Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Mus musculus

ABSTRACT: Dose-Response Analysis of RNA-Seq Profiles in Archival Formalin-Fixed Paraffin-Embedded (FFPE) Samples

PROVIDER: PRJNA314506 | ENA |

REPOSITORIES: ENA

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
	SRR3208670_1.fastq.gz	Fastqsanger.gz
	SRR3208670_2.fastq.gz	Fastqsanger.gz
	SRR3208680_1.fastq.gz	Fastqsanger.gz
	SRR3208680_2.fastq.gz	Fastqsanger.gz
	SRR3208690_1.fastq.gz	Fastqsanger.gz

Items per page:

1 - 5 of 160

Similar Datasets

Single-cell RNA sequencing of breast cancer cells from fresh fixed (FF) and formalin-fixed paraffin-embedded (FFPE) tissue identified multi-ciliary cells

Project description:This study evaluates the feasibility of using formalin-fixed paraffin-embedded (FFPE) and fixed fresh (FF) breast carcinoma samples for single-cell RNA sequencing (scRNAseq), highlighting the potential of archival FFPE tissues in clinical research and retrospective studies.

2025-02-19 | GSE278793 | GEO

Clinical relevance of DNA microarray analyses using archival formalin-fixed paraffin-embedded breast cancer specimens

Project description:This SuperSeries is composed of the following subset Series: GSE23384: Gene profiling using archival formalin-fixed paraffin-embedded breast cancer specimens can generate informative microarray data: A comparison with matched fresh fine needle aspiration biopsy samples (FFPE samples) GSE23385: Gene profiling using archival formalin-fixed paraffin-embedded breast cancer specimens can generate informative microarray data: A comparison with matched fresh fine needle aspiration biopsy samples (FNA samples) Refer to individual Series

2011-06-22 | E-GEOD-23386 | biostudies-arrayexpress

Direct Formalin Fixation Induces Widespread Transcriptomic Effects in Archival Tissue Samples

Project description:Archival formalin-fixed paraffin-embedded (FFPE) tissue samples hold a wealth of transcriptomic information; however, little is known about potential artifacts. Previously, we identified a consistent shift in global RNA-sequencing profiles between matching frozen and FFPE samples. We hypothesized that this shift was from fixing fresh tissue in formalin. To test this idea, RNA-sequencing was performed on liver samples collected from male mice treated with 600 ppm of a reference chemical (phenobarbital, 600 ppm phenobarbital) or vehicle control for 7 days. Samples were divided into: (1) fresh-frozen (FR); (2) directly fixed in 10% buffered formalin for 18 hours followed by paraffin embedding (FFPE); (3) frozen then fixed as FFPE (FR>FFPE); or (4) frozen then fixed in 70% ethanol followed by paraffin embedding (FR>OH) (n=6/group/condition). Direct fixation resulted in 2946 differentially expressed genes (DEGs), 98% of which were down-regulated. Freezing prior to fixation resulted in ≥95% fewer DEGs vs. FR, indicating that most formalin-derived transcriptional effects occurred with fixation. This was supported by follow-up studies, which identified consistent enrichment in oxidative stress, mitochondrial dysfunction, and transcription elongation pathways with formalin fixation. Notably, formalin fixation in the parent study did not significantly impact chemical response profiles, which were consistent with CAR/PXR activation and 600 ppm phenobarbital exposure. Our results demonstrate distinct transcriptional effects of formalin fixation that could impact gene expression studies using FFPE samples.

2020-09-08 | GSE148174 | GEO

3’ MACE RNA-Sequencing allows for Transcriptome Profiling in Long-Term Stored Human Tissue Samples

Project description:This study aims to compare the potential of standard RNA-sequencing (RNA-Seq) and 3’ massive analysis of c-DNA ends (MACE) RNA-sequencing for the analysis of fresh tissue and describes transcriptome profiling of formalin-fixed paraffin-embedded (FFPE) archival human samples by MACE.

2020-06-15 | GSE149004 | GEO

Spatial profiling of chromatin accessibility in formalin-fixed paraffin-embedded tissues

Project description:Despite the extensive collection of formalin-fixed paraffin-embedded (FFPE) specimens, molecular tools for their in-depth analysis remain limited. Here, we introduce spatial FFPE-ATAC-seq, a technique that enables chromatin accessibility profiling in archival FFPE tissues with spatial resolution. Applied to both human and mouse samples, this method revealed the complex spatial organization and distinct cellular architectures, unlocking the potential of FFPE samples for comprehensive epigenomic studies and human disease research.

2025-05-19 | GSE278007 | GEO

Detection of chromosomal aberrations in renal tumors by virtual karyotyping with SNP microarrays

Project description:Renal epithelial neoplasms have characteristic chromosomal imbalances that can be used for classification. We have previously shown that virtual karyotypes (v-karyotype) derived from SNP microarrays can be performed on formalin-fixed paraffin embedded (FFPE) tissue samples but a direct comparison with karyotypes obtained by conventional cytogenetics has not been done. 20 archival FFPE tumor samples were analyzed with Affymetrix 10K 2.0 or 250K Nsp SNP microarrays.

2009-02-19 | GSE12808 | GEO

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.

2010-06-09 | GSE21921 | GEO

Methylomic profiling of melanoma tissues from patients prior to immune checkpoint blockade to identify predictors of response or resistance

Project description:Genome wide DNA methylation profiling of formalin-fixed paraffin-embedded (FFPE) melanoma tissue samples from patients prior to treatment with anti-PD1 immune checkpoint inhibitor therapy. The MethylationEPIC v1.0 BeadChip array was used to obtain DNA methylation profiles across approximately 850,000 CpGs in bisulfite treated DNAs extracted from formalin-fixed paraffin embedded melanoma tissues prior to treatment with anti-PD1 immune checkpoint inhibitor therapy.

2025-04-15 | GSE264158 | GEO

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

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

Dose-Response Analysis of RNA-Seq Profiles in Archival Formalin-Fixed Paraffin-Embedded (FFPE) Samples

Project description:Use of archival resources has been limited to date by inconsistent methods for genomic profiling of degraded RNA from formalin-fixed paraffin-embedded (FFPE) samples. RNA-seq offers a novel way to address this problem. In this study we evaluated transcriptomic dose responses using RNA-seq in paired FFPE and frozen (FROZ) samples from two archival studies in mice, one recent (<2 years old) and the other older (>20 years old). Experimental treatments included di(2-ethylhexyl)phthalate (DEHP) and dichloroacetic acid (DCA) for the <2 and >20 year-old studies, respectively. Total RNA was ribodepleted and sequenced using the Illumina HiSeq platform. In the recent study, FFPE samples showed high concordance in total reads (98% vs FROZ), fold-change values of differentially expressed genes (DEGs) (R2 = 0.99), highly enriched target pathways (90% overlap with FROZ), and benchmark dose estimates for preselected target genes (-2% overall vs FROZ). In contrast, RNA-seq data from older FFPE samples had lower total reads (70% vs FROZ) and poor concordance in global DEGs and pathways. Despite a 99% loss of counts, dose responses were still evident for target genes in FFPE samples and positively correlated with paired FROZ samples. These findings highlight potential variability in the quality of RNA-seq data from FFPE samples. More recent FFPE samples were highly similar to FROZ samples in sequencing quality metrics, DEG profiles, and dose-response parameters, while further methods development is needed for older or lower-quality FFPE samples. This work should help broaden the use of archival resources in both chemical safety and translational science.

2016-08-30 | GSE78962 | 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