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ABSTRACT: Microbial community analysis provides insights into the effects of tetrahydrofuran on 1,4-dioxane biodegradation

PROVIDER: PRJNA530571 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8842460.fastq.gz	Fastqsanger.gz
	SRR8842470.fastq.gz	Fastqsanger.gz
	SRR8842461.fastq.gz	Fastqsanger.gz
	SRR8842471.fastq.gz	Fastqsanger.gz
	SRR8842452.fastq.gz	Fastqsanger.gz

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Project description:Microbial community analysis provides insights into the effects of tetrahydrofuran on 1,4-dioxane biodegradation Targeted loci

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Project description:We evaluated liver tissues of B6D2F1/Crl mice exposed to 0, 40, 200, 600, 2000, or 6000 ppm 1,4-dioxane in drinking water for 7, 28, or 90 days in support of an investigation of the mode of action for 1,4-dioxane-induced murine liver tumors. TempO-Seq technology was used to measure global hepatic gene expression. Exposure-induced transcriptional responses increased by dose and exposure duration, with few differentially expressed genes at 40 and 200 ppm regardless of exposure duration. Pathway enrichment analysis identified significant perturbations in pathways associated with xenobiotic metabolism, complement and coagulation cascades and fatty acid metabolism in 600, 2000, and 6000 ppm groups at all timepoints compared to time-matched control groups. A significant transcriptomic proliferative response was only observed in 6000 ppm exposed mice at 90 days. Differential gene expression and pathway enrichment analysis results suggest 600 ppm as a potential threshold concentration for hepatic transcriptomic response to 1,4-dioxane in female mice.

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Project description:Understanding the bacterial community structure, and their functional analysis for active bioremediation process is essential to design better and cost effective strategies. Microarray analysis enables us to simultaneously study the functional and phylogenetic markers of hundreds of microorganisms which are involved in active bioremediation process in an environment. We have previously described development of a hybrid 60-mer multibacterial microarray platform (BiodegPhyloChip) for profiling the bacterial communities and functional genes simultaneously in environments undergoing active bioremediation process (Pathak et al; Appl Microbiol Biotechnol,Vol. 90, 1739-1754). The present study involved profiling the status of bacterial communities and functional (biodegradation) genes using the developed 60-mer oligonucleotide microarray BiodegPhyloChip at five contaminated hotspots in the state of Gujarat, in western India. The expression pattern of functional genes (coding for key enzymes in active bioremediation process) at these sites was studied to understand the dynamics of biodegradation in the presence of diverse group of chemicals. The results indicated that the nature of pollutants and their abundance greatly influence the structure of bacterial communities and the extent of expression of genes involved in various biodegradation pathways. In addition, site specific factors also play a pivotal role to affect the microbial community structure as was evident from results of 16S rRNA gene profiling of the five contaminated sites, where the community structure varied from one site to another drastically.

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