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Expression analysis of platinum sensitive and resistant epithelial ovarian cancer patient samples.

ABSTRACT: Expression analysis of platinum sensitive and resistant epithelial ovarian cancer patient samples.

PROVIDER: PRJNA470544 | ENA |

REPOSITORIES: ENA

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Expression analysis of platinum sensitive and resistant epithelial ovarian cancer patient samples.

Project description:The objective of this work was to identify potential cancer biomarkers by analyzing microarray and protein expression data from platinum-sensitive and -resistant ovarian cancer patient samples. The gene expression profiles of the samples were ompared based on platinum sensitivity status and PARP levels.

2018-05-09 | GSE114206 | GEO

Genome-wide mapping of H3K27ac and H3K9ac in platinum sensitive and resistant epithelial ovarian cancer cell lines

Project description:ChIP-seq for H3K27ac or H3K9ac was performed in different platinum sensitive and resistant epithelial ovarian cancer cell lines and in sensitive A2780 cells with shRNA induced knockdown of MBD3.

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Molecular profiling of ovarian carcinoma platinum-sensitive and -resistant cell lines (microRNAs)

Project description:Resistance to platinum compounds represents a major obstacle to the cure of ovarian carcinoma. The molecular profiling of drug-sensitive and drug-resistant cells may be helpful to clarify if altered expression of miRNAs can contribute to the drug-resistant phenotype. The expression pattern of miRNAs of three ovarian carcinoma cell lines was examined. The analysis revealed the modulation of several miRNAs in the two platinum-resistant cell lines as compared to parental platinum-sensitive cells. The integration of the information obtained through miRNA expression analysis may be useful to clarify the specific molecular alterations of factors and pathway favouring survival of tumor cells.

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Molecular profiling of ovarian carcinoma platinum-sensitive and -resistant cell lines (gene expression)

Project description:Resistance to platinum compounds represents a major obstacle to the cure of ovarian carcinoma. The molecular profiling of drug-sensitive and drug-resistant cells may be helpful to clarify if altered gene expression can contribute to the drug-resistant phenotype. The expression pattern of three ovarian carcinoma cell lines was examined. The analysis revealed the modulation of several genes in the two platinum-resistant cell lines as compared to parental platinum-sensitive cells. The integration of the information obtained through gene expression analysis may be useful to clarify the specific molecular alterations of factors and pathway favouring survival of tumor cells.

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RNA-Seq of treatment response of platinum sensitive and platinum resistant ovarian cancer cells

Project description:Resistance to platinum-based chemotherapy is a clinical challenge in the treatment of ovarian cancer (OC) and limits survival. Therefore, innovative drugs against platinum-resistance are urgently needed. Our therapeutic concept is based on the conjugation of two chemotherapeutic compounds to a monotherapeutic pro-drug, which is taken up by cancer cells and cleaved into active cytostatic metabolites. Here, we explore the activity of the duplex-prodrug 5-FdU-ECyd, covalently linking 2'-deoxy-5-fluorouridine (5-FdU) and 3'-C-ethynylcytidine (ECyd), on platinum-resistant OC cells. RNA-Sequencing was used for characterization of 5-FdU-ECyd treated platinum-sensitive A2780 and isogenic platinum-resistant A2780cis.

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Transcriptional profiling of platinum sensitive and platinum resistant high grade serous ovarian cancer samples

Project description:This study aims at correlating changes in the transcriptional state in high grade serous epithelial ovarian cancer (HGS-EOC) to the response to therapy, in particular the insurgence of resistance to platinum-based treatment.

2020-02-11 | E-MTAB-7083 | biostudies-arrayexpress

microRNA profiling of platinum sensitive and platinum resistant high grade serous ovarian cancer samples

Project description:This study aims at correlating changes in the microRNA state in high grade serous epithelial ovarian cancer (HGS-EOC) to the response to therapy, in particular the insurgence of resistance to platinum-based treatment.

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Project description:Platinum resistance is a major drawback in the treatment of ovarian cancer. Evidence suggests that microRNAs are key players in the initiation, progression, and drug resistance of cancer cells. However, the precise miRNAs dysregulated and contributing to platinum resistance in ovarian cancer cells have not been fully elucidated. Here, we conducted a miRNA expression profiling of cisplatin-sensitive (A2780) and cisplatin-resistant (CP20 and CIS) ovarian cancer cells to identify potential miRNAs involved in platinum resistance.

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Project description:IGFBP6 is a secreted protein with a controversial role in human malignancies, being downregulated in the majority of human cancers, but upregulated in selected tumors. Ovarian carcinoma (OC) is a human malignancy characterized by IGFBP6 downregulation, even though the significance of its low expression during ovarian carcinogenesis is still poorly understood. IGFBP6 expression levels and the activation of its signaling pathway were evaluated in two matched OC cell lines derived from a high-grade serous ovarian cancer before and after platinum resistance (PEA1 and PEA2 cells,respectively). A whole genome gene expression analysis was comparatively performed in both cell lines upon IGFBP6 stimulation by Illumina technology. IGFBP6 gene expression in human OCs data were obtained from public datasets. Gene expression data from public datasets confirmed the downregulation of IGFBP6 from normal ovarian tissues to primary and metastatic OCs. The comparative analysis of platinum-sensitive (PEA1) and platinum-resistant (PEA2) cell lines showed quantitative and qualitative differences in the activation of IGFBP6 signaling. Indeed, IGFBP6 enhanced ERK1/2 phosphorylation only in PEA1 cells and induced a more evident and significant gene expression reprogramming in PEA1 compared to PEA2 cells. Furthermore, the analysis of selected genes modulated by IGFBP6 (i.e., FOS, JUN, TNF, IL6, IL8, and EGR1) showed an inverse regulation in PEA1 versus PEA2 cells, as well as selected hallmarks and IL-6 signaling were ositively regulated in PEA1, while inhibited in PEA2 cells.These data suggest that loss of IGFBP6 signaling may play a role in ovarian cancer progression, being likely associated to the development of platinum resistance.

2022-03-23 | GSE189717 | GEO

Identification of transcriptional difference between platinum-sensitive and resistant patients with ovarian cancer (OV)

Project description:Purpose: The goals of this study are to characterize the transcriptional dysregulation of OV. More importantly, the transcriptome differences betweeen platinum-sensitive and resistant patients are compared to identify RNAs that may impact platinum resistance. Methods: High-throughput RNA sequencing (RNA-seq) was employed to capture the transcriptional changes in OV compared to normal samples. StringTie was used to quantify gene expression and DESeq2 was utilized to compared expression changes between different sample groups.

2023-11-01 | GSE160626 | GEO

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