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Transcriptomic stress response in Streptococcus mutans following treatment with a sublethal concentration of chlorhexidine digluconate

ABSTRACT: Transcriptomic stress response in Streptococcus mutans following treatment with a sublethal concentration of chlorhexidine digluconate

PROVIDER: PRJNA811315 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR18175843.fastq.gz	Fastqsanger.gz
	SRR18175844.fastq.gz	Fastqsanger.gz
	SRR18175845.fastq.gz	Fastqsanger.gz
	SRR18175846.fastq.gz	Fastqsanger.gz
	SRR18175847.fastq.gz	Fastqsanger.gz

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Transcriptomic stress response in Streptococcus mutans following treatment with a sublethal concentration of chlorhexidine digluconate

Project description:Despite the widespread use of antiseptics such as chlorhexidine digluconate (CHX) in dental practice and oral care, the risks of potential resistance toward antiseptics in oral bacteria have only been highlighted very recently. Since the molecular mechanisms behind antiseptic resistance or adaptation are not entirely clear yet and the bacterial stress response has not been investigated systematically so far, the aim of the present study was to investigate the transcriptomic stress response in Streptococcus mutans after treatment with CHX using RNA sequencing. Planktonic cultures of stationary phase S. mutans were treated with a sublethal dose of CHX (125 µg/mL) for 5 min. After treatment, RNA was extracted, and RNA sequencing was performed on the Illumina NextSeq 500. Differential expressed genes were analyzed and validated by qRT-PCR. The analysis of the differential gene expression following pathway analysis revealed a considerable number of genes and pathways significantly regulated in S. mutans after sublethal treatment with CHX. In summary, expression of 423 genes was up-regulated and 295 genes down-regulated after CHX treatment. Analysis of differentially expressed genes and significantly regulated pathways showed regulation of genes involved in purine nucleotide synthesis, biofilm formation, transport systems and stress responses. In conclusion, these results show an overview of the transcriptomic stress response in S. mutans upon exposure to CHX and give an insight in potential mechanisms that may result in development of resistances.

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Project description:Purpose: In order to clarify the molecular response mechanism of Tetranychus truncatus to sublethal concentrations of abamectin. Methods: We sequenced the transcriptome of Tetranychus truncatus treated with sublethal concentration of abamectin and control. Results: we provide a comprehensive transcriptome resource for Tetranychus truncatus derived from treating with sublethal concentration abamectin and control. Conclusions: The new genomic resources and data that we present in this study for Tetranychus truncatus will substantially facilitate molecular studies of underlying mechanisms involved in abamectin resistance.

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Analysis of Escherichia coli adaptation to a sublethal concentration of sodium bisulfite

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Project description:In two disparate models, we show that rapid revaccination following sublethal gamma radiation exposure rescues memory CD8+ T cell Responses.

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Project description:Since the molecular mechanisms behind adaptation and the bacterial stress response toward antimicrobial photodynamic therapy (aPDT) are not entirely clear yet, the aim of the present study was to investigate the transcriptomic stress response in Escherichia coli after sublethal treatment with aPDT using RNA sequencing (RNA-Seq). Planktonic cultures of stationary phase E. coli were treated with aPDT using a sublethal dose of the photosensitizer SAPYR. After treatment, RNA was extracted, and RNA-Seq was performed on the Illumina NextSeq 500. Differentially expressed genes were analyzed and validated by qRT-PCR. The analysis of the differential gene expression following pathway enrichment analysis revealed a considerable number of genes and pathways significantly up- or down-regulated in E. coli after sublethal treatment with aPDT. Expression of 1018 genes was up-regulated and of 648 genes was down-regulated after sublethal treatment with aPDT as compared to irradiated controls. Analysis of differentially expressed genes and significantly de-regulated pathways showed regulation of genes involved in oxidative stress response and bacterial membrane damage. In conclusion, the results show a transcriptomic stress response in E. coli upon exposure to aPDT using SAPYR and give an insight into potential molecular mechanisms that may result in development of adaptation

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Project description:Transcriptional analysis of the effects of oxygen concentraion in S. mutans RNA was extracted from 3 or 4 replicate samples of S. mutans UA159, UA159 grown in 8.4 % oxygen concentration and MU1020 (M-bM-^HM-^Fnox) grown in continuous culture to steady-state pH values of 7. RNA was labeled with Cy3. For each replicate, labeled RNA was hybridized to slides along with Cy5-labeled reference RNA, extracted from S. mutans UA159 cultures grown to mid-log.

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