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Gene expression Classification of Colon Cancer defines six molecular subtypes with distinct clinical, molecular and survival characteristics

ABSTRACT: This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

ORGANISM(S): Homo sapiens

SUBMITTER: Nabila Elarouci

PROVIDER: E-GEOD-40967 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Gene expression classification of colon cancer into molecular subtypes: characterization, validation, and prognostic value.

Marisa Laetitia L de Reyniès Aurélien A Duval Alex A Selves Janick J Gaub Marie Pierre MP Vescovo Laure L Etienne-Grimaldi Marie-Christine MC Schiappa Renaud R Guenot Dominique D Ayadi Mira M Kirzin Sylvain S Chazal Maurice M Fléjou Jean-François JF Benchimol Daniel D Berger Anne A Lagarde Arnaud A Pencreach Erwan E Piard Françoise F Elias Dominique D Parc Yann Y Olschwang Sylviane S Milano Gérard G Laurent-Puig Pierre P Boige Valérie V

PLoS medicine 20130521 5

<h4>Background</h4>Colon cancer (CC) pathological staging fails to accurately predict recurrence, and to date, no gene expression signature has proven reliable for prognosis stratification in clinical practice, perhaps because CC is a heterogeneous disease. The aim of this study was to establish a comprehensive molecular classification of CC based on mRNA expression profile analyses.<h4>Methods and findings</h4>Fresh-frozen primary tumor samples from a large multicenter cohort of 750 patients wi ...[more]

PMID: 23700391

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Gene expression Classification of Colon Cancer defines six molecular subtypes with distinct clinical, molecular and survival characteristics [CGH]

Project description:From a clinical and molecular perspective, colon cancer (CC) is a heterogeneous disease but to date no classification based on high-density transcriptome data has been established. The aim of this study was to build up a robust molecular classification ofÂ mRNA expression profiles (Affymetrix U133Plus2) ofÂ a large series of 443 CC and to validate it on an independent serie of 123 CC and 906 public dataset.Â We identified and validated six molecular subtypes in this large cohort as a combination of multiple molecular processes that complement current disease stratification based on clinicopathological variables and molecular markers. The biological relevance of these subtypes was consolidated by significant differences in survival. These insights open new perspectives for improving prognostic models and targeted therapies. Among a large series of colon cancers collected for the Cartes d'IdentitÃ© des Tumeurs (CIT) program from the French Ligue Nationale Contre le Cancer (http://cit.ligue-cancer.net), 566 were analyzed for mRNA expression profiles using Affymetrix U133plus2 chip and, among theses, 463 could also be analyzed for DNA alteration profiles using the CGH Array (Â CIT-CGHarray V6). The 566 tumors was divided into a discovery dataset of 443 CC and a validation dataset of 123 CC.

2013-05-22 | E-GEOD-40966 | biostudies-arrayexpress

Expression and CGHarray profiling of Hepatosplenic T-cell Lymphomas (10 tumor samples)

Project description:A Cartes dIdentite des Tumeurs (CIT) project from the french Ligue Nationale Contre le Cancer (http://cit.ligue-cancer.net) | Affymetrix HG-U133 Plus 2.0 : 10 HSTL samples including biopsies (n=6), sorted tumor cells (n=3), cell line (n=1) | Agilent SurePrint G3 Human CGH Microarray 4x180K Arrays : 7 HSTL samples including biopsies (n=5), sorted tumor cells (n=1), cell line (n=1) | Submitter : Aurelien de Reynies <reyniesa@ligue-cancer.fr> | Project leader : Philippe Gaulard <philippe.gaulard@hmn.aphp.fr> The E-MTAB-638.additional.1.zip archive contains the CGH processed data file with additional chromosome coordiantes.

2011-09-30 | E-MTAB-638 | biostudies-arrayexpress

Expression and CGH array profiling of ductal carcinoma (135 tumor samples)

Project description:A Cartes d'Identité des Tumeurs (CIT) project from the french Ligue Nationale Contre le Cancer (http://cit.ligue-cancer.net) | Affymetrix HG-U133 Plus 2.0 : 46 samples| Agilent SurePrint G3 Human CGH Microarray 4x180K Arrays : 135 samples| To explore the prognostic value of genomic alterations present in primary tumours we perfom a comparative genomic hybridization study on BAC arrays for a panel of breast carcinoma from 45 patients with metastatic relapse and 95 others one, matched for age and axillary node involvement, without any recurrence after 11 years of follow up. Array CGH data was used in establishing a two parameters index representative first of the global level of aneusomy by chromosomal arm and second of the number of breackpoints throughout the genome. Submitter : Nabila Elarouci <elaroucin@ligue-cancer.fr> | Project leader : Michel Longy <longy@bergonie.org>

2012-02-01 | E-MTAB-748 | biostudies-arrayexpress

Comparative genomic hybridization of human nasal NK/T-cell Lymphoma (8 tumor samples, 2 cell lines)

Project description:A ï¾Cartes dï¾Identite des Tumeursï¾ (CIT) project from the french Ligue Nationale Contre le Cancer (http://cit.ligue-cancer.net ) | Human genome-wide CIT-aCGH-V6-4.4K : 8 NKTCL biopsies, 2 NKTCL cell lines. Biopsies and cell lines of NK/T-cell lymphoma, nasal-type (NKTCL) were subject to combined gene expression profiling (see E-TABM-702) and array-based comparative genomic hybridization analyses. | Submitter : Aurelien de Reynies <reyniesa@ligue-cancer.fr> | Project leader : Philippe Gaulard <philippe.gaulard@hmn.aphp.fr>

2009-12-31 | E-TABM-791 | biostudies-arrayexpress

Comparative genomic hybridization of human glioblastomas

Project description:A Cartes d'Identite des Tumeurs (CIT) project from the french Ligue Nationale Contre le Cancer (http://cit.ligue-cancer.net ) | Human genome-wide CIT-aCGH-V6-4.4K : 67 glioblastomas | Submitter : Aurelien de Reynies <reyniesa@ligue-cancer.fr> | Project leader : Francois Berger <fberger@ujf-grenoble.fr>

2010-06-30 | E-TABM-897 | biostudies-arrayexpress

Comparative genomic hybridization of 84 head and neck squamous cell carcinoma

Project description:A ﾑCartes dﾒIdentite des Tumeursﾒ (CIT) project from the french Ligue Nationale Contre le Cancer (http://cit.ligue-cancer.net ) | Human genome-wide CIT-aCGH-V7-4.7K : 84 HNSCC | Submitter : Aurelien de Reynies <reyniesa@ligue-cancer.fr> | Project leader : Bohdan Wazylyk <boh@igbmc.fr>

2010-05-15 | E-TABM-995 | biostudies-arrayexpress

CGHarray profiling of adrenocortical tumors (ACTs)

Project description:A Cartes dM-^RIdentite des Tumeurs (CIT) project from the french Ligue Nationale Contre le Cancer (http://cit.ligue-cancer.net) | IntegraChipTM BAC pangenomic arrays (IntegraGen, Evry, France) : 59 ACTs samples including adrenocortical carcinomas (n=21) and adenomas (n=38) | Submitter : Olivia Barreau <olivia.barreau@inserm.fr> | Project leader : Jerome Bertherat <jerome.bertherat@inserm.fr>.

2011-04-18 | E-MTAB-659 | biostudies-arrayexpress

CBP occupancy in Drosophila S2 cells

Project description:CREB-binding protein (CBP, also known as nejire) is a transcriptional co-activator that is conserved in metazoans. We have generated CBP ChIP-seq data from Drosophila S2 cells and compared it to modENCODE data. This shows that CBP is bound at genomic sites with a wide range of functions. As expected, we find that CBP is bound at active promoters and enhancers. In addition, we find that the strongest CBP sites in the genome are found at Polycomb Response Elements embedded in histone H3 lysine 27 trimethylated (H3K27me3) chromatin, where they correlate with binding of the Pho repressive complex. Interestingly, we find that CBP also binds to most insulators in the genome. At a subset of these, CBP may regulate insulating activity, measured as the ability to prevent repressive H3K27 methylation from spreading into adjacent chromatin. ChIP seq in Drosophila S2 cells using two different antibodies against CBP (nejire), one raised in rabbit against amino acids 2540-3190 (CBP rb), and one raised in guinea-pig against amino acids 1-178 (CBP gp)

2015-11-06 | E-GEOD-64464 | biostudies-arrayexpress

Genomic architecture characterizes tumor progression paths and fate in breast cancer patients

Project description:Distinct molecular subtypes of breast carcinomas have been identified, but translation into clinical use has been limited. We have developed two platform independent algorithms to explore genomic architectural distortion using array comparative genomic hybridization (aCGH) data to measure 1) whole arm gains and losses (WAAI) and 2) complex rearrangements (CAAI). By applying CAAI and WAAI to data from 595 breast cancer patients we were able to separate the cases into eight subgroups with different distribution of genomic distortion. Within each subgroup data from expression analyses, sequencing and ploidy indicated that progression occurs along separate paths into more complex genotypes. Histological grade had prognostic impact only in the Luminal related groups while the complexity identified by CAAI had an overall independent prognostic power. This study emphasizes the relationship between structural genomic alterations, molecular subtype and clinical behavior, and provides a score of genomic complexity as a new tool for prognostication in breast cancer. Array CGH of 255 breast tumor samples vs a male skin fibroblast reference sample, in color reversal.

2009-12-15 | E-GEOD-19425 | biostudies-arrayexpress

Comparative genomic hybridization by array of human brain metastases and primary breast carcinomas

Project description:This study comprises arrayCGH data from the University clinic Eppendorf (UKE) in Hamburg. The array platform being used is the VUMC v30 30k Oligo chip

2012-03-08 | E-MTAB-354 | biostudies-arrayexpress

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