Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1008377 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR25736958_1.fastq.gz | Fastqsanger.gz | |||
| SRR25736958_2.fastq.gz | Fastqsanger.gz | |||
| SRR25736959_1.fastq.gz | Fastqsanger.gz | |||
| SRR25736959_2.fastq.gz | Fastqsanger.gz | |||
| SRR25736960_1.fastq.gz | Fastqsanger.gz |
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Project description:Persistent infection by high-risk human papillomaviruses (HPVs) is associated with the development of cervical cancer and a subset of anogenital and head and neck squamous cell carcinomas. Abnormal expression of cellular microRNAs (miRNAs) plays an important role in the development of cancer, including HPV-related tumors. MiRNA expression profile was investigated by microrray analysis in the HPV-positive cervical cancer cell lines SiHa (HPV16-positive cell line derived from a cervical squamous cell carcinoma), CaSki (HPV16-positive cell line derived from a metastatic cervical epidermoid carcinoma), and HeLa (HPV18-positive cell line derived from a cervical adenocarcinoma) and compared with primary HFKs and C33a (HPV-negative cervical cell line).
2018-01-16 | E-MTAB-6361 | biostudies-arrayexpress
Project description:Galectin-7 expression was found to be strongly reduced in cervical cancer cell lines. The same tumor cell lines in which Galectin-7 was ectopically expressed exhibited significant decrease in their tumorigenic capacity in vitro and in vivo. The proteomic changes in the cervical cancer cell lines HeLa and SiHa after Galectin-7 re-expression were here quantified by SILAC.
2017-04-01 | MSV000080855 | MassIVE
Project description:Galectin-7 expression was found to be strongly reduced in cervical cancer cell lines. The same tumor cell lines in which Galectin-7 was ectopically expressed exhibited significant decrease in their tumorigenic capacity in vitro and in vivo. The proteomic changes in the cervical cancer cell lines HeLa and SiHa after Galectin-7 re-expression were here quantified by SILAC.
2016-09-28 | PXD001806 | Pride
Project description:Five human cervical cancer cell lines (HeLa, CaSki, SiHa, C-33A, SW756) and one human normal cervical epithelial cell line HcerEpic were included in the study. Microarray based circRNA expression profiles were acquired using the Arraystar Human circRNA Array (8x15K, Arraystar). We identified circRNAs differentially expressed in human cervical cancer cell lines compared to human normal cervical epithelial HcerEpic cells (control).
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Project description:In order to study the molecular mechanism of HPV18 carcinogenesis, we used conditional reprogramming technique to culture normal cervical epithelial cells, cervical intraepithelial Neoplasia HPV18 cells and patient-derived cervical cancer cell lines for 24 h and stimulated with estradiol for 24 h,and collected total RNA samples for mRNA sequencing (RNA-SEQ). Then, Gene expression profiling was performed using RNA-seq data from six groups of cells.
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Project description:Promoter methylation profiles are proposed as potential prognosis and/or diagnosis biomarkers in cervical cancer. Up to now, little is known about the promoter methylation profile and expression pattern of stem cell (SC) markers during tumor development. In this study, we were interested to identify SC genes methylation profiles during cervical carcinogenesis. A genome-wide promoter methylation screening revealed a strong hypermethylation of Undifferentiated cell Transcription Factor 1 (UTF1) promoter in cervical cancer in comparison with normal ectocervix. By direct bisulfite pyrosequencing of DNA isolated from liquid-based cytological samples, we showed that UTF1 promoter methylation increases with lesion severity, the highest level of methylation being found in carcinoma. This hypermethylation was associated with increased UTF1 mRNA and protein expression. By using quantitative RT-PCR and Western Blot, we showed that both UTF1 mRNA and protein are present in epithelial cancer cell lines, even in the absence of its two main described regulators Oct4A and Sox2. Moreover, by immunofluorescence, we confirmed the nuclear localisation of UTF1 in cell lines. Surprisingly, direct bisulfite pyrosequencing revealed that the inhibition of DNA methyltransferase by 5-aza-2'-deoxycytidine was associated with decreased UTF1 gene methylation and expression in two cervical cancer cell lines of the four tested. These findings strongly suggest that UTF1 promoter methylation profile might be a useful biomarker for cervical cancer diagnosis and raise the questions of its role during epithelial carcinogenesis and of the mechanisms regulating its expression. *Mouallif M and Guenin S contributed equally to this work
2012-03-21 | GSE36637 | GEO
Project description:Attempts to develop a therapeutic vaccine against human papillomavirus (HPV)-induced malignancies have not been clinically successful to date. One reason may be the hypoxic microenvironment present in most tumors, including cervical cancer. Hypoxia dysregulates the levels of human leukocyte antigen (HLA) class I molecules in different tumor entities, impacts function of cytotoxic T cells, and leads to decreased protein levels of the oncoproteins E6 and E7 in HPV-transformed cells. Therefore, we investigated the effect of hypoxia on the presentation of HPV16 E6- and E7-derived epitopes in cervical cancer cells and its effect on epitope-specific T cell cytotoxicity. Hypoxia induced downregulation of E7 protein levels in all analyzed cell lines, as assessed by Western blotting. However, contrary to previous reports, no perturbation of antigen presentation machinery (APM) components and HLA-A2 surface expression upon hypoxia treatment was detected by mass spectrometry and flow cytometry, respectively. Cytotoxicity assays performed in hypoxic conditions showed differential effects on the specific killing of HPV16-positive cervical cancer cells by epitope-specific CD8+ T cell lines in a donor- and peptide-specific manner. Effects of hypoxia on the expression of PD-L1 were ruled out by flow cytometry analysis. Altogether, our results suggest an intact APM, and cytotoxicity despite the decreased expression of E6 and E7, suggesting that successful immunotherapies can be developed for HPV-induced cervical cancer, especially if combined with hypoxia-alleviating measures.
2022-11-16 | PXD032217 | Pride
Project description:This study assessed the transcriptional profile of SiHa cells. SiHa is a cervical cancer cell line with integrated HPV16, and was used as a model to study human gene expression in the context of integrated virus. Gene expression in SiHa, calculated by Cufflinks, was scored in windows around the locations of known viral integrations in patients or cell lines to determine if there was an association between gene expression and viral integration. We found that SiHa gene expression was higher near loci of integration for HPV18 vs. HPV16, cervical tissues vs. head and neck cancers, and cervical cancers vs. in vitro integrations. This study provides insight into the factors that may influence where viruses integrate in the human genome.
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