Abrupt and altered cell-type-specific DNA methylation profiles in blood during Acute HIV infection persists despite prompt initiation of ART
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE180130 | GEO | 2021/07/15
REPOSITORIES: GEO
Similar Datasets
Project description: Not available
| S-EPMC8386872 | biostudies-literature
Project description:HIV reservoirs persist despite successful antiretroviral therapy (ART) and are a major obstacle to the eradication and cure of HIV. The mature monocyte subset, CD14+CD16+, contributes to viral reservoirs and HIV-associated comorbidities. Only a subset of monocytes harbors HIV (HIV+), while the rest remain uninfected, exposed cells (HIVexp). We developed an innovative single cell RNA sequencing (scRNAseq) pipeline that detects HIV and host transcripts simultaneously, enabling us to examine differences between HIV+ and HIVexp mature monocytes. Using this, we characterized uninfected, HIV+, and HIVexp primary human mature monocytes with and without ART. We showed that HIV+ mature monocytes do not form their own cluster separately from HIVexp but can be distinguished by significant differential gene expression. We found that ART decreased levels of unspliced HIV transcripts potentially by modulating host transcriptional regulators shown to decrease viral infection and replication. We also identified and characterized mature monocyte subpopulations differentially impacted by HIV and ART. We identified genes dysregulated by ART in HIVexp monocytes compared to their uninfected counterpart and, of interest, the junctional protein ALCAM, suggesting that ART impacts monocyte functions. Our data provide a novel method for simultaneous detection of HIV and host transcripts. We identify potential targets, such as those genes whose expression is increased in HIV+ mature monocytes compared to HIVexp, to block their entry into tissues, preventing establishment/replenishment of HIV reservoirs even with ART, thereby reducing and/or eliminating viral burden and HIV-associated comorbidities. Our data also highlight the heterogeneity of mature monocyte subsets and their potential contributions to HIV pathogenesis in the ART era.
2020-07-08 | GSE153958 | GEO
Project description:Abrupt and altered cell-type-specific DNA methylation profiles in blood during Acute HIV infection persists despite prompt initiation of ART
| PRJNA746608 | ENA
Project description:A paired analysis of peripheral blood mononuclear cells (PBMCs) isolated before and after antiretroviral therapy (ART) from a robust number of HIV-infected patients (N=36). Results identify a total of 4,157 DEGs following ART in HIV-infected participants and the transition from a period of active virus replication before ART to one of viral suppression This study evaluated PBMC gene expression in cells from 36 (4 dropped from analysis) recently HIV-infected individuals to identify differentially expressed genes following 48 weeks of ART
2013-09-10 | E-GEOD-44228 | biostudies-arrayexpress
Project description:A small group of HIV-1-infected individuals, termed elite controllers (ECs), display control of HIV replication in the absence of antiretroviral therapy (ART). However, the mechanisms of resistance to HIV in ECs remains largely unknown. To identify host factors specific to the ECs that might be involved in controlling HIV infection, we performed RNA-seq transcriptome analysis, and a total of 44 samples were included. The monocytes from each sample were enriched, sequenced, and subjected to comparative transcriptome analysis to screen candidate genes that might affect resistance to HIV infection. we found several candidate genes with highly divergent expression that might contribute to the different outcomes of HIV infection in ECs and non-ECs. This finding will help elucidate the mechanisms by which ECs restrict HIV replication and represents a new approach for treatment of HIV.
2021-12-09 | GSE157198 | GEO
Project description:Background. HIV-infected individuals on antiretroviral therapy (HIV/ART) experience higher levels of non-AIDS morbidity than uninfected people, which is believed to be driven by inflammation that persists despite viral suppression. Elevations in plasma cytokines, coagulation markers and both innate and adaptive immune cell activation during untreated infection are often incompletely reversed by ART and associated with these morbidities. Monocytes/macrophages play a central role in many of these complications including neurocognitive and cardiovascular disease. Results. We investigated monocyte surface markers, gene expression and plasma cytokines in 11 HIV-infected older individuals (median age 53 years) who started therapy with low CD4 counts (median 129 cells/ul), with elevated hsCRP (≥2mg/L) despite long-term ART (median 7.4 years), along with age, gender, race and smoking status-matched controls. Major monocyte subsets (based on CD14/CD16/CD163) were not different from controls, but surface levels differed for CD163 (p=0.022), PD1 (p=0.015) and a trend for tissue factor (p=0.098). As a group, HIV/ART subjects had elevated levels of plasma CCL2 (MCP-1; p=0.0001), CXCL9 (MIG; p=0.04) and sIL2R (p=0.015), which were highly correlated, whereas sCD14 and several other markers were not significantly elevated. However, principal component analysis of soluble markers revealed that about half of HIV/ART subjects clustered with controls, whereas the remainder were distinct, driven by IL-10, CCL11, CXCL10, CXCL11 as well as CCL2, CXCL9 and sIL2R. Outlier subjects were significantly older than those who clustered with controls. Gene expression analysis unexpectedly revealed downregulation in HIV/ART monocytes of multiple genes linked to immune functions including inflammation, immune cell development and cell-cell signaling. Conclusions. These results reveal a novel pattern of immune dysregulation involving both aberrant inflammation and monocyte dysfunction, which suggests complex mechanisms linking monocytes and HIV/ART comorbidities.
2020-01-08 | GSE137438 | GEO
Project description:The comprehensive characterization and quantification of the HIV tissue reservoirs is required to design appropriate therapeutic intervention(s) to achieve a cure. While pioneering studies demonstrated that HIV replication and spreading mainly occur in lymphoid tissues, the identification of specific cell subsets harboring replication competent virus in lymphoid tissues has long been neglected. In this context, we and others have recently shown that gut memory CD4 T cells, lymph node T follicular helper (Tfh) cells and tissue macrophages represent major HIV/SIV tissue reservoirs. Notably, Tfh cell differentiation is a multi-stage process that requires long-lasting interactions with lymph node (LN) dendritic cells (DCs) and pre-germinal center B cells in a specific cytokine/chemokine microenvironment. Lymph node DCs are endowed with an exceptional T-cell stimulatory potential and can either migrate from the periphery to the draining lymph node (migratory DCs) or locate in the LN for their entire life span (resident DCs). On the basis of these unique properties, long-term persistence of LN DCs infected with replication competent virus may represent the initial trigger of viral rebound post ART interruption and may therefore represent a major obstacle to HIV cure. We demonstrate that LN migratory DCs are infected with replication competent virus and persist despite suppressive ART. In addition, we identified the mechanisms associated with i) LN DC susceptibility to HIV infection and ii) long term persistence of HIV-infected LN DCs i.e. proliferation of infected cells in tissue sanctuaries.
2023-09-13 | GSE196066 | GEO
Project description:A paired analysis of peripheral blood mononuclear cells (PBMCs) isolated before and after antiretroviral therapy (ART) from a robust number of HIV-infected patients (N=36). Results identify a total of 4,157 DEGs following ART in HIV-infected participants and the transition from a period of active virus replication before ART to one of viral suppression
2013-09-10 | GSE44228 | GEO
Project description:T cell dysfunction occurs early following HIV infection, impacting the emergence of non-AIDS morbidities and limiting curative efforts. ART initiated during primary HIV infection (PHI) can reverse this dysfunction, but the extent of recovery is unknown. We studied 66 HIV-infected individuals treated from early PHI with up to three years of ART. Compared with HIV-uninfected controls, CD4 and CD8 T cells from early HIV infection were characterised by T cell activation and increased expression of the immune checkpoint receptors (ICRs) PD1, Tim-3 and TIGIT. Three years of ART lead to partial – but not complete – normalisation of ICR expression, the dynamics of which varied for individual ICRs. For HIV-specific cells, epigenetic profiling of tetramer-sorted CD8 T cells revealed that epigenetic features of exhaustion typically seen in chronic HIV infection were already present early in PHI, and that ART initiation during PHI resulted in only a partial shift of the epigenome to one with more favourable memory characteristics. These findings suggest that although ART initiation during PHI results in significant immune reconstitution, there may be only partial resolution of HIV-related phenotypic and epigenetic changes.
2023-07-19 | GSE237729 | GEO
Project description:Next Generation Sequencing Facilitates Quantitative Analysis of HIV Elite controller, HIV ART, HIV ART-naive and healthy control Transcriptomes
| PRJNA660430 | ENA