Ontology highlight
ABSTRACT:
PROVIDER: PRJNA624270 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR11522587.fastq.gz | Fastqsanger.gz | |||
| SRR11522588.fastq.gz | Fastqsanger.gz | |||
| SRR11522589.fastq.gz | Fastqsanger.gz | |||
| SRR11522590.fastq.gz | Fastqsanger.gz | |||
| SRR11522591.fastq.gz | Fastqsanger.gz |
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Project description:We did the microarray to further compare the changes of gene expression between gastric cancer stem cells with CD44 knockdown by lentivirus and gastric cancer stem cells by scamble short hairpin RNA. Gastric cancer stem cells (Lentivirus) were infected with lentivirus that expressed human CD44-speciï¬c short hairpin RNA (shRNA). Control group of gastric cancer stem cells (Vector group) were only infected with scramble shRNA.
2015-12-31 | E-GEOD-58143 | biostudies-arrayexpress
Project description:We did the microarray to further compare the changes of gene expression between gastric cancer stem cells with CD44 knockdown by lentivirus and gastric cancer stem cells by scamble short hairpin RNA.
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Project description:To understand the molecular basis of the acquisition of 5-FU resistance in gastric cancer stem cells, we established 5-FU-resistant gastric cancer organoids. We used microarrays to detail the global program of gene expression underlying 5-FU resistance and maintenance of stem cell properties in gastric cancer.
2020-07-10 | GSE154127 | GEO
Project description:To sum up our results, we managed to isolate a reproducible SP cell fraction of human gastric carcinoma cell lines for the first time. Those cells differed from the rest of the population regarding morphology and biological behaviour. They had the ability to build a population resembling the basic tumor population and therefore performed differenziation and asymmetric cell division. SP cells expressed potential stem cell markers like musashi 1 and Cd133 and also showed a high expression of genes that encode for stem cell properties. The so identified phenotypic and genetic factors showed a variable expression in tumor samples of patient series and might be applicable as prognostic factors in the diagnosis of gastric carcinoma. Aims: The side population (SP) of tumor cell lines shares characteristics with tumor stem cells. In this study we phenotypically and genotypically characterized the SP of gastric cancer cell lines. Methods: The SP was obtained from MKN45- and AGS-gastric cancer cells using Hoechst 33342 staining and fluorescence-activated cell sorting (FACS). SP cells were subsequently studied morphologically (cytology, immunocytochemistry), on the transcriptional level (gene array) and in cell culture (recultivation assays). Genes differentially expressed in the SP cells were finally searched by immunohistochemistry in neoplastic and non-neoplastic gastric tissue from gastric cancer patients. Results: The SP was reproducibly obtained from gastric cancer cell lines. The SP cells were smaller and rounder then non-SP cells. SP cells self-renewed in re-cultivation experiments and differentiated into SP- and non-SP cells. Re-cultivated SP- and non-SP cells showed distinct phenotypes in culture regarding cell shape and colony-formation. SP cells had increased levels of the stem cell markers CD133 and Musashi 1. Transcriptional analyses demonstrated that SP cells express genes that encode for stem cell properties like FZD7, HEY1, SMO and ADAM17. Finally we detected the transcripts of these genes in tissue samples from patients with gastric cancer. Conclusions: Human gastric cancer cell lines enclose a phenotypically and genotypically distinct cell population with tumor stem cell features. Phenotypical characteristics of this distinct cell population are also present in gastric cancer tissue.
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Project description:Doublecortin-like kinase 1 (DCLK1) is a putative cancer stem cell marker, a promising diagnostic and prognostic maker for malignant tumors and a proposed driver gene for gastric cancer. Here we show that DCLK1 expression in the gastric cancer cell line MKN1 impacts EV biogenesis both quantitatively and qualitatively in a kinase dependent manner, revealing a hitherto unknown role for this putative oncogenic kinase. Importantly, the proteome of EVs isolated from DCLK1 expressing gastric cancer cells is enriched for proteins involved in tumor-promoting biological processes, raising the prospect of establishing DCLK1 as a novel anti-cancer target.
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Project description:Because cancer stem cells already had genetic and epigenetic alterations which can affect the self-renewal, we tried to characterize genetic and epigenetic changes of the gastric cancer stem cells. To do this, we performed SNP array, MBD sequencing and RNA sequencing.
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2013-09-01 | E-GEOD-40634 | biostudies-arrayexpress
Project description:Because gastric cancer cells already had genetic and epigenetic alterations which can affect the gastric carcinogenesis, we tried to characterize genetic and epigenetic changes during gastric carcinogenesis. To do this, we performed MBD sequencing and RRBS sequencing. MBD and RRBS sequencing of gastric mucosa, intestinal metaplasia, and gastric cancer cells from one patient were generated by NGS using Illumina GAII.
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