ABSTRACT: HERVE 6q15 was deleted by CRISPR in A498 cells, which were then compared with parental A498 cells, with the aim of assessing the impact of this retroviral insertion
Project description:Urinary tract infections (UTIs) constitute a highly relevant model of microbial adaptation, in which the contrasting effects of pathogens and commensals on host tissues are clearly displayed. While virulent Escherichia coli cause severe, potentially life-threatening disease by breaking the inertia of the mucosal barrier and infecting the kidneys, the most common outcome of bacteriuria is an asymptomatic carrier state resembling commensalism at other mucosal sites. It remains unclear if the lack of destructive inflammation merely reflects low virulence or if carrier strains actively inhibit disease associated responses in the host. To address this question, we examined the effects of asymptomatic bacterial carriage on host gene expression. The asymptomatic strain E. coli 83972 caused reduction in Pol II phosphorylation in the nuclei of human kidney epithelial A498 cells. To specifically address if Pol II inhibition alters the response to infection, A498 cells were pretreated with 5,6-dichloro-1-b-D-ribofuranosylbenzimidazole (DRB). This adenosine analogue has been proposed to specifically and reversibly inhibit Pol II transcription without directly affecting other cellular functions. A498 cultered cells were infected with E. coli 83972 or DRB for 4 hours. The culture medium with DMSO was used as a background control. A498 cells were infected with E. coli 83972 or DRB for 4 h. Isolated RNA was subjected to whole genome transcriptome analysis.
Project description:HIF-2alpha is essential for (VHL-/-) ccRCC subcutaneous tumor growth in mice, and in tumor cell lines, its inhibition results in increased ROS accumulation, tumor cell death and responsiveness to radiation treatment. We have utilized transcriptional profiling to screen for putative HIF-2alpha targets genes that serve an anti-oxidant and, thus, cell survival function. A498 ccRCC cell line was treated with control siRNA or mixture of two HIF-2alpha specific siRNA for 48 hours, and RNA was harvested. 4 independent experiments were performed, and expression was compared between control and HIF-2alpha knockdown groups. 8 total samples were applied to Affymetrix Human Gene 1.0 ST Arrays. We performed two-class paired analysis using Significance Analysis of Microarrays (SAM) software to compare expression in the CT (control siRNA) and H2 (Hif2-alpha siRNA) groups.
Project description:Urinary tract infections (UTIs) constitute a highly relevant model of microbial adaptation, in which the contrasting effects of pathogens and commensals on host tissues are clearly displayed. While virulent Escherichia coli cause severe, potentially life-threatening disease by breaking the inertia of the mucosal barrier and infecting the kidneys, the most common outcome of bacteriuria is an asymptomatic carrier state resembling commensalism at other mucosal sites. It remains unclear if the lack of destructive inflammation merely reflects low virulence or if carrier strains actively inhibit disease associated responses in the host. To address this question, we examined the effects of asymptomatic bacterial carriage on host gene expression. A498 cell line has been validated as a model of uropathogenic E. coli infection; the cells express functional receptors for bacterial virulence ligands and the response to virulent strains reflects human UTI. The cells were infected with asymptomatic and pathogenic E. coli in vitro, and harvested RNA was subjected to whole genome transcriptome analysis. A498 human kidney epithelial cells were infected with the asymptomatic (E. coli 83972) or virulent strains (E. coli CFT073) for 4 hours. The cells with culture medium alone were used as a control. The experiment was performed in biological duplicates or triplicates.
Project description:ANXA4 WT (control) and ANXA4 KO in A498 kidney cancer cells was generated using CRISPR/Cas9 and two independent gRNAs for control and two independent gRNAs targeting ANXA4. Single cells clones (Ctrl.-1, Crtl.-2, KO-1, KO-2) were selected and validated by western blotting confirming loss of ANXA4 in KO cell lines on protein level. Transcriptome profiling (RNA-Sequencing) and differential gene expression analysis of 2 independent replicates per cell line was performed (resulting in 4 control and 4 ANXA4 KO sequencings). ANXA4 KO cells exhibit transcriptional changes compared to WT cells including upregulation of the ETS transcription factor ELF3 and regulation of Matrisome genes.
Project description:Raji cells were transduced to express either that canonical IL-13Rα1 subunit of the shared type II receptor for IL-4 and IL-13 or a newly discovered, termed IL-13Rα1-LOR1a. These cells were treated with IL-13 and compared with untreated control cells, as well as with treated and untreated untransduced Raji cells, with the aim of assessing the potential of the IL-13Rα1-LOR1a isoform to transmit IL-13 signals. Each condition was tested in triplicate.
Project description:A498 cells, established from a clear cell renal cell cancer of a 52 years old male patient, were obtained from ATCC and maintained in DMEM supplemented with 10% fetal calf serum (FCS). This cell line does not express functional VHL. A498 subclones stably transfected with HA-pVHL30 or control plasmid have been described and were maintained in 0.5 mg/ml G418.
Project description:Set domain-containing 2 (SETD2) is the most frequently mutated gene among all the histone methyltransferases (HMTs) in Clear cell renal cell carcinoma (ccRCC). Loss of function of SETD2 is significantly associated with poor prognosis in patients with ccRCC. A better understanding of the roles of SETD2 played in ccRCC can greatly improve the prognosis and quality of life of patients with kidney cancer. Clear cell renal carcinoma cell A498 were treated with si-SETD2 and si-NC, and the exosomes were extracted.
Project description:Urinary tract infections (UTIs) constitute a highly relevant model of microbial adaptation, in which the contrasting effects of pathogens and commensals on host tissues are clearly displayed. While virulent Escherichia coli cause severe, potentially life-threatening disease by breaking the inertia of the mucosal barrier and infecting the kidneys, the most common outcome of bacteriuria is an asymptomatic carrier state resembling commensalism at other mucosal sites. It remains unclear if the lack of destructive inflammation merely reflects low virulence or if carrier strains actively inhibit disease associated responses in the host. To address this question, we examined the effects of asymptomatic bacterial carriage on host gene expression. The asymptomatic strain E. coli 83972 caused reduction in Pol II phosphorylation in the nuclei of human kidney epithelial A498 cells. To specifically address if Pol II inhibition alters the response to infection, A498 cells were pretreated with 5,6-dichloro-1-b-D-ribofuranosylbenzimidazole (DRB). This adenosine analogue has been proposed to specifically and reversibly inhibit Pol II transcription without directly affecting other cellular functions. A498 cultered cells were infected with E. coli 83972 or DRB for 4 hours. The culture medium with DMSO was used as a background control.
Project description:HIF-2alpha is essential for (VHL-/-) ccRCC subcutaneous tumor growth in mice, and in tumor cell lines, its inhibition results in increased ROS accumulation, tumor cell death and responsiveness to radiation treatment. We have utilized transcriptional profiling to screen for putative HIF-2alpha targets genes that serve an anti-oxidant and, thus, cell survival function. A498 ccRCC cell line was treated with control siRNA or mixture of two HIF-2alpha specific siRNA for 48 hours, and RNA was harvested. 4 independent experiments were performed, and expression was compared between control and HIF-2alpha knockdown groups.