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Microarray analysis of long noncoding RNA expression profile in HeLa cells infected Chlamydia trachomatis

ABSTRACT: Microarray analysis of long noncoding RNA expression profile in HeLa cells infected Chlamydia trachomatis

PROVIDER: PRJNA695235 | ENA |

REPOSITORIES: ENA

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Microarray analysis of long noncoding RNA expression profile in HeLa cells infected Chlamydia trachomatis

Project description:Chlamydia trachomatis (C. trachomatis) is an intracellular bacterium, and is one of the main pathogens that cause sexually transmitted infections worldwide. Long non-coding RNAs (lncRNAs) have become vital regulators in many biological processes. However, few studies have shown that lncRNAs take part in the pathogenesis of C. trachomatis. Here, we used microarrays to study the expression profiles of lncRNAs and mRNAs in HeLa cells at 12, 24, and 40 hours pot-infection (hpi). Our study provides evidence that lncRNAs are involved in the interaction between C. trachomatis and hosts.

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Progesterone activates multiple innate immune pathways in Chlamydia trachomatis-infected endocervical cells

Project description:In this project we examined the in-vitro effect of female sex hormones (estradiol and progesterone at average physiological concentrations) during a infection mediated by Chlamydia trachomatis serovar D, on the gene expression of human endometrial cell line ECC-1 The effects of the female sex hormones progesterone and oestradiol while infected by Chlamydia trachomatis were examined at two timepoints.

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Genome-wide analysis of Chlamydia trachomatis-infected cells

Project description:Chlamydia trachomatis is the most common sexually transmitted infection and the bacterial agent of trachoma globally. C. trachomatis undergoes a biphasic developmental cycle involving an infectious elementary body and a replicative reticulate body. Little is currently known about the expression of host cell mRNAs, lncRNAs, and miRNAs at different stages of C. trachomatis development. Here, we performed RNA-seq and miR-seq on HeLa cells infected with C. trachomatis serovar E at 20 hpi and 44 hpi with or without IFN-γ treatment. Our study identified and validated differentially expressed host cell mRNAs, lncRNAs, and miRNAs during infection. Infection at 20 hpi showed the most differential upregulation of both coding and non-coding genes while infection at 44 hpi in the presence of IFN-γ resulted in a dramatic downregulation of a large proportion of genes. Using RT-qPCR, we validated the top 5 stage-specific upregulated mRNAs and miRNAs. One of the commonly expressed miRNAs at all three stages, miR-193b-5p, showed significant expression in clinical serum samples of C. trachomatis-infected patients as compared to sera from healthy controls and HIV-1-infected patients. Furthermore, at 20 hpi we observed significant upregulation of antigen processing and presentation, and T helper cell differentiation pathways whereas T cell receptor, mTOR, and Rap1 pathways were modulated at 44 hpi. Treatment with IFN-γ at 44 hpi showed the regulation of cytokine-cytokine receptor interaction, FoxO signaling, and Ras signaling pathways. Our study documents a role for the stage-specific transcriptional manipulation of the host cell genome and important signaling pathways that are necessary for the survival of pathogen and could serve as potential biomarkers in the diagnosis and management of the disease.

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Heat shock-induced transcriptomic response in Chlamydia trachomatis

Project description:Heat shock-induced transcriptomic response in Chlamydia trachomatis

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Transcriptional profiling of human epithelial cells infected with trachoma isolates of Chlamydia trachomatis

Project description:Hep-2C cells were infected with A/2497 or B/Tunis-864 strains of Chlamydia trachomatis to compare changes in host gene expression

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Plasmid-free Chlamydia trachomatis elicit lowered inflammation, delayed apoptosis, and reduced chemoattractant expression in HeLa cells compared to plasmid-containing wild type

Project description:Chlamydia trachomatis serovariants are responsible for either Trachoma, the leading cause of infectious blindness or sexually transmitted disease, wherein the endocervix is the most frequently infected site in women. Disease caused by Chlamydia typically involves chronic inflammation and scarring. Recent work with a live-attenuated A2497 plasmid deficient vaccine strain (A2497-) demonstrated protection in nonhuman primates against trachoma and a lack of measurable ocular pathology in A2497- infected monkeys. We therefore performed host cell transcriptome analysis of Hela cells infected with A2497 plasmid-containing (A2497) and A2497- Chlamydia over time. Our results indicate that relative to wild type A2497, the A2497- variant illicits a transcriptome response indicative of lowered inflammation response a delayed apoptosis response, a reduction in immune cell recruitement cytokine expression and a reduction in genes involved in cell proliferation and or fibrosis-like activities. The data provided here suggests a model that may explain how plasmid deficient chlamydia may provide an immuno-protective response without the pathology normally seen with plasmid-containing bacteria. Ct infection with and without plasmid time series

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Early transcriptional landscapes of Chlamydia trachomatis-infected epithelial cells at single cell resolution

Project description:Here we examined host cell gene expression in response to Chlamydia trachomatis infection by applying scRNA-Seq to in vitro C. trachomatis-infected HEp-2 epithelial cells and time-matched uninfected cells over the early chlamydial developmental cycle (3, 6 and 12 hours). We collected 264 single cells across both conditions all time points. The aims of the experiment were examining host cell responses to infection at single cell resolution, and identifying early host cell signatures of infection.

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