Rhesus macaque SIV LCV Co infection Study
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ABSTRACT:
ORGANISM(S): Macaca mulatta
PROVIDER: GSE38918 | GEO | 2024/05/24
REPOSITORIES: GEO
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Project description:The study describes miRNA expression in Oropharyngeal tissue of chronically SIV-infected rhesus macaques. To identify the underlying molecular mechanisms we simultaneously profiled miRNA and mRNA expression in oropharyngeal tissues of chronically simian immunodeficiency virus (SIV)-infected rhesus macaques (RMs). Relative to controls, we identified 48 (38-upregulated and 10 downregulated) differentially expressed (DE) miRNAs relative to uninfected controls (n=5). Interestingly, in terms of magnitude, miR-19a, miR-301, miR-142-3p, miR-32 and miR-142-5p were among a select list of miRNAs that showed the highest upregulation in OPM. An important finding is the significant upregulation in OPM of miR-21, a microRNA known to regulate periodontitis, T-cell activation and oral carcinoma. Interestingly, RNA-seq for gene expression profiling also confirmed miR-21 upregulation in OPM of VEH-untreated/SIV rhesus macaques. Using TargetScan 7.2, we identified TSC22D3 (TSC22-domain family member 3), an anti-inflammatory protein induced by glucocorticoids and IL10 that was significantly downregulated in OPM of VEH-untreated/SIV macaques to be a predicted target of miR-29b. TSC22D3 localized to minor salivary gland acini and secretory ducts and showed reduced expression in OPM of VEH-untreated chronically SIV macaques. Using luciferase reporter and overexpression assays, we confirmed TSC22D3 to be a direct target of miR-29b. Interestingly, expression of miR-150 was significantly downregulated, a miRNA we previously demonstrated to be downregulated during T cell activation in the intestine. These findings strongly support a role for differential miRNA expression associated with HIV/SIV induced oropharyngeal mucosal dysfunction.
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Project description:Cannabinoid administration before and after simian immunodeficiency virus (SIV)-inoculation ameliorated disease progression and decreased inflammation in male rhesus macaques. Δ9-tetrahydrocannabinol (Δ9-THC) did not increase viral load in brain tissue or produce additive neuropsychological impairment in SIV-infected macaques. To determine if the neuroimmunomodulation of Δ9-THC involved differential microRNA (miR) expression, miR expression in the striatum of uninfected macaques receiving vehicle (VEH) or Δ9-THC (THC) and SIV-infected macaques administered either vehicle (VEH/SIV) or Δ9-THC (THC/SIV) was profiled using next generation deep sequencing.
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Project description:Rhesus macaques (RMs) inoculated with live-attenuated Rev-Independent Nef¯ simian immunodeficiency virus (Rev-Ind Nef¯SIV) as adults or neonates controlled viremia to undetectable levels and showed no signs of immunodeficiency over 6-8 years of follow-up. We tested the capacity of this live-attenuated virus to protect RMs against pathogenic, heterologous SIVsmE660 challenges Blood PBMC Time after SIV infection: 2 weeks post SIV infection Infection:Rev-Ind Nef¯SIV
2013-08-09 | E-GEOD-49663 | biostudies-arrayexpress
Project description:Salmonella enterica serotype Typhimurium cause a localized enteric infection in immunocompetent patients while human immunodeficiency virus (HIV)-infected patients develop a life threatening bacteremia. We used a rhesus macaque ileal loop model to study how simian immunodeficiency virus (SIV) infection triggers defects in mucosal barrier function that enhance S. Typhimurium dissemination. SIV infection resulted in significant depletion of CD4+ T cells in the intestinal mucosa. Gene expression profiling revealed a defective TH17 response (with suppression of IL-17 and IL-22 expression) and impaired homeostasis of the intestinal epithelium in SIV-infected animals during NTS infection. These findings correlated with an impaired ability of lamina propria CD4+ T cells from SIV-infected macaques to produce IL-17 upon ex vivo stimulation, while production of IFNï§ was not affected. This cytokine imbalance in SIV-infected animals was associated with reduced expression of genes required for intestinal epithelial maintenance and repair, increased fluid secretion during NTS infection, epithelial damage and translocation of a non-invasive S. Typhimurium mutant. Although no defects in neutrophil recruitment were noted, the ileum of SIV-infected animals contained lower levels of the enzyme myeloperoxidase, which may indicate defects in neutrophil killing capacity. S. Typhimurium was recovered in markedly increased numbers from the mesenteric lymph nodes of SIV-infected macaques, illustrating the increased potential for systemic dissemination during co-infection. Our data suggest that SIV-infection causes a multi-factorial defect in mucosal barrier function that promotes bacterial dissemination. Keywords: Disease state analysis Comparison of ileal gene expression profiles in SIV infected rhesus macaques in response to Salmonella challange.
2010-05-26 | E-GEOD-10567 | biostudies-arrayexpress
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2014-09-26 | E-GEOD-61766 | biostudies-arrayexpress
Project description:Impact of CD8 depletion on peripheral CD4+ T cells transcriptome during ART-treated SIV infection of rhesus macaques. Analysis of CD8+ T cells, CD4+ T cells, and NK cell transcriptomes following administration of HIV/SIV latency reversing agent IL-15 superagonist N-803 in ART-suppressed SIV infected rhesus macaques. Methods: RNA-Seq of sorted CD4+ T cells from SIV-infected, ART-suppressed rhesus macaques before intervention with the anti-CD8a depleting antibody MT807R1 and then again on day 3, week 2, and week 4 following the start of intervention. Some animals also had an intervention that includes four weekly administrations of the IL-15 superagonist complex N-803 initiated at the time of CD8 depletion. Methods: RNA-Seq of sorted CD4+ T cells, CD8+ T cells, and NK cells from SIV-infected, ART-suppressed rhesus macaques before intervention with four weekly administrations of the IL-15 superagonist complex N-803, then again on day 3, week 2, and week 4 following the start of intervention. Methods: RNA from sorted cells was collected and extracted and DNA was digested. Libraries were prepared and normalized, pooled, and clustered on a flow cells for sequencing. RNAseq data were aligned to the MacaM v7.8 assembly of the Indian rhesus macaque genome. To identify pathways differentially modulated, Gene Set Enrichment Analysis (GSEA)34 was performed on the ranked transcript lists using 1000 phenotype permutations and random seeding. Gene sets used included the MSigDB H (hallmark) gene sets
2020-01-06 | GSE128415 | GEO
Project description:Immunization of macaques with simian immunodeficiency virus with deletions in nef (SIVΔnef) has been shown to elicit protective immunity to infection by pathogenic SIV, yet our understanding of the mechanisms that orchestrate protection and prevent pathogenesis remains limited. In the study, we utilize whole-genome transcriptional profiling to reveal molecular signatures of protective immunity in circulating CD8+ T cells of rhesus macaques vaccinated with SIVmac239Δnef and challenged with pathogenic SIVmac251. Microarrays were used to characterize changes in gene expression in blood CD8+ T cells that occur following vaccination of rhesus macaques with attenuated SIV∆nef and subsequent challenge with pathogenic SIVmac251, in comparison to corresponding changes in healthy controls and unvaccinated animals infected with pathogenic SIVmac251
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Project description:The objectives of this study were to determine the molecular mechanisms of host response during transition from primary to chronic SIV infection in the oral mucosa of rhesus macaques Transcriptioinal profiles were determined for 2 rhesus macaques infected for 6 wk with SIVmac251 and compared to profiles of 3 uninfected healthy controls
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Project description:Molecular basis for CNS dysfunction in simian immunodeficiency virus-infected rhesus monkeys. We used microarrays to identify differentially expressed genes in chronic simian immunodeficiency virus-infected rhesus monkeys. Frontal lobe samples were obtained from control and SIV infected animals for RNA extraction and hybridization on Affymetrix microarrays. We sought to better understand the gene that changes in gene expression with SIV infection in the frontal lobe.
2012-01-29 | E-GEOD-35397 | biostudies-arrayexpress
Project description:In SIV/HIV infection, the gastrointestinal tissue dominates as an important site due to the impact of massive mucosal CD4 depletion and immune activation-induced tissue pathology. Unlike AIDS-susceptible rhesus macaques, natural hosts do not progress to AIDS and resolve immune activation earlier. Here, we examine the role of dendritic cells in mediating immune activation and disease progression. We demonstrate that plasmacytoid dendritic cells (pDC) in the blood upregulate ?7-integrin and are rapidly recruited to the colorectum following a pathogenic SIV infection in rhesus macaques. These pDC were capable of producing proinflammatory cytokines and primed a Tc1 response in vitro. Consistent with the upregulation of ?7-integrin on pDC, in vivo blockade of ?4?7-integrin dampened pDC recruitment to the colorectum and resulted in reduced immune activation. The upregulation of ?7-integrin expression on pDC in the blood was also observed in HIV-infected humans but not in chronically SIV-infected sooty mangabeys that show low levels of immune activation. Our results uncover a new mechanism by which pDC influence immune activation in colorectal tissue following pathogenic immunodeficiency virus infections. SIV negative controls (n=4) and week 12 post SIV infected (n=4) groups of Rhesus macaques and SIV negative controls (n=4) and week 55 post SIV infected (n=4) groups of Sooty mangabeys colorectal tissue biopsies were collected in to RNA later reagent (Qiagen) and were homogenized with syringe and needle method. RNA was extracted with Rneasy mini kit (Qiagen) and was used for microarray experiments. Rhesus GeneChip assays were performed in the Yerkes Microarray Core Facility (www.microarray.emory.edu) , one of the Affymetrix Microarray Core Labs.The 0.5µg of total RNA sample was analyzed on Rhesus Macaque Genome GeneChip that consists of over 52,000 probe sets (Affymetrix, Santa Clara, CA). Target RNA labeling, hybridization and post-hybridization processing were performed following the Affymetrix GeneChip Expression Analysis standard protocols. In brief, The 5 ?g of RNA sample was first reverse-transcribed using T7-Oligo(dT) Promoter Primer and SuperScript II in the first-strand cDNAs synthesis reaction. Following RNase H-mediated second-stranded cDNA synthesis, the double-stranded cDNAs were purified by use of a GeneChip sample clean-up module and served as templates in the generation of biotinylated complementary RNAs (cRNAs) in the presence of T7 RNA Polymerase and a biotinylated nucleotide analog/ribonucleotide mix by in vitro transcription (IVT) reaction. The biotinylated cRNAs were cleaned up, fragmented, and hybridized to the rhesus macaque expression arrays at 45°C for 16 h with constant rotation at 60 rpm. The gene chips were then washed and stained with Affymetrix fluidics stations 450 and scanned on Affymetrix scanner 3000. The images are processed to collect raw data with GeneChip Operating Software (GCOS) 1.4. Tissue: Colorectal tissue Time after SIV infection: 12 weeks for SIV infected Rhesus macaques, 55 weeks for Sooty mangabeys Infection: SIVmac251 infection for Rhesus macaques, SIVsm infection for Sooty mangabeys
2011-09-05 | E-GEOD-29980 | biostudies-arrayexpress