Project description:Immune patterns in Ebola patients were characterized depending on the outcome of the illness. Non-healthy controls were compared to Ebola patients to define the specificity of the immune response against Ebola virus infection.
Project description:The 2013-2016 Ebola Zaire virus (EBV) outbreak in West Africa resulted in over 28,000 cases and 11,000 deaths. Ebola virus disease (EVD) is a highly virulent systemic disease with a high case fatality rate of ~ 50%. EVD results in hemorrhagic fever marked by an exaggerated systemic inflammatory response, and impaired vascular and coagulation systems. The immune response of patients who either survived or died is characterized by strong differences. Notably, fatalities showed a diminished capacity to mount an appropriate immune response, resulting in high viremia and increased pro-inflammatory cytokine production. In this study, we analyzed 38 sequential samples collected from 12 patients: 8 survivors and 4 fatalities. Our analytical strategy combined three protein-based platforms covering three different fractions of the plasma proteome: the undepleted classical plasma proteome, the depleted plasma proteome, and cytokines/chemokines, using LC/MS- and antibody-based assays, resulting in over 1000 quantified host and pathogen proteins. For depletion of the most abundant plasma proteins, we advanced a perchloric acid-based precipitation method. This method is low cost, high-throughput and robust.
Project description:Clinical follow-up of Ebola virus disease (EVD) survivors revealed a persistence of clinical symptoms and higher risk of mortality. Long-term analyses of the immune and inflammatory profiles of EVD survivors are currently lacking. Here, we evaluate gene expression profiles in 26 Guinean Ebola virus disease survivors (EBOV_S) and 33 Healthy donnors (HD). We show a persistent increase of several biomarkers of inflammation, immune activation and gut tissue damage in EBOV_S compared to healthy donors living in the same area. Gene expression profiling in blood revealed a significant enrichment in genes associated with antiviral responses in EBOV_S.
Project description:Ebola virus can cause a severe and often fatal hemorrhagic fever in humans and other mammals, known as Ebola virus disease (EVD),the mechanism of how this pathogenesis comes about is not well understood, but it is well accepted that pathogenesis is significantly driven by a hyperactive immune response. To better understand the overall response to Ebola virus challenge, we undertook a transcriptomic analysis using the whole blood of EBOV infection patients.