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Long noncoding RNA MIR4435-2HG enhances metabolic function of myeloid dendritic cells from HIV-1 elite controllers (Cut&Run)

ABSTRACT: Long noncoding RNA MIR4435-2HG enhances metabolic function of myeloid dendritic cells from HIV-1 elite controllers (Cut&Run)

PROVIDER: PRJNA704964 | ENA |

REPOSITORIES: ENA

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Long noncoding RNA MIR4435-2HG enhances metabolic function of myeloid dendritic cells from HIV-1 elite controllers (Cut&Run)

Project description:Restriction of HIV-1 replication in elite controllers (ECs) is frequently attributed to T cell-mediated immune responses, while the specific contribution of innate immune cells is less clear. Here, we demonstrated an upregulation of the host long non-coding RNA (lncRNA) MIR4435-2HG in primary myeloid dendritic cells (mDc) from ECs. Elevated expression of this lncRNA in mDCs was associated with a distinct immunometabolic profile, characterized by increased oxidative phosphorylation and glycolysis activities in response to TLR3 stimulation. Using functional assays, we showed that MIR4435-2HG directly influenced the metabolic state of mDCs, likely through epigenetic mechanisms involving H3K27ac enrichment at an intronic enhancer in the RPTOR gene locus, the main component of the mammalian target of rapamycin complex 1 (mTORC1). Together, these results suggested a role of MIR4435-2HG for enhancing immunometabolic activities of mDCs in ECs through targeted epigenetic modifications of a member of the mTOR signaling pathway.

2021-05-03 | GSE167563 | GEO

Long noncoding RNA MIR4435-2HG enhances metabolic function of myeloid dendritic cells from HIV-1 elite controllers (RNAseq)

2021-05-03 | GSE167564 | GEO

MicroRNAs differentially present in the plasma of HIV elite controllers

Project description:Elite controllers maintain HIV-1 viral loads below the limit of detection. The mechanisms responsible for this phenomenon are poorly understood. As microRNAs (miRNAs) are regulators of gene expression and some of them modulate HIV infection, we have studied the miRNA profile in plasma from HIV elite controllers and chronically infected individuals and compared against healthy donors. Several miRNAs correlate with CD4+ T cell count or with the known time of infection. No significant differences were observed between elite controllers and healthy donors; however, 16 miRNAs were different in the plasma of chronic infected versus healthy donors. In addition, levels of hsa-miR-29b-3p, hsa-miR-33a-5p and hsa-miR-146a-5p were higher in plasma from elite controllers than chronic infected and hsa-miR-29b-3p and hsa-miR-33a-5p overexpression significantly reduced the viral production in MT2 cells. Therefore, levels of circulating miRNAs might be of diagnostic and/or prognostic value for HIV infection. Additionally, hsa-miR-29b-3p and miR-33a-5p may be used in therapeutic strategies. An exploratory cross-sectional study of microRNA levels in EDTA plasma samples. Plasma samples were obtained from 24 subjects and were classified in 3 groups, 9 Elite Controllers (defined as individuals with plasma viral load (PVL) < 50 copies/ml, CD4 count >350/ml), 9 chronic HIV patients (CH) under anti-retroviral treatment and 6 healthy HIV negative donors (HD). This study was approved by the HuM-CM-)sped Foundation Ethics Committee and informed consent was obtained from all subjects.

2014-08-04 | E-GEOD-58868 | biostudies-arrayexpress

MicroRNAs differentially present in the plasma of HIV elite controllers

2014-08-04 | GSE58868 | GEO

IL-15-DEPENDENT IMMUNE CROSS-TALK BETWEEN NK CELLS AND DENDRITIC CELLS IN HIV-1 ELITE CONTROLLERS [CUT&RUN]

Project description:As the principal effector cell population of the innate immune system, NK cells may make critical contributions to natural, immune-mediated control of HIV-1 replication. Using genome-wide assessments of activating and inhibitory epigenetic chromatin features, we here demonstrate that cytotoxic NK (cNK) cells from elite controllers (ECs) frequently display elevated activating histone modifications at the IL-2/IL-15 receptor β chain and the BCL-2 gene loci. These epigenetic changes translated into increased responsiveness of cNK cells to paracrine IL-15 secretion, which coincided with higher levels of IL-15 transcription by myeloid dendritic cells in ECs. The distinct immune crosstalk between these two innate immune cell populations resulted in improved IL-15-dependent cNK cell survival, paired with a metabolic profile biased towards IL-15-mediated glycolytic activities. Together, these results suggest that cNK cells from ECs display an epigenetically-programmed IL-15 response signature, and support the emerging role of innate immune pathways in natural, drug-free control of HIV-1.

2023-12-06 | GSE232915 | GEO

Long noncoding RNA MIR4435-2HG enhances metabolic function of myeloid dendritic cells from HIV-1 elite controllers

Project description:Long noncoding RNA MIR4435-2HG enhances metabolic function of myeloid dendritic cells from HIV-1 elite controllers

| PRJNA704963 | ENA

Bulk Cut&run and Cut&tag

Project description:Bulk Cut&run and Cut&tag

| PRJNA686390 | ENA

Long noncoding RNA MIR4435-2HG enhances metabolic function of myeloid dendritic cells from HIV-1 elite controllers (RNAseq)

Project description:Long noncoding RNA MIR4435-2HG enhances metabolic function of myeloid dendritic cells from HIV-1 elite controllers (RNAseq)

| PRJNA704965 | ENA

Sorted Bulk and KK10-specific CD8+ T cells from HLA-B*2705 HIV elite controllers before and after KK10 peptide stimulation

Project description:CD8+ T cells from HLA-B*2705 HIV+ elite controllers Hi and Lo samples are CD8+ T cells bound by an HLA-B*2705 tetramer specific for the Gag p24 peptide KK10

2014-04-23 | GSE56971 | GEO

Metabolic pathway activation distinguish transcriptional signatures of CD8+ T cells from HIV-1 elite controllers

Project description:Elite controllers (EC), defined as persons maintaining undetectable levels of HIV-1 replication in the absence of antiretroviral therapy, represent living evidence that sustained, natural control of HIV-1 is possible, at least in relatively rare instances. Understanding the complex immunologic and virologic characteristics of these specific patients holds promise for inducing drug-free control of HIV-1 in broader populations of HIV-1 infected patients.

2018-08-01 | GSE87620 | GEO

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