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Homo sapiens

ABSTRACT: Longitudinal human bone marrow plasma cell responses to seasonal vaccination against influenza

PROVIDER: PRJNA649987 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12390718.fastq.gz	Fastqsanger.gz
	SRR12390719.fastq.gz	Fastqsanger.gz
	SRR12390720.fastq.gz	Fastqsanger.gz
	SRR12390721.fastq.gz	Fastqsanger.gz
	SRR12390722.fastq.gz	Fastqsanger.gz

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Project description:Objective: This study aimed to evaluate the effect of dendritic cell (DC) vaccination against HIV-1 on host gene expression profiles. Design: Longitudinal PBMC samples were collected from participants of the DC-TRN trial for immunotherapy against HIV. Microarray-assisted gene expression profiling was performed to evaluate the effects of vaccination and subsequent interruption of antiretroviral therapy on host genome expression. Data from the DC-TRN trial were compared with results from other vaccination trials. Methods: We used Affymetrix GeneChips for microarray gene expression analysis. Data were analyzed by principal component analysis and differential gene expression was assessed using linear modeling. Gene ontology enrichment and gene set analysis were used to characterize differentially expressed genes. Transcriptome analysis included comparison with PBMCs obtained from DC-vaccinated melanoma patients and of healthy individuals who received seasonal influenza vaccination. Results: DC-TRN immunotherapy in HIV-infected individuals resulted in a major shift in the transcriptome. Longitudinal analysis demonstrated that changes in the transcriptome sustained also during interruption of antiretroviral therapy. After DC-vaccination, the transcriptome was enriched for cellular immunity associated genes that were also induced in healthy adults who received live attenuated influenza virus vaccination. These beneficial responses were accompanied by detrimental signals of general immune activation. Conclusions: The DC-TRN induced changes in the transcriptome were profound, lasting, and consisted of both protective signals and signatures of inflammation and immune exhaustion, with a net result of decreased viral load, without clinical benefit. Thus transcriptome analysis provides useful information, dissecting both positive and negative effects, for the evaluation of safety and efficacy of immunotherapeutic strategies.

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Project description:Systems approaches have been used to describe molecular signatures driving immunity to influenza vaccination in humans. Whether such signatures are similar across multiple seasons, and in diverse populations is unknown. We applied systems approaches to study immune responses in young and, elderly subjects vaccinated with the seasonal influenza vaccine across 5 consecutive seasons. During the 2010 Influenza season, healthy adults were vaccinated with TIV, and blood samples isolated at days 0, 3, 7 post-vaccination. Microarrays were performed using total RNA extracted from the peripheral blood mononuclear cells of vaccinees.

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