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Chromatin accessibility dynamics of Chlamydia-infected epithelial cells

ABSTRACT: Chromatin accessibility dynamics of Chlamydia-infected epithelial cells

PROVIDER: PRJNA548109 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9257670.fastq.gz	Fastqsanger.gz
	SRR9257670_1.fastq.gz	Fastqsanger.gz
	SRR9257670_2.fastq.gz	Fastqsanger.gz
	SRR9257680.fastq.gz	Fastqsanger.gz
	SRR9257680_1.fastq.gz	Fastqsanger.gz

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Chromatin accessibility dynamics of Chlamydia-infected epithelial cells

Project description:We applied Formaldehyde-Assisted Isolation of Regulatory Elements enrichment followed by sequencing (FAIRE-Seq) to generate genome-wide temporal chromatin maps of Chlamydia trachomatis-infected human epithelial cells in vitro over the chlamydial developmental cycle. We detected both conserved and distinct temporal regions of chromatin accessibility associated with C. trachomatis infection. The observed differentially accessible chromatin regions, including several Clusters of Open Regulatory Elements (COREs) and temporally-enriched sets of transcription factors, may help shape the host cell response to infection. These regions and motifs were linked to genomic features and genes associated with immune responses, re-direction of host cell nutrients, intracellular signaling, cell-cell adhesion, extracellular matrix, metabolism and apoptosis. This work will serve as a basis for future functional studies of transcriptional regulation and epigenomic regulatory elements in Chlamydia-infected human cells.

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Chromatin accessibility dynamics of Chlamydia-infected epithelial cells.

Project description:Chlamydia are Gram-negative, obligate intracellular bacterial pathogens responsible for a broad spectrum of human and animal diseases. In humans, Chlamydia trachomatis is the most prevalent bacterial sexually transmitted infection worldwide and is the causative agent of trachoma (infectious blindness) in disadvantaged populations. Over the course of its developmental cycle, Chlamydia extensively remodels its intracellular niche and parasitises the host cell for nutrients, with substantial resulting changes to the host cell transcriptome and proteome. However, little information is available on the impact of chlamydial infection on the host cell epigenome and global gene regulation. Regions of open eukaryotic chromatin correspond to nucleosome-depleted regions, which in turn are associated with regulatory functions and transcription factor binding. We applied formaldehyde-assisted isolation of regulatory elements enrichment followed by sequencing (FAIRE-Seq) to generate temporal chromatin maps of C. trachomatis-infected human epithelial cells in vitro over the chlamydial developmental cycle. We detected both conserved and distinct temporal changes to genome-wide chromatin accessibility associated with C. trachomatis infection. The observed differentially accessible chromatin regions include temporally-enriched sets of transcription factors, which may help shape the host cell response to infection. These regions and motifs were linked to genomic features and genes associated with immune responses, re-direction of host cell nutrients, intracellular signalling, cell-cell adhesion, extracellular matrix, metabolism and apoptosis. This work provides another perspective to the complex response to chlamydial infection, and will inform further studies of transcriptional regulation and the epigenome in Chlamydia-infected human cells and tissues.

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