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Identification of the possible molecules by which acquired platinum resistance induces EMT-like changes in urothelial carcinoma

ABSTRACT: To identify the possible targets in EMT-acquisition after developing acquired platinum resistance in urothelial carcinoma (UC), we examined the changes in global gene expression before and after development of acquired platinum resistance. Comparing two types of acquired platinum resistant UC cells and their corresponding parent cells, in the end we identified 49 genes (25 up-regulated and 24 down-regulated genes) which were commonly changed in two acquired platinum resistant UC cells.

ORGANISM(S): Homo sapiens

PROVIDER: GSE58624 | GEO | 2016/07/01

SECONDARY ACCESSION(S): PRJNA253036

REPOSITORIES: GEO

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Identification of the possible molecules by which acquired platinum resistance induces EMT-like changes in urothelial carcinoma

Project description:To identify the possible targets in EMT-acquisition after developing acquired platinum resistance in urothelial carcinoma (UC), we examined the changes in global gene expression before and after development of acquired platinum resistance. Comparing two types of acquired platinum resistant UC cells and their corresponding parent cells, in the end we identified 49 genes (25 up-regulated and 24 down-regulated genes) which were commonly changed in two acquired platinum resistant UC cells. Four invasive UC cell lines, T24, 5637, and those acquired platinum-resistant sublines T24PR and 5637PR, were used for microarrays. T24PR and 5637PR cells were newly established in our laboratory, which were grown and passaged upon reaching confluence in medium containing CDDP over a 6-month period. In preliminary studies, we found that these cell lines had an altered phenotype with morphologic and molecular changes consistent with EMT, and exhibited a marked difference in migratory potential before and after developing platinum resistance.

2016-07-01 | E-GEOD-58624 | biostudies-arrayexpress

Clonal Evolution of Platinum-Resistant Metastatic Urothelial Cancer

Project description:<p>Using whole-exome sequencing of urothelial carcinoma samples including matched sets of primary and locally recurrent or metastatic UC tumors collected over time and space and an in-depth analysis of tumors from two rapid autopsies, we provide the first detailed analysis of the therapy-driven clonal evolution of platinum-resistant urothelial carcinoma.</p> <p>We performed a systematic and integrated analyses for the molecular characterization of high-grade upper tract urothelial carcinomas (UTUC) using the whole-exome and mRNA sequencing. </p>

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Clonal evolution of platinum resistant urothelial carcinoma

Project description:Clonal evolution of platinum resistant urothelial carcinoma

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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.

2018-02-22 | GSE98230 | GEO

proteomic landscape of urothelial tumor

Project description:Inverted papilloma (IP) of the urinary bladder is a relatively rare neoplasm that accounts for < 1% of bladder tumor. Although generally accepted as a benign lesion, occasional reports of IP admixed with urothelial carcinoma (UC) or IP patients with synchronous or metachronous UC have raised a concern in the biologic potential of IP.

2022-05-20 | PXD027602 | Pride

Genomic basis for clinical response to histone deacetylase inhibition in advanced urothelial carcinoma

Project description:Abstract Background: Histone deacetylase (HDAC) inhibition has shown some efficacy in urothelial carcinoma (UC); the genomic basis for clinical response is not known. Methods: In two separate phase I clinical trials testing HDAC inhibitors in advanced solid tumors, we identified one patient with advanced UC who had a complete response (CR) to belinostat and one with advanced UC who had a partial response (PR) to panobinostat. The archived tumor of the responders was genomically characterized and studied in comparison to others with UC, in the context of their response to HDAC inhibition on trial. UC cell lines treated with panobinostat were studied to elucidate the mechanisms of benefit. Results: The two patients who responded to HDAC inhibition had ARID1A and FANCD2 mutations. The patient who had a CR to HDAC inhibition had the highest tumor mutational burden of all tumors. Corroborating the basis of sensitivity, transcriptional profiling of platinum resistant ARID1A mutated HT1197 cells treated with panobinostat revealed downregulation of cyto-proliferative and DNA repair gene sets and upregulation of inflammatory gene sets. Conclusions: Clinical efficacy of HDAC inhibition in UC may be dependent on overlapping SWI/SNF pathway mutations and DNA repair defects. Tumor mutational burden may predict the depth and duration of benefit.

2018-10-31 | GSE103928 | GEO

Cisplatin resistance driver gene CLSPN product is a target for immunotherapy in urothelial carcinoma.

Project description:Bladder cancer is a major and mortal disease in urological area. Cisplatin is a key drug for bladder cancer especially for muscle invasive cases. In most cases of bladder cancer, cisplatin is effective; however, resistance to cisplatin is critical for patient’s prognosis. Thus, treatment strategy for cisplatin resistant bladder cancer is essential to improve current prognosis. In this study, we established cisplatin resistant bladder cancer line (CR cells) using a urothelial carcinoma line UM-UC-3 cells. We screened potential targets for CR cells and found that claspin is overexpressed in CR cells. Claspin mRNA knockdown revealed that claspin has a role in cisplatin resistance in CR cells. In our previous study, we found HLA-A*02:01-restricted CLSPN peptide by an HLA ligandome analysis. We thus generated CLSPN peptide specific CTL clone and found that CLSPN peptide-specific CTL clone recognized CR cells at higher levels compared with that of UM-UC-3 wild type cells. These findings indicate that claspin is a driver for cisplatin resistance and claspin peptide-specific immunotherapy is effective for cisplatin resistant cases.

2024-04-10 | GSE217413 | GEO

Unexpected roles of ATP11B in platinum resistance

Project description:Platinum compounds display clinical activity against a wide variety of solid tumors. However, resistance to these agents is a major limitation in cancer therapy. Reduced platinum uptake and increased platinum export are examples of resistance mechanisms that limit the extent of DNA damage. Here, we report the discovery and characterization of the role of ATP11B, a P-type ATPase membrane protein, in cisplatin resistance. ATP11B gene silencing restored the sensitivity of ovarian cancer cell lines to cisplatin in vitro. Combined therapy of cisplatin and ATP11B-siRNA significantly decreased cancer growth in mice bearing ovarian tumors derived from cisplatin-sensitive and -resistant cells. In vitro mechanistic studies on cellular platinum content and cisplatin efflux-kinetics indicated that ATP11B enhances the export of cisplatin from cells. The co-localization of ATP11B with fluorescent cisplatin and with vesicular trafficking proteins such as syntaxin-6 (STX6) and vesicular associated membrane protein 4 (VAMP4) strongly suggests that ATP11B contributes to secretory vesicular transport of cisplatin from Golgi to plasma membrane. In conclusion, silencing ATP11B expression might be a therapeutic strategy to overcome cisplatin resistance. We performed the transfection of control-siRNA and ATP11B-siRNA to both cisplatin-sensitive A2780-PAR and cisplatin-resistant A2780-CP20 cells respectively.

2013-01-23 | E-GEOD-43694 | biostudies-arrayexpress

DNA copy number gain at 1q23.3 is associated with poor survival in metastatic bladder cancer [Agilent]

Project description:Metastatic urothelial carcinoma (UC) of the bladder is associated with multiple somatic copy number alterations (SCNAs). We evaluated SCNAs to identify predictors of poor survival in patients with metastatic UC treated with platinum chemotherapy.

2013-07-07 | GSE39281 | GEO

DNA copy number gain at 1q23.3 is associated with poor survival in metastatic bladder cancer [Affymetrix]

2013-07-07 | GSE39280 | GEO

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