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Bladder cancer cells have been shown to secrete a variety of factors that are not related to cells of urothelial origin. The histogenesis of these tumour developments is uncertain, and a variety of theories have been previously reported. In the present manuscript, we identify the factors constitutively produced by a human bladder cancer cell line (KU-19-19) that was found to produce beta human chorionic gonadotrophin (beta-hCG), granulocyte colony-stimulating factor (G-CSF), granulocyte-macrophage colony-stimulating factor (GM-CSF), interleukin 1alpha (IL-1alpha), interleukin 6 (IL-6) and interleukin 8 (IL-8). Read more >
Nuclear factor (NF)-kappaB is a transcription factor that not only induces and controls various genes, including those of inflammatory cytokines, but also activates genes which suppress apoptosis. It has been clearly demonstrated that certain advanced human bladder cancer cells constitutively acquire the ability to activate NF-kappaB, which not only protects cancer cells from apoptotic cell death, but also upregulates the production of various cytokines that may increase the malignant potential of the disease and cause paraneoplastic syndromes. Read more >
The endothelin axis consists of endothelin-1 (ET-1) and its two receptors, ET(A)- and ET(B)-receptor (ET(A)-R and ET(B)-R). In several tumor entities, the ET(A)-R plays a significant role as a drug target. In our study, we investigated whether inhibition of ET(A)-R with atrasentan leads to an antitumor effect in urinary bladder carcinoma as well.
To explore the potential therapeutic effects of the nuclear factor-kappaB (NF-kappaB) inhibitor dehydroxymethylepoxyquinomicin (DHMEQ). KU-19-19 cells, originally derived from a patient with invasive bladder cancer who exhibited marked leukocytosis, produce multiple cytokines. This model of clinically advanced bladder cancer, in which NF-kappaB is constitutively activated, was used in this study.
We have developed unique replication-competent retroviral (RCR) vectors based on murine leukemia virus that provide improved efficiency of viral delivery, allow for long-term transgene expression and demonstrate an intrinsic selectivity for transduction of rapidly dividing tumor cells. The purpose of this study was to evaluate the in vivo transduction efficiency and the therapeutic efficacy of the RCR vector mediated delivery of Escherichia coli purine nucleoside phosphorylase (PNP) in combination with fludarabine phosphate for bladder cancer. Read more >
We investigated the interaction of endogenous interleukin (IL)-1beta, IL-1ra, and interleukin-1beta converting enzyme (ICE) in four human urological cancer cell lines, KU-19-19, KU-1, KU-2 and KU-19-20. Northern blot analysis showed that IL-1beta gene was expressed in all cell lines. On the other hand, in KU-19-19 and KU-19-20, the gene expressions of both IL-1ra and ICE were suppressed. Read more >
We investigated whether the cell growth and apoptosis of multiple cytokine-producing bladder cancer cells can be regulated by nuclear factor kappaB (NF-kappaB). The bladder cancer cell line KU-19-19, obtained from a 76-year-old man who demonstrated marked leukocytosis, produces multiple cytokines and demonstrates autocrine growth by granulocyte colony-stimulating factor (G-CSF). Read more >
We previously reported that angiotensin II type 1 receptor (AT1R) antagonists enhanced the cytotoxity of cis-dichlorodiammineplatinum (CDDP) in a bladder cancer xenograft model. To elucidate the synergistic mechanism, we investigated whether reactive oxygen species (ROS) generation induced by CDDP may affect the regulation of AT1R expression. Read more >
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