Genome-wide analysis of primary peripheral blood mononuclear cells from HIV   patients-pre-and post- HAART show immune activation and inflammation the main drivers of host gene expressionReport as inadecuate




Genome-wide analysis of primary peripheral blood mononuclear cells from HIV   patients-pre-and post- HAART show immune activation and inflammation the main drivers of host gene expression - Download this document for free, or read online. Document in PDF available to download.

Molecular and Cellular Therapies

, 2:11

HIV pathogenesis and Treatment

Abstract

BackgroundAlthough the host gene expression in the context of HIV has been explored by several studies, it remains unclear how HIV is able to manipulate and subvert host gene machinery before and after highly active antiretroviral therapy HAART in the same individual. In order to define the underlying pharmaco-genomic basis of HIV control during HAART and genomic basis of immune deterioration prior to HAART initiation, we performed a genome-wide expression analysis using primary peripheral blood mononuclear cells PBMC derived from 14 HIV + subjects pre-highly active antiretroviral therapy HAART time point-1 or TP1 with detectable plasma viremia and post-HAART time point-2 or TP2 with effective control of plasma viremia <40 HIV RNA copies-mL of plasma.

MethodsGenomic RNA extracted from the PBMCs was used in microarray analysis using HT-12V3 Illumina chips. Illumina®BeadStudio Software was used to obtain differentially expressed DE genes. Only the genes with p value <0.01 and FDR of <5% were considered for analysis. Pathway analysis was performed in MetaCore™ to derive functional annotations. Functionally significant genes were validated by qRT-PCR.

ResultsBetween TP1 and TP2, 234 genes were differentially expressed DE. During viremic phase TP1, there was an orchestrated and coordinated up-regulation of immune, inflammation and antiviral genes, consistent with HIV infection and immune activation, which comprised of genes mainly involved in antiviral action of interferons and their signalling. In contrast, the therapy-mediated control phase TP2 showed systematic down-regulation of these pathways, suggesting that the reduction in plasma viremia with HAART has a considerable influence on reducing the immune activation, thereby implying a definitive role of HIV in subverting the human gene machinery.

ConclusionsThis is the first study to show the evidence for the differential regulation of gene expression between the untreated and treated time points, suggesting that gene expression is a consequence of cellular activation during plasma viremia. Affirmation to these observations comes from down-modulation of genes involved in cellular activation and inflammation upon initiation of HAART coinciding with below detectable levels of plasma viremia.

Electronic supplementary materialThe online version of this article doi:10.1186-2052-8426-2-11 contains supplementary material, which is available to authorized users.

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Author: Viviane N da Conceicao - Wayne B Dyer - Kaushal Gandhi - Priyanka Gupta - Nitin K Saksena

Source: https://link.springer.com/







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