Project description:The aim of this study was to determine how gene expression is changed after arsenite-induced malignant transformation of prostate epithelial cells. Gene expression from three distinct passages of untreated, immortal RWPE-1 cells was compared to three timepoints of arsenite-exposed RWPE-1 cells (CAsE-PE) that have undergone malignant transformation.
Project description:The aim of this study was to determine how gene expression is changed after arsenite-induced malignant transformation of prostate epithelial cells.
Project description:Aberrant DNA methylation is frequently observed in cancer. The aim of this study was to determine how DNA methylation is changed after toxicant-induced malignant transformation. This study also puts the DNA methylation changes into context with respect to the aberrant DNA methylation events that occur in bladder and prostate carcinogenesis not associated with toxicant exposure. Immortalized UROtsa (n=3) and RWPE-1 (n=2) are compared to normal HUC (n=2) and PrEC (n=2), respectively. Arsenite (n=1), monomethylarsonous acid (n=2) or cadmium (n=1) transformed UROtsa are compared to parental UROtsa (n=3). Arsenite (n=2), cadmium (n=1) or MNU (n=1) transformed RWPE-1 cells are compared to parental RWPE-1 cells (n=2). Clinical bladder tumor biopsies (n=6), urothelial carcinoma cell lines (n=2) and prostate cancer cell lines (n=3) are compared to thier normal tissue counterparts HUC (n=2) and PrEC (n=2). Immunoprecipitation using anti-methylcytosine (5MeC) antibody.
Project description:Aberrant DNA methylation is frequently observed in cancer. The aim of this study was to determine how DNA methylation is changed after toxicant-induced malignant transformation. This study also puts the DNA methylation changes into context with respect to the aberrant DNA methylation events that occur in bladder and prostate carcinogenesis not associated with toxicant exposure. Immortalized UROtsa (n=3) and RWPE-1 (n=2) are compared to normal HUC (n=2) and PrEC (n=2), respectively. Arsenite (n=1), monomethylarsonous acid (n=2) or cadmium (n=1) transformed UROtsa are compared to parental UROtsa (n=3). Arsenite (n=2), cadmium (n=1) or MNU (n=1) transformed RWPE-1 cells are compared to parental RWPE-1 cells (n=2). Clinical bladder tumor biopsies (n=6), urothelial carcinoma cell lines (n=2) and prostate cancer cell lines (n=3) are compared to thier normal tissue counterparts HUC (n=2) and PrEC (n=2). Immunoprecipitation using anti-methylcytosine (5MeC) antibody.
Project description:Asthma is a chronic inflammatory airway disease characterized by airway inflammation and remodeling. The role of 15-oxo-5Z,8Z,11Z,13E-eicosatetraenoic acid (15-oxoETE), a 15-HETE metabolite catalyzed by 15-prostaglandin dehydrogenase (15-PGDH), has been relatively unexplored in asthma. In this study, we used RNA-seq to explore the effect of 15-KETE on the transcriptome of airway epithelial cells, aiming to identify its potential downstream targets and mechanisms of action.
Project description:miRNA Array was used to detect the expression level of miRNAs in human bronchial epithelial (HBE) cells that were transformed by a low-level arsenite exposure for 13 weeks. The transformed cells exhibited malignant phenotypes manifested by increased levels of cell proliferation, cell migration and high level of cell survival. Subsequently, 191 differentially expressed miRNAs are identified to be associated with arsenite-induced malignant transformation by employing miRNA Array. Among them, six miRNAs were chosen to validate their expression levels with qPCR and 17 miRNAs were further explored their target genes and the network. Three databases, TargetMiner, miRDB and TarBase, were used to predict the target genes of miRNAs and a total of 954 common genes were identified. Results of Gene Ontology (GO) analyses showed that these target genes were involved in diverse terms of GO categories, such as positive regulation of macroautophagy, epithelial cell maturation and synaptic vesicle clustering and so on. Moreover, results of KEGG pathway analyses demonstrated that most of these target genes were enriched in various cancer-related pathways including non-small cell lung cancer, Wnt signaling pathway, cell cycle, p53 signaling pathway and so forth. The miRNA-gene regulatory network, which was constructed by cytoscape software with miRNAs and their target genes, showed that the target genes were mainly regulated by miR-15b-5p, miR-106b-5p and miR-320d. Although more experimental verification is still needed to prove these predictions, our results may provide new insights into miRNA-mediated mechanisms underlying arsenite-induced malignant transformation.