Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1088911 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR28369527_1.fastq.gz | Fastqsanger.gz | |||
| SRR28369528_1.fastq.gz | Fastqsanger.gz | |||
| SRR28369529_1.fastq.gz | Fastqsanger.gz | |||
| SRR28369530_1.fastq.gz | Fastqsanger.gz | |||
| SRR28369531_1.fastq.gz | Fastqsanger.gz |
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Project description:Sexually transmitted infections (STIs) are commonly reported among HIV-1 infected patients. The increasing prevalence of the most common STI, Chlamydia trachomatis (CT), among HIV-1 infected people suggests a role in HIV-1 infectivity. However, the mechanisms modulating the enhancement of HIV-1 infectivity during HIV-1/STIs coinfection remain elusive. The stimulation of CD4 T cells during CT infection may modulate the expression of specific genes, which in turn enhance the susceptibility and infectivity of CT-specific CD4 T cells to HIV-1 infection. After three days of CT stimulation of PBMCs followed by 3 days of HIV-1 infection, we observed a significant increase in HIV-1 p24 levels among clinically diagnosed C. trachomatis-infected patients as compared to cells from healthy donors. Similarly, ex vivo CT antigen-stimulated PBMCs from healthy donors showed enhanced susceptibility to HIV-1 as compared to unstimulated PBMCs. CT-specific CD4 T cells also harbour more HIV-1 copy numbers as compared to healthy unstimulated CD4 T cells. RNA-seq data revealed the upregulation of CCR chemokine receptors and cytokines in CD4 T cells from CT-stimulated CD4 T cells infected with HIV-1.
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Project description:Introduction: HIV infection causes pathologic changes in the natural killer (NK) cell compartment that can be only partially restored by antiretroviral therapy (ART). We investigated NK cells phenotype and function in children with perinatally acquired HIV (PHIV) and long term viral control (5years) due to effective ART in a multicentre cross-sectional study (CARMA, EPIICAL consortium). The impact of age at ART start and viral reservoir was also evaluated. Methods: Peripheral Blood Mononuclear Cells (PBMCs) from 40 PHIV that started ART within two years of life (early treated patients, ET ≤ 6 months; late treated patients, LT > 6 months), with at least five years of HIV-1 suppression (< 40 HIV copies/ml), were collected between November 2017 and August 2018. NK phenotype and function were analysed by flow cytometry and transcriptional profile of PBMCs by RNA-Seq. HIV-1 DNA was measured by real-time PCR. Data were analysed by Spearman correlation plots and multivariable Poisson regression model (adjusted for baseline %CD4 and RNA HIV viral load and for age at ART start as interaction term, either ET or LT) to explore the association between NK cell parameters and HIV reservoir modulated by age at ART start. Results: A significantly higher frequency of CD56neg NK cells was found in LT compared with ET. We further found in LT a positive correlation of CD56neg NK with HIV-1 DNA. LT also displayed increased expression of the NKG2D and NKp46 activating receptors and perforin compared with ET. Moreover, CD107a+ and IFN-γ+ frequencies in non-stimulated NK were associated with HIV-1 DNA in LT patients. Finally, RNA-Seq analysis showed in LT an upregulation of genes related to NK activating pathways and susceptibility to apoptosis compared with ET. Conclusions: We show that ET present a preserved NK compartment compared with LT, which is associated with lower HIV-1 reservoir and persist despite long-term viral control due to effective ART.
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