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Mycobacterium tuberculosis transcriptional response to Rifampicin

ABSTRACT: Mycobacterium tuberculosis transcriptional response to Rifampicin

PROVIDER: PRJNA701434 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13687743_1.fastq.gz	Fastqsanger.gz
	SRR13687743_2.fastq.gz	Fastqsanger.gz
	SRR13687744_1.fastq.gz	Fastqsanger.gz
	SRR13687744_2.fastq.gz	Fastqsanger.gz
	SRR13687745_1.fastq.gz	Fastqsanger.gz

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Mycobacterium tuberculosis transcriptional response to Rifampicin

Project description:The ability of Mycobacterium tuberculosis (Mtb) to adopt heterogeneous physiological states, underlies it’s success in evading the immune system and tolerating antibiotic killing. Drug tolerant phenotypes are a major reason why the tuberculosis (TB) mortality rate is so high, with over 1.8 million deaths annually. To develop new TB therapeutics that better treat the infection (faster and more completely), a systems-level approach is needed to reveal the complexity of network-based adaptations of Mtb. Here, we report the transcriptional response of Mtb to the drug Rifampicin. We performed transcriptomic sequencing (RNA-seq) on Mtb bacilli at 4, 24, 72 h following exposure to the drug.

2021-12-15 | GSE166622 | GEO

Transcription profiling by array of Rifampicin-induced transcriptome response in rifampicin-resistant Mycobacterium tuberculosis

Project description:Tuberculosis (TB) is still a major life-threatening infectious disease, within which especially the rise of multidrug resistant TB (MDR-TB) is currently worrying. This study focuses on mechanisms of development of rifampicin resistance, since rifampicin seems to play an important role in the development of MDR-TB. To provide further insight in rifampicin resistance, we performed a genome-wide transcriptional profile analysis for Mycobacterium tuberculosis (M. tuberculosis) using microarray technology and qRT-PCR analysis. We exposed a rifampicin-susceptible H37Rv wild type (H37Rv-WT) and a rifampicin-resistant progeny H37Rv strain with a H526Y mutation in the rpoB gene (H37Rv-H526Y) to several concentrations of rifampicin, to define the effect of rifampicin on the transcription profile. Our study showed that there are resistance-dependant differences in response between both M. tuberculosis strains. Gene clusters associated with efflux, transport and virulence were altered in the rifampicin-resistant H37Rv mutant compared to the rifampicin-susceptible H37Rv-WT strain after exposure to rifampicin. We conclude that the small gene cluster Rv0559c-Rv0560c in the H37Rv-H526Y strain was remarkably up-regulated in the microarray analysis and qRT-PCR results and appeared to be dependent on rifampicin concentration and time of exposure. Therefore this study suggests that Rv0559c and Rv0560c play a pivotal role in rifampicin resistance of M. tuberculosis. Further investigation of Rv0559c and Rv0560c is needed to reveal function and mechanism of both genes that were triggered upon rifampicin exposure. [Data is also available from http://bugs.sgul.ac.uk/E-BUGS-139]

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Identifying the fitness cost of rifampicin-resistance in Mycobacterium tuberculosis through RNAseq profiling.

Project description:The experiment was designed to infer the fitness cost of rifampicin-resistance in Mycobacterium tuberculosis through expression analysis. The approach relied on: 1. Tracking the expression changes occurring as a result of the rifampicin-resistance conferring mutation Ser450Leu in RpoB and subsequent gain of compensatory mutation Leu516Pro in RpoC. The hypothesis was that any cost-incurring expressional changes would be reversed in the presence of compensatory mutations. The strains in this set were described before here: PMID 22179134. 2. Comparing the impact of the same rifampicin-resistance mutation (RpoB Ser450Leu) in five different genetic backgrounds. Here the comparison was solely between RpoB Ser450Leu and their cognate drug susceptible wild type ancestor. One of the strain pairs is the same as in point 1. above.

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