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ABSTRACT: Baicalin repair transcriptional changes induced by antibiotics

PROVIDER: PRJNA823501 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR18615346_1.fastq.gz	Fastqsanger.gz
	SRR18615346_2.fastq.gz	Fastqsanger.gz
	SRR18615347_1.fastq.gz	Fastqsanger.gz
	SRR18615347_2.fastq.gz	Fastqsanger.gz
	SRR18615348_1.fastq.gz	Fastqsanger.gz

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Project description:Baicalin repair transcriptional changes induced by antibiotics

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Project description:Baicalin is the main flavonoid component extracted from Scutellaria root. It has multiple potent biological activities, including estrogen-like activity. In our study, we investigated the function of baicalin on mammary stem cell proliferation and mammary development. Our results demonstrated that baicalin significantly accelerates mammary gland development at puberty and during pregnancy; In vitro, baicalin significantly promotes colony formation ability of mammary basal epithelial cells in a three-dimensional (3D) culture system; In vivo, baicalin improved mammary regeneration efficiency in mouse xenograft model. But the mechanism was unknown. Therefore, transcriptome analysis of basal and luminal cells treatment with baicalin was performed.

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Various evolutionary trajectories lead to loss of activity of tobramycin-potentiating compounds in Burkholderia cenocepacia biofilms

Project description:Antibiotic adjuvants are commonly described as an alternative approach to overcome bacterial resistance towards conventional antibiotics. In this experiment, we investigated this statement for tobramycin (TOB) in combination with three adjuvants; baicalin hydrate (BH), a quorum sensing inhibitor, econazole (ECO) and miconazole (MICO), two antifungal agents that are repurposed as antibiotic adjuvants. We repeatedly exposed mature (24 hour old) Burkholderia cenocepacia J2315 biofilm cells to TOB alone (768ug/ml), or a combination of TOB with either BH (250uM), ECO (1uM) or MICO (1uM). We also included an untreated control. After a treatment, the remaining cells were quantified and the cells were allowed to regrow for another 48 hours. This process is one cycle. At the end of the experiment, biofilm cells were exposed to 15 cycles. DNA extraction was performed on the evolved cells and of cells from the start population. DNA sequencing was performed on these samples and single nucleotide polymorphisms compared to the start population were evaluated.

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Genome-wide screening of VxrB binding sites in Vibrio cholerae

Project description:Bactericidal antibiotics are powerful drugs because they not only inhibit essential bacterial functions, but convert them into toxic processes. Many bacteria are remarkably tolerant against antibiotics, due to inducible damage repair responses. How these responses promote whole population tolerance in important human pathogens is poorly understood. The two-component system VxrAB of the diarrheal pathogen Vibrio cholerae, a model system for tolerance against cell wall damaging (e.g., beta-lactam) antibiotics, is required for high-level beta-lactam tolerance. Here, we report the mechanism of VxrAB-mediated survival. We find that -lactam antibiotics inappropriately induce the Fur-regulated iron starvation response, causing an increase in intracellular free iron and colateral oxidative damage. VxrAB reduces antibiotic-induced toxic influx of Fe by downregulating iron importers and induces cell wall synthesis functions to counteract cell wall damage. Our results highlight the complex responses elicited by antibiotics and suggest that the ability to counteract diverse stresses promotes high-level antibiotic tolerance.

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