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Transcriptomics analysis during the transient ceftazidime tolerance of Burkholderia pseudomallei

ABSTRACT: Transcriptomics analysis during the transient ceftazidime tolerance of Burkholderia pseudomallei

PROVIDER: PRJNA706721 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13859463.fastq.gz	Fastqsanger.gz
	SRR13859464.fastq.gz	Fastqsanger.gz
	SRR13859465.fastq.gz	Fastqsanger.gz
	SRR13859466.fastq.gz	Fastqsanger.gz
	SRR13859467.fastq.gz	Fastqsanger.gz

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Transcriptomics analysis during the transient ceftazidime tolerance of Burkholderia pseudomallei

Project description:B. pseudomallei strain K96243 is sensitive to the drug ceftazidime (CAZ), but has been shown to exhibit transient CAZ tolerance when in a biofilm form. To investigate an observed shift in gene expression profile during ceftazidime (CAZ) tolerance and to better understand the mechanistic aspects of this transient tolerance, RNA-sequencing was performed on B. pseudomallei K96243 from the following three growth states: planktonic-free, biofilm, and planktonic shedding cells. Results indicated that the expression of 651 genes (10.97%) were significantly changed in both biofilm (resistant) and planktonic shedding (sensitive) cells in comparison to the planktonic state. Burkholderia biofilm shifts its transcriptome in response to ceftazidime exposure by regulating iron-sulfur stabilizing and metabolic-related genes.

2021-06-30 | GSE168275 | GEO

Genomic Loss of Penicillin-Binding Protein 3 in Burkholderia pseudomallei Confers Clinical Resistance to Ceftazidime

Project description:Array-CGH analysis and Burkholderia pseudomallei isolates pre and post ceftazidime relapse.

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Genomic Loss of Penicillin-Binding Protein 3 in Burkholderia pseudomallei Confers Clinical Resistance to Ceftazidime

Project description:Array-CGH analysis and Burkholderia pseudomallei isolates pre and post ceftazidime relapse. Genomic DNA from both the parental strains and variant strains were labeled with Cy3 or Cy5 fluorescent dyes and hybridized onto a customized microarray with probes designed from the reference Bp K96243 genome. Log2 signal ratios of parental strain over the variant strains were then computed after normalization to find genomic loss or gain in the variant strains.

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Project description:Burkholderia pseudomallei is the causative agent of melioidosis a disease endemic in South-East Asia and Northern Australia. The mortality rates in these areas are unacceptably high even with antibiotic treatment, attributed to intrinsic and acquired resistance of B. pseudomallei to antibiotics. With very few options for therapeutics there is an urgent requirement to identify anti-bacterial targets for the development of novel, effective treatments. In this study we examine the role and effect of ppiB on the proteome. Using LFQ analysis we show loss of ppiB has dramatic effect on the Burkholderia pseudomallei proteome.

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Project description:Burkholderia mallei and Burkholderia pseudomallei are both potential biological threats agents. Melioidosis caused by B. pseudomallei is endemic in Southeast Asia and Northern Australia, while glanders caused by B. mallei infections are rare. Here we studied the proteomes of different B. mallei and B. pseudomallei isolates to determine species specific characteristics. Analyzing the expressed proteomes of B. mallei and B. pseudomallei revealed differences between B. mallei and B. pseudomallei but also between isolates from the same species. Expression of multiple virulence factors and proteins of several PKS/NRPS clusters was demonstrated. Proteome analysis can be used not only to identify bacteria but also to characterize the expression of important factors that putatively contribute to pathogenesis of B. mallei and B. pseudomallei.

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