Project description:Copy number profiling of MKN45T 5-FU resistant gastric cancer cell lines and its parental cell line MKN45. We hypothesized that a detailed fine-scale survey of genomic CNAs might reveal the mechanism for acquired resistant to 5-FU in gastric cancer.
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.
Project description:The genomic loci with copy number alterations are known to harbor cancer genes. We investigated a comprehensive panel of gastric cancer cell lines for their genome-wide copy number alterations. Eighteen gastric cancer cell lines were profiled using Affymetrix 500K SNP arrays. For copy number calculation, seven independent normal blood samples were profiled together. The copy numbers were calculated genome-wide, in these cell lines with high resolution and reveal the cell line specific amplification and copy number changes.
Project description:In this study, we established a successive xenograft model to enrich Epstein-Barr virus-associated gastric carcinoma (EBVaGC) cancer stem cells (CSCs) through long-term treatment of EBVaGC cell line SNU719 with 5-Fluorouraci (5-Fu) in mice vivo passage. Simply, NOD/SCID mice injected in the subcutaneous with SNU719 were treated with 5-Fu weekly until xenografts reached 1.5 cm diameter and the mice were euthanizedand single-cell suspensions were obtainedby collagenasedigestion. Then the purified cells were passaged in 5-Fu-treated NOD/SCID mice as above. After four successive generations,we obtained theSNU-4th cells from the fourth passage xenografts treated with 5-Fu. Compared with parental SNU719 cells, SNU-4th cells possessed the stemness characters. Increasing evidence have proved that circular RNA (circRNA) play an important role in maintaining the tumor phenotype. So, we compared circRNAs expression between the fourth passage xenografts treated with 5-Fu and PBS by RNA-sequencing, hoping to find out which circRNAs were involved in the stemness regulation of EBVaGC. we established a highly malignant EBVaGC cell line SNU-4th through long-term treatment of EBVaGC cell line SNU719 with 5-Fluorouraci in vivo passage, then we compared circRNAs expression between the fourth passage xenografts treated with 5-Fu and PBS by RNA-sequencing
Project description:Copy number analysis to compare parental colorectal cancer cell lines and their selumetinib-resistant derivatives and identify gene copy changes that might contribute to resistance
Project description:Cisplatin is the first-line agent utilized for the clinical treatment of a wide variety of solid tumors including gastric cancer. However, the intrinsic or acquired cisplatin resistance is often occurred in patients with gastric cancer and resulted in failure of cisplatin therapy. In order to investigate if miRNA involves in cisplatin resistance of human gastric cancer, we first screened and compared the expression of miRNAs between cisplatin resistant gastric cancer cell lines SGC-7901/DDP and BGC-823/DDP and their sensitive parental cells by miRNAs microarray.
Project description:RNA-seq of SH-SY5Y NB cells stably transduced with shETV5 compared to parental cells, cell line samples and samples of xenografted tumors
