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Unknown,Transcriptomics,Genomics,Proteomics

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Gene expression profiling of archival tongue carcinoma and normal tongue tissue

ABSTRACT: This SuperSeries is composed of the following subset Series: GSE34105: Gene expression profiling of archival tongue carcinoma and normal tongue tissue (all samples) GSE34106: Gene expression profiling of archival tongue carcinoma and normal tongue tissue (subset) Refer to individual Series

ORGANISM(S): Homo sapiens

SUBMITTER: Matilda Rentoft

PROVIDER: E-GEOD-34115 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Transcriptional profiling of formalin fixed paraffin embedded tissue: pitfalls and recommendations for identifying biologically relevant changes.

Rentoft Matilda M Coates Philip John PJ Laurell Göran G Nylander Karin K

PloS one 20120417 4

Expression profiling techniques have been used to study the biology of many types of cancer but have been limited to some extent by the requirement for collection of fresh tissue. In contrast, formalin fixed paraffin embedded (FFPE) samples are widely available and represent a vast resource of potential material. The techniques used to handle the degraded and modified RNA from these samples are relatively new and all the pitfalls and limitations of this material for whole genome expression profi ...[more]

PMID: 22530001

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Gene expression profiling of archival tongue carcinoma and normal tongue tissue (subset)

Project description:RNA extracted from 78 FFPE tongue samples, 62 tongue carcinomas and 16 non-malignant controls, were succesfully analysed using the whole genome DASL array to obtain gene expression profiles. Gene expression profiles were used to identify differentially expressed genes with the ultimate goal of finding out their importance for tongue cancer development and maintenance. Sample were formalin fixed paraffin embedded biopsies taken for diagnostic purposes and had been stored between 1 and 13 years. Because of the general poor quality of RNA from archival samples a special focus were put on its effect on the detected expression levels. 28 tumours and 16 controls with a CTdiff< 5 were selected for differential gene expression analysis. Raw data for only these samples were normalized again. Data for these 44 samples can be found here. Total RNA from formalin fixed paraffin embedded sample was extracted using the High Pure RNA Paraffin Kit according to the manufacturer’s protocol. Quality of FFPE sample were evaluated by comparing how well a kousekeeping gene (TUBA6) could be amplified using q-PCR in each FFPE sample compared to two fresh frozen sample (Ctdiff= CTffpe-Ctff). The DASL platform (cDNA-mediated annealing, selection, extension, and ligation assay) was used together with the whole genome arrays to obtain expression data for 20 818 genes.

2012-05-10 | E-GEOD-34106 | biostudies-arrayexpress

Gene expression profiling of archival tongue carcinoma and normal tongue tissue (all samples)

Project description:RNA extracted from 78 FFPE tongue samples, 62 tongue carcinomas and 16 non-malignant controls, were succesfully analysed using the whole genome DASL array to obtain gene expression profiles. Gene expression profiles were used to identify differentially expressed genes with the ultimate goal of finding out their importance for tongue cancer development and maintenance. Sample were formalin fixed paraffin embedded biopsies taken for diagnostic purposes and had been stored between 1 and 13 years. Because of the general poor quality of RNA from archival samples a special focus were put on its effect on the detected expression levels. 28 tumours and 16 controls with a CTdiff< 5 were selected for differential gene expression analysis. Data for only these sample were normalized again and can be found in seperate data file. Total RNA from formalin fixed paraffin embedded sample was extracted using the High Pure RNA Paraffin Kit according to the manufacturer’s protocol. Quality of FFPE sample were evaluated by comparing how well a kousekeeping gene (TUBA6) could be amplified using q-PCR in each FFPE sample compared to two fresh frozen sample (Ctdiff= CTffpe-Ctff). The DASL platform (cDNA-mediated annealing, selection, extension, and ligation assay) was used together with the whole genome arrays to obtain expression data for 20 818 genes.

2012-05-10 | E-GEOD-34105 | biostudies-arrayexpress

Gene expression profiling of archival tongue carcinoma and normal tongue tissue (subset)

2012-05-11 | GSE34106 | GEO

Gene expression profiling of archival tongue carcinoma and normal tongue tissue (all samples)

2012-05-11 | GSE34105 | GEO

Whole genome DASL analysis of tumour epithelial and stromal compartments during breast cancer progression

Project description:Analysis of gene expression changes in tumour epithelium (DCIS and invasive breast cancer) and stroma both immediately surrounding the lesions and more distantly. Total RNA obtained from Formalin Fixed Paraffin Embedded archival material and the individual compartments (stroma and epithelium) compared independently across the samples. Sample abbreviation key: BC = breast cancer DCIS = ductal carcinoma in situ IDC = invasive ductal carcinoma RM = remote metastasis S = stroma NS = near stroma.

2012-05-10 | E-GEOD-35019 | biostudies-arrayexpress

Gene Expression Profiling of Formalin Fixed Paraffin Embedded Familial Breast Tumours Using the Whole Genome-DASL Assay

Project description:Tissue sample acquisition is a limiting step in many studies. There are many thousands of formalin fixed paraffin embedded archival blocks collected around the world, but in contrast relatively few fresh frozen samples in tumor banks. Once samples are fixed in formalin the RNA is degraded and traditional methods for gene expression profiling are not suitable. In this study we have evaluated the whole genome DASL assay from Illumina to perform transcriptomic analysis from archived breast tumor tissue fixed in formalin paraffin embedded blocks. We profiled 76 familial breast tumors from cases carrying a BRCA1, BRCA2 or ATM mutation, or from non-BRCA1/2 families. We found that replicate samples correlated well with each other (r2=0.9-0.98). In 12/15 cases, the matched formalin-fixed and frozen samples predicted the same tumor molecular subtypes with confidence. These results demonstrate that the whole genome DASL assay is a valuable tool to profile degraded RNA from archival FFPE material. This assay will enable transcriptomic analysis of a large number of archival samples that are stored in pathology archives around the globe and consequently will have the potential to improve our understanding and characterisation of many diseases. RNA was extracted from FFPE Familial breast tumours and analysed using the WG-DASL assay for Illumina.

2010-06-16 | E-GEOD-21921 | biostudies-arrayexpress

Expression profiling of archival tissues for long-term health studies

Project description:Over 20 million archival tissue samples are stored annually in the United States as formalin-fixed, paraffin-embedded (FFPE) tissue blocks, but only recently has whole-genome expression profiling from these samples become technically feasible. Here, we introduce novel general methods for assessing, summarizing, and visualizing expression data quality from archival samples. We validated these methods in technical study of 144 clinical breast cancer and autopsy samples and in an overview of all current publicly available FFPE whole-genome expression data. We additionally performed a case study incorporating over 1,000 colorectal cancer (CRC) samples collected from patients across the United States over a period of more than 25 years, integrating clinicopathological information, tumor molecular data, and archival tissue gene expression on an unparalleled scale. Both large-scale clinical studies presented a much greater range of data quality than previous smaller studies, emphasizing the need for rigorous quality control in translational applications of archival tissue gene expression profiling. This series includes 1,003 FFPE-preserved CRC tumors, assayed by Illumina HumanRef-v3 WG-DASL microarray.

2012-10-02 | E-GEOD-32651 | biostudies-arrayexpress

Homo sapiens

Project description:Gene expression profiling of archival tongue carcinoma and normal tongue tissue (subset)

| PRJNA156489 | ENA

Expression data in human renal cell carcinoma samples from patients who did or did not respond to anti-PD-1 (Nivolumab) immunotherapy

Project description:Pre-treatment tumor expression of PD-L1 has been shown to correlate with favorable clinical outcomes following PD-1 blocking therapies. However, the majority of patients with PD-L1+ tumors do not respond to treatment. With the goal of obtaining insights into the mechanisms underlying the response to anti-PD-1 targeted therapies in patients with renal cell carcinoma (RCC) with positive tumor expression of PD-L1, microarray expression data was obtained for pre-treatment tumors from patients with RCC who did or did not have a positive response to anti-PD-1 (nivolumab) therapy. Insight into these mechanisms may lead to improved rationally designed therapies, and biomarkers for selecting patients who are more likely to benefit from these treatments. Gene expression profiling was performed on total RNA extracted from 11 formalin-fixed paraffin-embedded (FFPE) RCC specimens, 4 of which were from patients who had a positive response (objective tumor regression) to the anti-PD-1 (nivolumab) immunotherapy, and 7 of which were from patients who did not have a response. Details of the design, and the gene signatures found are given in the paper associated with this GEO Series: Maria Libera Ascierto, Tracee L. McMiller, Alan E. Berger, Ludmila Danilova, Robert A. Anders, George J. Netto, Haiying Xu, Theresa S. Pritchard, Jinshui Fan, Chris Cheadle, Leslie Cope, Charles G. Drake, Drew M. Pardoll, Janis M. Taube, and Suzanne L. Topalian, The Intratumoral Balance between Metabolic and Immunologic Gene Expression Is Associated with Antiâ??PD-1 Response in Patients with Renal Cell Carcinoma, published online in Cancer Immunology Research on 4 August 2016, doi: 10.1158/2326-6066.CIR-16-0072 http://cancerimmunolres.aacrjournals.org/content/early/2016/07/28/2326-6066.CIR-16-0072.full.pdf+html

2016-08-04 | E-GEOD-67501 | biostudies-arrayexpress

RNA expression in tongue squamous cell carcinoma, tumour free tongue tissue and control tongue

Project description:Tongue squamous cell carcinoma is a tumour type with rather low five year survival, around 60%. The poor survival rate has been ascribed to late detection, a high frequency of locoregional recurrence, the occurrence of secondary primary tumours and death due to comorbidity. One reason for development of recurrence is thought to be the existence of transformed cells in areas adjacent to the primary tumour, cancerization field effect. The aim of this study was to map the changes in the tumour free tongue tissue adjacent to tongue tumours compared with healthy control tongue tissue to better understand the cancerization field effect. Tissue biopsies were collected from tumour (T) and tumour free tissue adjacent to the tumour (TF) from patients with tongue squamous cell carcinoma. Control tissue was collected from latter border of the tongue of tumour free healthy volunteers (C). All samples were homogenized and RNA was extracted. The RNA was biotin labelled and run on Illumina HT-12 bead chip array.

2016-12-21 | E-MTAB-4678 | biostudies-arrayexpress

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