Ontology highlight
ABSTRACT:
PROVIDER: PRJNA556952 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR9849480.fastq.gz | Fastqsanger.gz | |||
| SRR9849481.fastq.gz | Fastqsanger.gz | |||
| SRR9849482.fastq.gz | Fastqsanger.gz | |||
| SRR9849483.fastq.gz | Fastqsanger.gz | |||
| SRR9849484.fastq.gz | Fastqsanger.gz |
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Project description:The aim of this study was to gain insight into the potential mechanism of resistance to arsenic trioxide (ATO). The gene expression profile of naive (NB4) (Acute promyelocytic leukemia (APL) cell line and one of its in house generated ATO resistant sub clone (NB4-VM-AsR1) was done using whole genome microarray and compared to generate the differential expression profile which will give insight into the mechanisms of ATO resistance in APL. Agilent one-color experiment,Organism: Human ,Agilent Whole Genome Human 4x44k (AMADID: 014850) , Labeling kit: Agilent Quick-Amp labeling Kit (p/n5190-0442) naive versus arsenic trioxide resistant acute promyelocytic leukemia cell line NB4
2013-08-02 | E-GEOD-42031 | biostudies-arrayexpress
Project description:To further characerize the arsenic trioxide (ATO) resistance in acutepromyelocytic leukemia, we had made NB4 cell line (arsenic sensitive) to be resistant to arsenic by exposing them to increasing concentration till they are resistant to it and we named it NB4-EV-AsR1. We have also used another cell line (UF1) which is by default resistant to arsenic. Comparing the GEP will give us novel pathways that can contirbute to arseic trioxide.
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Project description:In the face of escalating challenges posed by infections with multiple drug-resistant (MDR) pathogens, the use of bacteriophages in therapeutic applications has emerged as a critically relevant and often sole alternative to traditional antibiotics. The most promising results of phage therapy have been demonstrated in the case of Staphylococcus aureus. It should be noted that the S. aureus population is characterized by a high degree of clonality. Strains belonging to sequence type 239 are among the main epidemic strains of methicillin-resistant S. aureus, identified worldwide. Many ST239 strains are characterized by MDR and resistance to virulent bacteriophages, and can become a serious problem in medicine. The purpose of this study was to investigate the resistance of clinical strains of S. aureus SA191REV of ST239 to bacteriophages of the Herelleviridae family using systems biology methods, starting from microbiological data on the interaction of strains with bacteriophages to transcriptomic and proteomic analysis. As results, the main changes in the cells of the resistant strain caused by phage infection are related to the energy metabolism in the cell. Significant changes were found in the functioning of the tricarboxylic acid cycle, glycolytic process, and glucose metabolic process. The most likely mechanism of resistance in the case of SA191REV strains is the premature death of infected cells due to the type I toxin-antitoxin system, as well as the hyperexpression of the lrgA and lrgB genes.
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Project description:Background: The high number of heavy metal resistance genes in the soil bacterium Cupriavidus metallidurans CH34 makes it an interesting model organism to study microbial responses to heavy metals. Results: In this study the transcriptional response of this bacterium was measured after challenging it to a wide range of sub-lethal concentrations of various essential or toxic metals. Considering the global transcriptional responses for each challenge as well as by identifying the overlap in upregulated genes between different metal responses, the sixteen metals could be clustered in three different groups. Additionally, next to the assessment of the transcriptional response of already known metal resistance genes, new metal response gene clusters were identified. The majority of the metal response loci showed similar expression profiles when cells were exposed to different metals, suggesting complex cross-talk at transcriptional level between the different metal responses. The highly redundant nature of these metal resistant regions – illustrated by the large number of paralogous genes – combined with the phylogenetic distribution of these metal response regions within evolutionary related and other metal resistant bacteria, provides important insights on the recent evolution of this naturally soil dwelling bacterium towards a highly metal-resistant strain found in harsh and anthropogenic environments. Conclusions: The metal-resistant soil bacterium Cupriavidus metallidurans CH34 displays myriads of gene expression patterns when exposed to a wide range of heavy metals at non-lethal concentrations. The interplay between the different gene expression clusters points towards a complex cross-regulated regulatory network governing heavy metal resistance in C. metallidurans CH34. Keywords: Cupriavidus metallidurans CH34, transcriptional regulation, heavy metal resistance Two-condition experiments. Comparing samples after induction with heavy metals versus non-induced samples. Biological duplicate or triplicate. Each array contains 3 or 4 technical replicates.
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