HIV-1 Tat modifies expression of host genes in B cells
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA756690 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR15559305.fastq.gz | Fastqsanger.gz | |||
| SRR15559306.fastq.gz | Fastqsanger.gz | |||
| SRR15559307.fastq.gz | Fastqsanger.gz | |||
| SRR15559308.fastq.gz | Fastqsanger.gz | |||
| SRR15559309.fastq.gz | Fastqsanger.gz |
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Project description:We carried out genome-wide analysis of cellular gene expression changes in response to ectopic expression of HIV-1 Tat and mutant TatC22G proteins.
2022-03-07 | GSE182538 | GEO
Project description:Purpose: To investigate the impact of HIV protein Tat on macrophage transcriptome related to atherosclerosis development Methods: Peritoneal macrophages were isolated from myeloid specific IKKβ deficient LDLR-/- (IKKβΔMyeLDLR-/-) mice and their littermates (IKKβF/FLDLR-/-). Then the macrophages were treated with HIV protein Tat or control for 12 hr. Total RNA was extracted for RNAseq Results: HIV protein Tat treatment induces 2640 differentially expressed genes (DEGs) with false discovery rate (FDR) < 1 % and fold change > 3 in control macrophages. Those DEGs enriched in several biological processes that may contribute to atherogenesis. FAIME analysis demonstrated higher geneset scores of those GO terms in the Tat-treated macrophages from IKKβF/FLDLR-/- mice compared with the control ones. IKKβ deletion resulted in loss of geneset score in the macrophages of IKKβΔMyeLDLR-/- treated with HIV Tat. Conclusions: These results indicate that HIV protein Tat may affect many genes in macrophages related atherosclerosis development through IKKβ signaling.
2021-07-21 | GSE157833 | GEO
Project description:Our previous work demonstrated that HIV-1 infection progressively reduces TCR/CD3 expression due to a defect in CD3g gene transcripts. We further found that knocking down expression of the viral tat and/or nef genes was correlated with CD3g transcript and TCR/CD3 surface receptor levels on HIV-1 infected cells. This study was undertaken to investigate the direct effect of HIV-1 Tat expression on the TCR/CD3 machinery. Progressive downregulation from TCR/CD3hi to TCR/CD3lo to TCR/CD3− was observed on Tat expressing cells in a manner that emulated HIV-1 infection, with a lack of CD3g transcripts again responsible for the defect. When Tat cell cultures containing a mixture of TCR/CD3 surface densities were separated into TCR/CD3hi and TCR/CD3lo/− populations, they quickly reverted to a mixed CD3 phenotype. Thus, the progression TCR/CD3hi to TCR/CD3lo to TCR/CD3− is an active, reversible process with receptor levels fluctuating in response to intracellular dynamics. Examination of tat mutants found that the regions involved in Tat-mediated transactivation and TAR binding are required for TCR/CD3 downregulation while the lysine at position 28 and Tat exon 2 are dispensable. Global gene expression, assessed in association with TCR/CD3 downregulation in HIV-1 infected and Tat expressing cells, detected broad suppression of TCR/CD3 signaling, co-stimulation and negative regulatory genes along with target transcription factors, ligands and receptors. A significant subset of the genes altered in HIV-1 infected cells was specifically targeted by Tat in association with TCR/CD3 loss. Our finding that Tat negatively regulates many facets of the TCR/CD3 machinery has important implications for disease pathogenesis. We used microarrays to investigate changes in CD4+ T cell gene expression induced by expression of the HIV-1 Tat protein.
2015-12-31 | GSE33705 | GEO
Project description:The HIV regulatory protein Tat enhances viral transcription but also modifies host gene expression, affecting cell functions like cell cycle and apoptosis. Cohort studies indicate that, despite virological suppression, people with HIV (PWH) are at increased risk of comorbidities linked to chronic inflammation, accelerated immune-aging and cellular senescence, sometimes associated with abnormal genomic methylation patterns. In this study, we analyzed whether Tat influences DNA methylation and subsequently impact the transcriptional signature, contributing to inflammation and accelerated aging. To this aim, Jurkat cells were transfected with full-length Tat (Tat101), Tat’s first exon (Tat72), or an empty vector (TetOFF) and DNA methylation changes were assessed. Differentially expressed genes (DEG) were identified via RNA-seq. Results showed that Tat101 expression resulted in major hyper- and hypomethylations changes at individual CpG sites resulting in a slightly global DNA hypermethylation. Methylation changes at gene promoters and bodies resulted in altered gene expression, specifically regulating gene transcription in 5.1% of DEG in Tat101 expressing cells. In contrast Tat72 had a minimal impact on this epigenetic process. The observed differentially methylated and expressed genes were involved in inflammatory responses, lipid antigen presentation, and apoptosis, and may constitute a key epigenetic mechanism contributing to HIV pathogenesis and chronic inflammation.
2025-02-17 | GSE282526 | GEO
Project description:The HIV-1 Trans-Activator of Transcription (Tat) protein binds to multiple host cellular factors and greatly enhances the level of transcription of the HIV genome. Here, we report the genome-wide binding map of Tat to the human genome in Jurkat T cells (Jurkat-Tat cells) using chromatin immunoprecipitation combined with next-generation sequencing. cDNA microarray was used to monitor gene expression changes between Jurkat and Jurkat-Tat cells. Additionally, we compared distribution of H3K9ac near gene promoters between Jurkat and Jurkat-Tat cells using ChIP-chip method and hybridized onto Agilent promoter array. Our data reveal that Tat’s interaction with the host genome is more extensive than previously thought, with potentially important implications for the viral life cycle. Agilent gene expression microarray was used to compare gene expression changes between Jurkat T cells and Jurkat T cells expressing HIV-Tat protein (Jurkat-Tat T cells) Expression profiles on Jurkat-Tat cells versus Jurkat cells. ChIP on chip for H3K9ac in Jurkat-Tat versus Jurkat cells. ChIP-seq for HIV-1 Tat protein in Jurkat-Tat cells.
2011-11-06 | E-GEOD-30734 | biostudies-arrayexpress
Project description:Our previous work demonstrated that HIV-1 infection progressively reduces TCR/CD3 expression due to a defect in CD3g gene transcripts. We further found that knocking down expression of the viral tat and/or nef genes was correlated with CD3g transcript and TCR/CD3 surface receptor levels on HIV-1 infected cells. This study was undertaken to investigate the direct effect of HIV-1 Tat expression on the TCR/CD3 machinery. Progressive downregulation from TCR/CD3hi to TCR/CD3lo to TCR/CD3â was observed on Tat expressing cells in a manner that emulated HIV-1 infection, with a lack of CD3g transcripts again responsible for the defect. When Tat cell cultures containing a mixture of TCR/CD3 surface densities were separated into TCR/CD3hi and TCR/CD3lo/â populations, they quickly reverted to a mixed CD3 phenotype. Thus, the progression TCR/CD3hi to TCR/CD3lo to TCR/CD3â is an active, reversible process with receptor levels fluctuating in response to intracellular dynamics. Examination of tat mutants found that the regions involved in Tat-mediated transactivation and TAR binding are required for TCR/CD3 downregulation while the lysine at position 28 and Tat exon 2 are dispensable. Global gene expression, assessed in association with TCR/CD3 downregulation in HIV-1 infected and Tat expressing cells, detected broad suppression of TCR/CD3 signaling, co-stimulation and negative regulatory genes along with target transcription factors, ligands and receptors. A significant subset of the genes altered in HIV-1 infected cells was specifically targeted by Tat in association with TCR/CD3 loss. Our finding that Tat negatively regulates many facets of the TCR/CD3 machinery has important implications for disease pathogenesis. We used microarrays to investigate changes in CD4+ T cell gene expression induced by expression of the HIV-1 Tat protein. Examine changes in gene expression in HIV-1 Tat transduced cells compared with cells transduced with an antisense Tat sequence used as a control.
2015-12-31 | E-GEOD-33705 | biostudies-arrayexpress
Project description:The HIV-1 Trans-Activator of Transcription (Tat) protein binds to multiple host cellular factors and greatly enhances the level of transcription of the HIV genome. Here, we report the genome-wide binding map of Tat to the human genome in Jurkat T cells (Jurkat-Tat cells) using chromatin immunoprecipitation combined with next-generation sequencing. cDNA microarray was used to monitor gene expression changes between Jurkat and Jurkat-Tat cells. Additionally, we compared distribution of H3K9ac near gene promoters between Jurkat and Jurkat-Tat cells using ChIP-chip method and hybridized onto Agilent promoter array. Our data reveal that Tat’s interaction with the host genome is more extensive than previously thought, with potentially important implications for the viral life cycle. Expression profiles on Jurkat-Tat cells versus Jurkat cells. ChIP on chip for H3K9ac in Jurkat-Tat versus Jurkat cells. ChIP-seq for HIV-1 Tat protein in Jurkat-Tat cells.
2011-11-06 | E-GEOD-30736 | biostudies-arrayexpress
Project description:The HIV regulatory protein Tat enhances viral transcription but also modifies host gene expression, affecting cell functions like cell cycle and apoptosis. Cohort studies indicate that, despite virological suppression, people with HIV (PWH) are at increased risk of comorbidities linked to chronic inflammation, accelerated immune-aging and cellular senescence, sometimes associated with abnormal genomic methylation patterns. In this study, we analyzed whether Tat influences DNA methylation and subsequently impact the transcriptional signature, contributing to inflammation and accelerated aging. To this aim, Jurkat cells were transfected with full-length Tat (Tat101), Tat’s first exon (Tat72), or an empty vector (TetOFF) and DNA methylation changes were assessed. Differentially expressed genes (DEG) were identified via RNA-seq. Results showed that Tat101 expression resulted in major hyper- and hypomethylations changes at individual CpG sites resulting in a slightly global DNA hypermethylation. Methylation changes at gene promoters and bodies resulted in altered gene expression, specifically regulating gene transcription in 5.1% of DEG in Tat101 expressing cells. In contrast Tat72 had a minimal impact on this epigenetic process. The observed differentially methylated and expressed genes were involved in inflammatory responses, lipid antigen presentation, and apoptosis, and may constitute a key epigenetic mechanism contributing to HIV pathogenesis and chronic inflammation.
2025-02-17 | GSE282545 | GEO
Project description:The HIV-1 Trans-Activator of Transcription (Tat) protein binds to multiple host cellular factors and greatly enhances the level of transcription of the HIV genome. Here, we report the genome-wide binding map of Tat to the human genome in Jurkat T cells (Jurkat-Tat cells) using chromatin immunoprecipitation combined with next-generation sequencing. cDNA microarray was used to monitor gene expression changes between Jurkat and Jurkat-Tat cells. Additionally, we compared distribution of H3K9ac near gene promoters between Jurkat and Jurkat-Tat cells using ChIP-chip method and hybridized onto Agilent promoter array. Our data reveal that TatM-CM-"M-BM-^@M-BM-^Ys interaction with the host genome is more extensive than previously thought, with potentially important implications for the viral life cycle. Expression profiles on Jurkat-Tat cells versus Jurkat cells. ChIP on chip for H3K9ac in Jurkat-Tat versus Jurkat cells. ChIP-seq for HIV-1 Tat protein in Jurkat-Tat cells.
2011-11-06 | E-GEOD-30738 | biostudies-arrayexpress
Project description:Herein expression trends of host miRNA were measured in CEMx174 lymphocytes infected with HIV-1NL4-3 or derivative strains deficient in Tat RSS activity (RSS) or vif-/vpr (VV), or unexposed to virus. As expected from previous studies, miRNA trends were different in naive and HIV-1 infected cells. Moreover, miRNA expression trends were similar for HIV-1 and vif-/vpr-deficient HIV-1, but diverged for RSS. Rather than generalized changes in miRNA levels, HIV-1 bearing the Tat K51A RSS mutation changed the steady state of a subset of miRNAs. The results are attributable to reduction in miRNA stability or change in miRNAs activity that altered steady state expression. Comparison of the miRNA expression trends in patient PBMC and the CEMx174 lymphocytes determined >50% overlap with a subset of miRNAs identified in patients, supporting the utility of HIV-1 cell culture model to refine experimental design with patient samples, which represent miRNA profiles of co-isolated infected and uninfected cells. Our results indicate that ablation of Tat RNA silencing suppressor activity in HIV-1 changes the steady state of a subset of host mature miRNA. The observation reinforces the concept of active HIV-1 interplay with host small RNAs that modulate replication and spread. The study validated the utility of derivative HIV-1 strains to explore the interface of viral genes with host small RNA activity. In this study the microRNA profiles of CEMx174 cells infected with HIV-1 NL4-3 or derivative viruses deficient in Vif/Vpr or Tat RNA silencing suppressor activity were compared to mock infected cells. The samples were analyzed in duplicate.
2011-03-01 | E-GEOD-21892 | biostudies-arrayexpress