Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Time dependent changes of gene expression in surgical specimen of colorectal cancer

ABSTRACT: To investigate time-dependent changes the comprehensive gene expressions in colorectal normal and tumor surgical specimen within two hours.

ORGANISM(S): Homo sapiens

PROVIDER: GSE50746 | GEO | 2013/09/11

SECONDARY ACCESSION(S): PRJNA218630

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Time dependent changes of gene expression in surgical specimen of colorectal cancer

Project description:To investigate time-dependent changes the comprehensive gene expressions in colorectal normal and tumor surgical specimen within two hours. Both normal and tumor tissues were extracted at 0, 30, 60, 120 min after surgical removal in seven patients with locally advanced colorectal cancer and stabilized. RNA was extracted and calculated, time dependent changes of gene expression were examined by microarray data.

2013-09-11 | E-GEOD-50746 | biostudies-arrayexpress

Solo specimen

Project description:Solo specimen Raw sequence reads

| PRJNA1114439 | ENA

Escherichia coli strain:urine specimen | isolate:urine specimen

Project description:Escherichia coli strain:urine specimen | isolate:urine specimen Genome sequencing

| PRJNA1067845 | ENA

Enterobacter cloacae strain:clinical specimen | isolate:clinical specimen

Project description:Enterobacter cloacae strain:clinical specimen | isolate:clinical specimen Genome sequencing

| PRJNA341281 | ENA

Escherichia coli strain:urine specimen | isolate:urine specimen

Project description:Escherichia coli strain:urine specimen | isolate:urine specimen Genome sequencing

| PRJNA1067855 | ENA

Quantitative proteomics reveals that distant recurrence-associated protein R-Ras and Transgelin predict post-surgical survival of colorectal cancer Stage III patients

Project description:Surgical resection is the major clinical intervention for Stage III colorectal cancer (CRC) currently. However, as much as 30.8% of the patients who had ever taken curative resection came out of recurrence eventually. Therefore, to facilitate formulating effective treatment plans, there is an intense demand for Stage III CRC post-surgical prognostic biomarkers. In this study, we identified total 146 differentially expressed proteins (DEPs) associated with poor prognosis in Stage III CRC patients with TMT-based quantitative mass spectrometry (MS). In these DEPs, the protein expression level of R-Ras and Transgelin were tested with immunohistochemistry (IHC) of 192 individual specimens. Further Kaplan-Meier analysis revealed that the level of R-Ras and Transgelin is associated with patients’ 5-year overall survival (OS) and disease-free survival (DFS) significantly, and multivariate Cox-regression analyses revealed that R-Ras and Transgelin are independent prognostic factors for OS and DFS respectively. In conclusion, our study presents that R-Ras and Transgelin are potential post-surgical prognostic biomarkers of Stage III CRC.

2016-06-20 | PXD002903 | Pride

Carcinoma-associated fibroblasts’ transcriptomic program predicts clinical outcome in stage II/III colorectal cancer

Project description:We obtained fibroblast cultures from fresh surgical specimen ressected from patients with primary colorectal carcinoma: normal colonic fibroblasts (NCF=9) from the normal colonic mucosa at least 5-10cm from the surgical margin, carcinoma-associated fibroblasts from the primary tumor (CAF-PT=14) and carcinoma-associated fibroblasts (CAF-LM=11) from fresh surgical specimens of liver metastases. We identified 277 probes, in common between the three types of fibroblasts, whose expression level is sequentially deregulated according to cancer progression (NCF→CAF-PT→CAF-LM; fold change Log2 normalized expression>1.5 in each step). Prediction Analysis of Microarrays was applied to obtain a 25-gene signature that better characterizes each fibroblast class. The signature is able to classify patients carrying primary tumors according to prognosis. This fact was exploited to obtain a 19-gene signature (from the 277 deregulated probes) predicting recurrence with high accuracy in stage II/III colorectal cancer patients. Signature validation has been carried out in two independent datasets and in a meta-cohort of 336 stage II/III patients. Since the 25-gene signature was obtained regardless of gene expression data of tumor specimens or patient’s clinical data, the prognostic power of this signature provides strong evidence of the link between the tumor stroma and cancer progression. Furthermore, the 19-gene signature was able to identify low-risk patients with very high accuracy, especially relevant for those high-risk stage-II patients. We hybridised fibroblast RNA in Affymetrix GeneChip 1.0 st arrays

2013-05-10 | E-GEOD-46824 | biostudies-arrayexpress

Time-dependent changes in placental mRNA expression after delivery due to delayed specimen collection.

Project description:ProblemCurrent scientific guidelines recommend collecting placental specimens within two hours of delivery for gene expression analysis. However, collecting samples in a narrow time window is a challenge in the dynamic and unpredictable clinical setting, so delays in placental specimen collection are possible. The purpose of our analysis was to investigate temporal changes in placental gene expression by longitudinally sampling placentas over a 24 h period.Method of studyEight placentas from individuals with uncomplicated, term pregnancies delivered by scheduled cesarean section were collected and sampled following the placental delivery and again at 1, 2, 4, 6, and 24 h post-delivery. At each time point, biopsies of chorionic villous tissue were taken from 3 cotyledons to account for intra-placental heterogeneity. The 3 biopsies from each time point were pooled prior to RNA extraction. Expression of 382 mRNA transcripts was quantified using the NanoString nCounter System. Fold change values were calculated for each time point relative to delivery, and a fold change threshold of 1.25 was used to determine a meaningful change from delivery.ResultsBased on a fold change threshold of 1.25, 84.3% of transcripts were stable for at least 1 h, 80.2% were stable for at least two hours, and 20.6% of transcripts were stable through the collection at 24 h.ConclusionOur results suggest that for some mRNA transcripts, expression changes as time to sample collection increases. We have developed a Web application to allow investigators to explore transcripts relevant to their research interests and to set appropriate thresholds to aid in determining whether placentas with delayed sample collection can be included in analyses (https://placentaexpression.foundationsofhealth.org/).

| S-EPMC8464485 | biostudies-literature

Differential Effect of Surgical Manipulation on Gene Expression in Normal Breast Tissue and Breast Tumour Tissue

Project description:Gene expression profiling is a promising diagnostic and prognostic tool. Expression profiles are snap-shots of mRNA levels at time of extraction and they have been shown to be affected by tissue handling during sample collection. The effect of cold (room temperature) ischemia in the time interval between surgical removal of the specimen and freezing has been described in a number of studies. However, not much is known about the effect of warm (body temperature) ischemia during surgery.

2018-11-21 | GSE71053 | GEO

Carcinoma-associated fibroblasts’ transcriptomic program predicts clinical outcome in stage II/III colorectal cancer

2013-05-10 | GSE46824 | GEO