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hiv miRNA microRNA

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https://www.readbyqxmd.com/read/28717424/low-active-loading-of-cargo-into-engineered-extracellular-vesicles-results-in-inefficient-mirna-mimic-delivery
#1
Dhruvitkumar S Sutaria, Jinmai Jiang, Ola A Elgamal, Steven M Pomeroy, Mohamed Badawi, Xiaohua Zhu, Ryan Pavlovicz, Ana Clara P Azevedo-Pouly, Jeffrey Chalmers, Chenglong Li, Mitch A Phelps, Thomas D Schmittgen
Extracellular vesicles (EVs) hold great potential as novel systems for nucleic acid delivery due to their natural composition. Our goal was to load EVs with microRNA that are synthesized by the cells that produce the EVs. HEK293T cells were engineered to produce EVs expressing a lysosomal associated membrane, Lamp2a fusion protein. The gene encoding pre-miR-199a was inserted into an artificial intron of the Lamp2a fusion protein. The TAT peptide/HIV-1 transactivation response (TAR) RNA interacting peptide was exploited to enhance the EV loading of the pre-miR-199a containing a modified TAR RNA loop...
2017: Journal of Extracellular Vesicles
https://www.readbyqxmd.com/read/28639194/rnaa-induced-by-tata-box-targeting-micrornas
#2
Yijun Zhang, Hui Zhang
Recent studies reveal that some nuclear microRNAs (miRNA) and synthesized siRNAs target gene promoters to activate gene transcription (RNAa). Interestingly, our group identified a novel HIV-1-encoded miRNA, miR-H3, which targets specifically the core promoter TATA box of HIV-1 and activates viral gene expression. Depletion of miR-H3 significantly impaired the replication of HIV-1. miR-H3 mimics could activate viruses from CD4(+) T cells isolated from patients receiving suppressive highly active antiretroviral therapy, which is very intriguing for reducing HIV-1 latent reservoir...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28594894/micrornas-upregulated-during-hiv-infection-target-peroxisome-biogenesis-factors-implications-for-virus-biology-disease-mechanisms-and-neuropathology
#3
Zaikun Xu, Eugene L Asahchop, William G Branton, Benjamin B Gelman, Christopher Power, Tom C Hobman
HIV-associated neurocognitive disorders (HAND) represent a spectrum neurological syndrome that affects up to 25% of patients with HIV/AIDS. Multiple pathogenic mechanisms contribute to the development of HAND symptoms including chronic neuroinflammation and neurodegeneration. Among the factors linked to development of HAND is altered expression of host cell microRNAs (miRNAs) in brain. Here, we examined brain miRNA profiles among HIV/AIDS patients with and without HAND. Our analyses revealed differential expression of 17 miRNAs in brain tissue from HAND patients...
June 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28553929/silencing-of-hiv-1-by-agoshrna-molecules
#4
E Herrera-Carrillo, A Harwig, B Berkhout
RNA interference (RNAi) is a sequence-specific gene silencing mechanism that is triggered by the expression of a short hairpin RNA (shRNA). shRNA molecules enter the RNAi pathway at the Dicer processing step. Recent studies indicated that the cellular microRNA (miRNA) miR-451 is not recognized by Dicer, but that is processed instead by the Argonaute 2 (Ago2) protein. Subsequently, Dicer-independent shRNAs were described that rely on Ago2 for processing as well as the subsequent silencing step. We called these AgoshRNA molecules because they depend on Ago2 both for maturation and activation...
May 29, 2017: Gene Therapy
https://www.readbyqxmd.com/read/28452924/genome-wide-analyses-of-microrna-profiling-in-interleukin-27-treated-monocyte-derived-human-dendritic-cells-using-deep-sequencing-a-pilot-study
#5
Xiaojun Hu, Qian Chen, Bharatwaj Sowrirajan, Marjorie Bosche, Tomozumi Imamichi, Brad T Sherman
MicroRNAs (miRNAs) regulate gene expression and thereby influence cell fate and function. Recent studies suggest that an abundant class of miRNAs play important roles in immune cells, such as T cells, natural killer (NK) cells, B cells, and dendritic cells (DCs). Interleukin (IL)-27 is a member of the IL-12 family of cytokines with broad anti-viral effects. It is a potent inhibitor of HIV-1 infection in CD4+ T cells and macrophages, as well as monocyte-derived immature dendritic cells (iDCs). This pilot study compared miRNA profiles between iDCs and IL-27-treated iDCs (27DCs) using deep sequencing methods and identified 46 known miRNAs that were significantly differentially expressed in 27DCs: 36 were upregulated and 10 downregulated by IL-27...
April 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28303346/high-throughput-sequencing-identifies-hiv-1-replication-and-latency-related-mirnas-in-cd4-t-cell-lines
#6
Xiangyun Lu, Jin Yang, Haibo Wu, Zongxing Yang, Changzhong Jin, Juan Wang, Linfang Cheng, Xiaorong Peng, Fumin Liu, Xiuming Peng, Sujing Ji, Huilin Ou, Tiansheng Xie, Hangping Yao, Nanping Wu
MicroRNAs are potent gene expression regulators involved in regulating various biological processes, including host-pathogen interactions. In this study, we used high-throughput sequencing to investigate cellular miRNA signatures related to HIV-1 replication and latent infection in CD4(+) T cell lines, which included HIV-1-replicating H9/HTLV-IIIB, HIV-1-latently-infected CEM-Bru cells, and their parental uninfected H9 and CEM-SS cells. Relatively few miRNAs were found to be modulated by HIV-1 replication or latent infection, while the cell-lineage-specific miRNA difference was more pronounced, irrespective of HIV-1 infection...
July 2017: Archives of Virology
https://www.readbyqxmd.com/read/28250134/microrna-mir-126-5p-enhances-the-inflammatory-responses-of-monocytes-to-lipopolysaccharide-stimulation-by-suppressing-cylindromatosis-in-chronic-hiv-1-infection
#7
Jun Huang, Lingyan Zhu, Chao Qiu, Xuan Xu, Linxia Zhang, Xiangqing Ding, Qibin Liao, Jianqing Xu, Xiaoyan Zhang
Persistent immune activation during chronic human immunodeficiency virus type 1 (HIV-1) infection facilitates immune dysfunction and thereby fuels disease progression. The translocation of bacterial derivatives into blood and the hyperinflammatory responsiveness of monocytes have been considered important causative factors for persistent immune activation. Whether microRNAs (miRNAs) are involved in regulating monocyte-mediated inflammatory responses during chronic HIV-1 infection remains elusive. In this study, we show that miR-126-5p functions as a positive regulator of monocyte-mediated inflammatory responses...
May 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28236278/tat-mediated-induction-of-mirs-34a-138-promotes-astrocytic-activation-via-downregulation-of-sirt1-implications-for-aging-in-hand
#8
Guoku Hu, Ke Liao, Lu Yang, Gurudutt Pendyala, Yeonhee Kook, Howard S Fox, Shilpa Buch
Astrocyte activation is a hallmark of HIV infection and aging in the CNS. In chronically infected HIV patients, prolonged activation of astrocytes has been linked to accelerated aging including but not limited to neurocognitive impairment and frailty. The current study addresses the role of HIV protein Tat in inducing a set of small noncoding microRNAs (miRNA) that play critical role in astrogliosis. In our efforts to link astrocyte activation as an indicator of aging, we assessed the brains of both wild type and HIV transgenic rats for the expression of glial fibrillary acidic protein (GFAP)...
February 24, 2017: Journal of Neuroimmune Pharmacology: the Official Journal of the Society on NeuroImmune Pharmacology
https://www.readbyqxmd.com/read/28222782/identification-of-mirna-mrna-crosstalk-in-cd4-t-cells-during-hiv-1-infection-by-integrating-transcriptome-analyses
#9
Qibin Liao, Jin Wang, Zenglin Pei, Jianqing Xu, Xiaoyan Zhang
BACKGROUND: HIV-1-infected long-term nonprogressors (LTNPs) are characterized by infection with HIV-1 more than 7-10 years, but keeping high CD4(+) T cell counts and low viral load in the absence of antiretroviral treatment, while loss of CD4(+) T cells and high viral load were observed in the most of HIV-1-infected individuals with chronic progressors (CPs) However, the mechanisms of different clinical outcomes in HIV-1 infection needs to be further resolved. METHODS: To identify microRNAs (miRNAs) and their target genes related to distinct clinical outcomes in HIV-1 infection, we performed the integrative transcriptome analyses in two series GSE24022 and GSE6740 by GEO2R, R, TargetScan, miRDB, and Cytoscape softwares...
February 21, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28187417/a-machine-learning-approach-for-microrna-precursor-prediction-in-retro-transcribing-virus-genomes
#10
Müserref Duygu Saçar Demirci, Mustafa Toprak, Jens Allmer
Identification of microRNA (miRNA) precursors has seen increased efforts in recent years. The difficulty in experimental detection of pre-miRNAs increased the usage of computational approaches. Most of these approaches rely on machine learning especially classification. In order to achieve successful classification, many parameters need to be considered such as data quality, choice of classifier settings, and feature selection. For the latter one, we developed a distributed genetic algorithm on HTCondor to perform feature selection...
December 22, 2016: Journal of Integrative Bioinformatics
https://www.readbyqxmd.com/read/28096489/induced-packaging-of-cellular-micrornas-into-hiv-1-virions-can-inhibit-infectivity
#11
Hal P Bogerd, Edward M Kennedy, Adam W Whisnant, Bryan R Cullen
Analysis of the incorporation of cellular microRNAs (miRNAs) into highly purified HIV-1 virions revealed that this largely, but not entirely, mirrored the level of miRNA expression in the producer CD4(+) T cells. Specifically, of the 58 cellular miRNAs detected at significant levels in the producer cells, only 5 were found in virions at a level 2- to 4-fold higher than that predicted on the basis of random cytoplasmic sampling. Of note, these included two miRNAs, miR-155 and miR-92a, that were reported previously to at least weakly bind HIV-1 transcripts...
January 17, 2017: MBio
https://www.readbyqxmd.com/read/28039100/utility-of-systematic-isolation-of-immune-cell-subsets-from-hiv-infected-individuals-for-mirna-profiling
#12
Manel E Bargalló, Alberto C Guardo, Maria J Maleno, Laia Miralles, Lander Egaña-Gorroño, Tuixent Escribà, Felipe García, Jose M Gatell, Mireia Arnedo, Montserrat Plana
INTRODUCTION: Peripheral blood mononuclear cells (PBMCs) are frequently used for genomic analyses, but several factors can affect the yield and integrity of nucleic acids, including the methods of cell collection and isolation. The goal of this work was to analyze the utility of systematic isolation of different immune cell subsets by immunomagnetic separation and the RNA integrity after isolated cells from samples of HIV-infected patients. METHODS: PBMC from Healthy Controls (HC, n=15), Elite Controllers (EC, n=15), Viremic Controllers (VC, n=15), Viremic Progressors (VP, n=15) and HIV-infected patients on therapy (ART, n=15) were isolated by Ficoll-Paque density gradient centrifugation...
March 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28005686/transcriptome-analyses-identify-key-cellular-factors-associated-with-hiv-1-associated-neuropathogenesis-in-infected-men
#13
Narasimhan J Venkatachari, Siddhartha Jain, Leah Walker, Shalmali Bivalkar-Mehla, Ansuman Chattopadhyay, Ziv Bar-Joseph, Charles Rinaldo, Ann Ragin, Eric Seaberg, Andrew Levine, James Becker, Eileen Martin, Ned Sacktor, Velpandi Ayyavoo
OBJECTIVE: HIV-1 viral proteins and host inflammatory factors have a direct role in neuronal toxicity in vitro; however, the contribution of these factors in vivo in HIV-1-associated neurocognitive disorder (HAND) is not fully understood. We applied novel Systems Biology approaches to identify specific cellular and viral factors and their related pathways that are associated with different stages of HAND. DESIGN: A cross-sectional study of individuals enrolled in the Multicenter AIDS Cohort Study including HIV-1-seronegative (N = 36) and HIV-1-seropositive individuals without neurocognitive symptoms (N = 16) or with mild neurocognitive disorder (MND) (N = 8) or HIV-associated dementia (HAD) (N = 16)...
March 13, 2017: AIDS
https://www.readbyqxmd.com/read/28003477/argonaute-proteins-regulate-hiv-1-multiply-spliced-rna-and-viral-production-in-a-dicer-independent-manner
#14
Agathe Eckenfelder, Emmanuel Ségéral, Natalia Pinzón, Damien Ulveling, Céline Amadori, Marine Charpentier, Sabine Nidelet, Jean-Paul Concordet, Jean-François Zagury, Jean-Christophe Paillart, Clarisse Berlioz-Torrent, Hervé Seitz, Stéphane Emiliani, Sarah Gallois-Montbrun
Argonaute (Ago) proteins associate with microRNAs (miRNAs) to form the core of the RNA-induced silencing complex (RISC) that mediates post-transcriptional gene silencing of target mRNAs. As key players in anti-viral defense, Ago proteins are thought to have the ability to interact with human immunodeficiency virus type 1 (HIV-1) RNA. However, the role of this interaction in regulating HIV-1 replication has been debated. Here, we used high throughput sequencing of RNA isolated by cross-linking immunoprecipitation (HITS-CLIP) to explore the interaction between Ago2 and HIV-1 RNA in infected cells...
April 20, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/27993935/mirna-profiling-of-human-naive-cd4-t-cells-links-mir-34c-5p-to-cell-activation-and-hiv-replication
#15
Andreia J Amaral, Jorge Andrade, Russell B Foxall, Paula Matoso, Ana M Matos, Rui S Soares, Cheila Rocha, Christian G Ramos, Rita Tendeiro, Ana Serra-Caetano, José A Guerra-Assunção, Mariana Santa-Marta, João Gonçalves, Margarida Gama-Carvalho, Ana E Sousa
Cell activation is a vital step for T-cell memory/effector differentiation as well as for productive HIV infection. To identify novel regulators of this process, we used next-generation sequencing to profile changes in microRNA expression occurring in purified human naive CD4 T cells in response to TCR stimulation and/or HIV infection. Our results demonstrate, for the first time, the transcriptional up-regulation of miR-34c-5p in response to TCR stimulation in naive CD4 T cells. The induction of this miR was further consistently found to be reduced by both HIV-1 and HIV-2 infections...
February 1, 2017: EMBO Journal
https://www.readbyqxmd.com/read/27919232/microrna-27a-rs895819-is-associated-with-obesity-in-hiv-infected-preeclamptic-black-south-african-women-on-haart
#16
Niren Ray Maharaj, Prithiksha Ramkaran, Siddharthiya Pillay, Anil Amichund Chuturgoon
BACKGROUND: Preeclampsia (PE) and HIV/AIDS present a major health challenge globally. South Africa has the highest disease burden of both HIV/AIDS and PE in the world. Despite extensive research, the pathophysiology of these conditions is not completely understood, however a genetic predisposition in women may affect susceptibility. MiRNA-27a regulates adipogenesis and glucose metabolism. A single nucleotide polymorphism (SNP) in miRNA-27a (rs895819T > C) has shown to have disparate effects in various populations...
December 5, 2016: BMC Medical Genetics
https://www.readbyqxmd.com/read/27852859/kaposi-s-sarcoma-associated-herpesvirus-micrornas-target-gadd45b-to-protect-infected-cells-from-cell-cycle-arrest-and-apoptosis
#17
Xiaoyan Liu, Christine Happel, Joseph M Ziegelbauer
Kaposi's sarcoma is one of the most common malignancies in HIV-infected individuals. The responsible agent, Kaposi's sarcoma-associated herpesvirus (KSHV; HHV8), expresses multiple microRNAs (miRNAs), but the targets and functions of these miRNAs are not completely understood. After infection in primary endothelial cells with KSHV, growth arrest DNA damage-inducible gene 45 beta (GADD45B) is one of the most repressed genes using genomic expression profiling. GADD45B was also repressed in mRNA expression profiling experiments when KSHV miRNAs were introduced to uninfected cells...
February 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/27749601/microrna-210-microrna-331-and-microrna-7-are-differentially-regulated-in-treated-hiv-1-infected-individuals-and-are-associated-with-markers-of-systemic-inflammation
#18
Vibe Ballegaard, Ulrik Ralfkiaer, Karin K Pedersen, Malene Hove, Simon Koplev, Peter Brændstrup, Lars P Ryder, Hans O Madsen, Jan Gerstoft, Kirsten Grønbæk, Susanne D Nielsen
OBJECTIVE: Inflammation may contribute to an increased risk of cardiovascular disease (CVD) in HIV-1 infection. MicroRNAs (miRNAs) are involved in the regulation of inflammation. In treated HIV-1-infected individuals, we aimed to identify differentially expressed miRNAs with known roles in inflammation and CVD risk and to investigate associations between these and systemic inflammation. METHODS: In a screening cohort including 14 HIV-1-infected individuals and 9 uninfected controls, microarray profiling was performed using peripheral blood mononuclear cells (PBMCs)...
April 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27701053/microrna-related-polymorphisms-and-non-hodgkin-lymphoma-susceptibility-in-the-multicenter-aids-cohort-study
#19
MULTICENTER STUDY
Erin C Peckham-Gregory, Dharma R Thapa, Jeremy Martinson, Priya Duggal, Sudhir Penugonda, Jay H Bream, Po-Yin Chang, Sugandha Dandekar, Shen-Chih Chang, Roger Detels, Otoniel Martínez-Maza, Zuo-Feng Zhang, Shehnaz K Hussain
BACKGROUND: MicroRNAs, small non-coding RNAs involved in gene regulation, are implicated in lymphomagenesis. We evaluated whether genetic variations in microRNA coding regions, binding sites, or biogenesis genes (collectively referred to as miRNA-SNPs) were associated with risk of AIDS-associated non-Hodgkin lymphoma (AIDS-NHL), and serum levels of four lymphoma-related microRNAs. METHODS: Twenty-five miRNA-SNPs were genotyped in 180 AIDS-NHL cases and 529 HIV-infected matched controls from the Multicenter AIDS Cohort Study (MACS), and real-time polymerase chain reaction was used to quantify serum microRNA levels...
December 2016: Cancer Epidemiology
https://www.readbyqxmd.com/read/27634380/hiv-1-tat-shortened-neurite-outgrowth-through-regulation-of-microrna-132-and-its-target-gene-expression
#20
Pejman Rahimian, Johnny J He
BACKGROUND: Synaptodendritic damage is a pathological hallmark of HIV-associated neurocognitive disorders, and HIV-1 Tat protein is known to cause such injury in the central nervous system. In this study, we aimed to determine the molecular mechanisms of Tat-induced neurite shortening, specifically the roles of miR-132, an important regulator of neurite morphogenesis in this process. METHODS: The relationship between Tat expression and miR-132 expression was first determined using reverse transcription quantitative PCR (qRT-PCR) in Tat-transfected astrocytes and neurons, astrocytes from Tat-transgenic mice, and HIV-infected astrocytes...
September 15, 2016: Journal of Neuroinflammation
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