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Transcriptional profiling of HBV-naïve subjects after vaccination against Hepatitis A/B viruses, Diphtheria/Tetanus toxoids and Cholera.

ABSTRACT: Transcriptional profiling of HBV-naïve subjects after vaccination against Hepatitis A/B viruses, Diphtheria/Tetanus toxoids and Cholera.

PROVIDER: PRJNA517724 | ENA |

REPOSITORIES: ENA

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Transcriptional profiling of HBV-naïve subjects after vaccination against Hepatitis A/B viruses, Diphtheria/Tetanus toxoids and Cholera.

Project description:Mechanisms of poor responses to vaccines remain unknown. Hepatitis B virus-naïve elderly subjects received three vaccines, including a vaccine against hepatitis B virus (HBV). Transcriptomic profilling of blood collected pre-vaccination and post-vaccination was performed in order to identify candidate biomarkers of antibody response to the different vaccines.

2020-05-19 | GSE125860 | GEO

Transcriptional profiling of HBV-naïve subjects before vaccination against Hepatitis A/B viruses, Diphtheria/Tetanus toxoids and Cholera.

Project description:Mechanisms of poor responses to vaccines remain unknown. Hepatitis B virus-naïve elderly subjects received three vaccines, including a vaccine against hepatitis B virus (HBV). Pre-vaccination high dimensional analyses of blood using transcriptional profiling and flow cytometry revealed that subjects having increased memory B cell frequencies and higher expression of genes downstream of B cell receptor signaling responded more strongly to the HBV vaccine whereas subjects having higher expression of inflammatory related genes and greater numbers of activated innate immune cells showed a weaker response to this vaccine. The heme-induced response was associated with the poor response to the hepatitis B vaccine. Transcriptional profiling and flow cytometry results were validated in a distinct set of elderly subjects with accuracy greater than 60%. Our study is the first that identifies baseline predictors of responses to vaccines in a population of subjects known to be highly susceptible to infections.

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Single-cell analysis of Diphtheria, Tetanus, and Pertussis (DTP)-vaccinated repertoire

Project description:Diphtheria, tetanus, and pertussis (DTP) are infectious diseases caused by toxin-producing bacteria that can be fatal, especially in children. Despite the availability of combined DTP vaccines for more than 60 years, a comprehensive understanding of how human antibodies respond to DTP vaccination, which helps further improve the vaccine remains elusive. Here, we aimed to characterize toxin-specific antibody repertoires following DTP vaccination. To this end, CD19+CD27+ antigen-experienced B cells obtained from four healthy donors 7-days post vaccination were sorted for toxin-binding and non-toxin-binding B cells, using each of the DTP recombinant toxins (DT, TT, and PT) as fluorescent bait. 10X single-cell immune profiling was then performed, followed by in silico antibody sequence clustering.

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Single-cell analysis of Diphtheria, Tetanus, and Pertussis (DTP)-vaccinated repertoire

Project description:Single-cell analysis of Diphtheria, Tetanus, and Pertussis (DTP)-vaccinated repertoire

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Leukocyte transcript alterations in West-African girls following a booster vaccination with diphtheria-tetanus-pertussis vaccine

Project description:Observational studies from low-income countries have shown that the vaccination against diphtheria, tetanus and pertussis (DTP) is associated with excess female mortality due to infectious diseases. To investigate possible changes in gene expression after DTP vaccination, we identified a group of nine comparable West African girls, from a biobank of 356 children, who were due to receive DTP booster vaccine at age 18 months. We extracted RNA from blood samples before, and 6 weeks after, vaccination to analyse the coding transcriptome in leukocytes using expression microarrays, and ended up with information from eight girls. The data was further analysed using dedicated array pathway and network software. We aimed to study whether DTP vaccination introduced a systematic alteration in the immune system in girls. We found very few transcripts to alter systematically. Those that did mainly belonged to the interferon (IFN) signalling pathway. We scrutinized this pathway as well as the interleukin pathways. Two out of eight showed a down-regulated IFN pathway and two showed an up-regulated IFN pathway. The two with down-regulated IFN pathway had also down-regulated IL-6 pathway. In the study of networks, two of the girls stood out as not having the inflammatory response as top altered network. In conclusion, the transcriptome changes following DTP booster vaccination were subtle, but it is possible to identify sub groups that deviate from each other, mainly in the IFN response. Microarrays (Human Exon 1.0 ST Arrays (Affymetrix )) were used to compare the gene expression alteration following DTP-vaccination in 18-19 months old West African girls. The gene expression analysis was based on RNA from venous blood. The blood was drawn immediately before DTP-vaccination (baseline sample) and 6 weeks after (42 -50 days, post-vaccination sample) in a total of eight girls

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Leukocyte transcript alterations in West-African girls following a booster vaccination with diphtheria-tetanus-pertussis vaccine

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