blood brain barrier (BBB), an organotypic specialization of the cerebrovasculature, impedes the delivery of systemic therapies for nearly all brain disorders.Here we developed a novel methodology to isolate fresh cells from the human cerebrovasculature with high capture efficiency and cell viability, and performed single-cell mRNA sequencing (scRNAseq) for human cerebrovascular cells from 13 surgical resected samples, including normal human brain tissue and gliomas, the most common brain malignancy. We profiled the transcriptome of 103,230 single cells, including 57,324 endothelial cells and 27,703 mural cells.We molecular defined the principle vascular cell types in the BBB, and uncovered molecular underpinning of heterogeneity in endothelial cells, mural cells and perivascular fibroblasts along the arteriovenous axis.

2024-08-26 | GSE242044 | GEO

Transcription profiling of human breast cancer or Dukes B colon cancer samples to compare the outcome from those fresh frozen and those stored in RNAlater preservative

Project description:A number of breast or colon specific genes predictive of the relapse status were used in comparing the outcome from matched fresh frozen and stored in RNAlater preservative. Experiment Overall Design: 31 pairs of matched breast and 21 pairs of matched colon primary tumors either fresh frozen or stored in RNAlater preservative

2007-10-02 | E-GEOD-3726 | biostudies-arrayexpress

Heterogeneity in global gene expression profiles between biopsy specimens taken peri-surgically from primary ER-positive breast carcinomas (diagnostic/surgical samples)

Project description:Gene expression is widely used for the characterization of breast cancers. Variability due to tissue heterogeneity or measurement error or systematic change due to peri-surgical procedures can affect measurements but is poorly documented. We studied the variability of global gene expression between core-cuts of primary ER+ breast cancers and the impact of delays to tissue stabilization due to sample x-ray and of diagnostic core-cutting. Twenty-three and 56 sample pairs, respectively, were suitable for analysis. In general, there is a good correlation in gene expression between pairs of core-cuts except where genes have a narrow dynamic range. Increases in the expression of several stress/early-response genes (e.g., FOS, FOSB, JUN) were found in both studies. Substantial changes in expression of early response genes occur within an hour after surgery and in IL6, IGFB2 and MYC as a result of diagnostic core-cut biopsy. Similar correlation coefficients to the average gene expression profiles of intrinsic subtype, particularly LumA and LumB, can lead to discordances between assigned subtypes.

2016-03-29 | GSE73235 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data